Imported nxcompext-3.1.0-2.tar.gznxcompext/3.1.0-2

Summary: Imported nxcompext-3.1.0-2.tar.gz
Keywords:

Imported nxcompext-3.1.0-2.tar.gz
into Git repository

34 files changed, 16471 insertions, 0 deletions

diff --git a/nxcompext/Alpha.c b/nxcompext/Alpha.c
new file mode 100644
index 000000000..bba191fa9
--- /dev/null
+++ b/nxcompext/Alpha.c
@@ -0,0 +1,42 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#include <zlib.h>
+
+#include "NXlib.h"
+
+#include "Alpha.h"
+#include "Z.h"
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+#define ALPHA_COMPRESSION_LEVEL      1
+#define ALPHA_COMPRESSION_THRESHOLD  32
+#define ALPHA_COMPRESSION_STRATEGY   Z_RLE
+
+static int alphaCompressionLevel     = ALPHA_COMPRESSION_LEVEL;
+static int alphaCompressionThreshold = ALPHA_COMPRESSION_THRESHOLD;
+static int alphaCompressionStrategy  = ALPHA_COMPRESSION_STRATEGY;
+
+char *AlphaCompressData(const char *data, unsigned int size, unsigned int *compressed_size)
+{
+  return ZCompressData(data, size, alphaCompressionThreshold, alphaCompressionLevel,
+                           alphaCompressionStrategy, compressed_size);
+}
diff --git a/nxcompext/Alpha.h b/nxcompext/Alpha.h
new file mode 100644
index 000000000..6ae9aee8e
--- /dev/null
+++ b/nxcompext/Alpha.h
@@ -0,0 +1,37 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Alpha_H
+#define Alpha_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern char *AlphaCompressData(
+#if NeedFunctionPrototypes
+    const char*       /* data */,
+    unsigned int      /* size */,
+    unsigned int*     /* compressed_size */
+#endif
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* Alpha_H */
diff --git a/nxcompext/Bitmap.c b/nxcompext/Bitmap.c
new file mode 100644
index 000000000..725eaacff
--- /dev/null
+++ b/nxcompext/Bitmap.c
@@ -0,0 +1,112 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "NXlib.h"
+
+#include "Bitmap.h"
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+char *BitmapCompressData(XImage *image, unsigned int *size)
+{
+  if (image -> bits_per_pixel != 32)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******BitmapCompressData: Nothing to do with image of [%d] bpp and size [%d].\n",
+                image -> bits_per_pixel, image -> bytes_per_line * image -> height);
+    #endif
+
+    *size = image -> bytes_per_line * image -> height;
+
+    return image -> data;
+  }
+  else
+  {
+    /*
+     * Remove the 4th byte from the bitmap.
+     */
+
+    char *data;
+
+    char *next_src;
+    char *next_dst;
+
+    #ifdef TEST
+
+    if (image -> bytes_per_line != 4 * image -> width)
+    {
+      fprintf(stderr, "******BitmapCompressData: PANIC! Image as [%d] bytes per line with expected [%d].\n",
+                  image -> bytes_per_line, 4 * image -> width);
+
+      return NULL;
+    }
+
+    #endif
+
+    *size = image -> width * image -> height * 3;
+
+    data = Xmalloc(*size);
+
+    if (data == NULL)
+    {
+      #ifdef PANIC
+      fprintf(stderr, "******BitmapCompressData: PANIC! Failed to allocate [%d] bytes for the destination.\n",
+                  *size);
+      #endif
+
+      *size = image -> bytes_per_line * image -> height;
+
+      return image -> data;
+    }
+
+    next_src = image -> data;
+    next_dst = data;
+
+    if (image -> byte_order == LSBFirst)
+    {
+      while (next_src < image -> data +
+                 image -> bytes_per_line * image -> height)
+      {
+        *next_dst++ = *next_src++;
+        *next_dst++ = *next_src++;
+        *next_dst++ = *next_src++;
+
+        next_src++;
+      }
+    }
+    else
+    {
+      while (next_src < image -> data +
+                 image -> bytes_per_line * image -> height)
+      {
+        next_src++;
+
+        *next_dst++ = *next_src++;
+        *next_dst++ = *next_src++;
+        *next_dst++ = *next_src++;
+      }
+    }
+
+    return data;
+  }
+}
diff --git a/nxcompext/Bitmap.h b/nxcompext/Bitmap.h
new file mode 100644
index 000000000..974aa426c
--- /dev/null
+++ b/nxcompext/Bitmap.h
@@ -0,0 +1,36 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Bitmap_H
+#define Bitmap_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern char *BitmapCompressData(
+#if NeedFunctionPrototypes
+    XImage*                   /* image */,
+    unsigned int*             /* compressed_size */
+#endif
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* Bitmap_H */
diff --git a/nxcompext/CHANGELOG b/nxcompext/CHANGELOG
new file mode 100644
index 000000000..c12dd66f8
--- /dev/null
+++ b/nxcompext/CHANGELOG
@@ -0,0 +1,770 @@
+ChangeLog:
+
+nxcompext-3.1.0-2
+
+- Updated file VERSION to match the current release version.
+
+nxcompext-3.1.0-1
+
+- Opened the 3.1.0 branch based on nxcompext-3.0.0-18.
+
+nxcompext-3.0.0-18
+
+- Removed the remaining debug output.
+
+nxcompext-3.0.0-17
+
+- Changed the copyright notices at the beginning of the files that
+  were referring to NXPROXY to refer to NXCOMPEXT.
+
+nxcompext-3.0.0-16
+
+- Handle the reply failure in NXGetShmemParameters().
+
+nxcompext-3.0.0-15
+
+- Separated the functionalities made available by NXQueryDisplay()
+  in three distinct functions:
+
+  NXDisplayReadable()  Query the number of bytes readable from
+                       the display connection.
+
+  NXDisplayFlushable() Query the number of the outstanding bytes
+                       to flush to the display connection.
+
+  NXDisplayCongestion() Return a value between 0 and 9 indicating
+                        the congestion level of the NX transport.
+
+- Renamed NXQueryDisplayError() to NXDisplayError().
+
+nxcompext-3.0.0-14
+
+- Removed support for Rdp, Tight and Hextile packed images encod-
+  ing since they have been made obsolete by the new NX server.
+
+- Changed the copyright attribution from Medialogic to NoMachine.
+
+nxcompext-3.0.0-13
+
+- Allocate 1024 additional bytes for the Jpeg compression, instead
+  of 512, to avoid failures on very tiny images.
+
+- Removed support for the special *PNG_JPEG* pack method.
+
+nxcompext-3.0.0-12
+
+- Implemented the NXEncodeBitmap() method. This is a very simple
+  encoder removing the 4th byte in 32 bits-per-plane images. For
+  the other pixmap depths it simply returns a pointer to the orig-
+  inal image data, saving the copy. This encoding is intended to
+  better leverage the stream compression on low bandwidth links.
+
+- Removed the quality parameter from the RGB/RLE encoding function.
+
+nxcompext-3.0.0-11
+
+- Removed the additional parameter in the call to NXTransFlush().
+
+nxcompext-3.0.0-10
+
+- Moved the _NXRDPGlyph and _NXRDPText declarations from NXlib.h
+  to NXproto.h to force fields to be CARD32.
+
+- Fixed a typo in NXSetDisplayBuffer() that could cause a double
+  free.
+
+- Fixed a compilation error with old GCC versions.
+
+- Removed the warning issued on AMD64 when compiling with the logs
+  enabled.
+
+nxcompext-3.0.0-9
+
+- Added the NXDisplayCongestion query type to NXQueryDisplay(). It
+  returns a value between 0 and 9, with 9 meaning that the link is
+  congested and no further data can be sent.
+
+- Added the NXSetDisplayBuffer() function. It allows the caller to
+  set the display output buffer size at runtime.
+
+- Removed the congestion and synchronization callbacks.
+
+nxcompext-3.0.0-8
+
+- Removed the warnings issued when purging the collected data at
+  display reset.
+
+nxcompext-3.0.0-7
+
+- Added the NXSetDisplayWriteHandler() interface. The function
+  registers a callback that will be invoked every time more data
+  is written to the display socket.
+
+nxcompext-3.0.0-6
+
+- Made NXQueryDisplay() take into account the bytes in the display
+  buffer when queried for the bytes flushable.
+
+nxcompext-3.0.0-5
+
+- Added file COPYING.
+
+nxcompext-3.0.0-4
+
+- Updated copyright notices to the current year.
+
+nxcompext-3.0.0-3
+
+- Imported changes up to nxcompext-2.1.0-4.
+
+- Fixed TR12D01564. Changed configure script to build library with
+  -fPIC option.
+
+- Added 256 byte to the size of Jpeg destination buffer. 
+
+nxcompext-3.0.0-2
+
+- Updated the file VERSION.
+
+nxcompext-3.0.0-1
+
+- Opened the 3.0.0 branch based on nxcompext-2.0.0-33.
+
+nxcompext-2.0.0-33
+
+- Placed the inclusion of jpeglib.h after the X includes to fix a
+  possible compilation error.
+
+nxcompext-2.0.0-32
+
+- Avoid to copy the data to the scratch buffer and yield the task
+  of padding the output to _XSend() in the NXPutPackedImage(), NX-
+  SetUnpackAlpha() and NXSetUnpackColormap() requests.
+
+- Added support for the RLE pack method.
+
+nxcompext-2.0.0-31
+
+- The X_NXSetUnpackColormap and X_NXSetUnpackAlpha now carry their
+  data in compressed form. The alpha data is compressed using the
+  ZLIB RLE encoding, while the colormap data is compressed using
+  the default ZLIB deflate.
+
+- Created new message structures to handle the compatibility with
+  the old proxy versions. When connected to an old proxy version
+  the agent should use the NXSetUnpackColormapCompat() and NXSet-
+  UnpackAlpha() interfaces.
+
+nxcompext-2.0.0-30
+
+- Removed the unfriendly warning printed if a client tried to reset
+  the library multiple times.
+
+nxcompext-2.0.0-29
+
+- Made possible to compile even if makedepend is not found.
+
+nxcompext-2.0.0-28
+
+- Added the NXSetDisplaySynchronizationHandler() interface. The NX
+  transport will use the callback to report when the agent can use
+  the available bandwidth to synchronize the X objects that are
+  corrupted or incomplete.
+
+- Bytes from 14 to 24 in the NXGetControlParameters() reply report,
+  respectively, the frame timeout, the ping timeout, the preferred
+  image split mode and the split size threshold.
+
+nxcompext-2.0.0-27
+
+- Changed the image cleanup functions and the Png and Jpeg encoders
+  to be independent from the host endianess.
+
+- Enabled again the image cleanup on big endian machines.
+
+nxcompext-2.0.0-26
+
+- Added the NXAbortSplit() request.
+
+- Added information about the size of the shared memory segment used
+  by the remote proxy in the NXGetShmemParameters() reply.
+
+nxcompext-2.0.0-25
+
+- Renamed the NXGetSplitResource() and NXGetUnpackResource() utili-
+  ties to NXAllocSplit() and NXAllocUnpack(). They can be called
+  with a NXAnyResource parameter to get the first available id or
+  requre a specific resource. From this version the resource must
+  be explicitly reserved. NXFreeUnpack() and NXFreeSplit() check
+  if the resource was allocated and don't do anything if it is not
+  the case. NXAllocSplit() and NXAllocUnpack() return NXNoResource
+  if the resource can't be reserved.
+
+nxcompext-2.0.0-24
+
+- NXFlushDisplay() now verifies whether the XlibDisplayWriting flag
+  is set before flushing the display buffer. in this case, it only
+  flushes the NX link.
+
+nxcompext-2.0.0-23
+
+- Implemented a move-to-front strategy for the image cache, to mi-
+  nimize the number of lookups.
+
+- Fixed the problems imtroduced by the new cache implementation by
+  modifying the memory allocation routines in Jpeg.c and Pgn.c.
+
+- Temporarily fixed the cleanup problems on big-endian machines by
+  skipping the operation.
+
+- Added a NXSetDisplayStatisticsHandler() to let the agent include
+  arbitrary data in the transport statistics. The parameter is a
+  pointer to a pointer to a null terminated string. The pointer is
+  set at the time the handler is registered. The pointed string can
+  be filled by the agent with its statistics data.
+
+nxcompext-2.0.0-22
+
+- The NXCacheFindImage() returns a pointer to the checksum, if the
+  image is found.
+
+- The image cache uses the data passed to NXCacheAddImage() instead
+  of making a copy.
+
+- The Z stream used by the RGB encoder is allocated at initializat-
+  ion and freed at reset.
+
+nxcompext-2.0.0-21
+
+- Removed the reliance on the local byte order in the image cleanup
+  functions.
+
+nxcompext-2.0.0-20
+
+- Added the NXFinishSplit() request. It forces the proxy to comple-
+  tely transfer all the split messages for the given resource, and
+  then notify the agent.
+
+nxcompext-2.0.0-19
+
+- Enabled again the cleanup of images.
+
+- Updated to comply with the new NXTransFlush() interface.
+
+nxcompext-2.0.0-18
+
+- Moved all the declarations in Rgb.c at the beginning of the block
+  to avoid the possible compilation errors with old compilers.
+
+nxcompext-2.0.0-17
+
+- Added a new RGB image encoder. For now the encoder uses a static
+  Z stream to compress the image data in the destination buffer and
+  allows the agent to use the simplest encoding by still separating
+  the alpha channel from the image data. The new encoder can be the
+  the base for implementing color reduction by dithering or a color-
+  mapped translation of the image similar to PNG, but without the
+  PNG overhead and with the colormap being sent to the client using
+  the NXSetUnpackColormap() opcode.
+
+- Created a new NXCleanImage() function that takes a XImage pointer
+  and uses either the CleanXYImage() or the CleanZImage() routines
+  to cleanup the padding bits.
+
+nxcompext-2.0.0-16
+
+- Added a parameter to NXFlushDisplay() to specify what needs to be
+  flushed. The parameter can be one the following values, defined
+  in NXvars.h:
+
+  NXFlushBuffer   Only the Xlib buffer is to be flushed.
+
+  NXFlushLink     Flush both the Xlib buffer and any pending
+                  data encoded by the NX transport.
+
+  NXFlushIdle     Inform the NX transport that the agent is
+                  idle. This will let the NX transport encode
+                  more low-priority data, and then flush the
+                  link.
+
+- Ensured that the padding bytes are cleaned when creating a new
+  PNG image. It seems that some images are still missed. This is
+  to be investigated.
+
+nxcompext-2.0.0-15
+
+- Ensured that the packed image cache is recreated only on a size
+  change.
+
+nxcompext-2.0.0-14
+
+- Updated to get the karma delay field from the X_NXGetControlPara-
+  meters reply.
+
+nxcompext-2.0.0-13
+
+- Added the NXSetDisplayPolicy() and NXSetDisplayFlushHandler() in-
+  terfaces. The second function registers a callback that will be
+  invoked by the NX transport when the number of bytes encoded by
+  the proxy exceeds the threshold set for the scheduled write.
+
+- Added the NXFlushDisplay() and NXQueryDisplay() interfaces. They
+  are used to hide the corresponding NX transport functions to the
+  application. NXQueryDisplay() can be called with the NXDisplay-
+  Flushable or NXDisplayReadable parameters, to get, repectively,
+  the number of bytes that are queued to the NX transport and the
+  number of bytes that is possible to read.
+
+- Included the remote proxy version in the NXGetControlParameter()
+  reply.
+
+nxcompext-2.0.0-12
+
+- Added the NXGetSplitResource() and NXGetUnpackResource utilities.
+  These can be used by the client to find out the first unused id
+  available for a split or unpack operation.
+
+- Added the NXFreeSplit() request function. It makes the resource
+  available for the next operation and tells the proxy to destroy
+  all the storage associated to the split.
+
+- Renamed the NXNumberOfConnections constant to NXNumberOfResources.
+
+nxcompext-2.0.0-11
+
+- Changed NXForceDisplayError() to also shut down the NX transport
+  by calling NXTransClose().
+
+- Updated to comply with the new NX function prototypes introduced
+  in nxcomp-2.0.0-31.
+
+nxcompext-2.0.0-10
+
+- NXQueryDisplayError() now checks the predicate function only if
+  the I/O error was not encountered already.
+
+nxcompext-2.0.0-9
+
+- Added the NXSetDisplayErrorPredicate(), NXSetDisplayBlockHand-
+  ler(), NXSetDisplayCongestionHandler(), NXSetLostSequenceHand-
+  ler() interfaces to let the user set the values used internal-
+  ly. All functions return the previous handler. See ChangeLog
+  in nx-X11-2.0.0-16 and nx-X11-2.0.0-17.
+
+- Moved all the internal variables shared between Xlib, nxcompext
+  and the X server in nxcomp. Declarations and function prototypes
+  moved to NXvars.h.
+
+- Some name changes. In particular the NXContinueOnDisplayError()
+  function iss renamed NXHandleDisplayError() and NXDisplayError()
+  is now renamed NXQueryDisplayError(). To verify if the display
+  is valid, NXQueryDisplayError() will now call the _NXDisplayEr-
+  rorPredicate function, or, if the predicate function is not set,
+  will simply check the value of the XlibDisplayIOError flag.
+
+- Removed the NXGetCleanupParameters() and NXGetImageParameters()
+  interfaces and the remaining references to the unused display
+  buffer and image cleanup functions.
+
+- Updated the NoMachine copyright notice to year 2006.
+
+nxcompext-2.0.0-8
+
+- Removed the unused screen parameter from XSetUnpackGeometry().
+
+- NXSetUnpackGeometry() now fails if no visual is provided.
+
+nxcompext-2.0.0-7
+
+- Changed the LICENSE file to state that the software is only made
+  available under the version 2 of the GPL.
+
+- Removed the misplaced DXPC copyright notices from the license.
+  They were copied from NXCOMP but they don't apply in any way to
+  NXCOMPEXT.
+
+nxcompext-2.0.0-6
+
+- Added the NXSetCacheParameters() request. It tells to the local
+  proxy how to handle the X requests, namely if the next requests
+  have to be stored in the memory cache, split in smal data chunks,
+  and in the case of images, saved on disk in the persistent image
+  cache. The request will affect all X messages, including plain
+  and packed images. It can be used to tell the proxy to discard
+  images coming from some selected operations, like GLX or XVideo.
+
+nxcompext-2.0.0-5
+
+- Added the NXGetFontParameters() request and reply. If the proxy
+  has been configured accordingly, the request returns the X font
+  path that can be set by the agent to tunnel the font server con-
+  nections through the NX link.
+
+nxcompext-2.0.0-4
+
+- Initial work on font server tunneling.
+
+nxcompext-2.0.0-3
+
+- Renamed the NXSetExposeEvents request to NXSetExposeParameters.
+
+nxcompext-2.0.0-2
+
+- Modified the configure and the makefiles to support the Cygwin
+  environment.
+
+- Renamed Png.h to Pgn.h to avoid name clashes on Windows.
+
+- The distclean target now removes the autom4te.cache directory.
+
+nxcompext-2.0.0-1
+
+- Opened the 2.0.0 branch based on nxcompext-1.5.0-20.
+
+nxcompext-1.5.0-20
+
+- Removed the code installing a SIGSEGV handler before trying to
+  clean an image in NXCleanImageInPlace().
+
+nxcompext-1.5.0-19
+
+- Added the NXUnsetLibraryPath() function to specify the behaviour
+  of the Popen() in the X server. If the _NXUnsetLibraryPath flag
+  is set, the Popen() will remove the LD_LIBRARY_PATH variable from
+  the environment before running the child process. This will cause
+  the X server to run the process (for example the keyboard initia-
+  lization utilities) by using the native system libraries, instead
+  of the libraries shipped with the NX environment.
+
+nxcompext-1.5.0-18
+
+- Moved the declarations of _NXEnable* and related structures from
+  Xlibint.h to NXlibint.h.  
+
+- Use the include files from nx-X11 if the nx-X11/include directory
+  is found. The previous configure checked the presence of nx-X11/
+  exports/include, that might not be built at the time this library
+  is compiled.
+
+nxcompext-1.5.0-17
+
+- Added the -fPIC GCC flag when compiling on AMD64 architectures.
+
+- Removed all warnings when compiling with GCC4.
+
+- Small changes to configure.in to have specific CFLAGS.
+
+- Created a new configure using autoconf 2.59.
+
+nxcompext-1.5.0-16
+
+- Added the 'mode' field in the NXStartSplit() request. It determi-
+  nes the strategy that the proxy will adopt to handle the image.
+  If set to 'eager', the proxy will only split the messages whose
+  size exceeds the split threshold (the threshold can be found in
+  the NXGetControlParameters() reply). If mode is set to lazy, the
+  proxy will split any image that it is not able to find in its
+  cache.
+
+  The opcode and the two available modes are defined in NXproto.h,
+  currently:
+
+  #define NXSplitModeDefault  0
+  #define NXSplitModeEager    1
+  #define NXSplitModeLazy     2
+
+- All requests related to image streaming now carry a 'resource' id.
+  The id is currently ignored by the proxy in the case of NXCommit-
+  Split() requests.
+
+nxcompext-1.5.0-15
+
+- Removed the NXSync() and NXKarma() operations, not used anymore
+  by the NX agents.
+
+- Updated to comply with changes occurred in the numbering of the
+  notification events and in the interface to the image streaming
+  functions.
+
+nxcompext-1.5.0-14
+
+- Accounted for the missing xoffset field in clean-up of XYPixmaps.
+
+nxcompext-1.5.0-13
+
+- Added a 'commit' field in NXCommitSplit(). When zero, the remote
+  proxy will remove the message from the split store, without send-
+  ing the recomposed image to the X server.
+
+nxcompext-1.5.0-12
+
+- Added the NXContinueOnDisplayError() function to specify the be-
+  haviour of the Xlib I/O error handler. If the flag is set to true,
+  Xlib will simply return, instead of quitting the program. This
+  leaves to the application the responsibility of checking the sta-
+  te of the XlibDisplayIOError flag.
+
+- Changed NXDisplayIsValid() to NXDisplayError() and inverted the
+  logic. Now the function returns true if the display pointer is
+  NULL or the XlibDisplayIOError flag is set.
+
+- Added the NXForceDisplayError() function, to shutdown the display
+  descriptor and force Xlib to set the I/O error flag.
+
+nxcompext-1.5.0-11
+
+- Added -I../nx-X11/exports/include to CCINCLUDES in Makefile.in.
+
+nxcompext-1.5.0-10
+
+- Added FindLSB() to replace ffs() that may be not present on some
+  systems.
+
+- Some cosmetic changes.
+
+nxcompext-1.5.0-9
+
+- Fixed a printf() that prevented the code to compile if TEST was
+  enabled.
+
+nxcompext-1.5.0-8
+
+- Implemented the NXLib interface for asynchronous handling of the
+  XGetInputFocus requests and replies.
+
+nxcompext-1.5.0-7
+
+- Removed the _NXFlushSize parameter. New agents run the NX trans-
+  port in-process, so we don't get any benefit from increasing the
+  display buffer size.
+
+nxcompext-1.5.0-6
+
+- Added a NXDisplayIsValid() to check that the display is not NULL
+  and that the descriptor was not shut down after an IOError. The
+  reason a function is needed for this is that the flags field is
+  only in Xlibint and it is not visible to Xlib applications.
+
+nxcompext-1.5.0-5
+
+- Added the NXGetCollect*Resource utility functions, returning the
+  first available small integer resource id that can be used in a
+  subsequent collect request.
+
+nxcompext-1.5.0-4
+
+- Added the NXNumberOfConnections constant.
+
+nxcompext-1.5.0-3
+
+- Implemented the NXLib interface for the asynchronous handling of
+  the XGrabPointer requests and replies.
+
+- Solved an error in image cleaning that prevented the 8 bits-per-
+  pixel images to be completely cleaned. Due to the bug, only half
+  of the total lines were cleaned.
+
+- Removed a bug that prevented the cleaning of XYPixmaps images of
+  bitmap unit 32 and byte order LSB.
+
+- Renamed the NXImageCache variables to show they are global. They
+  are currently used in the nxagent code.
+
+nxcompext-1.5.0-2
+
+- Changed VERSION file.
+
+nxcompext-1.5.0-1
+
+- Opened the 1.5.0 branch.
+
+nxcompext-1.4.1-1
+
+- Removed the configure option --with-static. There are two options
+  now, --with-static-png and --with-static-jpeg, to offer a greater
+  degree of control on the resulting library.
+
+- This version differs from the 1.4.0-3-KRY1 in the way that the con-
+  figure script is generated by GNU Autoconf 2.57, the same version
+  used for nxcomp.
+
+- Opened the 1.4.1 branch.
+
+nxcompext-1.4.0-3
+
+- Updated the VERSION file to reflect the 1.4.0 status.
+
+nxcompext-1.4.0-2
+
+- Imported changes from the latest 1.3.2 development branch.
+
+- The 1.4.0 branch already had a 1.4.0-1 version. The changes from
+  the 1.4.0-1 were up to date with the 1.3.2-2 version.
+
+nxcompext-1.3.2-6
+
+- Fixed problem with icons in KDE and Mozilla on SPARC Solaris. The
+  problem was related to cleaning of one-bit XYPixmaps on big-endian
+  hosts, where shift of the cleaning mask executed in the wrong di-
+  rection.
+
+nxcompext-1.3.2-5
+
+- Changes in Clean.c to compile on Solaris.
+
+nxcompext-1.3.2-4
+
+- Fixed a bug in clean image procedures for 1bit XYPixmaps. The bug
+  caused Mozilla to trash some transparent icons in web pages and
+  the toolbar.
+
+- Added cleaning of the padding bytes at the end of the data chunk
+  inside XImage structure
+
+- Implemented handling of SIGSEGV during cleanup in case of static
+  data.
+
+- Moved image cleanup and masking code in new Clean.c and Mask.c
+  sources.
+
+- Corrected few typos in NXCollectImage code.
+
+nxcompext-1.3.2-2
+
+- Imported 1.4.0-1 changes from the 1.4.0 development branch.
+
+- Modified NXAllocColors to handle errors generated allocating
+  each requested color. A per-color result code is now returned 
+  to the caller.
+
+- Code cleanup in Png.h and Png.c.
+
+nxcompext-1.3.2-1
+
+- Opened the 1.3.2 branch.
+
+nxcompext-1.3.1-2
+
+- Removed the underline characters and added a colon in the
+  title of this ChangeLog to fully comply with format used in
+  the release notices.
+
+nxcompext-1.3.1-1
+
+- Opened the 1.3.1 branch.
+
+nxcompext-1.3.0-18
+
+- Added the _NXLostSequenceHandler function to let NX agents
+  suppress the error message and modify the default Xlib
+  behaviour when out-of-order sequence numbers are received.
+  Pointer to function is assigned to _NXLostSequenceFunction
+  in XlibInt.c.
+
+- Original output buffer size in stock XFree86 is 2048. We try
+  to reduce context switches and help stream compression by
+  increasing the maximum size of the buffer 8192. _NXFlushSize
+  determines when the display buffer is actually flushed. It is
+  set by default to 4096 in XlibInt.c and set to 0 to use the
+  maximum available size at the time NXGetControlParameters()
+  is called.
+
+nxcompext-1.3.0-17
+
+- In handling of asynchronous GetProperty replies a warning
+  message was printed in session log when a null property was
+  stored in the state structure. This message is now printed
+  only if TEST is defined.
+
+nxcompext-1.3.0-16
+
+- Added asynchronous handling of GetProperty request and reply
+  by means of the NXCollectProperty and NXGetCollectedProperty
+  requests and the NXCollectPropertyNotify event.
+
+nxcompext-1.3.0-15
+
+- Added 4 new fields to the X_NXGetControlParameters reply.
+
+nxcompext-1.3.0-14
+
+- Added request X_NXFreeUnpack to free the resources allocated
+  by the remote proxy to unpack images for the given agent's
+  client
+
+nxcompext-1.3.0-13
+
+- Modified the following requests to carry the id of the
+  agent's client in the field resource:
+
+  - X_NXSetUnpackGeometry
+  - X_NXSetUnpackColormap
+  - X_NXSetUnpackAlpha
+  - X_NXPutPackedImage
+
+nxcompext-1.3.0-11
+
+- Modified the MIT-SHM initialization procedure to always send
+  all the 3 protocol requests also in the case of early failures.
+
+nxcompext-1.3.0-10
+
+- Added handling of X_NXSetUnpackAlpha request.
+
+- It has been made possible to send both X_NXSetUnpackColormap
+  and X_NXSetUnpackAlpha messages with 0 entries to temporarily
+  disable use of the colormap or the alpha channel and free the
+  resources allocated by the remote proxy.
+
+nxcompext-1.3.0-9
+
+- Solved a compatibility problem when mixing proxy versions
+  1.2.2 and 1.3.0 due to the missing X_NXGetShmemParameters
+  request.
+
+nxcompext-1.3.0-7
+
+- Reduced the number of requests needed to setup the shared
+  segment at X server proxy from 4 to 3.
+
+- Small changes to the shared memory interface to support
+  path X agent to X client proxy.
+
+nxcompext-1.3.0-6
+
+- Implemented initial support for MIT-SHM extension in the
+  network path between the X server proxy and the real X
+  server.
+
+- Configure script now checks for the FreeBSD environment.
+
+- New configure script generated using autoconf-2.57-3.
+
+- Removed the XFree86 CCDEFINES from Makefile.in.
+
+nxcompext-1.3.0-5
+
+- Cosmetic changes.
+
+- Started to convert configure.in to the new layout adopted
+  for nxcomp.
+
+- Created file CHANGELOG.
+
+nxcompext-1.3.0-4
+
+- More fixes in image clean-up.
+
+nxcompext-1.3.0-3
+
+- Many fixes in image clean-up functions to handle differences
+  in endianess between client and X server.
+
+nxcompext-1.3.0-2
+
+- Modified configure.in to compile under Solaris.
+
+nxcompext-1.3.0-1
+
+- First 1.3.0 version based on nxcompext-1.2.2-12.
+
diff --git a/nxcompext/COPYING b/nxcompext/COPYING
new file mode 100644
index 000000000..d511905c1
--- /dev/null
+++ b/nxcompext/COPYING
@@ -0,0 +1,339 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
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+
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+(2) offer you this license which gives you legal permission to copy,
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+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
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+want its recipients to know that what they have is not the original, so
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+
+  Finally, any free program is threatened constantly by software
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+  The precise terms and conditions for copying, distribution and
+modification follow.
+
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+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
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+language.  (Hereinafter, translation is included without limitation in
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+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
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+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
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+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
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+  2. You may modify your copy or copies of the Program or any portion
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+These requirements apply to the modified work as a whole.  If
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+This section is intended to make thoroughly clear what is believed to
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+
+Each version is given a distinguishing version number.  If the Program
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+later version", you have the option of following the terms and conditions
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+
+  10. If you wish to incorporate parts of the Program into other free
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+
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+
+	    How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
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+  To do so, attach the following notices to the program.  It is safest
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+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
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+
+    You should have received a copy of the GNU General Public License along
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+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
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+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
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+
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+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
diff --git a/nxcompext/Clean.c b/nxcompext/Clean.c
new file mode 100644
index 000000000..cc022004f
--- /dev/null
+++ b/nxcompext/Clean.c
@@ -0,0 +1,341 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#include <stdio.h>
+#include <signal.h>
+
+#include "os.h"
+
+#include "NXlib.h"
+
+#include "Clean.h"
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+int CleanXYImage(XImage *image)
+{
+  int i, j, k, plane;
+
+  int bitsToClean = (image -> bytes_per_line << 3) - image -> width - image -> xoffset;
+
+  unsigned int bytesToClean = bitsToClean >> 3;
+
+  bitsToClean &= 7;
+
+  for (k = 0; k < image -> depth; k++)
+  {
+    plane = k * (image -> bytes_per_line * image -> height);
+
+    for (i = 1; i <= image -> height; i++)
+    {
+      if (image -> byte_order == image -> bitmap_bit_order)
+      {
+        for (j = 1; j <= bytesToClean; j++)
+        {
+          image -> data[plane + i * (image -> bytes_per_line) - j] = 0x00;
+        }
+      }
+      else
+      {
+        for (j = bytesToClean; j >= 1; j--)
+        {
+          image -> data[plane + i * (image -> bytes_per_line) - j] = 0x00;
+        }
+      }
+
+      if (image -> bitmap_bit_order == MSBFirst)
+      {
+        image -> data[plane + i * (image -> bytes_per_line) - j] &= 0xff << bitsToClean;
+      }
+      else
+      {
+        image -> data[plane + i * (image -> bytes_per_line) - j] &= 0xff >> bitsToClean;
+      }
+    }
+  }
+
+  return 1;
+}
+
+int CleanZImage(XImage *image)
+{
+  unsigned int bytesToClean;
+  unsigned int j;
+  unsigned int imageLength;
+
+  #ifdef TEST
+  fprintf(stderr, "*****CleanZImage: Going to clean image of [%d] bits per pixel.\n",
+              image -> bits_per_pixel);
+  #endif
+
+  switch (image -> bits_per_pixel)
+  {
+    case 32:
+    {
+      /*
+       * The caller should pay attention at extracting
+       * the alpha channel prior to cleaning the image.
+       * Cleaning an image which is carrying the alpha
+       * channel will result in the image being treated
+       * as fully transparent.
+       */
+
+      register int i;
+
+      bytesToClean = image -> bytes_per_line * image -> height;
+
+      #ifdef DEBUG
+      fprintf(stderr, "*****CleanZImage: Cleaning [%d] bytes with bits per pixel [%d] "
+                  "width [%d] bytes per line [%d] height [%d].\n", bytesToClean,
+                      image -> bits_per_pixel, image -> width, image ->
+                          bytes_per_line, image -> height);
+      #endif
+
+      if (image -> byte_order == LSBFirst)
+      {
+        for (i = 3; i < bytesToClean; i += 4)
+        {
+          ((unsigned char *) image -> data)[i] = 0x00;
+        }
+      }
+      else
+      {
+        for (i = 0; i < bytesToClean; i += 4)
+        {
+          ((unsigned char *) image -> data)[i] = 0x00;
+        }
+      }
+
+      break;
+    }
+    case 24:
+    case 15:
+    case 16:
+    case 8:
+    {
+      register int i, j;
+
+      bytesToClean = image -> bytes_per_line -
+                           ((image -> width * image -> bits_per_pixel) >> 3);
+
+      for (i = 1; i <= image -> height; i++)
+      {
+        for (j = bytesToClean; j > 0; j--)
+        {
+          ((unsigned char *) image -> data)[(i * image -> bytes_per_line) - j] = 0x00;
+        }
+      }
+
+      break;
+    }
+    default:
+    {
+      #ifdef PANIC
+      fprintf(stderr, "*****CleanZImage: PANIC! Cannot clean image with [%d] bits per pixel.\n",
+                  image -> bits_per_pixel);
+      #endif
+    }
+  }
+
+  /* 
+   * Clean the padding bytes at the real
+   * end of the buffer.
+   */
+
+  imageLength = image -> bytes_per_line * image -> height;
+
+  bytesToClean = imageLength % 4;
+
+  for (j = 0; j < bytesToClean; j++)
+  {
+    ((unsigned char *)image -> data)[(imageLength + j)] = 0x00;
+  }
+
+  return 1;
+}
+
+/*
+ * Copy a clean version of src_image into dst_image.
+ * This code is not taking care of the image format.
+ * The agent doesn't use it and you have to consider
+ * it unsupported.
+ */
+
+int CopyAndCleanImage(XImage *src_image, XImage *dst_image)
+{
+  register long data_size;
+  register int i;
+
+  data_size = (src_image -> bytes_per_line * src_image -> height) >> 2;
+
+  #ifdef WARNING
+  fprintf(stderr, "******CleanImage: WARNING! Function called with image of [%d] bits per pixel.\n",
+              src_image -> bits_per_pixel);
+  #endif
+
+  switch (src_image -> bits_per_pixel)
+  {
+    case 32:
+    {
+      unsigned int mask;
+
+      if (src_image -> byte_order == MSBFirst)
+      {
+        mask = 0xffffff00;
+      }
+      else
+      {
+        mask = 0x00ffffff;
+      }
+      for (i = 0; i < data_size; i++)
+      {
+        ((unsigned int *)dst_image -> data)[i] = ((unsigned int *)src_image -> data)[i] & mask;
+      }
+
+      break;
+    }
+
+    case 24:
+    {
+      unsigned int bytes_to_clean;
+
+      for (i = 0; i < data_size; i++)
+      {
+        ((unsigned int *)dst_image -> data)[i] = ((unsigned int *)src_image -> data)[i];
+      }
+
+      bytes_to_clean = dst_image -> bytes_per_line - ((dst_image -> width *
+                           dst_image -> bits_per_pixel) >> 3);
+
+      if (bytes_to_clean)
+      {
+        register unsigned int mask = 0xffffffff;
+        register int line_size;
+        register int i;
+                
+        line_size = dst_image -> bytes_per_line >> 2;
+
+        if (dst_image -> byte_order == MSBFirst)
+        {
+          mask = mask << (bytes_to_clean << 3);
+        }
+        else
+        {
+          mask = mask >> (bytes_to_clean << 3);
+        }
+
+        for (i = 0; i < dst_image -> height;)
+        {
+          ((unsigned char *)dst_image -> data)[(++i * line_size) -1] &= mask;
+        }
+      }
+
+      break;
+    }
+
+    case 15:
+    case 16:
+    {
+      for (i = 0; i < data_size; i++)
+      {
+        ((unsigned int *) dst_image -> data)[i] = ((unsigned int *) src_image -> data)[i];
+      }
+
+      if (src_image -> width & 0x00000001)
+      {
+        int card32_per_line = dst_image -> bytes_per_line >> 2;
+
+        for (i = 0; i < dst_image -> height;)
+        {
+          ((unsigned int *) dst_image -> data)[(++i * card32_per_line) -1] &= 0x0000ffff;
+        }
+      }
+
+      break;
+    }
+
+    case 8:
+    {
+      unsigned int mask = 0x00000000;
+
+      switch (dst_image -> width % 4)
+      {
+        case 3:
+        {
+          mask = 0x00ffffff;
+
+          break;
+        }
+        case 2:
+        {
+          mask = 0x0000ffff;
+
+          break;
+        }
+        case 1:
+        {
+          mask = 0x000000ff;
+
+          break;
+        }
+        default:
+        {
+          /*
+           * Nothing to clean.
+           */
+
+          break;
+        }
+      }
+
+      for (i = 0; i < data_size; i++)
+      {
+        ((unsigned int *) dst_image -> data)[i] = ((unsigned int *) src_image -> data)[i];
+      }
+
+      if (mask)
+      {
+        int card32_per_line;
+        int i;
+
+        card32_per_line = dst_image -> bytes_per_line >> 2;
+
+        for (i = 0; i < dst_image -> height; i++)
+        {
+          ((unsigned int *) dst_image -> data)[(++i * card32_per_line) -1] &= mask;
+        }
+      }
+
+      break;
+    }
+
+    default:
+    {
+      #ifdef PANIC
+      fprintf(stderr, "******CleanImage: PANIC! Cannot clean image of [%d] bits per pixel.\n",
+                  src_image -> bits_per_pixel);
+      #endif
+
+      return 0;
+    }
+  }
+
+  return 1;
+}
diff --git a/nxcompext/Clean.h b/nxcompext/Clean.h
new file mode 100644
index 000000000..ba2a62dc4
--- /dev/null
+++ b/nxcompext/Clean.h
@@ -0,0 +1,36 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Clean_H
+#define Clean_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "Xlib.h"
+
+int CleanXYImage(XImage *image);
+int CleanZImage(XImage *image);
+
+int CopyAndCleanImage(XImage *src_image, XImage *dst_image);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* Clean_H */
diff --git a/nxcompext/Colormap.c b/nxcompext/Colormap.c
new file mode 100644
index 000000000..2e169edab
--- /dev/null
+++ b/nxcompext/Colormap.c
@@ -0,0 +1,42 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#include <zlib.h>
+
+#include "NXlib.h"
+
+#include "Colormap.h"
+#include "Z.h"
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+#define COLORMAP_COMPRESSION_LEVEL      4
+#define COLORMAP_COMPRESSION_THRESHOLD  32
+#define COLORMAP_COMPRESSION_STRATEGY   Z_DEFAULT_STRATEGY
+
+static int colormapCompressionLevel     = COLORMAP_COMPRESSION_LEVEL;
+static int colormapCompressionThreshold = COLORMAP_COMPRESSION_THRESHOLD;
+static int colormapCompressionStrategy  = COLORMAP_COMPRESSION_STRATEGY;
+
+char *ColormapCompressData(const char *data, unsigned int size, unsigned int *compressed_size)
+{
+  return ZCompressData(data, size, colormapCompressionThreshold, colormapCompressionLevel,
+                           colormapCompressionStrategy, compressed_size);
+}
diff --git a/nxcompext/Colormap.h b/nxcompext/Colormap.h
new file mode 100644
index 000000000..42eff34a4
--- /dev/null
+++ b/nxcompext/Colormap.h
@@ -0,0 +1,37 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Colormap_H
+#define Colormap_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern char *ColormapCompressData(
+#if NeedFunctionPrototypes
+    const char*       /* data */,
+    unsigned int      /* size */,
+    unsigned int*     /* compressed_size */
+#endif
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* Colormap_H */
diff --git a/nxcompext/Jpeg.c b/nxcompext/Jpeg.c
new file mode 100644
index 000000000..cb854bc6c
--- /dev/null
+++ b/nxcompext/Jpeg.c
@@ -0,0 +1,472 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "X11/X.h"
+#include "X11/Xlib.h"
+#include "X11/Xmd.h"
+
+#include <jpeglib.h>
+
+#include "NXlib.h"
+
+#include "Mask.h"
+#include "Jpeg.h"
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+#define JPEG_DEST_SIZE(width, height) ((width) * 3 * (height) + 1024)
+
+/*
+ * Local function prototypes.
+ */
+
+static void PrepareRowForJpeg(CARD8 *dst, int y, int count);
+static void PrepareRowForJpeg24(CARD8 *dst, int y, int count);
+static void PrepareRowForJpeg16(CARD8 *dst, int y, int count);
+static void PrepareRowForJpeg32(CARD8 *dst, int y, int count);
+
+static int JpegEmptyOutputBuffer(j_compress_ptr cinfo);
+
+static void JpegInitDestination(j_compress_ptr cinfo);
+static void JpegTermDestination(j_compress_ptr cinfo);
+static void JpegSetDstManager(j_compress_ptr cinfo);
+
+/*
+ * Quality levels.
+ */
+
+static int jpegQuality[10] = {20, 30, 40, 50, 55, 60, 65, 70, 75, 80};
+
+/*
+ * Image characteristics.
+ */
+
+static int bytesPerLine;
+
+static CARD8 bitsPerPixel;
+static CARD16 redMax, greenMax, blueMax;
+static CARD8  redShift, greenShift, blueShift;
+static int byteOrder;
+
+/*
+ * Other variables used for the Jpeg
+ * encoding.
+ */
+
+static char *jpegBeforeBuf = NULL;
+static char *jpegCompBuf;
+static int  jpegCompBufSize;
+static int  jpegError;
+static int  jpegDstDataLen;
+
+static struct jpeg_destination_mgr jpegDstManager;
+
+/*
+ * Just for debugging purpose.
+ */
+
+#ifdef DEBUG
+
+static int  jpegId;
+static char jpegName[10];
+static FILE *jpegFile;
+
+#endif
+
+/*
+ * Function declarations
+ */
+
+char *JpegCompressData(XImage *image, int level, int *compressed_size)
+{
+  struct jpeg_compress_struct cinfo;
+  struct jpeg_error_mgr jerr;
+
+  CARD8 *srcBuf;
+  JSAMPROW rowPointer[1];
+
+  int dy, w, h;
+
+  *compressed_size = 0;
+
+  /*
+   * Initialize the image stuff
+   */
+
+  bitsPerPixel = image -> bits_per_pixel;
+  bytesPerLine = image -> bytes_per_line;
+  byteOrder = image -> byte_order;
+
+  #ifdef TEST
+  fprintf(stderr, "******JpegCompressData: Image byte order [%d] bitmap bit order [%d].\n",
+              image -> byte_order, image -> bitmap_bit_order);
+
+  fprintf(stderr, "******JpegCompressData: Bits per pixel [%d] bytes per line [%d].\n",
+              bitsPerPixel, bytesPerLine);
+  #endif
+
+  redShift   = FindLSB(image -> red_mask)   - 1;
+  greenShift = FindLSB(image -> green_mask) - 1;
+  blueShift  = FindLSB(image -> blue_mask)  - 1;
+
+  #ifdef TEST
+  fprintf(stderr, "******JpegCompressData: Red mask [0x%lx] green mask [0x%lx] blue mask [0x%lx].\n",
+              image -> red_mask, image -> green_mask, image -> blue_mask);
+
+  fprintf(stderr, "******JpegCompressData: Red shift [%d] green shift [%d] blue shift [%d].\n",
+              redShift, greenShift, blueShift);
+  #endif
+
+  redMax   = image -> red_mask   >> redShift;
+  greenMax = image -> green_mask >> greenShift;
+  blueMax  = image -> blue_mask  >> blueShift;
+
+  #ifdef TEST
+  fprintf(stderr, "******JpegCompressData: Red max [0x%x] green max [0x%x] blue max [0x%x].\n",
+              redMax, greenMax, blueMax);
+  #endif
+
+  w = image -> width;
+  h = image -> height;
+
+  jpegBeforeBuf = image -> data;
+
+  #ifdef DEBUG
+  fprintf(stderr, "******JpegCompressData: Width [%d] height [%d] level [%d].\n",
+              w, h, level);
+  #endif
+
+  if (bitsPerPixel == 1 ||
+          bitsPerPixel == 8)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******JpegCompressData: PANIC! Invalid bits per pixel [%d].\n",
+                bitsPerPixel);
+    #endif
+
+    return NULL;
+  }
+
+  /*
+   * Allocate space for one line of the
+   * resulting image, 3 bytes per pixel.
+   */
+
+  #ifdef DEBUG
+  fprintf(stderr, "******JpegCompressData: Allocating [%d] bytes for the scanline.\n",
+              w * 3);
+  #endif
+
+  srcBuf = (CARD8 *) malloc(w * 3);
+
+  if (srcBuf == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******JpegCompressData: PANIC! Cannot allocate [%d] bytes.\n",
+                w * 3);
+    #endif
+
+    return NULL;
+  }
+
+  rowPointer[0] = srcBuf;
+
+  cinfo.err = jpeg_std_error(&jerr);
+
+  jpeg_create_compress(&cinfo);
+
+  cinfo.image_width = w;
+  cinfo.image_height = h;
+  cinfo.input_components = 3;
+  cinfo.in_color_space = JCS_RGB;
+
+  jpeg_set_defaults(&cinfo);
+  jpeg_set_quality(&cinfo, jpegQuality[level], 1);
+
+  /*
+   * Allocate memory for the destination
+   * buffer.
+   */
+
+  jpegCompBufSize = JPEG_DEST_SIZE(w, h);
+
+  #ifdef TEST
+  fprintf(stderr, "******JpegCompressData: Allocating [%d] bytes for the destination data.\n",
+              jpegCompBufSize);
+  #endif
+
+  jpegCompBuf = malloc(jpegCompBufSize);
+
+  if (jpegCompBuf == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******JpegCompressData: PANIC! Error allocating [%d] bytes for the Jpeg data.\n",
+                jpegCompBufSize);
+    #endif
+
+    return NULL;
+  }
+
+  JpegSetDstManager(&cinfo);
+
+  jpeg_start_compress(&cinfo, 1);
+
+  #ifdef DEBUG
+  fprintf(stderr, "******JpegCompressedData: Initialization finished.\n");
+  #endif
+
+  for (dy = 0; dy < h; dy++)
+  {
+    PrepareRowForJpeg(srcBuf, dy, w);
+
+    jpeg_write_scanlines(&cinfo, rowPointer, 1);
+
+    if (jpegError != 0)
+    {
+      break;
+    }
+  }
+
+  #ifdef DEBUG
+  fprintf(stderr, "******JpegCompressedData: Compression finished. Lines handled [%d,%d]. Error is [%d].\n",
+              dy, h, jpegError);
+  #endif
+
+  if (jpegError == 0)
+  {
+    jpeg_finish_compress(&cinfo);
+  }
+
+  jpeg_destroy_compress(&cinfo);
+
+  free((char *) srcBuf);
+
+  if (jpegError != 0)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******JpegCompressedData: PANIC! Compression failed. Error is [%d].\n",
+                jpegError);
+    #endif
+
+    free(jpegCompBuf);
+
+    return NULL;
+  }
+
+  /*
+   * Check the size of the resulting data.
+   */
+
+  if (jpegDstDataLen > 0)
+  {
+    /*
+     * Save the image on disk to help with
+     * the debug.
+     */
+
+    #ifdef DEBUG
+
+    int i = 0;
+
+    fprintf(stderr, "******JpegCompressedData: Compressed size [%d].\n",
+                jpegDstDataLen);
+
+    jpegId++;
+
+    sprintf(jpegName, "jpeg%d", jpegId);
+
+    jpegFile = fopen(jpegName, "w");
+
+    for (i = 0; i < jpegDstDataLen; i++)
+    {
+      fprintf(jpegFile, "%c", *(jpegCompBuf + i));
+    }
+
+    fclose(jpegFile);
+
+    #endif
+
+    *compressed_size = jpegDstDataLen;
+
+    return jpegCompBuf;
+  }
+  else
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******JpegCompressedData: PANIC! Invalid size of the compressed data [%d].\n",
+                jpegDstDataLen);
+    #endif
+
+    free(jpegCompBuf);
+
+    return NULL;
+  }
+}
+
+void PrepareRowForJpeg(CARD8 *dst, int y, int count)
+{
+  if (bitsPerPixel == 32)
+  {
+    if (redMax == 0xff &&
+            greenMax == 0xff &&
+                blueMax == 0xff)
+    {
+      PrepareRowForJpeg24(dst, y, count);
+    }
+    else
+    {
+      PrepareRowForJpeg32(dst, y, count);
+    }
+  }
+  else if (bitsPerPixel == 24)
+  {
+    memcpy(dst, jpegBeforeBuf + y * bytesPerLine, count * 3);
+  }
+  else
+  {
+    /*
+     * 16 bpp assumed.
+     */
+
+    PrepareRowForJpeg16(dst, y, count);
+  }
+}
+
+void PrepareRowForJpeg24(CARD8 *dst, int y, int count)
+{
+  CARD8 *fbptr;
+  CARD32 pix;
+
+  fbptr = (CARD8 *) (jpegBeforeBuf + y * bytesPerLine);
+
+  while (count--)
+  {
+    if (byteOrder == LSBFirst)
+    {
+      pix = (CARD32) *(fbptr + 2);
+      pix = (pix << 8) | (CARD32) *(fbptr+1);
+      pix = (pix << 8) | (CARD32) *fbptr;
+    }
+    else
+    {
+      pix = (CARD32) *(fbptr + 1);
+      pix = (pix << 8) | (CARD32) *(fbptr + 2);
+      pix = (pix << 8) | (CARD32) *(fbptr + 3);
+    }
+
+    *dst++ = (CARD8)(pix >> redShift);
+    *dst++ = (CARD8)(pix >> greenShift);
+    *dst++ = (CARD8)(pix >> blueShift);
+
+    fbptr+=4;
+  }
+}
+
+#define DEFINE_JPEG_GET_ROW_FUNCTION(bpp)                                   \
+                                                                            \
+void PrepareRowForJpeg##bpp(CARD8 *dst, int y, int count)                   \
+{                                                                           \
+  CARD8 *fbptr;                                                             \
+  CARD##bpp pix;                                                            \
+  int inRed, inGreen, inBlue;                                               \
+  int i;                                                                    \
+                                                                            \
+  fbptr = (CARD8 *) (jpegBeforeBuf + y * bytesPerLine);                     \
+                                                                            \
+  while (count--)                                                           \
+  {                                                                         \
+    pix = 0;                                                                \
+                                                                            \
+    if (byteOrder == LSBFirst)                                              \
+    {                                                                       \
+      for (i = (bpp >> 3) - 1; i >= 0; i--)                                 \
+      {                                                                     \
+        pix = (pix << 8) | (CARD32) *(fbptr + i);                           \
+      }                                                                     \
+    }                                                                       \
+    else                                                                    \
+    {                                                                       \
+      for (i = 0; i < (bpp >> 3); i++)                                      \
+      {                                                                     \
+        pix = (pix << 8) | (CARD32) *(fbptr + i);                           \
+      }                                                                     \
+    }                                                                       \
+                                                                            \
+    fbptr += bpp >> 3;                                                      \
+                                                                            \
+    inRed = (int)                                                           \
+            (pix >> redShift   & redMax);                                   \
+    inGreen = (int)                                                         \
+            (pix >> greenShift & greenMax);                                 \
+    inBlue  = (int)                                                         \
+            (pix >> blueShift  & blueMax);                                  \
+                                                                            \
+    *dst++ = (CARD8)((inRed   * 255 + redMax / 2) /                         \
+                         redMax);                                           \
+    *dst++ = (CARD8)((inGreen * 255 + greenMax / 2) /                       \
+                         greenMax);                                         \
+    *dst++ = (CARD8)((inBlue  * 255 + blueMax / 2) /                        \
+                         blueMax);                                          \
+  }                                                                         \
+}
+
+DEFINE_JPEG_GET_ROW_FUNCTION(16)
+DEFINE_JPEG_GET_ROW_FUNCTION(32)
+
+/*
+ * Destination manager implementation for JPEG library.
+ */
+
+void JpegInitDestination(j_compress_ptr cinfo)
+{
+  jpegError = 0;
+
+  jpegDstManager.next_output_byte = (JOCTET *) jpegCompBuf;
+  jpegDstManager.free_in_buffer = (size_t) jpegCompBufSize;
+}
+
+int JpegEmptyOutputBuffer(j_compress_ptr cinfo)
+{
+  jpegError = 1;
+
+  jpegDstManager.next_output_byte = (JOCTET *) jpegCompBuf;
+  jpegDstManager.free_in_buffer = (size_t) jpegCompBufSize;
+
+  return 1;
+}
+
+void JpegTermDestination(j_compress_ptr cinfo)
+{
+  jpegDstDataLen = jpegCompBufSize - jpegDstManager.free_in_buffer;
+}
+
+void JpegSetDstManager(j_compress_ptr cinfo)
+{
+  jpegDstManager.init_destination = JpegInitDestination;
+  jpegDstManager.empty_output_buffer = JpegEmptyOutputBuffer;
+  jpegDstManager.term_destination = JpegTermDestination;
+
+  cinfo -> dest = &jpegDstManager;
+}
+
diff --git a/nxcompext/Jpeg.h b/nxcompext/Jpeg.h
new file mode 100644
index 000000000..87740df6d
--- /dev/null
+++ b/nxcompext/Jpeg.h
@@ -0,0 +1,38 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Jpeg_H
+#define Jpeg_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern char *JpegCompressData(
+#if NeedFunctionPrototypes
+    XImage*                   /* image */,
+    int                       /* level */,
+    int*                      /* compressed_size */
+#endif
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* Jpeg_H */
+
diff --git a/nxcompext/LICENSE b/nxcompext/LICENSE
new file mode 100644
index 000000000..56815a248
--- /dev/null
+++ b/nxcompext/LICENSE
@@ -0,0 +1,21 @@
+Copyright (C) 2001, 2007 NoMachine - http://www.nomachine.com/.
+
+NXCOMPEXT library and NX extensions to X are copyright of NoMachine.
+Redistribution and use of this software is allowed according to the
+following terms:
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License Version 2, and
+not any other version, as published by the Free Software Foundation.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTA-
+BILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
+Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, you can request a copy to NoMachine
+or write to the Free Software Foundation, Inc., 59 Temple Place,
+Suite 330, Boston, MA  02111-1307 USA
+
+All rights reserved.
diff --git a/nxcompext/Makefile.in b/nxcompext/Makefile.in
new file mode 100644
index 000000000..cdf0b1cd9
--- /dev/null
+++ b/nxcompext/Makefile.in
@@ -0,0 +1,162 @@
+############################################################################
+#                                                                          #
+#  Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com.           #
+#                                                                          #
+#  NXCOMPEXT, NX protocol compression and NX extensions to this software   #
+#  are copyright of NoMachine. Redistribution and use of the present       #
+#  software is allowed according to terms specified in the file LICENSE    #
+#  which comes in the source distribution.                                 #
+#                                                                          #
+#  Check http://www.nomachine.com/licensing.html for applicability.        #
+#                                                                          #
+#  NX and NoMachine are trademarks of NoMachine S.r.l.                     #
+#                                                                          #
+#  All rights reserved.                                                    #
+#                                                                          #
+############################################################################
+
+#
+# Get values from configure script.
+#
+
+VERSION=@VERSION@
+LIBVERSION=@LIBVERSION@
+
+#
+# We want to enable really all warnings. -Wredundant-decls,
+# though, gives a warning caused by pthread.h and unistd.h.
+#
+
+CXX         = @CXX@
+CXXFLAGS    = @CXXFLAGS@ @X_CFLAGS@ @DEFS@ \
+              -Wall -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes \
+              -Wmissing-declarations -Wnested-externs
+CXXINCLUDES = -I. -I../nxcomp
+CXXDEFINES  =
+
+CC          = @CC@
+CCFLAGS     = @CFLAGS@ @X_CFLAGS@ @DEFS@ \
+              -Wall -Wpointer-arith -Wstrict-prototypes -Wmissing-prototypes \
+              -Wmissing-declarations -Wnested-externs
+CCINCLUDES  = -I. -I../nxcomp
+CCDEFINES   =
+
+LDFLAGS     = @LDFLAGS@ -L../nxcomp
+LIBS        = @LIBS@ -lz -lX11 -lXcomp
+
+#
+# Only if THREADS is defined
+#
+# LIBS = @LIBS@ -lz -ljpeg -lpthread -lX11 -lXcomp
+#
+
+srcdir      = @srcdir@
+prefix      = @prefix@
+exec_prefix = @exec_prefix@
+bindir      = @bindir@
+man1dir     = @mandir@/man1
+VPATH       = @srcdir@
+
+INSTALL         = @INSTALL@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_DATA    = @INSTALL_DATA@
+
+#
+# This should be autodetected.
+#
+
+MAKEDEPEND     = @MAKEDEPEND@
+DEPENDINCLUDES =  -I/usr/include/c++ -I/usr/include/g++ -I/usr/include/g++-3 
+
+.SUFFIXES: .cpp.c
+
+.cpp.o:
+	$(CXX) -c $(CXXFLAGS) $(CXXINCLUDES) $<
+.c.o:
+	$(CC) -c $(CCFLAGS) $(CCINCLUDES) $<
+
+LIBRARY = Xcompext
+
+LIBNAME    = lib$(LIBRARY)
+LIBFULL    = lib$(LIBRARY).so.$(VERSION)
+LIBLOAD    = lib$(LIBRARY).so.$(LIBVERSION)
+LIBSHARED  = lib$(LIBRARY).so
+LIBARCHIVE = lib$(LIBRARY).a
+
+LIBCYGSHARED  = cyg$(LIBRARY).dll
+LIBCYGARCHIVE = lib$(LIBRARY).dll.a
+
+all: depend @ALL@
+
+MSRC=
+
+CSRC=	NXlib.c		\
+	Clean.c		\
+	Mask.c		\
+	Colormap.c	\
+	Alpha.c		\
+	Jpeg.c		\
+	Pgn.c		\
+	Bitmap.c	\
+	Rgb.c		\
+	Rle.c		\
+        Z.c
+
+CXXSRC=
+
+MOBJ   = $(MSRC:.c=.o)
+COBJ   = $(CSRC:.c=.o)
+CXXOBJ = $(CXXSRC:.cpp=.o)
+
+$(LIBFULL):	 $(CXXOBJ) $(COBJ)
+		 $(CXX) -o $@ $(LDFLAGS) $(CXXOBJ) $(COBJ) $(LIBS)
+
+$(LIBLOAD):	 $(LIBFULL)
+		 rm -f $(LIBLOAD)
+		 ln -s $(LIBFULL) $(LIBLOAD)
+
+$(LIBSHARED):	 $(LIBFULL)
+		 rm -f $(LIBSHARED)
+		 ln -s $(LIBFULL) $(LIBSHARED)
+
+$(LIBARCHIVE):	 $(CXXOBJ) $(COBJ)
+		 rm -f  $(LIBARCHIVE)
+		 ar clq $(LIBARCHIVE) $(CXXOBJ) $(COBJ)
+		 ranlib $(LIBARCHIVE)
+
+$(LIBCYGSHARED): $(LIBARCHIVE)
+		 $(CC) -shared -o $(LIBCYGSHARED) \
+		 -Wl,--out-implib=$(LIBCYGARCHIVE) \
+		 -Wl,--export-all-symbols \
+		 -Wl,--enable-auto-import \
+		 -Wl,--whole-archive $(LIBARCHIVE) \
+		 -Wl,--no-whole-archive $(LIBS) \
+		 $(LDFLAGS)
+
+$(LIBCYGARCHIVE): $(LIBCYGSHARED)
+
+depends:	depend.status
+
+depend:		depend.status
+
+depend.status:	
+		if [ -x $(MAKEDEPEND) ] ; then \
+			$(MAKEDEPEND) $(CXXINCLUDES) $(CCINCLUDES) \
+                        $(DEPENDINCLUDES) -f Makefile $(MSRC) $(CSRC) \
+			$(CXXSRC) 2>/dev/null; \
+		fi
+		touch depend.status
+
+install:	install.bin install.man
+
+install.bin:
+
+install.man:
+
+clean:
+		-rm -f *~ *.o *.bak *.orig *.rej st?????? core core.* *.out.* \
+		@ALL@
+
+distclean:	clean
+		-rm -rf autom4te.cache config.status config.log \
+		config.cache depend.status Makefile tags
diff --git a/nxcompext/Mask.c b/nxcompext/Mask.c
new file mode 100644
index 000000000..b04989d44
--- /dev/null
+++ b/nxcompext/Mask.c
@@ -0,0 +1,794 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#include <stdio.h>
+
+#include "Xlib.h"
+
+#include "NXpack.h"
+
+#include "Mask.h"
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+/*
+ * Try first to reduce to a white or black
+ * pixel. If not possible, apply the mask.
+ * Note that correction is applied at the
+ * time pixel is unpacked.
+ */
+
+#define MaskPixel(red, green, blue, mask) \
+\
+if (red > mask -> white_threshold && \
+        green > mask -> white_threshold && \
+            blue > mask -> white_threshold) \
+{ \
+    red = green = blue = 0xff; \
+} \
+else if (red < mask -> black_threshold && \
+             green < mask -> black_threshold && \
+                 blue < mask -> black_threshold) \
+{ \
+    red = green = blue = 0x00; \
+} \
+else \
+{ \
+    red   = red   & mask -> color_mask; \
+    green = green & mask -> color_mask; \
+    blue  = blue  & mask -> color_mask; \
+}
+
+int MaskImage(const ColorMask *mask, XImage *src_image, XImage *dst_image)
+{
+  unsigned long pixel;
+
+  register unsigned int red;
+  register unsigned int green;
+  register unsigned int blue;
+
+  register unsigned long data_size;
+
+  register unsigned int i;
+
+  data_size = (src_image -> bytes_per_line * src_image -> height) >> 2;
+
+  #ifdef TEST
+  fprintf(stderr, "******MaskImage: Going to mask image with [%d] bits per pixel.\n",
+              src_image -> bits_per_pixel);
+  #endif
+
+  if (src_image -> bits_per_pixel == 24 || src_image -> bits_per_pixel == 32)
+  {
+    register unsigned char *pixel_addr;
+
+    for (i = 0; i < data_size; i++)
+    {
+      pixel = ((unsigned long *) src_image -> data)[i];
+
+      pixel_addr = (unsigned char *) &pixel;
+
+      red   = pixel_addr[2];
+      green = pixel_addr[1];
+      blue  = pixel_addr[0];
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskImage: 24/32 bits original R [%d] G [%d] B [%d] A [%d].\n",
+              red, green, blue, pixel_addr[3]);
+      #endif
+
+      MaskPixel(red, green, blue, mask);
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskImage: 24/32 bits masked R [%d] G [%d] B [%d] A [%d].\n",
+                  red, green, blue, pixel_addr[3]);
+      #endif
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskImage: 24/32 bits pixel 0x%lx", pixel);
+      #endif
+
+      pixel_addr[2] = red;
+      pixel_addr[1] = green;
+      pixel_addr[0] = blue;
+
+      ((unsigned long*)dst_image -> data)[i] = pixel;
+
+      #ifdef DEBUG
+      fprintf(stderr, " -> 0x%lx\n", pixel);
+      #endif
+    }
+
+    return 1;
+  }
+  else if (src_image -> bits_per_pixel == 16)
+  {
+    /* 
+     * FIXME: Masking doesn't work in 16 bpp.
+     *
+
+    unsigned long src_addr, *dst_addr;
+    unsigned short *src_pixels_addr, *dst_pixels_addr;
+
+    for (i = 0; i < data_size; i++)
+    {
+      src_addr = ((unsigned long *)src_image -> data)[i];
+      dst_addr = (unsigned long *)((unsigned long *)dst_image -> data + i);
+
+      src_pixels_addr = ((unsigned short *) &src_addr);
+      dst_pixels_addr = ((unsigned short *) dst_addr);
+
+      red   = (src_pixels_addr[0] & src_image -> red_mask)   >> 8;
+      green = (src_pixels_addr[0] & src_image -> green_mask) >> 3;
+      blue  = (src_pixels_addr[0] & src_image -> blue_mask)  << 3;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskImage: 16 bits original R [%d] G [%d] B [%d].\n",
+              red, green, blue);
+      #endif
+
+      MaskPixel(red, green, blue, mask);
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskImage: 16 bits masked R [%d] G [%d] B [%d].\n",
+              red, green, blue);
+      #endif
+
+      dst_pixels_addr[0] = ((red << 8)   & src_image -> red_mask)   |
+                           ((green << 3) & src_image -> green_mask) |
+                           ((blue >> 3)  & src_image -> blue_mask);
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskImage: 16 bits pixel 0x%x", dst_pixels_addr[0]);
+      #endif
+
+      red   = (src_pixels_addr[1] & src_image -> red_mask)   >> 8;
+      green = (src_pixels_addr[1] & src_image -> green_mask) >> 3;
+      blue  = (src_pixels_addr[1] & src_image -> blue_mask)  << 3;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskImage: 16 bits original R [%d] G [%d] B [%d].\n",
+              red, green, blue);
+      #endif
+
+      MaskPixel(red, green, blue, mask);
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskImage: 16 bits masked R [%d] G [%d] B [%d].\n",
+              red, green, blue);
+      #endif
+
+      dst_pixels_addr[1] = ((red << 8)   & src_image -> red_mask)   |
+                           ((green << 3) & src_image -> green_mask) |
+                           ((blue >> 3)  & src_image -> blue_mask);
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskImage: 16 bits pixel 0x%x", dst_pixels_addr[0]);
+      #endif
+    }
+
+    if (dst_image -> width & 0x00000001)
+    {
+      int card32_per_line;
+      int i;
+
+      card32_per_line = dst_image -> bytes_per_line >> 2;
+
+      for (i = 0; i < dst_image -> height;)
+      {
+        ((CARD32 *) dst_image -> data)[(++i * card32_per_line) - 1] &= 0x0000ffff;
+      }
+    }
+
+    *
+    * End of FIXME.
+    */
+  }
+  else
+  {
+    #ifdef TEST
+    fprintf(stderr, "******MaskImage: PANIC! Cannot apply mask with [%d] bits per pixel.\n",
+                src_image -> bits_per_pixel);
+    #endif
+
+    return 0;
+  }
+
+  return 1;
+}
+
+int MaskInPlaceImage(const ColorMask *mask, XImage *image)
+{
+  unsigned long pixel;
+
+  register unsigned int red;
+  register unsigned int green;
+  register unsigned int blue;
+
+  register unsigned int i;
+
+  register unsigned long data_size;
+
+  data_size = (image -> bytes_per_line * image -> height)>>2;
+
+  #ifdef TEST
+  fprintf(stderr, "******MaskInPlaceImage: Going to mask image with [%d] bits per pixel.\n",
+              image -> bits_per_pixel);
+  #endif
+
+  if (image -> bits_per_pixel == 24 || image -> bits_per_pixel == 32)
+  {
+    register unsigned char *pixel_addr;
+
+    for (i = 0; i < data_size; i++)
+    {
+      pixel = ((unsigned long *) image -> data)[i];
+
+      pixel_addr = (unsigned char *) &pixel;
+
+      red   = pixel_addr[2];
+      green = pixel_addr[1];
+      blue  = pixel_addr[0];
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskInPlaceImage: 24/32 bits original R [%d] G [%d] B [%d] A [%d].\n",
+                  red, green, blue, pixel_addr[3]);
+      #endif
+
+      MaskPixel(red, green, blue, mask);
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskInPlaceImage: 24/32 bits masked R [%d] G [%d] B [%d] A [%d].\n",
+                  red, green, blue, pixel_addr[3]);
+      #endif
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskInPlaceImage: 24/32 bits pixel 0x%lx", pixel);
+      #endif
+
+      pixel_addr[2] = red;
+      pixel_addr[1] = green;
+      pixel_addr[0] = blue;
+
+      ((unsigned long *) image -> data)[i] = pixel;
+
+      #ifdef DEBUG
+      fprintf(stderr, " -> 0x%lx\n", pixel);
+      #endif
+    }
+
+    return 1;
+  }
+  else if (image -> bits_per_pixel == 16)
+  {
+    /*
+     * FIXME: Mask doesn't still work for 16 bits.
+     *
+
+    unsigned long addr;
+    register unsigned short *pixels_addr;
+
+    for (i = 0; i < data_size; i++)
+    {
+      addr = ((unsigned long *) image -> data)[i];
+
+      pixels_addr = ((unsigned short *) &addr);
+
+      red   = (pixels_addr[0] & image -> red_mask)   >> 8;
+      green = (pixels_addr[0] & image -> green_mask) >> 3;
+      blue  = (pixels_addr[0] & image -> blue_mask)  << 3;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskInPlaceImage: 16 bits original R [%d] G [%d] B [%d].\n",
+                  red, green, blue);
+      #endif
+
+      MaskPixel(red, green, blue, mask);
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskInPlaceImage: 16 bits masked R [%d] G [%d] B [%d].\n",
+                  red, green, blue);
+      #endif
+
+      pixels_addr[0] = ((red << 8)   & image -> red_mask) |
+                           ((green << 3) & image -> green_mask) |
+                               ((blue >> 3)  & image -> blue_mask);
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskInPlaceImage: 16 bits pixel 0x%x", pixels_addr[0]);
+      #endif
+
+      red   = (pixels_addr[1] & image -> red_mask)   >> 8;
+      green = (pixels_addr[1] & image -> green_mask) >> 3;
+      blue  = (pixels_addr[1] & image -> blue_mask)  << 3;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskInPlaceImage: 16 bits original R [%d] G [%d] B [%d].\n",
+                  red, green, blue);
+      #endif
+
+      MaskPixel(red, green, blue, mask);
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskInPlaceImage: 16 bits masked R [%d] G [%d] B [%d].\n",
+                  red, green, blue);
+      #endif
+
+      pixels_addr[1] = ((red << 8)   & image -> red_mask) |
+                           ((green << 3) & image -> green_mask) |
+                               ((blue >> 3)  & image -> blue_mask);
+
+      #ifdef DEBUG
+      fprintf(stderr, "******MaskInPlaceImage: 16 bits pixel 0x%x", pixels_addr[1]);
+      #endif
+    }
+
+    if (image -> width & 0x00000001)
+    {
+      int card32_per_line;
+      int i;
+
+      card32_per_line = image -> bytes_per_line >> 2;
+
+      for (i = 0; i < image -> height;)
+      {
+        ((CARD32 *) image -> data)[(++i * card32_per_line) - 1] &= 0x0000ffff;
+      }
+    }
+
+    *
+    * End of FIXME.
+    */
+  }
+  else
+  {
+    #ifdef TEST
+    fprintf(stderr, "******MaskImage: PANIC! Cannot apply mask with [%d] bits per pixel.\n",
+                image -> bits_per_pixel);
+    #endif
+
+    return 0;
+  }
+
+  return 1;
+}
+
+static int Pack16To8(unsigned int src_data_size, XImage *src_image, XImage *dst_image)
+{
+  unsigned short *src_pixel = (unsigned short *) src_image -> data;
+  unsigned char  *dst_pixel = (unsigned char *)  dst_image -> data;
+
+  #ifdef DEBUG
+  unsigned int counter = 0;
+  #endif
+
+  while (src_pixel < ((unsigned short *) (src_image -> data + src_data_size)))
+  {
+    #ifdef DEBUG
+    fprintf(stderr, "******PackImage: Pixel [%d] value [0x%x] red [0x%x] green [0x%x] blue [0x%x].\n",
+                counter, *src_pixel, (*src_pixel & 0xc000) >> 8,
+                    ((*src_pixel & 0x600) >> 3), (*src_pixel & 0x18) << 3);
+    #endif
+
+    if (*src_pixel == 0x0)
+    {
+      *dst_pixel = 0x0;
+    }
+    else if (*src_pixel == 0xffff)
+    {
+      *dst_pixel = 0xff;
+    }
+    else
+    {
+      *dst_pixel = ((*src_pixel & 0xc000) >> 10) |
+                        ((*src_pixel & 0x600) >> 7) |
+                             ((*src_pixel & 0x18) >> 3);
+    }
+
+    #ifdef DEBUG
+    fprintf(stderr, "******PackImage: Pixel [%d] destination [0x%x].\n",
+                counter++, *dst_pixel);
+    #endif
+
+    src_pixel++;
+    dst_pixel++;
+  }
+
+  return 1;
+}
+
+static int Pack24To8(unsigned int src_data_size, XImage *src_image, XImage *dst_image)
+{
+  unsigned char *src_pixel = (unsigned char *) src_image -> data;
+  unsigned char *dst_pixel = (unsigned char *) dst_image -> data;
+
+  int i;
+
+  unsigned int bytes_per_line = src_image -> bytes_per_line;
+
+  unsigned char *end_of_line = (unsigned char *) (src_pixel + bytes_per_line);
+
+
+  #ifdef DEBUG
+  unsigned int counter = 0;
+  #endif
+
+  for (i = 0; i < src_image -> height; i++ )
+  {
+    #ifdef DEBUG
+    fprintf(stderr, "******PackImage: Pixel [%d] value [0x%x%x%x] red [0x%x] green [0x%x] blue [0x%x].\n",
+                counter, src_pixel[0], src_pixel[1], src_pixel[2], src_pixel[0] & 0xc0,
+                    src_pixel[1] & 0xc0, src_pixel[2] & 0xc0);
+    #endif
+
+    while(src_pixel < end_of_line - 2)
+    {
+      if (src_pixel[0] == 0x00 &&
+              src_pixel[1] == 0x00 &&
+                  src_pixel[2] == 0x00)
+      {
+        *dst_pixel = 0x0;
+      }
+      else if (src_pixel[0] == 0xff &&
+                   src_pixel[1] == 0xff &&
+                       src_pixel[2] == 0xff)
+      {
+        *dst_pixel = 0xff;
+      }
+      else
+      {
+        /*
+         * Pixel layout:
+         *
+         * 24 bit RRRRR000 GGGGG000 BBBBB000 -> 8 bit 00RRGGBB
+         */
+
+        *dst_pixel = (src_pixel[0] & 0xc0) >> 2 |
+                         ((src_pixel[1] & 0xc0) >> 4) |
+                              ((src_pixel[2] & 0xc0) >> 6);
+      }
+
+      #ifdef DEBUG
+      fprintf(stderr, "******PackImage: Pixel [%d] destination [0x%x].\n",
+                  counter++, *dst_pixel);
+      #endif
+
+      src_pixel += 3;
+      dst_pixel += 1;
+    }
+
+    src_pixel = end_of_line;
+    end_of_line += bytes_per_line;
+  }
+  
+  return 1;
+}
+
+static int Pack24To16(unsigned int src_data_size, XImage *src_image, XImage *dst_image)
+{
+  unsigned char  *src_pixel = (unsigned char  *) src_image -> data;
+  unsigned short *dst_pixel = (unsigned short *) dst_image -> data;
+
+  int i;
+
+  unsigned int bytes_per_line = src_image -> bytes_per_line;
+
+  unsigned char *end_of_line = (unsigned char *) (src_pixel + bytes_per_line);
+
+  #ifdef DEBUG
+  unsigned int counter = 0;
+  #endif
+
+  for (i = 0; i < src_image -> height; i++ )
+  {
+    while(src_pixel < end_of_line - 2)
+    {
+      #ifdef DEBUG
+      fprintf(stderr, "******PackImage: Pixel [%d] value [0x%x%x%x] red [0x%x] green [0x%x] blue [0x%x].\n",
+                  counter, src_pixel[0], src_pixel[1], src_pixel[2], src_pixel[0] & 0xf8,
+                      src_pixel[1] & 0xf8, src_pixel[2] & 0xf8);
+      #endif
+
+      if (src_pixel[0] == 0x00 &&
+              src_pixel[1] == 0x00 &&
+                  src_pixel[2] == 0x00)
+      {
+        *dst_pixel = 0x0;
+      }
+      else if (src_pixel[0] == 0xff &&
+                   src_pixel[1] == 0xff &&
+                       src_pixel[2] == 0xff)
+      {
+        *dst_pixel = 0xffff;
+      }
+      else
+      {
+        /*
+         * Pixel layout:
+         *
+         * 24 bit RRRRR000 GGGGG000 BBBBB000 -> 16 bit 0RRRRRGG GGGBBBBB
+         */
+
+        *dst_pixel = ((src_pixel[0] & 0xf8) << 7) |
+                         ((src_pixel[1] & 0xf8) << 2) |
+                             ((src_pixel[2] & 0xf8) >> 3);
+      }
+
+      #ifdef DEBUG
+      fprintf(stderr, "******PackImage: Pixel [%d] destination [0x%x].\n",
+                  counter++, *dst_pixel);
+      #endif
+
+      src_pixel += 3;
+      dst_pixel += 1;
+    }
+
+    src_pixel = end_of_line;
+    end_of_line += bytes_per_line;
+  }
+
+  return 1;
+}
+
+static int Pack32To8(unsigned int src_data_size, XImage *src_image, XImage *dst_image)
+{
+  unsigned int  *src_pixel = (unsigned int  *) src_image -> data;
+  unsigned char *dst_pixel = (unsigned char *) dst_image -> data;
+
+  #ifdef DEBUG
+  unsigned int counter = 0;
+  #endif
+
+  while (src_pixel < ((unsigned int  *) (src_image -> data + src_data_size)))
+  {
+    #ifdef DEBUG
+    fprintf(stderr, "******PackImage: Pixel [%d] value [0x%x] red [0x%x] green [0x%x] blue [0x%x].\n",
+                counter, *src_pixel, (*src_pixel & 0xc00000),
+                    (*src_pixel & 0xc000), (*src_pixel & 0xc0));
+    #endif
+
+    if (*src_pixel == 0x0)
+    {
+      *dst_pixel = 0x0;
+    }
+    else if (*src_pixel == 0xffffff)
+    {
+      *dst_pixel = 0xff;
+    }
+    else
+    {
+      *dst_pixel = ((*src_pixel & 0xc00000) >> 18) |
+                        ((*src_pixel & 0xc000) >> 12) |
+                             ((*src_pixel & 0xc0) >> 6);
+    }
+
+    #ifdef DEBUG
+    fprintf(stderr, "******PackImage: Pixel [%d] destination [0x%x].\n",
+                counter++, *dst_pixel);
+    #endif
+
+    src_pixel++;
+    dst_pixel++;
+  }
+
+  return 1;
+}
+
+static int Pack32To16(unsigned int src_data_size, XImage *src_image, XImage *dst_image)
+{
+  unsigned int   *src_pixel = (unsigned int  *)  src_image -> data;
+  unsigned short *dst_pixel = (unsigned short *) dst_image -> data;
+
+  #ifdef DEBUG
+  unsigned int counter = 0;
+  #endif
+
+  while (src_pixel < ((unsigned int  *) (src_image -> data + src_data_size)))
+  {
+    #ifdef DEBUG
+    fprintf(stderr, "******PackImage: Pixel [%d] value [0x%x] red [0x%x] green [0x%x] blue [0x%x].\n",
+                counter, *src_pixel, (*src_pixel & 0xf80000),
+                    (*src_pixel & 0xf800), (*src_pixel & 0xf8));
+    #endif
+
+    if (*src_pixel == 0x0)
+    {
+      *dst_pixel = 0x0;
+    }
+    else if (*src_pixel == 0xffffff)
+    {
+      *dst_pixel = 0xffff;
+    }
+    else
+    {
+      *dst_pixel = ((*src_pixel & 0xf80000) >> 9) |
+                        ((*src_pixel & 0xf800) >> 6) |
+                             ((*src_pixel & 0xf8) >> 3);
+    }
+
+    #ifdef DEBUG
+    fprintf(stderr, "******PackImage: Pixel [%d] destination [0x%x].\n",
+                counter++, *dst_pixel);
+    #endif
+
+    src_pixel++;
+    dst_pixel++;
+  }
+
+  return 1;
+}
+
+static int Pack32To24(unsigned int src_data_size, XImage *src_image, XImage *dst_image)
+{
+  unsigned int  *src_pixel = (unsigned int  *) src_image -> data;
+  unsigned char *dst_pixel = (unsigned char *) dst_image -> data;
+
+  #ifdef DEBUG
+  unsigned int counter = 0;
+  #endif
+
+  while (src_pixel < ((unsigned int  *) (src_image -> data + src_data_size)))
+  {
+    #ifdef DEBUG
+    fprintf(stderr, "******PackImage: Pixel [%d] value [0x%x] red [0x%x] green [0x%x] blue [0x%x].\n",
+                counter, *src_pixel, ((*src_pixel & 0xff0000) >> 16),
+                    ((*src_pixel & 0x00ff00) >> 8), (*src_pixel & 0xff));
+    #endif
+
+    if (*src_pixel == 0x0)
+    {
+      dst_pixel[0] = dst_pixel[1] = dst_pixel[2] = 0x0;
+    }
+    else if (*src_pixel == 0xffffff)
+    {
+      dst_pixel[0] = dst_pixel[1] = dst_pixel[2] = 0xff;
+    }
+    else
+    {
+      dst_pixel[0] = (*src_pixel & 0xff0000) >> 16;
+      dst_pixel[1] = (*src_pixel & 0x00ff00) >> 8;
+      dst_pixel[2] = (*src_pixel & 0x0000ff);
+    }
+
+    #ifdef DEBUG
+    fprintf(stderr, "******PackImage: Pixel [%d] destination [0x%x], [0x%x], [0x%x].\n",
+                counter++, dst_pixel[0], dst_pixel[1], dst_pixel[2]);
+    #endif
+
+    src_pixel += 1;
+    dst_pixel += 3;
+  }
+
+  return 1;
+}
+
+int PackImage(unsigned int method, unsigned int src_data_size, XImage *src_image,
+                  unsigned int dst_data_size, XImage *dst_image)
+{
+  unsigned int src_bits_per_pixel;
+  unsigned int dst_bits_per_pixel;
+
+  src_bits_per_pixel = src_image -> bits_per_pixel;
+  dst_bits_per_pixel = MethodBitsPerPixel(method);
+
+  #ifdef TEST
+  fprintf(stderr, "******PackImage: Source bits per pixel [%d], destination bits per pixel [%d].\n",
+              src_bits_per_pixel, dst_bits_per_pixel);
+
+  fprintf(stderr, "******PackImage: Source data size [%d], destination data size [%d].\n",
+              src_data_size, dst_data_size);
+  #endif
+
+  if (dst_bits_per_pixel >= src_bits_per_pixel)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******PackImage: PANIC! Cannot pack image from [%d] to [%d] bytes per pixel.\n",
+                src_bits_per_pixel, dst_bits_per_pixel);
+    #endif
+
+    return 0;
+  }
+
+  switch (src_bits_per_pixel)
+  {
+    case 16:
+    {
+      switch (dst_bits_per_pixel)
+      {
+        case 8:
+        {
+          return Pack16To8(src_data_size, src_image, dst_image);
+        }
+        default:
+        {
+          return 0;
+        }
+      }
+    }
+    case 24:
+    {
+      switch (dst_bits_per_pixel)
+      {
+        case 8:
+        {
+          return Pack24To8(src_data_size, src_image, dst_image);
+        }
+        case 16:
+        {
+          return Pack24To16(src_data_size, src_image, dst_image);
+        }
+        default:
+        {
+          return 0;
+        }
+      }
+    }
+    case 32:
+    {
+      switch (dst_bits_per_pixel)
+      {
+        case 8:
+        {
+          return Pack32To8(src_data_size, src_image, dst_image);
+        }
+        case 16:
+        {
+          return Pack32To16(src_data_size, src_image, dst_image);
+        }
+        case 24:
+        {
+          return Pack32To24(src_data_size, src_image, dst_image);
+        }
+        default:
+        {
+          return 0;
+        }
+      }
+    }
+    default:
+    {
+      return 0;
+    }
+  }
+}
+
+/*
+ * Replace the ffs() call that may be not
+ * present on some systems.
+ */
+
+int FindLSB(int word)
+{
+  int t = word;
+
+  int m = 1;
+  int i = 0;
+
+  for (; i < sizeof(word) << 3; i++, m <<= 1)
+  {
+    if (t & m)
+    {
+      return i + 1;
+    }
+  }
+
+  return 0;
+}
+
diff --git a/nxcompext/Mask.h b/nxcompext/Mask.h
new file mode 100644
index 000000000..5d6024f59
--- /dev/null
+++ b/nxcompext/Mask.h
@@ -0,0 +1,40 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Mask_H
+#define Mask_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "Xlib.h"
+
+extern int MaskImage(const ColorMask *mask, XImage *src_image, XImage *dst_image);
+
+extern int MaskInPlaceImage(const ColorMask *mask, XImage *image);
+
+extern int PackImage(unsigned int method, unsigned int src_data_size, XImage *src_image,
+                         unsigned int dst_data_size, XImage *dst_image);
+
+int FindLSB(int word);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* Mask_H */
diff --git a/nxcompext/NXlib.c b/nxcompext/NXlib.c
new file mode 100644
index 000000000..ed6052f34
--- /dev/null
+++ b/nxcompext/NXlib.c
@@ -0,0 +1,4762 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#include <sys/socket.h>
+
+#ifndef __sun
+#include <strings.h>
+#endif
+
+#include "NX.h"
+
+#include "dix.h"
+#include "os.h"
+
+#define NEED_REPLIES
+
+/*
+ * Needed to enable definition of the callback
+ * functions.
+ */
+
+#define NX_TRANS_SOCKET
+
+#include "Xlib.h"
+#include "Xutil.h"
+#include "Xlibint.h"
+
+#include "NXlib.h"
+#include "NXproto.h"
+#include "NXpack.h"
+
+#include "Clean.h"
+#include "Mask.h"
+#include "Colormap.h"
+#include "Alpha.h"
+#include "Bitmap.h"
+#include "Jpeg.h"
+#include "Pgn.h"
+#include "Rgb.h"
+#include "Rle.h"
+#include "Z.h"
+
+#include "MD5.h"
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+#undef  DUMP
+
+/*
+ * Maximum number of colors allowed in
+ * Png encoding.
+ */
+
+#define NB_COLOR_MAX          256
+
+/*
+ * Dummy error handlers used internally to catch
+ * Xlib failures in replies.
+ */
+
+static int _NXInternalReplyErrorFunction(Display *dpy, XErrorEvent *error);
+
+static void _NXInternalLostSequenceFunction(Display *dpy, unsigned long newseq,
+                                                unsigned long lastseq, unsigned int type);
+
+/*
+ * Resource ids that can be requested by
+ * the client for use in split or unpack
+ * operations.
+ */
+
+static unsigned char _NXSplitResources[NXNumberOfResources];
+static unsigned char _NXUnpackResources[NXNumberOfResources];
+
+static Display *_NXDisplayInitialized = NULL;
+
+/*
+ * Used in asynchronous handling of
+ * GetImage replies.
+ */
+
+typedef struct
+{
+  unsigned long  sequence;
+  unsigned int   resource;
+  unsigned long  mask;
+  int            format;
+  int            width;
+  int            height;
+  _XAsyncHandler *handler;
+  XImage         *image;
+} _NXCollectImageState;
+
+static _NXCollectImageState *_NXCollectedImages[NXNumberOfResources];
+
+/*
+ * Used in asynchronous handling of
+ * GetProperty replies.
+ */
+
+typedef struct
+{
+  unsigned long  sequence;
+  unsigned int   resource;
+  Window         window;
+  Atom           property;
+  Atom           type;
+  int            format;
+  unsigned long  items;
+  unsigned long  after;
+  _XAsyncHandler *handler;
+  char           *data;
+} _NXCollectPropertyState;
+
+static _NXCollectPropertyState *_NXCollectedProperties[NXNumberOfResources];
+
+/*
+ * Used in asynchronous handling of
+ * GrabPointer replies.
+ */
+
+typedef struct
+{
+  unsigned long  sequence;
+  unsigned int   resource;
+  int            status;
+  _XAsyncHandler *handler;
+} _NXCollectGrabPointerState;
+
+static _NXCollectGrabPointerState *_NXCollectedGrabPointers[NXNumberOfResources];
+
+/*
+ * Used in asynchronous handling of
+ * GetInputFocus replies.
+ */
+
+typedef struct
+{
+  unsigned long  sequence;
+  unsigned int   resource;
+  Window         focus;
+  int            revert_to;
+  _XAsyncHandler *handler;
+} _NXCollectInputFocusState;
+
+static _NXCollectInputFocusState *_NXCollectedInputFocuses[NXNumberOfResources];
+
+/*
+ * Used by functions handling cache of
+ * packed images.
+ */
+
+#define MD5_LENGTH            16
+
+typedef struct
+{
+  md5_byte_t   *md5;
+  XImage       *image;
+  unsigned int method;
+} _NXImageCacheEntry;
+
+int NXImageCacheSize = 0;
+int NXImageCacheHits = 0;
+int NXImageCacheOps  = 0;
+
+_NXImageCacheEntry *NXImageCache = NULL;
+
+#ifdef DUMP
+
+void _NXCacheDump(const char *label);
+
+void _NXDumpData(const unsigned char *buffer, unsigned int size);
+
+#endif
+
+/*
+ * From X11/PutImage.c.
+ *
+ * Cancel a GetReq operation, before doing
+ * _XSend or Data.
+ */
+
+#if (defined(__STDC__) && !defined(UNIXCPP)) || defined(ANSICPP)
+#define UnGetReq(name)\
+    dpy->bufptr -= SIZEOF(x##name##Req);\
+    dpy->request--
+#else
+#define UnGetReq(name)\
+    dpy->bufptr -= SIZEOF(x/**/name/**/Req);\
+    dpy->request--
+#endif
+
+#if (defined(__STDC__) && !defined(UNIXCPP)) || defined(ANSICPP)
+#define UnGetEmptyReq()\
+    dpy->bufptr -= 4;\
+    dpy->request--
+#else
+#define UnGetEmptyReq(name)\
+    dpy->bufptr -= 4;\
+    dpy->request--
+#endif
+
+/*
+ * From X11/ImUtil.c.
+ */
+
+extern int _XGetBitsPerPixel(Display *dpy, int depth);
+extern int _XGetScanlinePad(Display *dpy, int depth);
+
+#define ROUNDUP(nbytes, pad) (((nbytes) + ((pad) - 1)) & \
+                                  ~(long)((pad) - 1))
+
+static unsigned int DepthOnes(unsigned long mask)
+{
+  register unsigned long y;
+
+  y = (mask >> 1) &033333333333;
+  y = mask - y - ((y >>1) & 033333333333);
+  return ((unsigned int) (((y + (y >> 3)) &
+              030707070707) % 077));
+}
+
+#define CanMaskImage(image, mask) \
+\
+(image -> format == ZPixmap && mask != NULL && \
+    (image -> depth == 32 || image -> depth == 24 || \
+        (image -> depth == 16 && (image -> red_mask == 0xf800 && \
+            image -> green_mask == 0x7e0 && image -> blue_mask == 0x1f))))
+
+#define ShouldMaskImage(image, mask) (mask -> color_mask != 0xff)
+
+/*
+ * Initialize and reset the internal structures.
+ */
+
+extern int _NXInternalInitResources(Display *dpy);
+extern int _NXInternalResetResources(Display *dpy);
+extern int _NXInternalInitEncoders(Display *dpy);
+extern int _NXInternalResetEncoders(Display *dpy);
+
+int NXInitDisplay(Display *dpy)
+{
+  #ifdef TEST
+  fprintf(stderr, "******NXInitDisplay: Called for display at [%p].\n", (void *) dpy);
+  #endif
+
+  if (_NXDisplayInitialized == NULL)
+  {
+    _NXInternalInitResources(dpy);
+
+    _NXInternalInitEncoders(dpy);
+
+    _NXDisplayInitialized = dpy;
+
+    return 1;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******NXInitDisplay: WARNING! Internal structures already initialized.\n");
+  #endif
+
+  return 0;
+}
+
+int NXResetDisplay(Display *dpy)
+{
+  #ifdef TEST
+  fprintf(stderr, "******NXResetDisplay: Called for display at [%p].\n", (void *) dpy);
+  #endif
+
+  if (_NXDisplayInitialized != NULL)
+  {
+    _NXInternalResetResources(dpy);
+
+    _NXInternalResetEncoders(dpy);
+
+    _NXDisplayInitialized = NULL;
+
+    return 1;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******NXResetDisplay: WARNING! Internal structures already reset.\n");
+  #endif
+
+  return 0;
+}
+
+int _NXInternalInitResources(Display *dpy)
+{
+  return _NXInternalResetResources(dpy);
+}
+
+int _NXInternalResetResources(Display *dpy)
+{
+  int i;
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXInternalResetResources: Clearing all the internal structures.\n");
+  #endif
+
+  for (i = 0; i < NXNumberOfResources; i++)
+  {
+    _NXSplitResources[i]  = 0;
+    _NXUnpackResources[i] = 0;
+
+    if (_NXCollectedImages[i] != NULL)
+    {
+      #ifdef TEST
+      fprintf(stderr, "******_NXInternalResetResources: WARNING! Clearing collect image data "
+                  "for resource [%d].\n", i);
+      #endif
+
+      if (_NXCollectedImages[i] -> handler != NULL)
+      {
+        DeqAsyncHandler(dpy, _NXCollectedImages[i] -> handler);
+
+        Xfree(_NXCollectedImages[i] -> handler);
+      }
+
+      if (_NXCollectedImages[i] -> image != NULL)
+      {
+        XDestroyImage(_NXCollectedImages[i] -> image);
+      }
+
+      Xfree(_NXCollectedImages[i]);
+
+      _NXCollectedImages[i] = NULL;
+    }
+
+    if (_NXCollectedProperties[i] != NULL)
+    {
+      #ifdef TEST
+      fprintf(stderr, "******_NXInternalResetResources: WARNING! Clearing collect property data "
+                  "for resource [%d].\n", i);
+      #endif
+
+      if (_NXCollectedProperties[i] -> handler != NULL)
+      {
+        DeqAsyncHandler(dpy, _NXCollectedProperties[i] -> handler);
+
+        Xfree(_NXCollectedProperties[i] -> handler);
+      }
+
+      if (_NXCollectedProperties[i] -> data != NULL)
+      {
+        Xfree(_NXCollectedProperties[i] -> data);
+      }
+
+      Xfree(_NXCollectedProperties[i]);
+
+      _NXCollectedProperties[i] = NULL;
+    }
+
+    if (_NXCollectedGrabPointers[i] != NULL)
+    {
+      #ifdef TEST
+      fprintf(stderr, "******_NXInternalResetResources: WARNING! Clearing grab pointer data "
+                  "for resource [%d].\n", i);
+      #endif
+
+      if (_NXCollectedGrabPointers[i] -> handler != NULL)
+      {
+        DeqAsyncHandler(dpy, _NXCollectedGrabPointers[i] -> handler);
+
+        Xfree(_NXCollectedGrabPointers[i] -> handler);
+      }
+
+      Xfree(_NXCollectedGrabPointers[i]);
+
+      _NXCollectedGrabPointers[i] = NULL;
+    }
+
+    if (_NXCollectedInputFocuses[i] != NULL)
+    {
+      #ifdef TEST
+      fprintf(stderr, "******_NXInternalResetResources: WARNING! Clearing collect input focus data "
+                  "for resource [%d].\n", i);
+      #endif
+
+      if (_NXCollectedInputFocuses[i] -> handler != NULL)
+      {
+        DeqAsyncHandler(dpy, _NXCollectedInputFocuses[i] -> handler);
+
+        Xfree(_NXCollectedInputFocuses[i] -> handler);
+      }
+
+      Xfree(_NXCollectedInputFocuses[i]);
+
+      _NXCollectedInputFocuses[i] = NULL;
+    }
+  }
+
+  return 1;
+}
+
+int _NXInternalInitEncoders(Display *dpy)
+{
+  ZInitEncoder();
+
+  return 1;
+}
+
+int _NXInternalResetEncoders(Display *dpy)
+{
+  ZResetEncoder();
+
+  return 1;
+}
+
+int NXSetDisplayPolicy(Display *dpy, int policy)
+{
+  if (policy == NXPolicyImmediate)
+  {
+    return NXTransPolicy(NX_FD_ANY, NX_POLICY_IMMEDIATE);
+  }
+  else
+  {
+    return NXTransPolicy(NX_FD_ANY, NX_POLICY_DEFERRED);
+  }
+}
+
+int NXSetDisplayBuffer(Display *dpy, int size)
+{
+  /*
+   * This is not multi-thread safe, so,
+   * if you have threads, be sure that
+   * they are stopped.
+   */
+
+  char *buffer;
+
+  XFlush(dpy);
+
+  if (dpy -> bufmax - size == dpy -> buffer)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******NXSetDisplayBuffer: Nothing to do with buffer size matching.\n");
+    #endif
+
+    return 1;
+  }
+  else if (dpy -> bufptr != dpy -> buffer)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXSetDisplayBuffer: PANIC! The display buffer is not empty.\n");
+    #endif
+
+    return -1;
+  }
+  else if ((buffer = Xcalloc(1, size)) == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXSetDisplayBuffer: PANIC! Can't allocate [%d] bytes for the buffer.\n",
+                size);
+    #endif
+
+    return -1;
+  }
+
+  if (dpy -> buffer != NULL)
+  {
+    Xfree(dpy -> buffer);
+  }
+
+  dpy -> buffer = buffer;
+  dpy -> bufptr = dpy -> buffer;
+  dpy -> bufmax = dpy -> bufptr + size;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXSetDisplayBuffer: Set the display output buffer size to [%d].\n",
+              size);
+  #endif
+
+  return 1;
+}
+
+/*
+ * If set, the Popen() function in the X server
+ * wil remove the LD_LIBRARY_PATH variable from
+ * the environment before calling the execl()
+ * function on the child process.
+ */
+
+int NXUnsetLibraryPath(int value)
+{
+  int previous = _NXUnsetLibraryPath;
+
+  _NXUnsetLibraryPath = value;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXUnsetLibraryPath: Set the flag to [%d] with previous value [%d].\n",
+              value, previous);
+  #endif
+
+  return previous;
+}
+
+/*
+ * If set, the Xlib I/O error handler will simply
+ * return, instead of quitting the program. This
+ * leaves to the application the responsibility
+ * of checking the state of the XlibDisplayIOEr-
+ * ror flag.
+ */
+
+int NXHandleDisplayError(int value)
+{
+  int previous = _NXHandleDisplayError;
+
+  _NXHandleDisplayError = value;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXHandleDisplayError: Set the flag to [%d] with previous value [%d].\n",
+              value, previous);
+  #endif
+
+  return previous;
+}
+
+/*
+ * Shutdown the display descriptor and force Xlib
+ * to set the I/O error flag.
+ */
+
+Bool NXForceDisplayError(Display *dpy)
+{
+  if (dpy != NULL)
+  {
+    NXTransClose(dpy -> fd);
+
+    if (!(dpy -> flags & XlibDisplayIOError))
+    {
+      shutdown(dpy -> fd, SHUT_RDWR);
+
+      _XIOError(dpy);
+    }
+
+    return 1;
+  }
+
+  return 0;
+}
+
+/*
+ * Check if the display has become invalid. Similarly
+ * to the modified Xlib, we call the predicate funct-
+ * ion with the value of the XlibDisplayIOError flag
+ * only if the I/O error was not encountered already.
+ * The application can use this function to query the
+ * XlibDisplayIOError flag because Xlib doesn't expose
+ * the internals of the display structure to the appli-
+ * cation.
+ */
+
+int NXDisplayError(Display *dpy)
+{
+  if (dpy != NULL)
+  {
+    return (_XGetIOError(dpy) ||
+                (_NXDisplayErrorFunction != NULL &&
+                    (*_NXDisplayErrorFunction)(dpy, _XGetIOError(dpy))));
+  }
+
+  return 1;
+}
+
+/*
+ * Various queries related to the state of the
+ * display connection.
+ */
+
+int NXDisplayReadable(Display *dpy)
+{
+  int result;
+  int readable;
+
+  result = NXTransReadable(dpy -> fd, &readable);
+
+  if (result == 0)
+  {
+    #ifdef DEBUG
+    fprintf(stderr, "******NXDisplayReadable: Returning [%d] bytes readable from fd [%d].\n",
+                readable, dpy -> fd);
+    #endif
+
+    return readable;
+  }
+
+  #ifdef DEBUG
+  fprintf(stderr, "******NXDisplayReadable: WARNING! Error detected on display fd [%d].\n",
+              dpy -> fd);
+  #endif
+
+  return -1;
+}
+
+int NXDisplayFlushable(Display *dpy)
+{
+  #ifdef DEBUG
+
+  int flushable;
+
+  flushable = NXTransFlushable(dpy -> fd) +
+                  (dpy -> bufptr - dpy -> buffer);
+
+  fprintf(stderr, "******NXDisplayFlushable: Returning [%d+%d=%d] bytes flushable "
+              "to fd [%d].\n", (int) (dpy -> bufptr - dpy -> buffer),
+                  (int) (flushable - (dpy -> bufptr - dpy -> buffer)),
+                      flushable, dpy -> fd);
+
+  return flushable;
+
+  #else
+
+  return NXTransFlushable(dpy -> fd) + (dpy -> bufptr - dpy -> buffer);
+
+  #endif
+}
+
+int NXDisplayCongestion(Display *dpy)
+{
+  #ifdef DEBUG
+
+  int congestion = NXTransCongestion(dpy -> fd);
+
+  fprintf(stderr, "******NXDisplayCongestion: Returning [%d] as congestion level for fd [%d].\n",
+              congestion, dpy -> fd);
+
+  return congestion;
+
+  #else
+
+  return NXTransCongestion(dpy -> fd);
+
+  #endif
+}
+
+int NXFlushDisplay(Display *dpy, int what)
+{
+  if (!(dpy -> flags & XlibDisplayWriting) &&
+          dpy -> bufptr - dpy -> buffer > 0)
+  {
+    #ifdef DEBUG
+    fprintf(stderr, "******NXFlushDisplay: Writing with [%d] bytes in the buffer.\n",
+            (int) (dpy -> bufptr - dpy -> buffer));
+    #endif
+
+    XFlush(dpy);
+  }
+
+  if (what == NXFlushBuffer)
+  {
+    return 0;
+  }
+
+  #ifdef DEBUG
+  fprintf(stderr, "******NXFlushDisplay: Flushing with [%d] bytes in the NX transport.\n",
+              NXDisplayFlushable(dpy));
+  #endif
+
+  return NXTransFlush(dpy -> fd);
+}
+
+NXDisplayErrorPredicate NXSetDisplayErrorPredicate(NXDisplayErrorPredicate predicate)
+{
+  NXDisplayErrorPredicate previous = _NXDisplayErrorFunction;
+
+  _NXDisplayErrorFunction = predicate;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXSetDisplayErrorPredicate: Set the predicate to [%p] with previous value [%p].\n",
+              predicate, previous);
+  #endif
+
+  return previous;
+}
+
+NXDisplayBlockHandler NXSetDisplayBlockHandler(NXDisplayBlockHandler handler)
+{
+  NXDisplayBlockHandler previous = _NXDisplayBlockFunction;
+
+  _NXDisplayBlockFunction = handler;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXSetDisplayBlockHandler: Set the handler to [%p] with previous value [%p].\n",
+              handler, previous);
+  #endif
+
+  return previous;
+}
+
+NXDisplayWriteHandler NXSetDisplayWriteHandler(NXDisplayWriteHandler handler)
+{
+  NXDisplayWriteHandler previous = _NXDisplayWriteFunction;
+
+  _NXDisplayWriteFunction = handler;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXSetDisplayWriteHandler: Set the handler to [%p] with previous value [%p].\n",
+              handler, previous);
+  #endif
+
+  return previous;
+}
+
+NXDisplayFlushHandler NXSetDisplayFlushHandler(NXDisplayFlushHandler handler, Display *display)
+{
+  NXDisplayFlushHandler previous = _NXDisplayFlushFunction;
+
+  _NXDisplayFlushFunction = handler;
+
+  NXTransHandler(NX_FD_ANY, NX_HANDLER_FLUSH,
+                     (void (*)(void *, int)) handler, (void *) display);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXSetDisplayFlushHandler: Set the handler to [%p] with display [%p] "
+              "and previous value [%p].\n", handler, display, previous);
+  #endif
+
+  return previous;
+}
+
+NXDisplayStatisticsHandler NXSetDisplayStatisticsHandler(NXDisplayStatisticsHandler handler, char **buffer)
+{
+  NXDisplayStatisticsHandler previous = _NXDisplayStatisticsFunction;
+
+  _NXDisplayStatisticsFunction = handler;
+
+  /*
+   * Propagate the handler.
+   */
+
+  NXTransHandler(NX_FD_ANY, NX_HANDLER_STATISTICS,
+                     (void (*)(void *, int)) handler, (void *) buffer);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXSetDisplayStatisticsHandler: Set the handler to [%p] with buffer pointer [%p] "
+              "and previous value [%p].\n", handler, buffer, previous);
+  #endif
+
+  return previous;
+}
+
+NXLostSequenceHandler NXSetLostSequenceHandler(NXLostSequenceHandler handler)
+{
+  NXLostSequenceHandler previous = _NXLostSequenceFunction;
+
+  _NXLostSequenceFunction = handler;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXSetLostSequenceHandler: Set the handler to [%p] with previous value [%p].\n",
+              handler, previous);
+  #endif
+
+  return previous;
+}
+
+int _NXInternalReplyErrorFunction(Display *dpy, XErrorEvent *error)
+{
+  #ifdef TEST
+  fprintf(stderr, "******_NXInternalReplyErrorFunction: Internal error handler called.\n");
+  #endif
+
+  return 0;
+}
+
+void _NXInternalLostSequenceFunction(Display *dpy, unsigned long newseq,
+                                         unsigned long lastseq, unsigned int type)
+{
+  #ifdef TEST
+
+  fprintf(stderr, "******_NXInternalLostSequenceFunction: WARNING! Sequence lost with new "
+              "sequence %ld last request %ld.\n", newseq, dpy -> request);
+
+  /*
+   * TODO: Reply or event info must be implemented.
+   *
+   * fprintf(stderr, "******_NXInternalLostSequenceFunction: WARNING! Expected event or reply "
+   *             "was %ld with sequence %ld.\n", (long) rep -> type, (long) rep -> sequenceNumber);
+   */
+
+  fprintf(stderr, "******_NXInternalLostSequenceFunction: WARNING! Last sequence read "
+              "was %ld display request is %ld.\n", lastseq & 0xffff, dpy -> request & 0xffff);
+
+  #endif
+}
+
+Status NXGetControlParameters(Display *dpy, unsigned int *link_type, unsigned int *local_major,
+                                  unsigned int *local_minor, unsigned int *local_patch,
+                                      unsigned int *remote_major, unsigned int *remote_minor,
+                                          unsigned int *remote_patch, int *split_timeout, int *motion_timeout,
+                                              int *split_mode, int *split_size, unsigned int *pack_method,
+                                                  unsigned int *pack_quality, int *data_level, int *stream_level,
+                                                      int *delta_level, unsigned int *load_cache,
+                                                          unsigned int *save_cache, unsigned int *startup_cache)
+{
+  xNXGetControlParametersReply rep;
+
+  register xReq *req;
+
+  LockDisplay(dpy);
+
+  GetEmptyReq(NXGetControlParameters, req);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXGetControlParameters: Sending message opcode [%d].\n",
+              X_NXGetControlParameters);
+  #endif
+
+  if (_XReply(dpy, (xReply *) &rep, 0, xTrue) == xFalse)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******NXGetControlParameters: Error receiving reply.\n");
+    #endif
+
+    UnlockDisplay(dpy);
+
+    SyncHandle();
+
+    return 0;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******NXGetControlParameters: Got reply with link type [%u].\n", rep.linkType);
+
+  fprintf(stderr, "******NXGetControlParameters: Local protocol major [%u] minor [%u] patch [%u].\n",
+              rep.localMajor, rep.localMinor, rep.localPatch);
+
+  fprintf(stderr, "******NXGetControlParameters: Remote protocol major [%u] minor [%u] patch [%u].\n",
+              rep.remoteMajor, rep.remoteMinor, rep.remotePatch);
+
+  fprintf(stderr, "******NXGetControlParameters: Split timeout [%d] motion timeout [%d].\n",
+              (int) rep.splitTimeout, (int) rep.motionTimeout);
+
+  fprintf(stderr, "******NXGetControlParameters: Split mode [%d] split size [%d].\n",
+              (int) rep.splitMode, (int) rep.splitSize);
+
+  fprintf(stderr, "******NXGetControlParameters: Preferred pack method [%d] pack quality [%d].\n",
+              (int) rep.packMethod, (int) rep.packQuality);
+
+  fprintf(stderr, "******NXGetControlParameters: Data level [%d] stream level [%d] delta level [%d].\n",
+              rep.dataLevel, rep.streamLevel, rep.deltaLevel);
+  #endif
+
+  *link_type = rep.linkType;
+
+  *local_major = rep.localMajor;
+  *local_minor = rep.localMinor;
+  *local_patch = rep.localPatch;
+
+  *remote_major = rep.remoteMajor;
+  *remote_minor = rep.remoteMinor;
+  *remote_patch = rep.remotePatch;
+
+  *split_timeout  = rep.splitTimeout;
+  *motion_timeout = rep.motionTimeout;
+
+  *split_mode = rep.splitMode;
+  *split_size = rep.splitSize;
+
+  *pack_method  = rep.packMethod;
+  *pack_quality = rep.packQuality;
+
+  *data_level   = rep.dataLevel;
+  *stream_level = rep.streamLevel;
+  *delta_level  = rep.deltaLevel;
+
+  *load_cache    = rep.loadCache;
+  *save_cache    = rep.saveCache;
+  *startup_cache = rep.startupCache;
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  /*
+   * Install our internal out-of-sync handler.
+   */
+
+  _NXLostSequenceFunction = _NXInternalLostSequenceFunction;
+
+  return 1;
+}
+
+/*
+ * Which unpack methods are supported by the
+ * remote proxy?
+ */
+
+Status NXGetUnpackParameters(Display *dpy, unsigned int *entries, unsigned char supported_methods[])
+{
+  register xNXGetUnpackParametersReq *req;
+
+  xNXGetUnpackParametersReply rep;
+
+  register unsigned n;
+
+  #ifdef TEST
+  register unsigned i;
+  #endif
+
+  if (*entries < NXNumberOfPackMethods)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******NXGetUnpackParameters: Requested only [%d] entries while they should be [%d].\n",
+                *entries, NXNumberOfPackMethods);
+    #endif
+
+    return 0;
+  }
+
+  LockDisplay(dpy);
+
+  GetReq(NXGetUnpackParameters, req);
+
+  req -> entries = *entries;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXGetUnpackParameters: Sending message opcode [%d] with [%d] requested entries.\n",
+              X_NXGetUnpackParameters, *entries);
+  #endif
+
+  if (_XReply(dpy, (xReply *) &rep, 0, xFalse) == xFalse || rep.length == 0)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******NXGetUnpackParameters: Error receiving reply.\n");
+    #endif
+
+    UnlockDisplay(dpy);
+
+    SyncHandle();
+
+    return 0;
+  }
+
+  if ((n = rep.length << 2) > *entries)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******NXGetUnpackParameters: Got [%d] bytes of reply data while they should be [%d].\n",
+                n, *entries);
+    #endif
+
+    _XEatData(dpy, (unsigned long) n);
+
+    UnlockDisplay(dpy);
+
+    SyncHandle();
+
+    return 0;
+  }
+
+  *entries = n;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXGetUnpackParameters: Reading [%d] bytes of reply data.\n", n);
+  #endif
+
+  _XReadPad(dpy, (char *) supported_methods, n);
+
+  #ifdef TEST
+
+  fprintf(stderr, "******NXGetUnpackParameters: Got reply with methods: ");
+
+  for (i = 0; i < n; i++)
+  {
+    if (supported_methods[i] != 0)
+    {
+      fprintf(stderr, "[%d]", i);
+    }
+  }
+  
+  fprintf(stderr, ".\n");
+
+  #endif
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+/*
+ * Query and enable the MIT-SHM support between the
+ * proxy and the X server. The 'enable' flags must be
+ * true if shared memory PutImages and PutPackedImages
+ * are desired. On return the flags will say if support
+ * has been successfully enabled.
+ *
+ * Note that the the client part is not useful and not
+ * implemented. The size of the segment is chosen by
+ * the proxy. The main purpose of the message is to
+ * reserve the XID that will be used by the remote.
+ */
+
+Status NXGetShmemParameters(Display *dpy, unsigned int *enable_client,
+                                unsigned int *enable_server, unsigned int *client_segment,
+                                    unsigned int *server_segment, unsigned int *client_size,
+                                        unsigned int *server_size)
+{
+  register xNXGetShmemParametersReq *req;
+
+  register int stage;
+
+  xNXGetShmemParametersReply rep;
+
+  /*
+   * Save the previous handler.
+   */
+
+  int (*handler)(Display *, XErrorEvent *) = _XErrorFunction;
+
+  *client_segment = 0;
+  *server_segment = 0;
+
+  if (*enable_client)
+  {
+    *client_segment = XAllocID(dpy);
+  }
+
+  if (*enable_server)
+  {
+    *server_segment = XAllocID(dpy);
+  }
+
+  LockDisplay(dpy);
+
+  _XErrorFunction = _NXInternalReplyErrorFunction;
+
+  for (stage = 0; stage < 3; stage++)
+  {
+    GetReq(NXGetShmemParameters, req);
+
+    req -> stage = stage;
+
+    req -> enableClient = (*enable_client != 0 ? 1 : 0);
+    req -> enableServer = (*enable_server != 0 ? 1 : 0);
+
+    req -> clientSegment = *client_segment;
+    req -> serverSegment = *server_segment;
+
+    #ifdef TEST
+    fprintf(stderr, "******NXGetShmemParameters: Sending message opcode [%d] at stage [%d].\n",
+                X_NXGetShmemParameters, stage);
+    #endif
+
+    #ifdef TEST
+
+    if (stage == 0)
+    {
+      fprintf(stderr, "******NXGetShmemParameters: Enable client is [%u] enable server is [%u].\n",
+                  *enable_client, *enable_server);
+
+      fprintf(stderr, "******NXGetShmemParameters: Client segment is [%u] server segment is [%u].\n",
+                  *client_segment, *server_segment);
+    }
+
+    #endif
+
+    /*
+     * There isn't X server reply in the second stage.
+     * The procedure followed at X server side is:
+     *
+     * Stage 0: Send X_QueryExtension and masquerade
+     *          the reply.
+     *
+     * Stage 1: Allocate the shared memory and send
+     *          X_ShmAttach to the X server.
+     *
+     * Stage 2: Send X_GetInputFocus and masquerade
+     *          the reply.
+     *
+     * The last message is used to force a reply and
+     * collect any X error caused by a failure in the
+     * shared memory initialization.
+     */
+
+    if (stage != 1)
+    {
+      /*
+       * We are only interested in the final reply.
+       */
+
+      if (_XReply(dpy, (xReply *) &rep, 0, xTrue) == xFalse)
+      {
+        #ifdef TEST
+        fprintf(stderr, "******NXGetShmemParameters: Error receiving reply.\n");
+        #endif
+
+        _XErrorFunction = handler;
+
+        UnlockDisplay(dpy);
+
+        SyncHandle();
+
+        return 0;
+      }
+    }
+  }
+
+  /*
+   * Return the settings to client.
+   */
+
+  *enable_client = rep.clientEnabled;
+  *enable_server = rep.serverEnabled;
+
+  *client_size = rep.clientSize;
+  *server_size = rep.serverSize;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXGetShmemParameters: Got final reply with enabled client [%u] and server [%u].\n",
+              *enable_client, *enable_server);
+
+  fprintf(stderr, "******NXGetShmemParameters: Client segment size [%u] server segment size [%u].\n",
+              *client_size, *server_size);
+  #endif
+
+  _XErrorFunction = handler;
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+/*
+ * Get the path to the font server that can be used by the X
+ * server to tunnel the font connections across the NX link.
+ * The path actually represents the TCP port where the proxy
+ * on the NX client side is listening. The agent can tempora-
+ * rily enable the tunneling when it needs a font that is not
+ * available on the client, for example when the session is
+ * migrated from a different X server.
+ *
+ * Note that it is not advisable to use the font server chan-
+ * nel for other purposes than restoring a font that is found
+ * missing at the time the session is migrated to a different
+ * display. This is because the agent implements a caching of
+ * the list of fonts supported by the client as it needs to
+ * advertise only the fonts that can be opened at both sides.
+ */
+
+Status NXGetFontParameters(Display *dpy, unsigned int path_length, char path_data[])
+{
+  register xNXGetFontParametersReq *req;
+
+  xNXGetFontParametersReply rep;
+
+  register unsigned n;
+
+  #ifdef TEST
+  register unsigned i;
+  #endif
+
+  if (path_length < 1)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******NXGetFontParameters: No room to store the reply.\n");
+    #endif
+
+    return 0;
+  }
+
+  *path_data = '\0';
+
+  LockDisplay(dpy);
+
+  GetReq(NXGetFontParameters, req);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXGetFontParameters: Sending message opcode [%d].\n",
+              X_NXGetFontParameters);
+  #endif
+
+  if (_XReply(dpy, (xReply *) &rep, 0, xFalse) == xFalse || rep.length == 0)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******NXGetFontParameters: Error receiving reply.\n");
+    #endif
+
+    UnlockDisplay(dpy);
+
+    SyncHandle();
+
+    return 0;
+  }
+
+  if ((n = rep.length << 2) > path_length)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******NXGetFontParameters: Got [%d] bytes of reply data with only room for [%d].\n",
+                n, path_length);
+    #endif
+
+    _XEatData(dpy, (unsigned long) n);
+
+    UnlockDisplay(dpy);
+
+    SyncHandle();
+
+    return 0;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******NXGetFontParameters: Reading [%d] bytes of reply data.\n", n);
+  #endif
+
+  _XReadPad(dpy, (char *) path_data, n);
+
+  /*
+   * Check if the string can be fully
+   * contained by the buffer.
+   */
+
+  if (*path_data > path_length - 1)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******NXGetFontParameters: Inconsistent length in the returned string.\n");
+    #endif
+
+    UnlockDisplay(dpy);
+
+    SyncHandle();
+
+    return 0;
+  }
+
+  #ifdef TEST
+
+  fprintf(stderr, "******NXGetFontParameters: Got font path of [%d] bytes and value [",
+              (int) *path_data);
+
+  for (i = 0; i < *path_data; i++)
+  {
+    fprintf(stderr, "%c", *(path_data + i + 1));
+  }
+  
+  fprintf(stderr, "].\n");
+
+  #endif
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+unsigned int NXAllocSplit(Display *dpy, unsigned int resource)
+{
+  if (resource == NXAnyResource)
+  {
+    for (resource = 0; resource < NXNumberOfResources; resource++)
+    {
+      if (_NXSplitResources[resource] == 0)
+      {
+        _NXSplitResources[resource] = 1;
+
+        #ifdef TEST
+        fprintf(stderr, "******NXAllocSplit: Reserved resource [%u].\n",
+                    resource);
+        #endif
+    
+        return resource;
+      }
+    }
+
+    #ifdef TEST
+    fprintf(stderr, "******NXAllocSplit: WARNING! Resource limit exausted.\n");
+    #endif
+
+    return NXNoResource;
+  }
+  else if (resource >= 0 && resource < NXNumberOfResources)
+  {
+    #ifdef TEST
+
+    if (_NXSplitResources[resource] == 0)
+    {
+      fprintf(stderr, "******NXAllocSplit: Reserved requested resource [%u].\n",
+                  resource);
+    }
+    else
+    {
+      fprintf(stderr, "******NXAllocSplit: Requested resource [%u] already reserved.\n",
+                  resource);
+    }
+
+    #endif
+    
+    _NXSplitResources[resource] = 1;
+  }
+
+  #ifdef PANIC
+  fprintf(stderr, "******NXAllocSplit: PANIC! Can't reserve requested resource [%u].\n",
+              resource);
+  #endif
+
+  return NXNoResource;
+}
+
+/*
+ * Tell the proxy to split the next messages.
+ */
+
+int NXStartSplit(Display *dpy, unsigned int resource, unsigned int mode)
+{
+  register xNXStartSplitReq *req;
+
+  LockDisplay(dpy);
+
+  GetReq(NXStartSplit, req);
+
+  req -> resource = resource;
+  req -> mode     = mode;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXStartSplit: Sending opcode [%d] with resource [%d] mode [%d].\n",
+              X_NXStartSplit, resource, mode);
+  #endif
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+/*
+ * Send the closure of the split sequence and
+ * tell the proxy to send the results.
+ */
+
+int NXEndSplit(Display *dpy, unsigned int resource)
+{
+  register xNXEndSplitReq *req;
+
+  LockDisplay(dpy);
+
+  GetReq(NXEndSplit, req);
+
+  req -> resource = resource;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXEndSplit: Sending opcode [%d] with resource [%d].\n",
+              X_NXStartSplit, resource);
+  #endif
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+/*
+ * This message must be sent whenever the proxy notifies
+ * the client of the completion of a split. If the 'pro-
+ * pagate' field is 0, the proxy will not send the ori-
+ * ginal request to the X server, but will only free the
+ * internal state.
+ */
+
+int NXCommitSplit(Display *dpy, unsigned int resource, unsigned int propagate,
+                      unsigned char request, unsigned int position)
+{
+  register xNXCommitSplitReq *req;
+
+  LockDisplay(dpy);
+
+  GetReq(NXCommitSplit, req);
+
+  req -> resource  = resource;
+  req -> propagate = propagate;
+  req -> request   = request;
+  req -> position  = position;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXCommitSplit: Sending opcode [%d] with resource [%d] propagate [%d] "
+              "request [%d] position [%d].\n", X_NXCommitSplit, resource,
+                  propagate, request, position);
+  #endif
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+int NXAbortSplit(Display *dpy, unsigned int resource)
+{
+  register xNXAbortSplitReq *req;
+
+  LockDisplay(dpy);
+
+  GetReq(NXAbortSplit, req);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXAbortSplit: Sending message opcode [%d] with resource [%u].\n",
+              X_NXAbortSplit, resource);
+  #endif
+
+  req -> resource = resource;
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+int NXFinishSplit(Display *dpy, unsigned int resource)
+{
+  register xNXFinishSplitReq *req;
+
+  LockDisplay(dpy);
+
+  GetReq(NXFinishSplit, req);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXFinishSplit: Sending message opcode [%d] with resource [%u].\n",
+              X_NXFinishSplit, resource);
+  #endif
+
+  req -> resource = resource;
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+int NXFreeSplit(Display *dpy, unsigned int resource)
+{
+  register xNXFreeSplitReq *req;
+
+  if (_NXSplitResources[resource] != 0)
+  {
+    LockDisplay(dpy);
+
+    GetReq(NXFreeSplit, req);
+
+    #ifdef TEST
+    fprintf(stderr, "******NXFreeSplit: Sending message opcode [%d] with resource [%u].\n",
+                X_NXFreeSplit, resource);
+    #endif
+
+    req -> resource = resource;
+
+    UnlockDisplay(dpy);
+
+    SyncHandle();
+
+    #ifdef TEST
+    fprintf(stderr, "******NXFreeSplit: Making the resource [%u] newly available.\n",
+                resource);
+    #endif
+
+    _NXSplitResources[resource] = 0;
+  }
+  #ifdef TEST
+  else
+  {
+    fprintf(stderr, "******NXFreeSplit: Nothing to do for resource [%u].\n",
+                resource);
+  }
+  #endif
+
+  return 1;
+}
+
+/*
+ * Tell to remote proxy to discard expose events
+ * of one or more types.
+ */
+
+int NXSetExposeParameters(Display *dpy, int expose, int graphics_expose, int no_expose)
+{
+  register xNXSetExposeParametersReq *req;
+
+  LockDisplay(dpy);
+
+  GetReq(NXSetExposeParameters, req);
+
+  req -> expose         = expose;
+  req -> graphicsExpose = graphics_expose;
+  req -> noExpose       = no_expose;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXSetExposeParameters: Sending message opcode [%d] with flags [%d][%d][%d].\n",
+              X_NXSetExposeParameters, req -> expose, req -> graphicsExpose, req -> noExpose);
+  #endif
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+/*
+ * Tell to the local proxy how to handle the next requests.
+ */
+
+int NXSetCacheParameters(Display *dpy, int enable_cache, int enable_split,
+                             int enable_save, int enable_load)
+{
+  register xNXSetCacheParametersReq *req;
+
+  LockDisplay(dpy);
+
+  GetReq(NXSetCacheParameters, req);
+
+  req -> enableCache = enable_cache;
+  req -> enableSplit = enable_split;
+  req -> enableSave  = enable_save;
+  req -> enableLoad  = enable_load;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXSetCacheParameters: Sending message opcode [%d] with "
+              "flags [%d][%d][%d][%d].\n", X_NXSetCacheParameters, req -> enableCache,
+                  req -> enableSplit, req -> enableSave, req -> enableLoad);
+  #endif
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+unsigned int NXAllocUnpack(Display *dpy, unsigned int resource)
+{
+  if (resource == NXAnyResource)
+  {
+    for (resource = 0; resource < NXNumberOfResources; resource++)
+    {
+      if (_NXUnpackResources[resource] == 0)
+      {
+        _NXUnpackResources[resource] = 1;
+
+        #ifdef TEST
+        fprintf(stderr, "******NXAllocUnpack: Reserved resource [%u].\n",
+                    resource);
+        #endif
+    
+        return resource;
+      }
+    }
+
+    #ifdef TEST
+    fprintf(stderr, "******NXAllocUnpack: WARNING! Resource limit exausted.\n");
+    #endif
+
+    return NXNoResource;
+  }
+  else if (resource >= 0 && resource < NXNumberOfResources)
+  {
+    #ifdef TEST
+
+    if (_NXUnpackResources[resource] == 0)
+    {
+      fprintf(stderr, "******NXAllocUnpack: Reserved requested resource [%u].\n",
+                  resource);
+    }
+    else
+    {
+      fprintf(stderr, "******NXAllocUnpack: Requested resource [%u] already reserved.\n",
+                  resource);
+    }
+
+    #endif
+    
+    _NXUnpackResources[resource] = 1;
+  }
+
+  #ifdef PANIC
+  fprintf(stderr, "******NXAllocUnpack: PANIC! Can't reserve requested resource [%u].\n",
+              resource);
+  #endif
+
+  return NXNoResource;
+}
+
+int NXSetUnpackGeometry(Display *dpy, unsigned int resource, Visual *visual)
+{
+  register xNXSetUnpackGeometryReq *req;
+
+  LockDisplay(dpy);
+
+  GetReq(NXSetUnpackGeometry, req);
+
+  req -> resource = resource;
+
+  req -> depth1Bpp  = _XGetBitsPerPixel(dpy, 1);
+  req -> depth4Bpp  = _XGetBitsPerPixel(dpy, 4);
+  req -> depth8Bpp  = _XGetBitsPerPixel(dpy, 8);
+  req -> depth16Bpp = _XGetBitsPerPixel(dpy, 16);
+  req -> depth24Bpp = _XGetBitsPerPixel(dpy, 24);
+  req -> depth32Bpp = _XGetBitsPerPixel(dpy, 32);
+
+  if (visual != NULL)
+  {
+    req -> redMask   = visual -> red_mask;
+    req -> greenMask = visual -> green_mask;
+    req -> blueMask  = visual -> blue_mask;
+  }
+  else
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXSetUnpackGeometry: PANIC! Can't set the geometry without a visual.\n");
+    #endif
+
+    UnGetReq(NXSetUnpackGeometry);
+
+    UnlockDisplay(dpy);
+
+    return -1;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******NXSetUnpackGeometry: Resource [%u] Depth/Bpp [1/%d][4/%d][8/%d]"
+              "[16/%d][24/%d][32/%d].\n", resource, req -> depth1Bpp, req -> depth4Bpp,
+                  req -> depth8Bpp, req -> depth16Bpp, req -> depth24Bpp, req -> depth32Bpp);
+
+  fprintf(stderr, "******NXSetUnpackGeometry: red [0x%x] green [0x%x] blue [0x%x].\n",
+               (unsigned) req -> redMask, (unsigned) req -> greenMask, (unsigned) req -> blueMask);
+  #endif
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+/*
+ * Store a colormap table on the remote side.
+ * The colormap can then be used to unpack
+ * an image.
+ */
+
+int NXSetUnpackColormap(Display *dpy, unsigned int resource, unsigned int method,
+                            unsigned int entries, const char *data, unsigned int data_length)
+{
+  register xNXSetUnpackColormapReq *req;
+
+  register int dst_data_length;
+
+  LockDisplay(dpy);
+
+  GetReq(NXSetUnpackColormap, req);
+
+  req -> resource  = resource;
+  req -> method    = method;
+
+  req -> srcLength = data_length;
+  req -> dstLength = entries << 2;
+
+  dst_data_length = ROUNDUP(data_length, 4);
+
+  req -> length += (dst_data_length >> 2);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXSetUnpackColormap: Resource [%u] data size [%u] destination "
+              "data size [%u].\n", resource, data_length, dst_data_length);
+  #endif
+
+  if (data_length > 0)
+  {
+    if (dpy -> bufptr + dst_data_length <= dpy -> bufmax)
+    {
+      /*
+       * Clean the padding bytes in the request.
+       */
+
+      *((int *) (dpy -> bufptr + dst_data_length - 4)) = 0x0;
+
+      memcpy(dpy -> bufptr, data, data_length);
+
+      dpy -> bufptr += dst_data_length;
+    }
+    else
+    {
+      /*
+       * The _XSend() will pad the request for us.
+       */
+
+      _XSend(dpy, data, data_length);
+    }
+  }
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+/*
+ * Store data of the alpha blending channel
+ * that will be combined with the next image
+ * to be unpacked.
+ */
+
+int NXSetUnpackAlpha(Display *dpy, unsigned int resource, unsigned int method,
+                         unsigned int entries, const char *data, unsigned int data_length)
+{
+  register xNXSetUnpackAlphaReq *req;
+
+  register unsigned int dst_data_length;
+
+  LockDisplay(dpy);
+
+  GetReq(NXSetUnpackAlpha, req);
+
+  req -> resource  = resource;
+  req -> method    = method;
+
+  req -> srcLength = data_length;
+  req -> dstLength = entries;
+
+  dst_data_length = ROUNDUP(data_length, 4);
+
+  req -> length += (dst_data_length >> 2);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXSetUnpackAlpha: Resource [%u] data size [%u] destination data size [%u].\n",
+              resource, data_length, dst_data_length);
+  #endif
+
+  if (data_length > 0)
+  {
+    if (dpy -> bufptr + dst_data_length <= dpy -> bufmax)
+    {
+      /*
+       * Clean the padding bytes in the request.
+       */
+
+      *((int *) (dpy -> bufptr + dst_data_length - 4)) = 0x0;
+
+      memcpy(dpy -> bufptr, data, data_length);
+
+      dpy -> bufptr += dst_data_length;
+    }
+    else
+    {
+      /*
+       * The _XSend() will pad the request for us.
+       */
+
+      _XSend(dpy, data, data_length);
+    }
+  }
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+/*
+ * Compatibility versions to be used when
+ * connected to a 1.X.X proxy.
+ */
+
+/*
+ * These are for compatibility with the 1.X.X
+ * versions.
+ */
+
+#define sz_xNXSetUnpackColormapCompatReq        8
+
+typedef struct _NXSetUnpackColormapCompatReq {
+    CARD8  reqType;
+    CARD8  resource;
+    CARD16 length B16;
+    CARD32 entries B32;
+} xNXSetUnpackColormapCompatReq;
+
+#define X_NXSetUnpackColormapCompat  X_NXSetUnpackColormap
+
+int NXSetUnpackColormapCompat(Display *dpy, unsigned int resource,
+                                  unsigned int entries, const char *data)
+{
+  register xNXSetUnpackColormapCompatReq *req;
+
+  register char *dst_data;
+
+  register int dst_data_length;
+
+  #ifdef DUMP
+
+  int i;
+
+  #endif
+
+  LockDisplay(dpy);
+
+  GetReq(NXSetUnpackColormapCompat, req);
+
+  req -> resource = resource;
+  req -> entries  = entries;
+
+  dst_data_length = entries << 2;
+
+  req -> length += (dst_data_length >> 2);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXSetUnpackColormapCompat: Resource [%u] number of entries [%u] "
+              "destination data size [%u].\n", resource, entries, dst_data_length);
+  #endif
+
+  if (entries > 0)
+  {
+    if ((dpy -> bufptr + dst_data_length) <= dpy -> bufmax)
+    {
+      dst_data = dpy -> bufptr;
+    }
+    else
+    {
+      if ((dst_data = _XAllocScratch(dpy, dst_data_length)) == NULL)
+      {
+        #ifdef PANIC
+        fprintf(stderr, "******NXSetUnpackColormapCompat: PANIC! Cannot allocate memory.\n");
+        #endif
+
+        UnGetReq(NXSetUnpackColormapCompat);
+
+        UnlockDisplay(dpy);
+
+        return -1;
+      }
+    }
+
+    memcpy(dst_data, data, entries << 2);
+
+    #ifdef DUMP
+
+    fprintf(stderr, "******NXSetUnpackColormapCompat: Dumping colormap entries:\n");
+
+    for (i = 0; i < entries; i++)
+    {
+      fprintf(stderr, "******NXSetUnpackColormapCompat: [%d] -> [0x%x].\n",
+                  i, *((int *) (dst_data + (i * 4))));
+    }
+
+    #endif
+
+    if (dst_data == dpy -> bufptr)
+    {
+      dpy -> bufptr += dst_data_length;
+    }
+    else
+    {
+      _XSend(dpy, dst_data, dst_data_length);
+    }
+  }
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+#define sz_xNXSetUnpackAlphaCompatReq  8
+
+typedef struct _NXSetUnpackAlphaCompatReq {
+    CARD8  reqType;
+    CARD8  resource;
+    CARD16 length B16;
+    CARD32 entries B32;
+} xNXSetUnpackAlphaCompatReq;
+
+#define X_NXSetUnpackAlphaCompat  X_NXSetUnpackAlpha
+
+int NXSetUnpackAlphaCompat(Display *dpy, unsigned int resource,
+                               unsigned int entries, const char *data)
+{
+  register xNXSetUnpackAlphaCompatReq *req;
+
+  register char *dst_data;
+
+  register unsigned int dst_data_length;
+
+  #ifdef DUMP
+
+  int i;
+
+  #endif
+
+  LockDisplay(dpy);
+
+  GetReq(NXSetUnpackAlphaCompat, req);
+
+  req -> resource = resource;
+  req -> entries  = entries;
+
+  dst_data_length = ROUNDUP(entries, 4);
+
+  req -> length += (dst_data_length >> 2);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXSetUnpackAlphaCompat: Resource [%u] number of entries [%u] "
+              "destination data size [%u].\n", resource, entries, dst_data_length);
+  #endif
+
+  if (entries > 0)
+  {
+    if ((dpy -> bufptr + dst_data_length) <= dpy -> bufmax)
+    {
+      dst_data = dpy -> bufptr;
+    }
+    else
+    {
+      if ((dst_data = _XAllocScratch(dpy, dst_data_length)) == NULL)
+      {
+        #ifdef PANIC
+        fprintf(stderr, "******NXSetUnpackAlphaCompat: PANIC! Cannot allocate memory.\n");
+        #endif
+
+        UnGetReq(NXSetUnpackAlphaCompat);
+
+        UnlockDisplay(dpy);
+
+        return -1;
+      }
+    }
+
+    memcpy(dst_data, data, entries);
+
+    if (dst_data_length != entries)
+    {
+      memset(dst_data + entries, 0, dst_data_length - entries);
+    }
+
+    #ifdef DUMP
+
+    fprintf(stderr, "******NXSetUnpackAlphaCompat: Dumping alpha channel data:\n");
+
+    for (i = 0; i < dst_data_length; i++)
+    {
+      fprintf(stderr, "******NXSetUnpackAlphaCompat: [%d] -> [0x%02x].\n",
+                  i, ((unsigned int) *(dst_data + i)) & 0xff);
+    }
+
+    #endif
+
+    if (dst_data == dpy -> bufptr)
+    {
+      dpy -> bufptr += dst_data_length;
+    }
+    else
+    {
+      _XSend(dpy, dst_data, dst_data_length);
+    }
+  }
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+/*
+ * Free any geometry, colormap and alpha channel
+ * data stored by the remote proxy to unpack the
+ * image. Resource, as usual, must be a value
+ * between 0 and 255.
+ */
+
+int NXFreeUnpack(Display *dpy, unsigned int resource)
+{
+  register xNXFreeUnpackReq *req;
+
+  if (_NXUnpackResources[resource] != 0)
+  {
+    LockDisplay(dpy);
+
+    GetReq(NXFreeUnpack, req);
+
+    #ifdef TEST
+    fprintf(stderr, "******NXFreeUnpack: Sending message opcode [%d] with resource [%u].\n",
+                X_NXFreeUnpack, resource);
+    #endif
+
+    req -> resource = resource;
+
+    UnlockDisplay(dpy);
+
+    SyncHandle();
+
+    #ifdef TEST
+    fprintf(stderr, "******NXFreeUnpack: Making the resource [%u] newly available.\n",
+                resource);
+    #endif
+
+    _NXUnpackResources[resource] = 0;
+  }
+  #ifdef TEST
+  else
+  {
+    fprintf(stderr, "******NXFreeUnpack: Nothing to do for resource [%u].\n",
+                resource);
+  }
+  #endif
+
+  return 1;
+}
+
+/*
+ * Wrapper of XCreateImage(). Note that we use offset
+ * field of XImage to store size of source image in
+ * packed format. Note also that method is currently
+ * not stored in the NXignored.
+ */
+
+NXPackedImage *NXCreatePackedImage(Display *dpy, Visual *visual, unsigned int method,
+                                       unsigned int depth, int format, char *data,
+                                           int data_length, unsigned int width,
+                                               unsigned int height, int bitmap_pad,
+                                                   int bytes_per_line)
+{
+  XImage* image;
+
+  image = XCreateImage(dpy, visual, depth, format, 0, data,
+                           width, height, bitmap_pad, bytes_per_line);
+
+  if (image != NULL)
+  {
+    image -> xoffset = data_length;
+  }
+
+  return (NXPackedImage *) image;
+}
+
+/*
+ * Wrapper of XDestroyImage().
+ */
+
+int NXDestroyPackedImage(NXPackedImage *image)
+{
+  return XDestroyImage((XImage *) image);
+}
+
+/*
+ * Clean the image data directly in the current buffer.
+ */
+
+int NXCleanImage(XImage *image)
+{
+  #ifdef TEST
+  fprintf(stderr, "******NXCleanImage: Cleaning image with format [%d] depth [%d] "
+              "bits per pixel [%d].\n", image -> format, image -> depth,
+                  image -> bits_per_pixel);
+  #endif
+
+  if (image -> format == ZPixmap)
+  {
+    if (image -> depth == 1)
+    {
+      return CleanXYImage(image);
+    }
+    else
+    {
+      return CleanZImage(image);
+    }
+  }
+  else
+  {
+    return CleanXYImage(image);
+  }
+}
+
+NXPackedImage *NXPackImage(Display *dpy, XImage *src_image, unsigned int method)
+{
+  XImage *dst_image;
+
+  const ColorMask *mask;
+
+  unsigned int dst_data_size;
+  unsigned int dst_packed_data_size;
+
+  unsigned int dst_bits_per_pixel;
+  unsigned int dst_packed_bits_per_pixel;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXPackImage: Going to pack a new image with method [%d].\n",
+              method);
+  #endif
+
+  /*
+   * Get the mask out of the method and 
+   * check if the visual is supported by
+   * the color reduction algorithm.
+   */
+
+  mask = MethodColorMask(method);
+
+  if (mask == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXPackImage: WARNING! No mask to apply for pack method [%d].\n",
+                method);
+    #endif
+
+    return NULL;
+  }
+  else if (CanMaskImage(src_image, mask) == 0)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXPackImage: PANIC! Invalid source with format [%d] depth [%d] bits per pixel [%d].\n",
+                src_image -> format, src_image -> depth, src_image -> bits_per_pixel);
+
+    fprintf(stderr, "******NXPackImage: PANIC! Visual colormask is red 0x%lx green 0x%lx blue 0x%lx.\n",
+                src_image -> red_mask, src_image -> green_mask, src_image -> blue_mask);
+    #endif
+
+    return NULL;
+  }
+
+  /*
+   * Create a destination image from
+   * source and apply the color mask.
+   */
+
+  if ((dst_image = (XImage *) Xmalloc(sizeof(XImage))) == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXPackImage: PANIC! Cannot allocate [%d] bytes for the image.\n",
+                (int) sizeof(XImage));
+    #endif
+
+    return NULL;
+  }
+
+  *dst_image = *src_image;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXPackImage: Source width [%d], bytes per line [%d] with depth [%d].\n",
+              src_image -> width, src_image -> bytes_per_line, src_image -> depth);
+  #endif
+
+  dst_data_size = src_image -> bytes_per_line * src_image -> height;
+
+  dst_image -> data = Xmalloc(dst_data_size);
+
+  if (dst_image -> data == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXPackImage: PANIC! Cannot allocate [%d] bytes for masked image data.\n",
+                dst_data_size);
+    #endif
+
+    Xfree(dst_image);
+
+    return NULL;
+  }
+
+  /*
+   * If the pixel resulting from the mask
+   * needs more bits than available, then
+   * just clean the padding bits in the
+   * image.
+   */
+
+  dst_bits_per_pixel = dst_image -> bits_per_pixel;
+  dst_packed_bits_per_pixel = MethodBitsPerPixel(method);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXPackImage: Destination depth [%d], bits per pixel [%d], packed bits per pixel [%d].\n",
+             dst_image -> depth, dst_bits_per_pixel, dst_packed_bits_per_pixel);
+  #endif
+
+  if (dst_packed_bits_per_pixel > dst_bits_per_pixel ||
+          ShouldMaskImage(src_image, mask) == 0)
+  {
+    /*
+     * Should use the same data for source
+     * and destination to avoid the memcpy.
+     */
+
+    if (CopyAndCleanImage(src_image, dst_image) <= 0)
+    {
+      #ifdef PANIC
+      fprintf(stderr, "******NXPackImage: PANIC! Failed to clean the image.\n");
+      #endif
+
+      Xfree(dst_image -> data);
+
+      Xfree(dst_image);
+
+      return NULL;
+    }
+  }
+  else if (MaskImage(mask, src_image, dst_image) <= 0)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXPackImage: PANIC! Failed to apply the color mask.\n");
+    #endif
+
+    Xfree(dst_image -> data);
+
+    Xfree(dst_image);
+
+    return NULL;
+  }
+
+  /*
+   * Let's pack the same pixels in fewer bytes.
+   * Note that we save a new memory allocation
+   * by using the same image as source and des-
+   * tination. This means that PackImage() must
+   * be able to handle ovelapping areas.
+   */
+
+  #ifdef TEST
+  fprintf(stderr, "******NXPackImage: Plain bits per pixel [%d], data size [%d].\n",
+              dst_bits_per_pixel, dst_data_size);
+  #endif
+
+  dst_packed_data_size = dst_data_size * dst_packed_bits_per_pixel /
+                              dst_bits_per_pixel;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXPackImage: Packed bits per pixel [%d], data size [%d].\n",
+              dst_packed_bits_per_pixel, dst_packed_data_size);
+  #endif
+
+  if (PackImage(method, dst_data_size, dst_image,
+                    dst_packed_data_size, dst_image) <= 0)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXPackImage: PANIC! Failed to pack image from [%d] to [%d] bits per pixel.\n",
+                dst_bits_per_pixel, dst_packed_bits_per_pixel);
+    #endif
+
+    Xfree(dst_image -> data);
+
+    Xfree(dst_image);
+
+    return NULL;
+  }
+
+  /*
+   * Save data size in xoffset field
+   * to comply with NX packed images.
+   */
+
+  dst_image -> xoffset = dst_packed_data_size;
+
+  return dst_image;
+}
+
+/*
+ * NXInPlacePackImage creates a NXPackedImage
+ * from a XImage, sharing the same data buffer.
+ * Is up to the caller to free the data buffer
+ * only once.
+ */
+
+XImage *NXInPlacePackImage(Display *dpy, XImage *src_image, unsigned int method)
+{
+  XImage *dst_image;
+
+  const ColorMask *mask;
+
+  unsigned int dst_data_size;
+  unsigned int dst_packed_data_size;
+
+  unsigned int dst_bits_per_pixel;
+  unsigned int dst_packed_bits_per_pixel;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXInPlacePackImage: Going to pack a new image with method [%d].\n",
+              method);
+  #endif
+
+  /*
+   * Get mask out of method and check if
+   * visual is supported by current color
+   * reduction algorithm.
+   */
+
+  mask = MethodColorMask(method);
+
+  if (mask == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXInPlacePackImage: WARNING! No mask to apply for pack method [%d].\n",
+                method);
+    #endif
+
+    return NULL;
+  }
+  else if (CanMaskImage(src_image, mask) == 0)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXInPlacePackImage: PANIC! Invalid source with format [%d] depth [%d] bits per pixel [%d].\n",
+                src_image -> format, src_image -> depth, src_image -> bits_per_pixel);
+
+    fprintf(stderr, "******NXInPlacePackImage: PANIC! Visual colormask is red 0x%lx green 0x%lx blue 0x%lx.\n",
+                src_image -> red_mask, src_image -> green_mask, src_image -> blue_mask);
+    #endif
+    return NULL;
+  }
+
+  /*
+   * Create a destination image from
+   * source and apply the color mask.
+   */
+
+  if ((dst_image = (XImage *) Xmalloc(sizeof(XImage))) == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXInPlacePackImage: PANIC! Cannot allocate [%d] bytes for the image.\n",
+                (int) sizeof(XImage));
+    #endif
+
+    return NULL;
+  }
+
+  *dst_image = *src_image;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXInPlacePackImage: Source width [%d], bytes per line [%d] with depth [%d].\n",
+              src_image -> width, src_image -> bytes_per_line, src_image -> depth);
+  #endif
+
+  dst_data_size = src_image -> bytes_per_line * src_image -> height;
+
+  dst_image -> data = src_image -> data;
+
+  /*
+   * If pixel resulting from mask needs
+   * more bits than available, then just
+   * clean the pad bits in image.
+   */
+
+  dst_bits_per_pixel = dst_image -> bits_per_pixel;
+  dst_packed_bits_per_pixel = MethodBitsPerPixel(method);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXInPlacePackImage: Destination depth [%d], bits per pixel [%d], packed bits per pixel [%d].\n",
+              dst_image -> depth, dst_bits_per_pixel, dst_packed_bits_per_pixel);
+  #endif
+
+  if (dst_packed_bits_per_pixel > dst_bits_per_pixel ||
+          ShouldMaskImage(src_image, mask) == 0)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******NXInPlacePackImage: Just clean image packed_bits_per_pixel[%d], bits_per_pixel[%d].\n",
+                dst_packed_bits_per_pixel, dst_bits_per_pixel);
+    #endif
+
+    if (NXCleanImage(dst_image) <= 0)
+    {
+      #ifdef PANIC
+      fprintf(stderr, "******NXInPlacePackImage: PANIC! Failed to clean the image.\n");
+      #endif
+
+      Xfree(dst_image);
+
+      return NULL;
+    }
+  }
+  else if (MaskInPlaceImage(mask, dst_image) <= 0)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXInPlacePackImage: PANIC! Failed to apply the color mask.\n");
+    #endif
+
+    Xfree(dst_image);
+
+    return NULL;
+  }
+
+  /*
+   * Let's pack the same pixels in fewer bytes.
+   * Note that we save a new memory allocation
+   * by using the same image as source and des-
+   * tination. This means that PackImage() must
+   * be able to handle ovelapping areas.
+   */
+
+  #ifdef TEST
+  fprintf(stderr, "******NXInPlacePackImage: Plain bits per pixel [%d], data size [%d].\n",
+             dst_bits_per_pixel, dst_data_size);
+  #endif
+
+  dst_packed_data_size = dst_data_size * dst_packed_bits_per_pixel /
+    dst_bits_per_pixel;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXInPlacePackImage: Packed bits per pixel [%d], data size [%d].\n",
+             dst_packed_bits_per_pixel, dst_packed_data_size);
+  #endif
+
+  /*
+   * Save data size in xoffset field
+   * to comply with NX packed images.
+   */
+
+  dst_image -> xoffset = dst_packed_data_size;
+
+  return dst_image;
+}
+
+int NXPutPackedImage(Display *dpy, unsigned int resource, Drawable drawable,
+                         void *gc, NXPackedImage *image, unsigned int method,
+                             unsigned int depth, int src_x, int src_y, int dst_x,
+                                 int dst_y, unsigned int width, unsigned int height)
+{
+  register xNXPutPackedImageReq *req;
+
+  register unsigned int src_data_length;
+  register unsigned int dst_data_length;
+
+  LockDisplay(dpy);
+
+  FlushGC(dpy, (GC) gc);
+
+  GetReq(NXPutPackedImage, req);
+
+  req -> resource = resource;
+  req -> drawable = drawable;
+  req -> gc = ((GC) gc) -> gid;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXPutPackedImage: Image resource [%d] drawable [%d] gc [%d].\n",
+              req -> resource, (int) req -> drawable, (int) req -> gc);
+  #endif
+
+  /*
+   * There is no leftPad field in request. We only
+   * support a leftPad of 0. Anyway, X imposes a
+   * leftPad of 0 in case of ZPixmap format.
+   */
+
+  req -> format = image -> format;
+
+  /*
+   * Source depth, as well as width and height,
+   * are taken from the image structure.
+   */
+
+  req -> srcDepth = image -> depth;
+
+  req -> srcX = src_x;
+  req -> srcY = src_y;
+
+  req -> srcWidth  = image -> width;
+  req -> srcHeight = image -> height;
+
+  /*
+   * The destination depth is provided
+   * by the caller.
+   */
+
+  req -> dstDepth = depth;
+
+  req -> dstX = dst_x;
+  req -> dstY = dst_y;
+
+  req -> dstWidth  = width;
+  req -> dstHeight = height;
+
+  req -> method = method;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXPutPackedImage: Source image depth [%d] destination depth [%d] "
+              "method [%d].\n", req -> srcDepth, req -> dstDepth, req -> method);
+  #endif
+
+  /*
+   * Source data length is the size of image in packed format,
+   * as stored in xoffset field of XImage. Destination data
+   * size is calculated according to bytes per line of target
+   * image, so the caller must provide the right depth at the
+   * time XImage structure is created.
+   */
+
+  req -> srcLength = image -> xoffset;
+
+  if (image -> width == (int) width &&
+          image -> height == (int) height)
+  {
+    req -> dstLength = image -> bytes_per_line * image -> height;
+  }
+  else if (image -> format == ZPixmap)
+  {
+    req -> dstLength = ROUNDUP((image -> bits_per_pixel * width),
+                                    image -> bitmap_pad) * height >> 3;
+  }
+  else
+  {
+    req -> dstLength = ROUNDUP(width, image -> bitmap_pad) * height >> 3;
+  }
+
+  src_data_length = image -> xoffset;
+
+  dst_data_length = ROUNDUP(src_data_length, 4);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXPutPackedImage: Source data length [%d] request data length [%d].\n",
+              src_data_length, dst_data_length);
+  #endif
+
+  req -> length += (dst_data_length >> 2);
+
+  if (src_data_length > 0)
+  {
+    if (dpy -> bufptr + dst_data_length <= dpy -> bufmax)
+    {
+      /*
+       * Clean the padding bytes in the request.
+       */
+
+      *((int *) (dpy -> bufptr + dst_data_length - 4)) = 0x0;
+
+      memcpy(dpy -> bufptr, image -> data, src_data_length);
+
+      dpy -> bufptr += dst_data_length;
+    }
+    else
+    {
+      /*
+       * The _XSend() will pad the request for us.
+       */
+
+      _XSend(dpy, image -> data, src_data_length);
+    }
+  }
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+int NXAllocColors(Display *dpy, Colormap colormap, unsigned int entries,
+                      XColor screens_in_out[], Bool results_in_out[])
+{
+  Status result = 0;
+  xAllocColorReply rep;
+  register xAllocColorReq *req;
+
+  Bool alloc_error = False;
+
+  register unsigned int i;
+
+  LockDisplay(dpy);
+
+  for (i = 0; i < entries; i++)
+  {
+    GetReq(AllocColor, req);
+
+    req -> cmap  = colormap;
+
+    req -> red   = screens_in_out[i].red;
+    req -> green = screens_in_out[i].green;
+    req -> blue  = screens_in_out[i].blue;
+  }
+
+  for (i = 0; i < entries; i++)
+  {
+    result = _XReply(dpy, (xReply *) &rep, 0, xTrue);
+
+    if (result)
+    {
+      screens_in_out[i].pixel = rep.pixel;
+
+      screens_in_out[i].red   = rep.red;
+      screens_in_out[i].green = rep.green;
+      screens_in_out[i].blue  = rep.blue;
+      
+      results_in_out[i] = True;
+    } 
+    else 
+    {
+      results_in_out[i] = False;
+
+      alloc_error = True;
+    }
+  }
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return (alloc_error == False);
+}
+
+char *NXEncodeColormap(const char *src_data, unsigned int src_size, unsigned int *dst_size)
+{
+  return ColormapCompressData(src_data, src_size, dst_size);
+}
+
+char *NXEncodeAlpha(const char *src_data, unsigned int src_size, unsigned int *dst_size)
+{
+  return AlphaCompressData(src_data, src_size, dst_size);
+}
+
+NXPackedImage *NXEncodeRgb(XImage *src_image, unsigned int method, unsigned int quality)
+{
+  NXPackedImage *dst_image = NULL;
+
+  unsigned int dst_size;
+
+  /*
+   * Create a new image structure as a copy
+   * of the source.
+   */
+
+  if ((dst_image = (NXPackedImage *) Xmalloc(sizeof(NXPackedImage))) == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXEncodeRgb: PANIC! Cannot allocate [%d] bytes for the image.\n",
+                (int) sizeof(XImage));
+    #endif
+
+    return NULL;
+  }
+
+  *dst_image = *src_image;
+
+  dst_image -> data = RgbCompressData(src_image, &dst_size);
+
+  if (dst_image -> data == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXEncodeRgb: PANIC! Rgb compression failed.\n");
+    #endif
+
+    Xfree(dst_image);
+
+    return NULL;
+  }
+
+  /*
+   * Store the Rgb size in the xoffset field.
+   */
+
+  dst_image -> xoffset = dst_size;
+
+  return dst_image;
+}
+
+NXPackedImage *NXEncodeRle(XImage *src_image, unsigned int method, unsigned int quality)
+{
+  NXPackedImage *dst_image = NULL;
+
+  unsigned int dst_size;
+
+  /*
+   * Create a new image structure as a copy
+   * of the source.
+   */
+
+  if ((dst_image = (NXPackedImage *) Xmalloc(sizeof(NXPackedImage))) == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXEncodeRle: PANIC! Cannot allocate [%d] bytes for the image.\n",
+                (int) sizeof(XImage));
+    #endif
+
+    return NULL;
+  }
+
+  *dst_image = *src_image;
+
+  dst_image -> data = RleCompressData(src_image, &dst_size);
+
+  if (dst_image -> data == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXEncodeRle: PANIC! Rle compression failed.\n");
+    #endif
+
+    Xfree(dst_image);
+
+    return NULL;
+  }
+
+  /*
+   * Store the Rle size in the xoffset field.
+   */
+
+  dst_image -> xoffset = dst_size;
+
+  return dst_image;
+}
+
+NXPackedImage *NXEncodeBitmap(XImage *src_image, unsigned int method, unsigned int quality)
+{
+  NXPackedImage *dst_image = NULL;
+
+  unsigned int dst_size;
+
+  /*
+   * Create a new image structure as a copy
+   * of the source.
+   */
+
+  if ((dst_image = (NXPackedImage *) Xmalloc(sizeof(NXPackedImage))) == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXEncodeBitmap: PANIC! Cannot allocate [%d] bytes for the image.\n",
+                (int) sizeof(XImage));
+    #endif
+
+    return NULL;
+  }
+
+  *dst_image = *src_image;
+
+  dst_image -> data = BitmapCompressData(src_image, &dst_size);
+
+  if (dst_image -> data == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXEncodeBitmap: PANIC! Bitmap compression failed.\n");
+    #endif
+
+    Xfree(dst_image);
+
+    return NULL;
+  }
+
+  /*
+   * Store the bitmap size in the xoffset field.
+   */
+
+  dst_image -> xoffset = dst_size;
+
+  return dst_image;
+}
+
+NXPackedImage *NXEncodeJpeg(XImage *src_image, unsigned int method, unsigned int quality)
+{
+  NXPackedImage *dst_image = NULL;
+
+  int size;
+
+  /*
+   * Check if the bpp of the image is valid
+   * for the Jpeg compression.
+   */
+
+  if (src_image -> bits_per_pixel < 15)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXEncodeJpeg: PANIC! Invalid bpp for Jpeg compression [%d]\n.",
+                src_image -> bits_per_pixel);
+    #endif
+
+    return NULL;
+  }
+
+  /*
+   * Create the destination image as a copy
+   * of the source.
+   */
+
+  if ((dst_image = (NXPackedImage *) Xmalloc(sizeof(NXPackedImage))) == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXEncodeJpeg: PANIC! Cannot allocate [%d] bytes for the Jpeg image.\n",
+                (int) sizeof(NXPackedImage));
+    #endif
+
+    return NULL;
+  }
+
+  *dst_image = *src_image;
+
+  dst_image -> data = JpegCompressData(src_image, quality, &size);
+
+  if (dst_image -> data == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXEncodeJpeg: PANIC! Jpeg compression failed.\n");
+    #endif
+
+    Xfree(dst_image);
+
+    return NULL;
+  }
+
+  /*
+   * Store the Jpeg size in the xoffset field.
+   */
+
+  dst_image -> xoffset = size;
+
+  return dst_image;
+}
+
+NXPackedImage *NXEncodePng(XImage *src_image, unsigned int method, unsigned int quality)
+{
+  NXPackedImage *dst_image = NULL;
+
+  int size;
+
+  /*
+   * Check if the bpp of the image is valid
+   * for png compression.
+   */
+
+  if (src_image -> bits_per_pixel < 15)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXEncodePng: PANIC! Invalid bpp for Png compression [%d].\n",
+                src_image -> bits_per_pixel);
+    #endif
+
+    return NULL;
+  }
+
+  if ((dst_image = (NXPackedImage *) Xmalloc(sizeof(NXPackedImage))) == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXEncodePng: PANIC! Cannot allocate [%d] bytes for the Png image.\n",
+                (int) sizeof(NXPackedImage));
+    #endif
+
+    return NULL;
+  }
+
+  *dst_image = *src_image;
+
+  dst_image -> data = PngCompressData(dst_image, &size);
+
+  if (dst_image -> data == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXEncodePng: PANIC! Png compression failed.\n");
+    #endif
+
+    Xfree(dst_image);
+
+    return NULL;
+  }
+
+  /*
+   * Store the Png size in the xoffset field.
+   */
+
+  dst_image -> xoffset = size;
+
+  return dst_image;
+}
+
+int NXEncodeColors(XImage *src_image, NXColorTable *color_table, int nb_max)
+{
+  int x, y, t, p;
+
+  long pixel;
+
+  /*
+   * We need a smarter way to extract
+   * the colors from the image and
+   * create a color table.
+   */
+
+  memset(color_table, 0, nb_max * sizeof(NXColorTable));
+
+  for (x = 0, p = 0; x < src_image -> width; x++)
+  {
+    for (y = 0; y < src_image -> height; y++)
+    {
+      pixel  = XGetPixel(src_image, x, y);
+
+      for (t = 0; t < nb_max; t++)
+      {
+        if ( color_table[t].found == 0)
+        {
+          color_table[t].pixel =  pixel;
+          color_table[t].found =  1;
+
+          p++;
+
+          break;
+        }
+        else if ((color_table[t].pixel) == pixel)
+        {
+          break;
+        }
+      }
+
+      if (p == nb_max)
+      {
+        return nb_max + 1;
+      }
+    }
+  }
+
+  return p;
+}
+
+void NXMaskImage(XImage *image, unsigned int method)
+{
+  unsigned int maskMethod;
+
+  const ColorMask *mask;
+
+  /*
+   * Choose the correct mask method
+   */
+
+  switch(method)
+  {
+    case PACK_JPEG_8_COLORS:
+    case PACK_PNG_8_COLORS:
+    {
+      maskMethod = MASK_8_COLORS;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******NXMaskImage: Method is MASK_8_COLORS\n");
+      #endif
+
+      break;
+    }
+    case PACK_JPEG_64_COLORS:
+    case PACK_PNG_64_COLORS:
+    {
+      maskMethod = MASK_64_COLORS;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******NXMaskImage: Method is MASK_64K_COLORS\n");
+      #endif
+
+      break;
+    }
+    case PACK_JPEG_256_COLORS:
+    case PACK_PNG_256_COLORS:
+    {
+      maskMethod = MASK_256_COLORS;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******NXMaskImage: Method is MASK_256_COLORS\n");
+      #endif
+
+      break;
+    }
+    case PACK_JPEG_512_COLORS:
+    case PACK_PNG_512_COLORS:
+    {
+      maskMethod = MASK_512_COLORS;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******NXMaskImage: Method is MASK_512K_COLORS\n");
+      #endif
+
+      break;
+    }
+    case PACK_JPEG_4K_COLORS:
+    case PACK_PNG_4K_COLORS:
+    {
+      maskMethod = MASK_4K_COLORS;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******NXMaskImage: Method is MASK_4K_COLORS\n");
+      #endif
+
+      break;
+    }
+    case PACK_JPEG_32K_COLORS:
+    case PACK_PNG_32K_COLORS:
+    {
+      maskMethod = MASK_32K_COLORS;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******NXMaskImage: Method is MASK_32K_COLORS\n");
+      #endif
+
+      break;
+    }
+    case PACK_JPEG_64K_COLORS:
+    case PACK_PNG_64K_COLORS:
+    {
+      maskMethod = MASK_64K_COLORS;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******NXMaskImage: Method is MASK_64K_COLORS\n");
+      #endif
+
+      break;
+    }
+    case PACK_JPEG_256K_COLORS:
+    case PACK_PNG_256K_COLORS:
+    {
+      maskMethod = MASK_256K_COLORS;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******NXMaskImage: Method is MASK_256K_COLORS\n");
+      #endif
+
+      break;
+    }
+    case PACK_JPEG_2M_COLORS:
+    case PACK_PNG_2M_COLORS:
+    {
+      maskMethod = MASK_2M_COLORS;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******NXMaskImage: Method is MASK_2M_COLORS\n");
+      #endif
+
+      break;
+    }
+    case PACK_JPEG_16M_COLORS:
+    case PACK_PNG_16M_COLORS:
+    {
+      maskMethod = MASK_16M_COLORS;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******NXMaskImage: Method is MASK_16M_COLORS\n");
+      #endif
+
+      break;
+    }
+    default:
+    {
+      #ifdef PANIC
+      fprintf(stderr, "******NXMaskImage: PANIC! Cannot find mask method for pack method [%d]\n",
+                  method);
+      #endif
+
+      return;
+    }
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******NXMaskImage: packMethod[%d] => maskMethod[%d]\n",
+              method, maskMethod);
+  #endif
+
+  /*
+   * Get mask out of method and check if
+   * visual is supported by current color
+   * reduction algorithm.
+   */
+
+  mask = MethodColorMask(maskMethod);
+
+  if (mask == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXMaskImage: PANIC! No mask to apply for pack method [%d].\n",
+                method);
+    #endif
+
+    return;
+  }
+  else if (CanMaskImage(image, mask) == 0)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXMaskImage: PANIC! Invalid source with format [%d] depth [%d] bits per pixel [%d].\n",
+                image -> format, image -> depth, image -> bits_per_pixel);
+
+    fprintf(stderr, "******NXMaskImage: PANIC! Visual colormask is red 0x%lx green 0x%lx blue 0x%lx.\n",
+                image -> red_mask, image -> green_mask, image -> blue_mask);
+    #endif
+
+    return;
+  }
+
+  /*
+   * Calling ShouldMaskImage you get 0 in the case
+   * of MASK_256_COLORS and MASK_64K_COLORS, which
+   * means that the image should not be masked.
+   */
+
+  if (ShouldMaskImage(image, mask) == 0)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******NXMaskImage: the image will not be masked\n");
+    #endif
+  }
+  else
+  {
+    if (MaskInPlaceImage(mask, image) <= 0)
+    {
+      #ifdef PANIC
+      fprintf(stderr, "******NXMaskImage: PANIC! Failed to apply the color mask in place.\n");
+      #endif
+    }
+  }
+}
+
+/*
+ * The display parameter is ignored.
+ */
+
+void NXInitCache(Display *dpy, int entries)
+{
+  if (NXImageCache != NULL && NXImageCacheSize == entries)
+  {
+    #ifdef DEBUG
+    fprintf(stderr, "******NXInitCache: Nothing to do with image cache at [%p] and [%d] entries.\n",
+                NXImageCache,  NXImageCacheSize);
+    #endif
+
+    return;
+  }
+
+  #ifdef DEBUG
+  fprintf(stderr, "******NXInitCache: Initializing the cache with [%d] entries.\n",
+              entries);
+  #endif
+
+  NXImageCacheSize = 0;
+
+  if (NXImageCache != NULL)
+  {
+    Xfree(NXImageCache);
+
+    NXImageCache = NULL;
+  }
+
+  if (entries > 0)
+  {
+    NXImageCache = Xmalloc(entries * sizeof(_NXImageCacheEntry));
+
+    if (NXImageCache != NULL)
+    {
+      memset(NXImageCache, 0, entries * sizeof(_NXImageCacheEntry));
+
+      NXImageCacheSize = entries;
+
+      #ifdef DEBUG
+      fprintf(stderr, "******NXInitCache: Image cache initialized with [%d] entries.\n", entries);
+      #endif
+    }
+  }
+}
+
+#ifdef DUMP
+
+void _NXCacheDump(const char *label)
+{
+  char s[MD5_LENGTH * 2 + 1];
+
+  int i;
+  int j;
+
+  #ifdef DEBUG
+  fprintf(stderr, "%s: Dumping the content of image cache:\n", label);
+  #endif
+
+  for (i = 0; i < NXImageCacheSize; i++)
+  {
+    if (NXImageCache[i].image == NULL)
+    {
+      break;
+    }
+
+    for (j = 0; j < MD5_LENGTH; j++)
+    {
+      sprintf(s + (j * 2), "%02X", ((unsigned char *) NXImageCache[i].md5)[j]);
+    }
+
+    #ifdef DEBUG
+    fprintf(stderr, "%s: [%d][%s].\n", label, i, s);
+    #endif
+  }
+}
+
+#endif
+
+XImage *NXCacheFindImage(NXPackedImage *src_image, unsigned int *method, unsigned char **md5)
+{
+  md5_state_t  new_state;
+  md5_byte_t   *new_md5;
+  unsigned int data_size, i;
+
+  if (NXImageCache == NULL)
+  {
+    return NULL;
+  }
+
+  /*
+   * Will return the allocated checksum
+   * if the image is not found.
+   */
+
+  *md5 = NULL;
+
+  if ((new_md5 = Xmalloc(MD5_LENGTH)) == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXCacheFindImage: Can't allocate memory for the checksum.\n");
+    #endif
+
+    return NULL;
+  }
+
+  data_size = (src_image -> bytes_per_line * src_image -> height);
+
+  md5_init(&new_state);
+
+  md5_append(&new_state, (unsigned char *) &src_image -> width,  sizeof(int));
+  md5_append(&new_state, (unsigned char *) &src_image -> height, sizeof(int));
+
+  md5_append(&new_state, (unsigned char *) src_image -> data, data_size);
+
+  md5_finish(&new_state, new_md5);
+
+  for (i = 0; i < NXImageCacheSize; i++)
+  {
+    if (NXImageCache[i].image != NULL)
+    {
+      if (memcmp(NXImageCache[i].md5, new_md5, MD5_LENGTH) == 0)
+      {
+        _NXImageCacheEntry found;
+
+        found.image  = NXImageCache[i].image;
+        found.method = NXImageCache[i].method;
+        found.md5    = NXImageCache[i].md5;
+
+        *method = found.method;
+
+        NXImageCacheHits++;
+
+        #ifdef DEBUG
+        fprintf(stderr, "******NXCacheFindImage: Found at position [%d] with hits [%d] and [%d] packs.\n",
+                    i, NXImageCacheHits, NXImageCacheOps);
+        #endif
+
+        Xfree(new_md5);
+
+        /*
+         * Move the images down one slot, from
+         * the head of the list, and place the
+         * image just found at top.
+         */
+
+        if (i > 16)
+        {
+          #ifdef DEBUG
+          fprintf(stderr, "******NXCacheFindImage: Moving the image at the head of the list.\n");
+          #endif
+
+          memmove(&NXImageCache[1], &NXImageCache[0], (i * sizeof(_NXImageCacheEntry)));
+
+          NXImageCache[0].image  = found.image;
+          NXImageCache[0].method = found.method;
+          NXImageCache[0].md5    = found.md5;
+
+          #ifdef DUMP
+
+          _NXCacheDump("******NXCacheFindImage");
+
+          #endif
+        }
+
+        /*
+         * Return the checksum and image
+         * structure allocated in cache.
+         */
+
+        *md5 = found.md5;
+
+        return found.image;
+      }
+    }
+    else
+    {
+      break;
+    }
+  }
+
+  *md5 = new_md5;
+
+  return NULL;
+}
+
+/*
+ * Add a packed image to the cache. A new image
+ * structure is allocated and copied, data and
+ * checksum are inherited from the passed image.
+ */
+
+int NXCacheAddImage(NXPackedImage *image, unsigned int method, unsigned char *md5)
+{
+  unsigned int i;
+
+  if (image == NULL || image -> data == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXCacheAddImage: PANIC! Invalid image passed to function.\n");
+    #endif
+
+    return -1;
+  }
+
+  i = (NXImageCacheOps < NXImageCacheSize) ? NXImageCacheOps : NXImageCacheSize;
+
+  if (NXImageCacheOps >= NXImageCacheSize)
+  {
+    #ifdef DEBUG
+    fprintf(stderr, "******NXCacheAddImage: Freeing up the oldest entry.\n");
+    #endif
+
+    i--;
+
+    Xfree(NXImageCache[NXImageCacheSize - 1].image -> data);
+    Xfree(NXImageCache[NXImageCacheSize - 1].image);
+    Xfree(NXImageCache[NXImageCacheSize - 1].md5);
+  }
+
+  if (i > 0)
+  {
+    memmove(&NXImageCache[1], &NXImageCache[0], i * sizeof(_NXImageCacheEntry));
+  }
+
+  NXImageCacheOps++;
+
+  #ifdef DEBUG
+  fprintf(stderr, "******NXCacheAddImage: Going to add new image with data size [%d].\n",
+              image -> xoffset);
+  #endif
+
+  NXImageCache[0].image  = image;
+  NXImageCache[0].method = method;
+  NXImageCache[0].md5    = md5;
+
+  #ifdef DUMP
+
+  _NXCacheDump("******NXCacheAddImage");
+
+  #endif
+
+  return 1;
+}
+
+/*
+ * The display parameter is ignored.
+ */
+
+void NXFreeCache(Display *dpy)
+{
+  int i;
+
+  if (NXImageCache == NULL)
+  {
+    #ifdef DEBUG
+    fprintf(stderr, "******NXFreeCache: Nothing to do with a null image cache.\n");
+    #endif
+
+    return;
+  }
+
+  #ifdef DEBUG
+  fprintf(stderr, "******NXFreeCache: Freeing the cache with [%d] entries.\n",
+              NXImageCacheSize);
+  #endif
+
+  for (i = 0; i < NXImageCacheSize; i++)
+  {
+    if (NXImageCache[i].image != NULL)
+    {
+      if (NXImageCache[i].image -> data != NULL)
+      {
+        Xfree(NXImageCache[i].image -> data);
+      }
+
+      Xfree(NXImageCache[i].image);
+
+      NXImageCache[i].image = NULL;
+    }
+
+    if (NXImageCache[i].md5 != NULL)
+    {
+      Xfree(NXImageCache[i].md5);
+
+      NXImageCache[i].md5 = NULL;
+    }
+  }
+
+  Xfree(NXImageCache);
+
+  NXImageCache = NULL;
+
+  NXImageCacheSize = 0;
+  NXImageCacheHits = 0;
+  NXImageCacheOps  = 0;
+}
+
+static void _NXNotifyImage(Display *dpy, int resource, Bool success)
+{
+  XEvent async_event;
+
+  /*
+   * Enqueue an event to tell client
+   * the result of GetImage.
+   */
+
+  async_event.type = ClientMessage;
+
+  async_event.xclient.window       = 0;
+  async_event.xclient.message_type = 0;
+  async_event.xclient.format       = 32;
+
+  async_event.xclient.data.l[0] = NXCollectImageNotify;
+  async_event.xclient.data.l[1] = resource;
+  async_event.xclient.data.l[2] = success;
+
+  XPutBackEvent(dpy, &async_event);
+}
+
+static Bool _NXCollectImageHandler(Display *dpy, xReply *rep, char *buf,
+                                       int len, XPointer data)
+{
+  register _NXCollectImageState *state;
+
+  register xGetImageReply *async_rep;
+
+  char *async_head;
+  char *async_data;
+
+  int async_size;
+
+  state = (_NXCollectImageState *) data;
+
+  if ((rep -> generic.sequenceNumber % 65536) !=
+          ((int)(state -> sequence) % 65536))
+  {
+    #ifdef TEST
+    fprintf(stderr, "******_NXCollectImageHandler: Unmatched sequence [%d] for opcode [%d] "
+                "with length [%d].\n", rep -> generic.sequenceNumber, rep -> generic.type,
+                    (int) rep -> generic.length << 2);
+    #endif
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectImageHandler: Going to handle asynchronous GetImage reply.\n");
+  #endif
+
+  /*
+   * As even reply data is managed asynchronously,
+   * we can use state to get to vector and vector
+   * to get to handler. In this way, we can safely
+   * dequeue and free the handler itself.
+   */
+
+  DeqAsyncHandler(dpy, state -> handler);
+
+  Xfree(state -> handler);
+
+  state -> handler = NULL;
+
+  if (rep -> generic.type == X_Error)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******_NXCollectImageHandler: Error received from X server for resource [%d].\n",
+                state -> resource);
+    #endif
+
+    _NXNotifyImage(dpy, state -> resource, False);
+
+    _NXCollectedImages[state -> resource] = NULL;
+
+    Xfree(state);
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectImageHandler: Matched request with sequence [%ld].\n",
+              state -> sequence);
+  #endif
+
+  async_size = SIZEOF(xGetImageReply);
+
+  async_head = Xmalloc(async_size);
+
+  if (async_head == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******_NXCollectImageHandler: PANIC! Failed to allocate memory with resource [%d].\n",
+                state -> resource);
+    #endif
+
+    _NXNotifyImage(dpy, state -> resource, False);
+
+    _NXCollectedImages[state -> resource] = NULL;
+
+    Xfree(state);
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectImageHandler: Going to get reply with size [%d].\n",
+              (int) rep -> generic.length << 2);
+  #endif
+
+  async_rep = (xGetImageReply *) _XGetAsyncReply(dpy, async_head, rep, buf, len, 0, False);
+
+  if (async_rep == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******_NXCollectImageHandler: PANIC! Failed to get reply with resource [%d].\n",
+                state -> resource);
+    #endif
+
+    _NXNotifyImage(dpy, state -> resource, False);
+
+    _NXCollectedImages[state -> resource] = NULL;
+
+    Xfree(state);
+
+    Xfree(async_head);
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectImageHandler: Got reply with depth [%d] visual [%d] size [%d].\n",
+              async_rep -> depth, (int) async_rep -> visual, (int) async_rep -> length << 2);
+  #endif
+
+  async_size = async_rep -> length << 2;
+
+  if (async_size > 0)
+  {
+    async_data = Xmalloc(async_size);
+
+    if (async_data == NULL)
+    {
+      #ifdef PANIC
+      fprintf(stderr, "******_NXCollectImageHandler: PANIC! Failed to allocate memory with resource [%d].\n",
+                  state -> resource);
+      #endif
+
+      _NXNotifyImage(dpy, state -> resource, False);
+
+      _NXCollectedImages[state -> resource] = NULL;
+
+      Xfree(state);
+
+      Xfree(async_head);
+
+      return False;
+    }
+
+    #ifdef TEST
+    fprintf(stderr, "******_NXCollectImageHandler: Going to get data with size [%d].\n",
+                async_size);
+    #endif
+
+    _XGetAsyncData(dpy, async_data, buf, len, SIZEOF(xGetImageReply), async_size, async_size);
+
+    /*
+     * From now on we can return True, as all
+     * data has been consumed from buffer.
+     */
+
+    if (state -> format == XYPixmap)
+    {
+      unsigned long depth = DepthOnes(state -> mask & (((unsigned long)0xFFFFFFFF) >>
+                                          (32 - async_rep -> depth)));
+
+      state -> image = XCreateImage(dpy, _XVIDtoVisual(dpy, async_rep -> visual),
+                                        depth, XYPixmap, 0, async_data, state -> width,
+                                            state -> height, dpy -> bitmap_pad, 0);
+    }
+    else
+    {
+      state -> image = XCreateImage(dpy, _XVIDtoVisual(dpy, async_rep -> visual),
+                                        async_rep -> depth, ZPixmap, 0, async_data, state -> width,
+                                            state -> height, _XGetScanlinePad(dpy, async_rep -> depth), 0);
+    }
+
+    if (state -> image == NULL)
+    {
+      #ifdef PANIC
+      fprintf(stderr, "******_NXCollectImageHandler: PANIC! Failed to create image for resource [%d].\n",
+                  state -> resource);
+      #endif
+
+      _NXNotifyImage(dpy, state -> resource, False);
+
+      _NXCollectedImages[state -> resource] = NULL;
+
+      Xfree(state);
+
+      Xfree(async_head);
+      Xfree(async_data);
+
+      return True;
+    }
+
+    #ifdef TEST
+    fprintf(stderr, "******_NXCollectImageHandler: Successfully stored image data for resource [%d].\n",
+                state -> resource);
+    #endif
+  }
+  #ifdef WARNING
+  else
+  {
+    fprintf(stderr, "******_NXCollectImageHandler: WARNING! Null image data stored for resource [%d].\n",
+                state -> resource);
+  }
+  #endif
+
+  _NXNotifyImage(dpy, state -> resource, True);
+
+  Xfree(async_head);
+
+  return True;
+}
+
+int NXGetCollectImageResource(Display *dpy)
+{
+  int i;
+
+  for (i = 0; i < NXNumberOfResources; i++)
+  {
+    if (_NXCollectedImages[i] == NULL)
+    {
+      return i;
+    }
+  }
+
+  return -1;
+}
+
+int NXCollectImage(Display *dpy, unsigned int resource, Drawable drawable,
+                       int src_x, int src_y, unsigned int width, unsigned int height,
+                           unsigned long plane_mask, int format)
+{
+  register xGetImageReq *req;
+
+  _NXCollectImageState *state;
+  _XAsyncHandler *handler;
+
+  if (resource >= NXNumberOfResources)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXCollectImage: PANIC! Provided resource [%u] is out of range.\n",
+                resource);
+    #endif
+
+    return -1;
+  }
+
+  state = _NXCollectedImages[resource];
+
+  if (state != NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXCollectImage: PANIC! Having to remove previous state for resource [%u].\n",
+                resource);
+    #endif
+
+    if (state -> handler != NULL)
+    {
+      DeqAsyncHandler(dpy, state -> handler);
+
+      Xfree(state -> handler);
+    }
+
+    if (state -> image != NULL)
+    {
+      XDestroyImage(state -> image);
+    }
+
+    Xfree(state);
+
+    _NXCollectedImages[resource] = NULL;
+  }
+
+  LockDisplay(dpy);
+
+  GetReq(GetImage, req);
+
+  req -> format    = format;
+  req -> drawable  = drawable;
+  req -> x         = src_x;
+  req -> y         = src_y;
+  req -> width     = width;
+  req -> height    = height;
+  req -> planeMask = plane_mask;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXCollectImage: Sending message opcode [%d] sequence [%ld] for resource [%d].\n",
+              X_GetImage, dpy -> request, resource);
+
+  fprintf(stderr, "******NXCollectImage: Format [%d] drawable [%d] src_x [%d] src_y [%d].\n",
+              req -> format, (int) req -> drawable, req -> x, req -> y);
+
+  fprintf(stderr, "******NXCollectImage: Width [%d] height [%d] plane_mask [%x].\n",
+              req -> width, req -> height, (int) req -> planeMask);
+  #endif
+
+  state   = Xmalloc(sizeof(_NXCollectImageState));
+  handler = Xmalloc(sizeof(_XAsyncHandler));
+
+  if (state == NULL || handler == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXCollectImage: PANIC! Failed to allocate memory with resource [%d].\n",
+                resource);
+    #endif
+
+    UnGetReq(GetImage);
+
+    if (state != NULL)
+    {
+      Xfree(state);
+    }
+
+    if (handler != NULL)
+    {
+      Xfree(handler);
+    }
+
+    UnlockDisplay(dpy);
+
+    return -1;
+  }
+
+  state -> sequence = dpy -> request;
+  state -> resource = resource;
+  state -> mask     = plane_mask;
+  state -> format   = format;
+  state -> width    = width;
+  state -> height   = height;
+  state -> image    = NULL;
+
+  state -> handler = handler;
+
+  handler -> next = dpy -> async_handlers;
+  handler -> handler = _NXCollectImageHandler;
+  handler -> data = (XPointer) state;
+  dpy -> async_handlers = handler;
+
+  _NXCollectedImages[resource] = state;
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return 1;
+}
+
+int NXGetCollectedImage(Display *dpy, unsigned int resource, XImage **image)
+{
+  register _NXCollectImageState *state;
+
+  state = _NXCollectedImages[resource];
+
+  if (state == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXGetCollectedImage: PANIC! No image collected for resource [%u].\n",
+                resource);
+    #endif
+
+    return 0;
+  }
+
+  _NXCollectedImages[resource] = NULL;
+
+  *image = state -> image;
+
+  Xfree(state);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXGetCollectedImage: Returning GetImage data for resource [%u].\n",
+              resource);
+  #endif
+
+  return 1;
+}
+
+static void _NXNotifyProperty(Display *dpy, int resource, Bool success)
+{
+  XEvent async_event;
+
+  /*
+   * Enqueue an event to tell client
+   * the result of GetProperty.
+   */
+
+  async_event.type = ClientMessage;
+
+  async_event.xclient.window       = 0;
+  async_event.xclient.message_type = 0;
+  async_event.xclient.format       = 32;
+
+  async_event.xclient.data.l[0] = NXCollectPropertyNotify;
+  async_event.xclient.data.l[1] = resource;
+  async_event.xclient.data.l[2] = success;
+
+  XPutBackEvent(dpy, &async_event);
+}
+
+static Bool _NXCollectPropertyHandler(Display *dpy, xReply *rep, char *buf,
+                                          int len, XPointer data)
+{
+  register _NXCollectPropertyState *state;
+
+  register xGetPropertyReply *async_rep;
+
+  char *async_head;
+  char *async_data;
+
+  int async_size;
+
+  state = (_NXCollectPropertyState *) data;
+
+  if ((rep -> generic.sequenceNumber % 65536) !=
+          ((int)(state -> sequence) % 65536))
+  {
+    #ifdef TEST
+    fprintf(stderr, "******_NXCollectPropertyHandler: Unmatched sequence [%d] for opcode [%d] "
+                "with length [%d].\n", rep -> generic.sequenceNumber, rep -> generic.type,
+                    (int) rep -> generic.length << 2);
+    #endif
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectPropertyHandler: Going to handle asynchronous GetProperty reply.\n");
+  #endif
+
+  /*
+   * Reply data is managed asynchronously. We can
+   * use state to get to vector and vector to get
+   * to handler. In this way, we can dequeue and
+   * free the handler itself.
+   */
+
+  DeqAsyncHandler(dpy, state -> handler);
+
+  Xfree(state -> handler);
+
+  state -> handler = NULL;
+
+  if (rep -> generic.type == X_Error)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******_NXCollectPropertyHandler: Error received from X server for resource [%d].\n",
+                state -> resource);
+    #endif
+
+    _NXNotifyProperty(dpy, state -> resource, False);
+
+    _NXCollectedProperties[state -> resource] = NULL;
+
+    Xfree(state);
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectPropertyHandler: Matched request with sequence [%ld].\n",
+              state -> sequence);
+  #endif
+
+  async_size = SIZEOF(xGetPropertyReply);
+
+  async_head = Xmalloc(async_size);
+
+  if (async_head == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******_NXCollectPropertyHandler: PANIC! Failed to allocate memory with resource [%d].\n",
+                state -> resource);
+    #endif
+
+    _NXNotifyProperty(dpy, state -> resource, False);
+
+    _NXCollectedProperties[state -> resource] = NULL;
+
+    Xfree(state);
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectPropertyHandler: Going to get reply with size [%d].\n",
+              (int) rep -> generic.length << 2);
+  #endif
+
+  async_rep = (xGetPropertyReply *) _XGetAsyncReply(dpy, async_head, rep, buf, len, 0, False);
+
+  if (async_rep == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******_NXCollectPropertyHandler: PANIC! Failed to get reply with resource [%d].\n",
+                state -> resource);
+    #endif
+
+    _NXNotifyProperty(dpy, state -> resource, False);
+
+    _NXCollectedProperties[state -> resource] = NULL;
+
+    Xfree(state);
+
+    Xfree(async_head);
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectPropertyHandler: Got reply with format [%d] type [%d] size [%d].\n",
+              async_rep -> format, (int) async_rep -> propertyType, (int) async_rep -> length << 2);
+
+  fprintf(stderr, "******_NXCollectPropertyHandler: Bytes after [%d] number of items [%d].\n",
+              (int) async_rep -> bytesAfter, (int) async_rep -> nItems);
+  #endif
+
+  state -> format = async_rep -> format;
+  state -> type   = async_rep -> propertyType;
+  state -> items  = async_rep -> nItems;
+  state -> after  = async_rep -> bytesAfter;
+
+  async_size = async_rep -> length << 2;
+
+  if (async_size > 0)
+  {
+    async_data = Xmalloc(async_size);
+
+    if (async_data == NULL)
+    {
+      #ifdef PANIC
+      fprintf(stderr, "******_NXCollectPropertyHandler: PANIC! Failed to allocate memory with resource [%d].\n",
+                  state -> resource);
+      #endif
+
+      _NXNotifyProperty(dpy, state -> resource, False);
+
+      _NXCollectedProperties[state -> resource] = NULL;
+
+      Xfree(state);
+
+      Xfree(async_head);
+
+      return False;
+    }
+
+    #ifdef TEST
+    fprintf(stderr, "******_NXCollectPropertyHandler: Going to get data with size [%d].\n",
+                async_size);
+    #endif
+
+    _XGetAsyncData(dpy, async_data, buf, len, SIZEOF(xGetPropertyReply), async_size, async_size);
+
+    /*
+     * From now on we can return True, as all
+     * data has been consumed from buffer.
+     */
+
+    state -> data = async_data;
+
+    #ifdef TEST
+    fprintf(stderr, "******_NXCollectPropertyHandler: Successfully stored property data for resource [%d].\n",
+                state -> resource);
+    #endif
+  }
+  #ifdef TEST
+  else
+  {
+    fprintf(stderr, "******_NXCollectPropertyHandler: WARNING! Null property data stored for resource [%d].\n",
+                state -> resource);
+  }
+  #endif
+
+  _NXNotifyProperty(dpy, state -> resource, True);
+
+  Xfree(async_head);
+
+  return True;
+}
+
+int NXGetCollectPropertyResource(Display *dpy)
+{
+  int i;
+
+  for (i = 0; i < NXNumberOfResources; i++)
+  {
+    if (_NXCollectedProperties[i] == NULL)
+    {
+      return i;
+    }
+  }
+
+  return -1;
+}
+
+int NXCollectProperty(Display *dpy, unsigned int resource, Window window, Atom property,
+                          long long_offset, long long_length, Bool delete, Atom req_type)
+{
+  register xGetPropertyReq *req;
+
+  _NXCollectPropertyState *state;
+  _XAsyncHandler *handler;
+
+  if (resource >= NXNumberOfResources)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXCollectProperty: PANIC! Provided resource [%u] is out of range.\n",
+                resource);
+    #endif
+
+    return -1;
+  }
+
+  state = _NXCollectedProperties[resource];
+
+  if (state != NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXCollectProperty: PANIC! Having to remove previous state for resource [%u].\n",
+                resource);
+    #endif
+
+    if (state -> handler != NULL)
+    {
+      DeqAsyncHandler(dpy, state -> handler);
+
+      Xfree(state -> handler);
+    }
+
+    if (state -> data != NULL)
+    {
+      Xfree(state -> data);
+    }
+
+    Xfree(state);
+
+    _NXCollectedProperties[resource] = NULL;
+  }
+
+  LockDisplay(dpy);
+
+  GetReq(GetProperty, req);
+
+  req -> delete     = delete;
+  req -> window     = window;
+  req -> property   = property;
+  req -> type       = req_type;
+  req -> longOffset = long_offset;
+  req -> longLength = long_length;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXCollectProperty: Sending message opcode [%d] sequence [%ld] for resource [%d].\n",
+              X_GetProperty, dpy -> request, resource);
+
+  fprintf(stderr, "******NXCollectProperty: Delete [%u] window [%d] property [%d] type [%d].\n",
+              req -> delete, (int) req -> window, (int) req -> property, (int) req -> type);
+
+  fprintf(stderr, "******NXCollectProperty: Long offset [%d] long length [%d].\n",
+              (int) req -> longOffset, (int) req -> longLength);
+  #endif
+
+  state   = Xmalloc(sizeof(_NXCollectPropertyState));
+  handler = Xmalloc(sizeof(_XAsyncHandler));
+
+  if (state == NULL || handler == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXCollectProperty: Failed to allocate memory with resource [%d].\n",
+                resource);
+    #endif
+
+    if (state != NULL)
+    {
+      Xfree(state);
+    }
+
+    if (handler != NULL)
+    {
+      Xfree(handler);
+    }
+
+    UnGetReq(GetProperty);
+
+    UnlockDisplay(dpy);
+
+    return -1;
+  }
+
+  state -> sequence = dpy -> request;
+  state -> resource = resource;
+  state -> window   = window;
+  state -> property = property;
+  state -> type     = 0;
+  state -> format   = 0;
+  state -> items    = 0;
+  state -> after    = 0;
+  state -> data     = NULL;
+
+  state -> handler = handler;
+
+  handler -> next = dpy -> async_handlers;
+  handler -> handler = _NXCollectPropertyHandler;
+  handler -> data = (XPointer) state;
+  dpy -> async_handlers = handler;
+
+  _NXCollectedProperties[resource] = state;
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return True;
+}
+
+int NXGetCollectedProperty(Display *dpy, unsigned int resource, Atom *actual_type_return,
+                               int *actual_format_return, unsigned long *nitems_return,
+                                   unsigned long *bytes_after_return, unsigned char **data)
+{
+  register _NXCollectPropertyState *state;
+
+  state = _NXCollectedProperties[resource];
+
+  if (state == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXGetCollectedProperty: PANIC! No data collected for resource [%u].\n",
+                resource);
+    #endif
+
+    return 0;
+  }
+
+  *actual_type_return   = state -> type;
+  *actual_format_return = state -> format;
+  *nitems_return        = state -> items;
+  *bytes_after_return   = state -> after;
+
+  *data = (unsigned char *) _NXCollectedProperties[resource] -> data;
+
+  Xfree(state);
+
+  _NXCollectedProperties[resource] = NULL;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXGetCollectedProperty: Returning GetProperty data for resource [%u].\n",
+              resource);
+  #endif
+
+  return True;
+}
+
+static void _NXNotifyGrabPointer(Display *dpy, int resource, Bool success)
+{
+  XEvent async_event;
+
+  async_event.type = ClientMessage;
+
+  async_event.xclient.window       = 0;
+  async_event.xclient.message_type = 0;
+  async_event.xclient.format       = 32;
+
+  async_event.xclient.data.l[0] = NXCollectGrabPointerNotify;
+  async_event.xclient.data.l[1] = resource;
+  async_event.xclient.data.l[2] = success;
+
+  XPutBackEvent(dpy, &async_event);
+}
+
+static Bool _NXCollectGrabPointerHandler(Display *dpy, xReply *rep, char *buf,
+                                             int len, XPointer data)
+{
+  register _NXCollectGrabPointerState *state;
+
+  register xGrabPointerReply *async_rep;
+
+  char *async_head;
+
+  int async_size;
+
+  state = (_NXCollectGrabPointerState *) data;
+
+  if ((rep -> generic.sequenceNumber % 65536) !=
+          ((int)(state -> sequence) % 65536))
+  {
+    #ifdef TEST
+    fprintf(stderr, "******_NXCollectGrabPointerHandler: Unmatched sequence [%d] for opcode [%d] "
+                "with length [%d].\n", rep -> generic.sequenceNumber, rep -> generic.type,
+                    (int) rep -> generic.length << 2);
+    #endif
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectGrabPointerHandler: Going to handle asynchronous GrabPointer reply.\n");
+  #endif
+
+  DeqAsyncHandler(dpy, state -> handler);
+
+  Xfree(state -> handler);
+
+  state -> handler = NULL;
+
+  if (rep -> generic.type == X_Error)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******_NXCollectGrabPointerHandler: Error received from X server for resource [%d].\n",
+                state -> resource);
+    #endif
+
+    _NXNotifyGrabPointer(dpy, state -> resource, False);
+
+    _NXCollectedGrabPointers[state -> resource] = NULL;
+
+    Xfree(state);
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectGrabPointerHandler: Matched request with sequence [%ld].\n",
+              state -> sequence);
+  #endif
+
+  async_size = SIZEOF(xGrabPointerReply);
+
+  async_head = Xmalloc(async_size);
+
+  if (async_head == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******_NXCollectGrabPointerHandler: PANIC! Failed to allocate memory with resource [%d].\n",
+                state -> resource);
+    #endif
+
+    _NXNotifyGrabPointer(dpy, state -> resource, False);
+
+    _NXCollectedGrabPointers[state -> resource] = NULL;
+
+    Xfree(state);
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectGrabPointerHandler: Going to get reply with size [%d].\n",
+              (int) rep -> generic.length << 2);
+  #endif
+
+  async_rep = (xGrabPointerReply *) _XGetAsyncReply(dpy, async_head, rep, buf, len, 0, False);
+
+  if (async_rep == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******_NXCollectGrabPointerHandler: PANIC! Failed to get reply with resource [%d].\n",
+                state -> resource);
+    #endif
+
+    _NXNotifyGrabPointer(dpy, state -> resource, False);
+
+    _NXCollectedGrabPointers[state -> resource] = NULL;
+
+    Xfree(state);
+
+    Xfree(async_head);
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectGrabPointerHandler: Got reply with status [%d] size [%d].\n",
+              async_rep -> status, (int) async_rep -> length << 2);
+  #endif
+
+  state -> status = async_rep -> status;
+
+  _NXNotifyGrabPointer(dpy, state -> resource, True);
+
+  Xfree(async_head);
+
+  return True;
+}
+
+int NXGetCollectGrabPointerResource(Display *dpy)
+{
+  int i;
+
+  for (i = 0; i < NXNumberOfResources; i++)
+  {
+    if (_NXCollectedGrabPointers[i] == NULL)
+    {
+      return i;
+    }
+  }
+
+  return -1;
+}
+
+int NXCollectGrabPointer(Display *dpy, unsigned int resource, Window grab_window, Bool owner_events,
+                             unsigned int event_mask, int pointer_mode, int keyboard_mode,
+                                 Window confine_to, Cursor cursor, Time time)
+{
+  register xGrabPointerReq *req;
+
+  _NXCollectGrabPointerState *state;
+  _XAsyncHandler *handler;
+
+  if (resource >= NXNumberOfResources)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXCollectGrabPointer: PANIC! Provided resource [%u] is out of range.\n",
+                resource);
+    #endif
+
+    return -1;
+  }
+
+  state = _NXCollectedGrabPointers[resource];
+
+  if (state != NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXCollectGrabPointer: PANIC! Having to remove previous state for resource [%u].\n",
+                resource);
+    #endif
+
+    if (state -> handler != NULL)
+    {
+      DeqAsyncHandler(dpy, state -> handler);
+
+      Xfree(state -> handler);
+    }
+
+    Xfree(state);
+
+    _NXCollectedGrabPointers[resource] = NULL;
+  }
+
+  LockDisplay(dpy);
+
+  GetReq(GrabPointer, req);
+
+  req -> grabWindow   = grab_window;
+  req -> ownerEvents  = owner_events;
+  req -> eventMask    = event_mask;
+  req -> pointerMode  = pointer_mode;
+  req -> keyboardMode = keyboard_mode;
+  req -> confineTo    = confine_to;
+  req -> cursor       = cursor;
+  req -> time         = time;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXCollectGrabPointer: Sending message opcode [%d] sequence [%ld] "
+              "for resource [%d].\n", X_GrabPointer, dpy -> request, resource);
+  #endif
+
+  state   = Xmalloc(sizeof(_NXCollectGrabPointerState));
+  handler = Xmalloc(sizeof(_XAsyncHandler));
+
+  if (state == NULL || handler == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXCollectGrabPointer: Failed to allocate memory with resource [%d].\n",
+                resource);
+    #endif
+
+    if (state != NULL)
+    {
+      Xfree(state);
+    }
+
+    if (handler != NULL)
+    {
+      Xfree(handler);
+    }
+
+    UnGetReq(GrabPointer);
+
+    UnlockDisplay(dpy);
+
+    return -1;
+  }
+
+  state -> sequence = dpy -> request;
+  state -> resource = resource;
+  state -> status   = 0;
+
+  state -> handler = handler;
+
+  handler -> next = dpy -> async_handlers;
+  handler -> handler = _NXCollectGrabPointerHandler;
+  handler -> data = (XPointer) state;
+  dpy -> async_handlers = handler;
+
+  _NXCollectedGrabPointers[resource] = state;
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return True;
+}
+
+int NXGetCollectedGrabPointer(Display *dpy, unsigned int resource, int *status)
+{
+  register _NXCollectGrabPointerState *state;
+
+  state = _NXCollectedGrabPointers[resource];
+
+  if (state == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXGetCollectedGrabPointer: PANIC! No data collected for resource [%u].\n",
+                resource);
+    #endif
+
+    return 0;
+  }
+
+  *status = state -> status;
+
+  Xfree(state);
+
+  _NXCollectedGrabPointers[resource] = NULL;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXGetCollectedGrabPointer: Returning GrabPointer data for resource [%u].\n",
+              resource);
+  #endif
+
+  return True;
+}
+
+static void _NXNotifyInputFocus(Display *dpy, int resource, Bool success)
+{
+  XEvent async_event;
+
+  async_event.type = ClientMessage;
+
+  async_event.xclient.window       = 0;
+  async_event.xclient.message_type = 0;
+  async_event.xclient.format       = 32;
+
+  async_event.xclient.data.l[0] = NXCollectInputFocusNotify;
+  async_event.xclient.data.l[1] = resource;
+  async_event.xclient.data.l[2] = success;
+
+  XPutBackEvent(dpy, &async_event);
+}
+
+static Bool _NXCollectInputFocusHandler(Display *dpy, xReply *rep, char *buf,
+                                            int len, XPointer data)
+{
+  register _NXCollectInputFocusState *state;
+
+  register xGetInputFocusReply *async_rep;
+
+  char *async_head;
+
+  int async_size;
+
+  state = (_NXCollectInputFocusState *) data;
+
+  if ((rep -> generic.sequenceNumber % 65536) !=
+          ((int)(state -> sequence) % 65536))
+  {
+    #ifdef TEST
+    fprintf(stderr, "******_NXCollectInputFocusHandler: Unmatched sequence [%d] for opcode [%d] "
+                "with length [%d].\n", rep -> generic.sequenceNumber, rep -> generic.type,
+                    (int) rep -> generic.length << 2);
+    #endif
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectInputFocusHandler: Going to handle asynchronous GetInputFocus reply.\n");
+  #endif
+
+  DeqAsyncHandler(dpy, state -> handler);
+
+  Xfree(state -> handler);
+
+  state -> handler = NULL;
+
+  if (rep -> generic.type == X_Error)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******_NXCollectInputFocusHandler: Error received from X server for resource [%d].\n",
+                state -> resource);
+    #endif
+
+    _NXNotifyInputFocus(dpy, state -> resource, False);
+
+    _NXCollectedInputFocuses[state -> resource] = NULL;
+
+    Xfree(state);
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectInputFocusHandler: Matched request with sequence [%ld].\n",
+              state -> sequence);
+  #endif
+
+  async_size = SIZEOF(xGetInputFocusReply);
+
+  async_head = Xmalloc(async_size);
+
+  if (async_head == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******_NXCollectInputFocusHandler: PANIC! Failed to allocate memory with resource [%d].\n",
+                state -> resource);
+    #endif
+
+    _NXNotifyInputFocus(dpy, state -> resource, False);
+
+    _NXCollectedInputFocuses[state -> resource] = NULL;
+
+    Xfree(state);
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectInputFocusHandler: Going to get reply with size [%d].\n",
+              (int) rep -> generic.length << 2);
+  #endif
+
+  async_rep = (xGetInputFocusReply *) _XGetAsyncReply(dpy, async_head, rep, buf, len, 0, False);
+
+  if (async_rep == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******_NXCollectInputFocusHandler: PANIC! Failed to get reply with resource [%d].\n",
+                state -> resource);
+    #endif
+
+    _NXNotifyInputFocus(dpy, state -> resource, False);
+
+    _NXCollectedInputFocuses[state -> resource] = NULL;
+
+    Xfree(state);
+
+    Xfree(async_head);
+
+    return False;
+  }
+
+  #ifdef TEST
+  fprintf(stderr, "******_NXCollectInputFocusHandler: Got reply with focus [%d] revert to [%d] "
+              "size [%d].\n", (int) async_rep -> focus, (int) async_rep -> revertTo,
+                  (int) async_rep -> length << 2);
+  #endif
+
+  state -> focus     = async_rep -> focus;
+  state -> revert_to = async_rep -> revertTo;
+
+  _NXNotifyInputFocus(dpy, state -> resource, True);
+
+  Xfree(async_head);
+
+  return True;
+}
+
+int NXGetCollectInputFocusResource(Display *dpy)
+{
+  int i;
+
+  for (i = 0; i < NXNumberOfResources; i++)
+  {
+    if (_NXCollectedInputFocuses[i] == NULL)
+    {
+      return i;
+    }
+  }
+
+  return -1;
+}
+
+int NXCollectInputFocus(Display *dpy, unsigned int resource)
+{
+  register xReq *req;
+
+  _NXCollectInputFocusState *state;
+  _XAsyncHandler *handler;
+
+  if (resource >= NXNumberOfResources)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXCollectInputFocus: PANIC! Provided resource [%u] is out of range.\n",
+                resource);
+    #endif
+
+    return -1;
+  }
+
+  state = _NXCollectedInputFocuses[resource];
+
+  if (state != NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXCollectInputFocus: PANIC! Having to remove previous state for resource [%u].\n",
+                resource);
+    #endif
+
+    if (state -> handler != NULL)
+    {
+      DeqAsyncHandler(dpy, state -> handler);
+
+      Xfree(state -> handler);
+    }
+
+    Xfree(state);
+
+    _NXCollectedInputFocuses[resource] = NULL;
+  }
+
+  LockDisplay(dpy);
+
+  GetEmptyReq(GetInputFocus, req);
+
+  #ifdef TEST
+  fprintf(stderr, "******NXCollectInputFocus: Sending message opcode [%d] sequence [%ld] for resource [%d].\n",
+              X_GetInputFocus, dpy -> request, resource);
+  #endif
+
+  state   = Xmalloc(sizeof(_NXCollectInputFocusState));
+  handler = Xmalloc(sizeof(_XAsyncHandler));
+
+  if (state == NULL || handler == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXCollectInputFocus: Failed to allocate memory with resource [%d].\n",
+                resource);
+    #endif
+
+    if (state != NULL)
+    {
+      Xfree(state);
+    }
+
+    if (handler != NULL)
+    {
+      Xfree(handler);
+    }
+
+    UnGetEmptyReq();
+
+    UnlockDisplay(dpy);
+
+    return -1;
+  }
+
+  state -> sequence  = dpy -> request;
+  state -> resource  = resource;
+  state -> focus     = 0;
+  state -> revert_to = 0;
+
+  state -> handler = handler;
+
+  handler -> next = dpy -> async_handlers;
+  handler -> handler = _NXCollectInputFocusHandler;
+  handler -> data = (XPointer) state;
+  dpy -> async_handlers = handler;
+
+  _NXCollectedInputFocuses[resource] = state;
+
+  UnlockDisplay(dpy);
+
+  SyncHandle();
+
+  return True;
+}
+
+int NXGetCollectedInputFocus(Display *dpy, unsigned int resource,
+                                 Window *focus_return, int *revert_to_return)
+{
+  register _NXCollectInputFocusState *state;
+
+  state = _NXCollectedInputFocuses[resource];
+
+  if (state == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******NXGetCollectedInputFocus: PANIC! No data collected for resource [%u].\n",
+                resource);
+    #endif
+
+    return 0;
+  }
+
+  *focus_return     = state -> focus;
+  *revert_to_return = state -> revert_to;
+
+  Xfree(state);
+
+  _NXCollectedInputFocuses[resource] = NULL;
+
+  #ifdef TEST
+  fprintf(stderr, "******NXGetCollectedInputFocus: Returning GetInputFocus data for resource [%u].\n",
+              resource);
+  #endif
+
+  return True;
+}
+
+#ifdef DUMP
+
+void _NXDumpData(const unsigned char *buffer, unsigned int size)
+{
+  if (buffer != NULL)
+  {
+    unsigned int i = 0;
+
+    unsigned int ii;
+
+    while (i < size)
+    {
+      fprintf(stderr, "[%d]\t", i);
+
+      for (ii = 0; i < size && ii < 8; i++, ii++)
+      {
+        fprintf(stderr, "%d\t", (unsigned int) (buffer[i]));
+      }
+
+      fprintf(stderr, "\n");
+    }
+  }
+}
+
+#endif
diff --git a/nxcompext/NXlib.h b/nxcompext/NXlib.h
new file mode 100644
index 000000000..d77ff6046
--- /dev/null
+++ b/nxcompext/NXlib.h
@@ -0,0 +1,904 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef NXlib_H
+#define NXlib_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <X11/X.h>
+#include <X11/Xlib.h>
+
+#include "NX.h"
+#include "NXpack.h"
+#include "NXproto.h"
+#include "NXvars.h"
+
+/*
+ * All the NX code should use these.
+ */
+
+#define Xmalloc(size) malloc((size))
+#define Xfree(ptr)    free((ptr))
+ 
+/*
+ * Maximum number of supported pack methods.
+ */
+
+#define NXNumberOfPackMethods  128
+
+/*
+ * Assume this as the limit of resources that
+ * can be provided to the split and unpack
+ * requests.
+ */
+
+#define NXNumberOfResources    256
+
+#define NXNoResource           256 + 1
+#define NXAnyResource          256 + 2
+
+/*
+ * Initialize the internal structures used by
+ * the library. Should be executed again after
+ * having reopened the display.
+ */
+
+extern int NXInitDisplay(
+#if NeedFunctionPrototypes
+    Display*            /* display */
+#endif
+);
+
+/*
+ * Reset all the internal structures. Should be
+ * executed after closing the display.
+ */
+
+extern int NXResetDisplay(
+#if NeedFunctionPrototypes
+    Display*            /* display */
+#endif
+);
+
+/*
+ * Set the NX display flush policy. The policy can
+ * be either NXFlushDeferred or NXFlushImmediate.
+ */
+
+extern int NXSetDisplayPolicy(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    int                 /* policy */
+#endif
+);
+
+/*
+ * Set the display output buffer size.
+ */
+
+extern int NXSetDisplayBuffer(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    int                 /* size */
+#endif
+);
+
+/*
+ * If set, the Popen() function in the X server
+ * wil remove the LD_LIBRARY_PATH variable from
+ * the environment before calling the execl()
+ * function on the child process. The function
+ * returns the previous value.
+ */
+
+extern int NXUnsetLibraryPath(
+#if NeedFunctionPrototypes
+    int                 /* value */
+#endif
+);
+
+/*
+ * If the parameter is true, the Xlib I/O error
+ * handler will return, instead of quitting the
+ * program. The function returns the previous
+ * value.
+ */
+
+extern int NXHandleDisplayError(
+#if NeedFunctionPrototypes
+    int                 /* value */
+#endif
+);
+
+/*
+ * Shutdown the display descriptor and force Xlib
+ * to set the I/O error flag.
+ */
+
+extern Bool NXForceDisplayError(
+#if NeedFunctionPrototypes
+    Display*            /* display */
+#endif
+);
+
+/*
+ * Check the value of the XlibDisplayIOError flag.
+ * If not set, try to call the display error hand-
+ * ler to give to the application a chance to see
+ * whether it needs to close the connection.
+ */
+
+extern int NXDisplayError(
+#if NeedFunctionPrototypes
+    Display*            /* display */
+#endif
+);
+
+/*
+ * Query the number of bytes readable from the
+ * display connection.
+ */
+
+extern int NXDisplayReadable(
+#if NeedFunctionPrototypes
+    Display*            /* display */
+#endif
+);
+
+/*
+ * Query the number of the outstanding bytes to
+ * flush to the display connection.
+ */
+
+extern int NXDisplayFlushable(
+#if NeedFunctionPrototypes
+    Display*            /* display */
+#endif
+);
+
+/*
+ * Return a value between 0 and 9 indicating the
+ * congestion level of the NX transport based on
+ * the tokens remaining. A value of 9 means that
+ * the link is congested and no further data can
+ * be sent.
+ */
+
+extern int NXDisplayCongestion(
+#if NeedFunctionPrototypes
+    Display*            /* display */
+#endif
+);
+
+/*
+ * Flush the Xlib display buffer and/or the
+ * outstanding data accumulated by the NX
+ * transport.
+ */
+
+extern int NXFlushDisplay(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    int                 /* what */
+#endif
+);
+
+/*
+ * Public interfaces used to set the handlers.
+ * They all return the previous handler.
+ */
+
+extern NXDisplayErrorPredicate NXSetDisplayErrorPredicate(
+#if NeedFunctionPrototypes
+    NXDisplayErrorPredicate /* predicate */
+#endif
+);
+
+/*
+ * Called when the display blocks waiting to read or
+ * write more data.
+ */
+
+extern NXDisplayBlockHandler NXSetDisplayBlockHandler(
+#if NeedFunctionPrototypes
+    NXDisplayBlockHandler /* handler */
+#endif
+);
+
+/*
+ * Called after more data is written to the display.
+ * When the NX transport is running, data may be queued
+ * until an explicit flush.
+ */
+
+extern NXDisplayWriteHandler NXSetDisplayWriteHandler(
+#if NeedFunctionPrototypes
+    NXDisplayWriteHandler /* handler */
+#endif
+);
+
+/*
+ * Called after more data is sent to the remote proxy.
+ *
+ * Here the display pointer is passed as the second
+ * parameter to make clear that the function does not
+ * tie the callback to the display, but, similarly to
+ * all the Xlib error handlers, to a global variable
+ * shared by all the Xlib functions. The display
+ * pointer will be passed back by nxcomp at the time
+ * it will call the handler. This is because nxcomp
+ * doesn't have access to the display structure.
+ */
+
+extern NXDisplayFlushHandler NXSetDisplayFlushHandler(
+#if NeedFunctionPrototypes
+    NXDisplayFlushHandler      /* handler */,
+    Display*                   /* display */
+#endif
+);
+
+/*
+ * Get an arbitrary null terminated buffer to be added
+ * to the NX statistics.
+ */
+
+extern NXDisplayStatisticsHandler NXSetDisplayStatisticsHandler(
+#if NeedFunctionPrototypes
+    NXDisplayStatisticsHandler /* handler */,
+    char **                    /* buffer */
+#endif
+);
+
+/*
+ * Redefine the function called by Xlib in the case of
+ * an out-of-order sequence number received in the X
+ * protocol stream.
+ */
+ 
+extern NXLostSequenceHandler NXSetLostSequenceHandler(
+#if NeedFunctionPrototypes
+    NXLostSequenceHandler /* handler */
+#endif
+);
+
+/*
+ * The agent should get the NX parameters at startup, just after
+ * having opened the display. If the agent is not able to satisfy
+ * the pack method set by user (because a method is not applica-
+ * ble, it is not supported by the remote or it simply requires a
+ * screen depth greater than the depth available), it should fall
+ * back to the nearest method of the same type.
+ */
+
+extern Status NXGetControlParameters(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int*       /* link_type */,
+    unsigned int*       /* local_major */,
+    unsigned int*       /* local_minor */,
+    unsigned int*       /* local_patch */,
+    unsigned int*       /* remote_major */,
+    unsigned int*       /* remote_minor */,
+    unsigned int*       /* remote_patch */,
+    int*                /* frame_timeout */,
+    int*                /* ping_timeout */,
+    int*                /* split_mode */,
+    int*                /* split_size */,
+    unsigned int*       /* pack_method */,
+    unsigned int*       /* pack_quality */,
+    int*                /* data_level */,
+    int*                /* stream_level */,
+    int*                /* delta_level */,
+    unsigned int*       /* load_cache */,
+    unsigned int*       /* save_cache */,
+    unsigned int*       /* startup_cache */
+#endif
+);
+
+/*
+ * Which unpack methods are supported by the remote proxy?
+ */
+
+extern Status NXGetUnpackParameters(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int*       /* entries */,
+    unsigned char[]     /* supported_methods */
+#endif
+);
+
+/*
+ * Query and enable shared memory support on path agent to X
+ * client proxy and X server proxy to real X server. At the
+ * moment only the path proxy to real X server is implemented.
+ * On return flags will say if support has been successfully
+ * activated. Segments will contain the XID associated to the
+ * shared memory blocks. A MIT-SHM compliant protocol is used
+ * between proxy and the real server, while a simplified
+ * version is used between the agent and the client proxy to
+ * accomodate both packed images and plain X bitmaps.
+ */
+
+extern Status NXGetShmemParameters(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int*       /* enable_client  */,
+    unsigned int*       /* enable_server */,
+    unsigned int*       /* client_segment */,
+    unsigned int*       /* server_segment */,
+    unsigned int*       /* client_size */,
+    unsigned int*       /* server_size */
+#endif
+);
+
+/*
+ * Get the path to the font server that can be used by the X
+ * server to tunnel the font connections across the NX link.
+ * The path actually represents the TCP port where the proxy
+ * on the NX client side is listening. The agent can tempora-
+ * rily enable the tunneling when it needs a font that is not
+ * available on the client, for example when the session is
+ * migrated from a different X server.
+ */
+
+extern Status NXGetFontParameters(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* path_length */,
+    char[]              /* path_data */
+#endif
+);
+
+/*
+ * This set of functions is used to leverage the image stream-
+ * ing capabilities built in nxcomp. An image can be streamed
+ * by sending a start-split message, followed by the X messages
+ * that will have to be split by the proxy, followed by an end-
+ * split closure. Usually, in the middle of a start-split/end-
+ * split sequence there will be a single PutImage() or PutPack-
+ * edImage(), that, in turn, can generate multiple partial
+ * requests, like a SetUnpackColormap() and SetUnpackAlpha()
+ * that will be later used to decompress the image to its ori-
+ * ginal form. Multiple requests may be also generated because
+ * of the maximum size of a X request being exceeded, so that
+ * Xlib has to divide the single image in multiple sub-image re-
+ * quests. The agent doesn't need to take care of these details
+ * but will rather have to track the result of the split opera-
+ * tion. By monitoring the notify events sent by the proxy, the
+ * agent will have to implement its own strategy to deal with
+ * the resources. For example, it will be able to:
+ *
+ * - Mark a drawable as dirty, if the image was not sent
+ *   synchronously, in the main X oputput stream.
+ *
+ * - Choose to commit or discard the original image, at the
+ *   time it will be recomposed at the remote side. This may
+ *   include all the messages that were part of the split
+ *   (the colormap, the alpha channel, etc.)
+ *
+ * - Mark the drawable as clean again, if the image was
+ *   committed and the drawable didn't change in the mean-
+ *   while.
+ *
+ * At the time the proxy receives the end-split, it reports the
+ * result of the operation to the agent. The agent will be able
+ * to identify the original split operation (the one referenced
+ * in the start-split/end-split sequence) by the small integer
+ * number (0-255) named 'resource' sent in the events.
+ *
+ * One of the following cases may be encountered:
+ *
+ *
+ * NXNoSplitNotify      All messages were sent in the main out-
+ *                      put stream, so that no split actually
+ *                      took place.
+ *
+ * NXStartSplitNotify   One or more messages were split, so,
+ *                      at discrection of the agent, the client
+ *                      may be suspended until the transferral
+ *                      is completed.
+ *
+ * NXCommitSplitNotify  One of the requests that made up the
+ *                      split was recomposed. The agent should
+ *                      either commit the given request or tell
+ *                      the proxy to discard it.
+ *
+ * NXEndSplitNotify     The split was duly completed. The agent
+ *                      can restart the client.
+ *
+ * NXEmptySplitNotify   No more split operation are pending.
+ *                      The agent can use this information to
+ *                      implement specific strategies requiring
+ *                      that all messages have been recomposed
+ *                      at the remote end, like updating the
+ *                      drawables that were not synchronized
+ *                      because of the lazy encoding.
+ *
+ * The 'mode' field that is sent by the agent in the start-split
+ * request, determines the strategy that the proxy will adopt to
+ * deal with the image. If set to 'eager', the proxy will only
+ * split the messages whose size exceeds the split threshold (the
+ * current threshold can be found in the NXGetControlParameters()
+ * reply). If the mode is set to lazy, the proxy will split any
+ * image that would have generated an actual transfer of the data
+ * part (in practice all images that are not found in the cache).
+ * This second strategy can be leveraged by an agent to further
+ * reduce the bandwidth requirements. For example, by setting the
+ * mode to lazy and by monitoring the result, an agent can easi-
+ * ly verify if the drawable was successfully updated, mark the
+ * drawable if not, and synchronize it at later time.
+ *
+ * See NXproto.h for the definition of the available modes.
+ */
+
+extern unsigned int NXAllocSplit(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */
+#endif
+);
+
+extern int NXStartSplit(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    unsigned int        /* mode */
+#endif
+);
+
+extern int NXEndSplit(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */
+#endif
+);
+
+extern int NXCommitSplit(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    unsigned int        /* propagate */,
+    unsigned char       /* request */,
+    unsigned int        /* position */
+#endif
+);
+
+extern int NXAbortSplit(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */
+#endif
+);
+
+extern int NXFinishSplit(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */
+#endif
+);
+
+extern int NXFreeSplit(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */
+#endif
+);
+
+extern int NXSetExposeParameters(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    int                 /* expose */,
+    int                 /* graphics_expose */,
+    int                 /* no_expose */
+#endif
+);
+
+extern int NXSetCacheParameters(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    int                 /* enable_cache */,
+    int                 /* enable_split */,
+    int                 /* enable_save */,
+    int                 /* enable_load */
+#endif
+);
+
+extern unsigned int NXAllocUnpack(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */
+#endif
+);
+
+extern int NXSetUnpackGeometry(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    Visual*             /* visual */
+#endif
+);
+
+extern int NXSetUnpackColormap(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    unsigned int        /* method */,
+    unsigned int        /* entries */,
+    const char*         /* data */,
+    unsigned int        /* data_length */
+#endif
+);
+
+extern int NXSetUnpackAlpha(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    unsigned int        /* method */,
+    unsigned int        /* entries */,
+    const char*         /* data */,
+    unsigned int        /* data_length */
+#endif
+);
+
+extern int NXSetUnpackColormapCompat(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    unsigned int        /* entries */,
+    const char*         /* data */
+#endif
+);
+
+extern int NXSetUnpackAlphaCompat(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    unsigned int        /* entries */,
+    const char*         /* data */
+#endif
+);
+
+extern int NXFreeUnpack(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */
+#endif
+);
+
+/*
+ * A packed image is a XImage but with
+ * offset field containing total amount
+ * of packed image data.
+ */
+
+typedef XImage NXPackedImage;
+
+NXPackedImage *NXCreatePackedImage(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    Visual*             /* visual */,
+    unsigned int        /* method */,
+    unsigned int        /* depth */,
+    int                 /* format */,
+    char*               /* data */,
+    int                 /* data_length */,
+    unsigned int        /* width */,
+    unsigned int        /* height */,
+    int                 /* bitmap_pad */,
+    int                 /* bytes_per_line */
+#endif
+);
+
+extern int NXDestroyPackedImage(
+#if NeedFunctionPrototypes
+    NXPackedImage*      /* image */
+#endif
+);
+
+NXPackedImage *NXPackImage(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    XImage*             /* src_image */,
+    unsigned int        /* method */
+#endif
+);
+
+NXPackedImage *NXInPlacePackImage(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    XImage*             /* src_image */,
+    unsigned int        /* method */
+#endif
+);
+
+/*
+ * GC is declared void * to get rid of mess
+ * with different GC definitions in some X
+ * server code (like in nxagent).
+ */
+
+extern int NXPutPackedImage(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    Drawable            /* drawable */,
+    void*               /* gc */,
+    NXPackedImage*      /* image */,
+    unsigned int        /* method */,
+    unsigned int        /* depth */,
+    int                 /* src_x */,
+    int                 /* src_y */,
+    int                 /* dst_x */,
+    int                 /* dst_y */,
+    unsigned int        /* width */,
+    unsigned int        /* height */
+#endif
+);
+
+/*
+ * Get multiple colors with a single call by
+ * pipelining X_AllocColor requests/replies.
+ */
+
+extern int NXAllocColors(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    Colormap            /* colormap */,
+    unsigned int        /* entries */,
+    XColor[]            /* screens_in_out */,
+    Bool []             /* flags allocation errors */
+#endif
+);
+
+/*
+ * Encode the data in the given format.
+ */
+
+extern char *NXEncodeColormap(
+#if NeedFunctionPrototypes
+    const char*         /* src_data */,
+    unsigned int        /* src_size */,
+    unsigned int*       /* dst_size */
+#endif
+);
+
+extern char *NXEncodeAlpha(
+#if NeedFunctionPrototypes
+    const char*         /* src_data */,
+    unsigned int        /* src_size */,
+    unsigned int*       /* dst_size */
+#endif
+);
+
+extern NXPackedImage *NXEncodeRgb(
+#if NeedFunctionPrototypes
+    XImage*             /* src_image */,
+    unsigned int        /* method */,
+    unsigned int        /* quality */
+#endif
+);
+
+extern NXPackedImage *NXEncodeRle(
+#if NeedFunctionPrototypes
+    XImage*             /* src_image */,
+    unsigned int        /* method */,
+    unsigned int        /* quality */
+#endif
+);
+
+extern NXPackedImage *NXEncodeJpeg(
+#if NeedFunctionPrototypes
+    XImage*             /* src_image */,
+    unsigned int        /* method */,
+    unsigned int        /* quality */
+#endif
+);
+
+typedef struct
+{
+  long pixel;
+  int found;
+
+} NXColorTable;
+
+extern int NXEncodeColors(
+#if NeedFunctionPrototypes
+  XImage*                 /* src_image */,
+  NXColorTable*           /* color_table */,
+  int                     /* nb_max */
+#endif
+);
+
+extern NXPackedImage *NXEncodePng(
+#if NeedFunctionPrototypes
+    XImage*             /* src_image */,
+    unsigned int        /* method */,
+    unsigned int        /* quality */
+#endif
+);
+
+extern NXPackedImage *NXEncodeBitmap(
+#if NeedFunctionPrototypes
+    XImage*             /* src_image */,
+    unsigned int        /* method */,
+    unsigned int        /* quality */
+#endif
+);
+
+extern int NXCleanImage(
+#if NeedFunctionPrototypes
+    XImage*
+#endif
+);
+
+extern void NXMaskImage(
+#if NeedFunctionPrototypes
+    XImage*              /* pointer to image to mask */ ,
+    unsigned int         /* method */
+#endif
+);
+
+extern int NXImageCacheSize;
+
+extern void NXInitCache(
+#if NeedFunctionPrototypes
+    Display*             /* display */,
+    int                  /* entries in image cache */
+#endif
+);
+
+extern void NXFreeCache(
+#if NeedFunctionPrototypes
+    Display*             /* display */
+#endif
+);
+
+extern XImage *NXCacheFindImage(
+#if NeedFunctionPrototypes
+    NXPackedImage*       /* packed image to find */,
+    unsigned int*        /* pointer to the pack method if found */,
+    unsigned char**      /* pointer to the calculated MD5 if found */
+#endif
+);
+
+extern int NXCacheAddImage(
+#if NeedFunctionPrototypes
+    NXPackedImage*       /* packed image to be added to the cache */,
+    unsigned int         /* pack method of the image to add */,
+    unsigned char*       /* pointer to MD5 of the original unpacked image */
+#endif
+);
+
+
+extern int NXGetCollectImageResource(
+#if NeedFunctionPrototypes
+    Display*            /* display */
+#endif
+);
+
+extern int NXCollectImage(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    Drawable            /* drawable */,
+    int                 /* src_x */,
+    int                 /* src_y */,
+    unsigned int        /* width */,
+    unsigned int        /* height */,
+    unsigned long       /* plane_mask */,
+    int                 /* format */
+#endif
+);
+
+extern int NXGetCollectedImage(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    XImage**            /* image */
+#endif
+);
+
+extern int NXGetCollectPropertyResource(
+#if NeedFunctionPrototypes
+    Display*            /* display */
+#endif
+);
+
+extern int NXCollectProperty(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    Window              /* window */,
+    Atom                /* property */,
+    long                /* long_offset */,
+    long                /* long_length */,
+    Bool                /* delete */,
+    Atom                /* req_type */
+#endif
+);
+
+extern int NXGetCollectedProperty(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    Atom*               /* actual_type_return */,
+    int*                /* actual_format_return */,
+    unsigned long*      /* nitems_return */,
+    unsigned long*      /* bytes_after_return */,
+    unsigned char**     /* data */
+#endif
+);
+
+extern int NXGetCollectGrabPointerResource(
+#if NeedFunctionPrototypes
+    Display*            /* display */
+#endif
+);
+
+extern int NXCollectGrabPointer(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    Window              /* grab_window */,
+    Bool                /* owner_events */,
+    unsigned int        /* event_mask */,
+    int                 /* pointer_mode */,
+    int                 /* keyboard_mode */,
+    Window              /* confine_to */,
+    Cursor              /* cursor */,
+    Time                /* time */
+#endif
+);
+
+extern int NXGetCollectedGrabPointer(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    int*                /* status */
+#endif
+);
+
+extern int NXGetCollectInputFocusResource(
+#if NeedFunctionPrototypes
+    Display*            /* display */
+#endif
+);
+
+extern int NXCollectInputFocus(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */
+#endif
+);
+
+extern int NXGetCollectedInputFocus(
+#if NeedFunctionPrototypes
+    Display*            /* display */,
+    unsigned int        /* resource */,
+    Window*             /* focus_return */,
+    int*                /* revert_to_return */
+#endif
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NXlib_H */
diff --git a/nxcompext/NXlibint.h b/nxcompext/NXlibint.h
new file mode 100644
index 000000000..37ba63723
--- /dev/null
+++ b/nxcompext/NXlibint.h
@@ -0,0 +1,31 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef NXlibint_H
+#define NXlibint_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "NXvars.h"
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NXlibint_H */
diff --git a/nxcompext/Pgn.c b/nxcompext/Pgn.c
new file mode 100644
index 000000000..db14f51e3
--- /dev/null
+++ b/nxcompext/Pgn.c
@@ -0,0 +1,721 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "Xutil.h"
+
+#include "NXlib.h"
+
+#include "Mask.h"
+#include "Pgn.h"
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+/*
+ * Selected ZLIB compression level.
+ */
+
+#define PNG_Z_LEVEL   4
+
+/*
+ * Local function prototypes.
+ */
+
+static void PrepareRowForPng(CARD8 *dst, int y, int count);
+static void PrepareRowForPng24(CARD8 *dst, int y, int count);
+static void PrepareRowForPng16(CARD8 *dst, int y, int count);
+static void PrepareRowForPng32(CARD8 *dst, int y, int count);
+
+static void PngWriteData(png_structp png_ptr, png_bytep data, png_size_t length);
+static void PngFlushData(png_structp png_ptr);
+
+/*
+ * Image characteristics.
+ */
+
+static int bytesPerLine;
+static int byteOrder;
+
+static CARD8 bitsPerPixel;
+static CARD16 redMax, greenMax, blueMax;
+static CARD8 redShift, greenShift, blueShift;
+
+/*
+ * Other variables used for the Png
+ * encoding.
+ */
+
+png_byte    color_type;
+png_structp png_ptr;
+png_infop   info_ptr;
+png_colorp  palette;
+static char *pngCompBuf;
+static int  pngDataLen;
+static char *pngBeforeBuf = NULL;
+
+/*
+ * Allocate data for the compressed image.
+ * We need to ensure that there is enough
+ * space to include the palette and the
+ * header.
+ */
+
+#define PNG_DEST_SIZE(width, height) ((width) * 3 * (height) + 1024 + 256)
+
+/*
+ * Just for debug purposes.
+ */
+
+#ifdef DEBUG
+
+static int  pngId;
+static char pngName[10];
+static FILE *pngFile;
+
+#endif
+
+int PngCompareColorTable(NXColorTable *c1, NXColorTable *c2)
+{
+  return (c1 -> pixel - c2 -> pixel);
+}
+
+#define NB_COLOR_MAX 256
+
+int NXCreatePalette32(XImage *src_image, NXColorTable *color_table, CARD8 *image_index, int nb_max)
+{
+  int    x, y, t, p;
+  CARD8 *fbptr;
+  CARD32 pixel;
+
+  fbptr = (CARD8 *) (src_image -> data);
+
+  /*
+   * TODO: Find a more intelligent way to
+   * estimate the number of colors.
+   */
+
+  memset(color_table, 0, nb_max * sizeof(NXColorTable));
+
+  for (x = 0, p = 0; x < src_image -> height; x++)
+  {
+    for (y = 0; y < src_image -> width; y++)
+    {
+      if (byteOrder == LSBFirst)
+      {
+        pixel = (CARD32) *(fbptr + 3);
+        pixel = (pixel << 8) | (CARD32) *(fbptr + 2);
+        pixel = (pixel << 8) | (CARD32) *(fbptr + 1);
+        pixel = (pixel << 8) | (CARD32) *fbptr;
+      }
+      else
+      {
+        pixel = (CARD32) *fbptr;
+        pixel = (pixel << 8) | (CARD32) *(fbptr + 1);
+        pixel = (pixel << 8) | (CARD32) *(fbptr + 2);
+        pixel = (pixel << 8) | (CARD32) *(fbptr + 3);
+      }
+
+      fbptr += 4;
+
+      for (t = 0; t < nb_max; t++)
+      {
+        if (color_table[t].found == 0)
+        {
+          color_table[t].pixel =  pixel;
+          color_table[t].found =  1;
+          p++;
+          image_index[((x * src_image -> width) + y)] = t;
+
+          break;
+        }
+        else if ((CARD32)(color_table[t].pixel) == pixel)
+        {
+          image_index[((x * src_image -> width) + y)] = t;
+
+          break;
+        }
+      }
+
+      if (p == nb_max)
+      {
+        return nb_max + 1;
+      }
+    }
+  }
+  return p;
+}
+
+int NXCreatePalette16(XImage *src_image, NXColorTable *color_table, CARD8 *image_index, int nb_max)
+{
+  int    x, y, t, p;
+  CARD8 *fbptr;
+  CARD16 pixel;
+
+  fbptr = (CARD8 *) (src_image -> data);
+
+  /*
+   * TODO: Find a more intelligent way to
+   * estimate the number of colors.
+   */
+
+  memset(color_table, 0, nb_max * sizeof(NXColorTable));
+
+  for (x = 0, p = 0; x < src_image -> height; x++)
+  {
+    for (y = 0; y < src_image -> width; y++)
+    {
+      if (byteOrder == LSBFirst)
+      {
+        pixel = (CARD16) *(fbptr + 1);
+        pixel = (pixel << 8) | (CARD16) *fbptr;
+      }
+      else
+      {
+        pixel = (CARD16) *fbptr;
+        pixel = (pixel << 8) | (CARD16) *(fbptr + 1);
+      }
+
+      fbptr += 2;
+
+      for (t = 0; t < nb_max; t++)
+      {
+        if (color_table[t].found == 0)
+        {
+          color_table[t].pixel =  pixel;
+          color_table[t].found =  1;
+          p++;
+          image_index[((x * src_image -> width) + y)] = t;
+
+          break;
+        }
+        else if ((color_table[t].pixel) == pixel)
+        {
+          image_index[((x * src_image -> width) + y)] = t;
+
+          break;
+        }
+      }
+
+      /*
+       * In case the number of 16bit words is not even
+       * we have 2 padding bytes that we have to skip.
+       */
+
+      if ((y == src_image -> width - 1) && (src_image -> width % 2 == 1)) fbptr += 2;
+
+      if (p == nb_max)
+      {
+        return nb_max + 1;
+      }
+    }
+  }
+
+  return p;
+}
+
+char *PngCompressData(XImage *image, int *compressed_size)
+{
+  unsigned int num = 0;
+  CARD8        *srcBuf;
+
+  int dy, w, h;
+
+  int nb_colors;
+
+  NXColorTable color_table[NB_COLOR_MAX];
+  CARD8       *image_index;
+
+  image_index = (CARD8 *) malloc((image -> height) * (image -> width) * sizeof(CARD8));
+
+  /*
+   * TODO: Be sure the padded bytes are cleaned.
+   * It would be better to set to zero the bytes
+   * that are not alligned to the word boundary
+   * at the end of the procedure.
+   */
+
+  memset(image_index, 0, (image -> height) * (image -> width) * sizeof(CARD8));
+
+  *compressed_size = 0;
+
+  pngDataLen = 0;
+
+  /*
+   * Initialize the image stuff.
+   */
+
+  bitsPerPixel = image -> bits_per_pixel;
+  bytesPerLine = image -> bytes_per_line;
+  byteOrder = image -> byte_order;
+
+  if (bitsPerPixel < 15)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******PngCompressData: PANIC! Can't compress images with [%d] bits per pixel.\n",
+                bitsPerPixel);
+    #endif
+
+    return NULL;
+  }
+
+  redShift   = FindLSB(image -> red_mask)   - 1;
+  greenShift = FindLSB(image -> green_mask) - 1;
+  blueShift  = FindLSB(image -> blue_mask)  - 1;
+
+  redMax   = image -> red_mask   >> redShift;
+  greenMax = image -> green_mask >> greenShift;
+  blueMax  = image -> blue_mask  >> blueShift;
+
+  w             = image -> width;
+  h             = image -> height;
+  pngBeforeBuf  = image -> data;
+
+  #ifdef DEBUG
+  fprintf(stderr, "******PngCompressData: Compressing image with width [%d] height [%d].\n",
+              w, h );
+  #endif
+
+  /*
+   * Initialize the PNG stuff.
+   */
+
+  png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
+
+  if (png_ptr == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******PngCompressData: PANIC! Failed creating the png_create_write_struct.\n");
+    #endif
+
+    return NULL;
+  }
+
+  info_ptr = png_create_info_struct(png_ptr);
+
+  if (info_ptr == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******PngCompressData: PANIC! Failed creating the png_create_info_struct.\n");
+    #endif
+
+    png_destroy_write_struct(&png_ptr, NULL);
+
+    return NULL;
+  }
+
+  if (setjmp(png_jmpbuf(png_ptr)))
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******PngCompressData: PANIC! Error during compression initialization.\n");
+    #endif
+
+    png_destroy_write_struct(&png_ptr, &info_ptr);
+
+    return NULL;
+  }
+
+  /*
+   * Be sure we allocate enough data.
+   */
+
+  #ifdef TEST
+  fprintf(stderr, "******PngCompressData: Allocating [%d] bytes for the destination data.\n",
+              PNG_DEST_SIZE(w, h));
+  #endif
+
+  pngCompBuf = malloc(PNG_DEST_SIZE(w, h));
+
+  if (pngCompBuf == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******PngCompressData: PANIC! Error allocating [%d] bytes for the Png data.\n",
+                PNG_DEST_SIZE(w, h));
+    #endif
+
+    return NULL;
+  }
+
+  png_set_write_fn(png_ptr, (void *) pngCompBuf, PngWriteData, PngFlushData);
+
+  if (setjmp(png_jmpbuf(png_ptr)))
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******PngCompressData: PANIC! Error writing the header.\n");
+    #endif
+
+    png_destroy_write_struct(&png_ptr, &info_ptr);
+
+    free(pngCompBuf);
+
+    return NULL;
+  }
+
+  png_set_compression_level(png_ptr, PNG_Z_LEVEL);
+
+  if (bitsPerPixel == 16)
+  {
+    nb_colors = NXCreatePalette16(image, color_table, image_index, NB_COLOR_MAX);
+  }
+  else
+  {
+    nb_colors = NXCreatePalette32(image, color_table, image_index, NB_COLOR_MAX);
+  }
+
+  if (nb_colors <= NB_COLOR_MAX)
+  {
+    color_type = PNG_COLOR_TYPE_PALETTE;
+  }
+  else
+  {
+    color_type = PNG_COLOR_TYPE_RGB;
+  }
+
+  png_set_IHDR(png_ptr, info_ptr, w, h,
+                   8, color_type, PNG_INTERLACE_NONE,
+                       PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
+
+  if (color_type == PNG_COLOR_TYPE_PALETTE)
+  {
+    palette = png_malloc(png_ptr, sizeof(*palette) * 256);
+
+    /*
+     * TODO: Do we need to clean these bytes?
+     *
+     * memset(palette, 0, sizeof(*palette) * 256);
+     */
+
+    for (num = 0; num < 256 && color_table[num].found != 0; num++)
+    {
+      if (bitsPerPixel == 24)
+      {
+        palette[num].red = (color_table[num].pixel >> redShift) & redMax;
+        palette[num].green = (color_table[num].pixel >> greenShift) & greenMax;
+        palette[num].blue = color_table[num].pixel >> blueShift & blueMax;
+      }
+      else
+      {
+        int inRed, inGreen, inBlue;
+
+        inRed = (color_table[num].pixel >> redShift) & redMax;
+        inGreen = (color_table[num].pixel >> greenShift) & greenMax;
+        inBlue = color_table[num].pixel >> blueShift & blueMax;
+
+        palette[num].red = (CARD8)((inRed * 255 + redMax / 2) / redMax);
+        palette[num].green = (CARD8)((inGreen * 255 + greenMax / 2) / greenMax);
+        palette[num].blue = (CARD8)((inBlue * 255 + blueMax / 2) / blueMax);
+      }
+
+      #ifdef DEBUG
+      fprintf(stderr, "******PngCompressData: pixel[%d] r[%d] g[%d] b[%d].\n",
+                  (int) color_table[num].pixel,palette[num].red,palette[num].green,palette[num].blue);
+      #endif
+    }
+
+    png_set_PLTE(png_ptr, info_ptr, palette, num);
+
+    #ifdef DEBUG
+    fprintf(stderr, "******PngCompressedData: Setting palette.\n");
+    #endif
+  }
+
+  /*
+   * End of palette.
+   */
+
+  png_write_info(png_ptr, info_ptr);
+
+  /*
+   * Allocate space for one line of
+   * the image, 3 bytes per pixel.
+   */
+
+  #ifdef DEBUG
+  fprintf(stderr, "******PngCompressedData: Initialization finished.\n");
+  #endif
+
+  if (setjmp(png_jmpbuf(png_ptr)))
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******PngCompressData: PANIC! Error while writing the image rows.\n");
+    #endif
+
+    png_destroy_write_struct(&png_ptr, &info_ptr);
+
+    free(pngCompBuf);
+
+    return NULL;
+  }
+
+  if (color_type == PNG_COLOR_TYPE_PALETTE)
+  {
+    srcBuf = (CARD8 *) malloc(w * sizeof(CARD8));
+
+    if (srcBuf == NULL)
+    {
+      #ifdef PANIC
+      fprintf(stderr, "******PngCompressData: PANIC! Cannot allocate [%d] bytes.\n",
+                  (int) (w * sizeof(CARD8)));
+      #endif
+
+      return NULL;
+    }
+
+    /*
+     * TODO: Be sure the padded bytes are cleaned.
+     * It would be better to set to zero the bytes
+     * that are not alligned to the word boundary
+     * at the end of the procedure.
+     */
+
+    memset(srcBuf, 0, w * sizeof(CARD8));
+  }
+  else
+  {
+    srcBuf = (CARD8 *) malloc(w * 3 * sizeof(CARD8));
+
+    /*
+     * TODO: See above.
+     */
+
+    memset(srcBuf, 0, w * 3 * sizeof(CARD8));
+  }
+
+  if (srcBuf == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******PngCompressData: PANIC! Cannot allocate [%d] bytes.\n",
+                w * 3);
+    #endif
+
+    free(pngCompBuf);
+
+    return NULL;
+  }
+
+  for (dy = 0; dy < h; dy++)
+  {
+    if (color_type == PNG_COLOR_TYPE_RGB)
+    {
+      PrepareRowForPng(srcBuf, dy, w);
+    }
+    else
+    {
+      memcpy(srcBuf, image_index + (dy * w), w);
+    }
+
+    png_write_row(png_ptr, srcBuf);
+  }
+
+  #ifdef DEBUG
+  fprintf(stderr, "******PngCompressedData: Compression finished. Lines handled [%d,%d].\n",
+              dy, h);
+  #endif
+
+  free(srcBuf);
+  free(image_index);
+
+  if (setjmp(png_jmpbuf(png_ptr)))
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******PngCompressData: PANIC! error during end of write.\n");
+    #endif
+
+    png_destroy_write_struct(&png_ptr, &info_ptr);
+
+    free(pngCompBuf);
+
+    return NULL;
+  }
+
+  png_write_end(png_ptr, NULL);
+  png_destroy_write_struct(&png_ptr, &info_ptr);
+
+  if (color_type == PNG_COLOR_TYPE_PALETTE)
+  {
+    png_free(png_ptr, palette);
+  }
+
+  /*
+   * Check the size of the resulting data.
+   */
+
+  if (pngDataLen > 0)
+  {
+    #ifdef DEBUG
+
+    int i = 0;
+
+    fprintf(stderr, "******PngCompressedData: Compressed size [%d].\n",
+                pngDataLen);
+
+    pngId++;
+    sprintf(pngName, "png%d", pngId);
+    pngFile = fopen(pngName, "w");
+
+    for (i = 0; i < pngDataLen; i++)
+    {
+      fprintf(pngFile, "%c", *(pngCompBuf + i));
+    }
+
+    fclose(pngFile);
+
+    #endif
+
+    *compressed_size = pngDataLen;
+
+    return pngCompBuf;
+  }
+  else
+  {
+    #ifdef DEBUG
+    fprintf(stderr, "******PngCompressedData: PANIC! Invalid size of the compressed data [%d].\n",
+                pngDataLen);
+    #endif
+
+    free(pngCompBuf);
+
+    return NULL;
+  }
+}
+
+static void PngWriteData(png_structp png_ptr, png_bytep data, png_size_t length)
+{
+  memcpy(((char *) png_get_io_ptr(png_ptr) + pngDataLen), data, length);
+
+  pngDataLen += length;
+}
+
+static void PngFlushData(png_structp png_ptr)
+{
+}
+
+void PrepareRowForPng(CARD8 *dst, int y, int count)
+{
+  if (bitsPerPixel == 32)
+  {
+    if (redMax == 0xff &&
+           greenMax == 0xff &&
+               blueMax == 0xff)
+    {
+      PrepareRowForPng24(dst, y, count);
+    }
+    else
+    {
+      PrepareRowForPng32(dst, y, count);
+    }
+  }
+  else if (bitsPerPixel == 24)
+  {
+    memcpy(dst, pngBeforeBuf + y * bytesPerLine, count * 3);
+  }
+  else
+  {
+    /*
+     * 16 bpp assumed.
+     */
+
+    PrepareRowForPng16(dst, y, count);
+  }
+}
+
+
+
+void PrepareRowForPng24(CARD8 *dst, int y, int count)
+{
+  CARD8 *fbptr;
+  CARD32 pix;
+
+  fbptr = (CARD8 *) (pngBeforeBuf + y * bytesPerLine);
+
+  while (count--)
+  {
+    if (byteOrder == LSBFirst)
+    {
+      pix = (CARD32) *(fbptr + 2);
+      pix = (pix << 8) | (CARD32) *(fbptr+1);
+      pix = (pix << 8) | (CARD32) *fbptr;
+    }
+    else
+    {
+      pix = (CARD32) *(fbptr + 1);
+      pix = (pix << 8) | (CARD32) *(fbptr + 2);
+      pix = (pix << 8) | (CARD32) *(fbptr + 3);
+    }
+
+    *dst++ = (CARD8)(pix >> redShift);
+    *dst++ = (CARD8)(pix >> greenShift);
+    *dst++ = (CARD8)(pix >> blueShift);
+
+    fbptr+=4;
+  }
+}
+
+#define DEFINE_PNG_GET_ROW_FUNCTION(bpp)                                    \
+                                                                            \
+void PrepareRowForPng##bpp(CARD8 *dst, int y, int count)                    \
+{                                                                           \
+  CARD8 *fbptr;                                                             \
+  CARD##bpp pix;                                                            \
+  int inRed, inGreen, inBlue;                                               \
+  int i;                                                                    \
+                                                                            \
+  fbptr = (CARD8 *) (pngBeforeBuf + y * bytesPerLine);                      \
+                                                                            \
+  while (count--)                                                           \
+  {                                                                         \
+    pix = 0;                                                                \
+                                                                            \
+    if (byteOrder == LSBFirst)                                              \
+    {                                                                       \
+      for (i = (bpp >> 3) - 1; i >= 0; i--)                                 \
+      {                                                                     \
+        pix = (pix << 8) | (CARD32) *(fbptr + i);                           \
+      }                                                                     \
+    }                                                                       \
+    else                                                                    \
+    {                                                                       \
+      for (i = 0; i < (bpp >> 3); i++)                                      \
+      {                                                                     \
+        pix = (pix << 8) | (CARD32) *(fbptr + i);                           \
+      }                                                                     \
+    }                                                                       \
+                                                                            \
+    fbptr += (bpp >> 3);                                                    \
+                                                                            \
+    inRed = (int)                                                           \
+            (pix >> redShift   & redMax);                                   \
+    inGreen = (int)                                                         \
+            (pix >> greenShift & greenMax);                                 \
+    inBlue  = (int)                                                         \
+            (pix >> blueShift  & blueMax);                                  \
+    *dst++ = (CARD8)((inRed   * 255 + redMax / 2) /                         \
+                         redMax);                                           \
+    *dst++ = (CARD8)((inGreen * 255 + greenMax / 2) /                       \
+                         greenMax);                                         \
+    *dst++ = (CARD8)((inBlue  * 255 + blueMax / 2) /                        \
+                         blueMax);                                          \
+  }                                                                         \
+}
+
+DEFINE_PNG_GET_ROW_FUNCTION(16)
+DEFINE_PNG_GET_ROW_FUNCTION(32)
diff --git a/nxcompext/Pgn.h b/nxcompext/Pgn.h
new file mode 100644
index 000000000..999e8ea01
--- /dev/null
+++ b/nxcompext/Pgn.h
@@ -0,0 +1,68 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Pgn_H
+#define Pgn_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "X11/X.h"
+#include "X11/Xlib.h"
+#include "X11/Xmd.h"
+
+#include <png.h> 
+
+extern int PngCompareColorTable(
+#if NeedFunctionPrototypes
+  NXColorTable*     /* color_table_1 */,
+  NXColorTable*     /* color_table_2 */
+#endif
+);
+
+extern char *PngCompressData(
+#if NeedFunctionPrototypes
+    XImage*          /* image */,
+    int*             /* compressed_size */
+#endif
+);
+
+int NXCreatePalette16(
+#if NeedFunctionPrototypes
+    XImage*          /* src_image */,
+    NXColorTable*    /* color_table */,
+    CARD8*           /* image_index */,
+    int              /* nb_max */
+#endif
+);
+
+int NXCreatePalette32(
+#if NeedFunctionPrototypes
+    XImage*          /* src_image */,
+    NXColorTable*    /* color_table */,
+    CARD8*           /* image_index */,
+    int              /* nb_max */
+#endif
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* Pgn_H */
+
diff --git a/nxcompext/README b/nxcompext/README
new file mode 100644
index 000000000..39648e76b
--- /dev/null
+++ b/nxcompext/README
@@ -0,0 +1,15 @@
+README
+------
+
+1. To compile:
+
+   > tar zxvf nxcompext-X.Y.Z-N.tar.gz
+   > cd nxcompext
+   > ./configure
+   > make
+
+   You'll have to run gmake under Solaris.
+
+2. The 'make install' target is not currently supported
+   in the Makefile, but it should be simple to fix.
+
diff --git a/nxcompext/Rgb.c b/nxcompext/Rgb.c
new file mode 100644
index 000000000..d6cecb4b6
--- /dev/null
+++ b/nxcompext/Rgb.c
@@ -0,0 +1,43 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#include <zlib.h>
+
+#include "NXlib.h"
+
+#include "Rgb.h"
+#include "Z.h"
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+#define RGB_COMPRESSION_LEVEL      4
+#define RGB_COMPRESSION_THRESHOLD  32
+#define RGB_COMPRESSION_STRATEGY   Z_DEFAULT_STRATEGY
+
+static int rgbCompressionLevel     = RGB_COMPRESSION_LEVEL;
+static int rgbCompressionThreshold = RGB_COMPRESSION_THRESHOLD;
+static int rgbCompressionStrategy  = RGB_COMPRESSION_STRATEGY;
+
+char *RgbCompressData(XImage *image, unsigned int *size)
+{
+  return ZCompressData(image -> data, image -> bytes_per_line * image -> height,
+                           rgbCompressionThreshold, rgbCompressionLevel,
+                               rgbCompressionStrategy, size);
+}
diff --git a/nxcompext/Rgb.h b/nxcompext/Rgb.h
new file mode 100644
index 000000000..931ee6af7
--- /dev/null
+++ b/nxcompext/Rgb.h
@@ -0,0 +1,36 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Rgb_H
+#define Rgb_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern char *RgbCompressData(
+#if NeedFunctionPrototypes
+    XImage*                   /* image */,
+    unsigned int*             /* compressed_size */
+#endif
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* Rgb_H */
diff --git a/nxcompext/Rle.c b/nxcompext/Rle.c
new file mode 100644
index 000000000..b647dbbae
--- /dev/null
+++ b/nxcompext/Rle.c
@@ -0,0 +1,43 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#include <zlib.h>
+
+#include "NXlib.h"
+
+#include "Rle.h"
+#include "Z.h"
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+#define RLE_COMPRESSION_LEVEL      1
+#define RLE_COMPRESSION_THRESHOLD  32
+#define RLE_COMPRESSION_STRATEGY   Z_RLE
+
+static int rleCompressionLevel     = RLE_COMPRESSION_LEVEL;
+static int rleCompressionThreshold = RLE_COMPRESSION_THRESHOLD;
+static int rleCompressionStrategy  = RLE_COMPRESSION_STRATEGY;
+
+char *RleCompressData(XImage *image, unsigned int *size)
+{
+  return ZCompressData(image -> data, image -> bytes_per_line * image -> height,
+                           rleCompressionThreshold, rleCompressionLevel,
+                               rleCompressionStrategy, size);
+}
diff --git a/nxcompext/Rle.h b/nxcompext/Rle.h
new file mode 100644
index 000000000..7125d2f24
--- /dev/null
+++ b/nxcompext/Rle.h
@@ -0,0 +1,36 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Rle_H
+#define Rle_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern char *RleCompressData(
+#if NeedFunctionPrototypes
+    XImage*                   /* image */,
+    unsigned int*             /* compressed_size */
+#endif
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* Rle_H */
diff --git a/nxcompext/VERSION b/nxcompext/VERSION
new file mode 100644
index 000000000..fd2a01863
--- /dev/null
+++ b/nxcompext/VERSION
@@ -0,0 +1 @@
+3.1.0
diff --git a/nxcompext/Z.c b/nxcompext/Z.c
new file mode 100644
index 000000000..d6ed3d149
--- /dev/null
+++ b/nxcompext/Z.c
@@ -0,0 +1,301 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <zlib.h>
+
+#include "NXlib.h"
+
+#include "Z.h"
+
+#define PANIC
+#define WARNING
+#undef  TEST
+#undef  DEBUG
+
+#define Z_COMPRESSION_LEVEL      4
+#define Z_COMPRESSION_THRESHOLD  32
+#define Z_COMPRESSION_STRATEGY   Z_DEFAULT_STRATEGY
+
+static int zCompressionLevel    = Z_COMPRESSION_LEVEL;
+static int zCompressionStrategy = Z_COMPRESSION_STRATEGY;
+
+static z_stream *zStream;
+
+static int zInitialized;
+
+static int ZConfigure(int level, int strategy);
+
+static int ZDeflate(char *dest, unsigned int *destLen,
+                        const char *source, unsigned int sourceLen);
+
+char *ZCompressData(const char *plainData, unsigned int plainSize, int threshold,
+                        int level, int strategy, unsigned int *compressedSize)
+{
+  char *compressedData;
+
+  /*
+   * Determine the size of the source image
+   * data and make sure there is enough
+   * space in the destination buffer.
+   */
+
+  *compressedSize = plainSize + (plainSize / 1000) + 12 + 1;
+
+  compressedData = Xmalloc(*compressedSize);
+
+  if (compressedData == NULL)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******ZCompressData: PANIC! Failed to allocate [%d] bytes for the destination.\n",
+                *compressedSize);
+    #endif
+
+    *compressedSize = 0;
+
+    return NULL;
+  }
+
+  if (level == Z_NO_COMPRESSION || plainSize < threshold)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******ZCompressData: Not compressing [%d] bytes with level [%d] and "
+	    "threshold [%d].\n", plainSize, level, threshold);
+    #endif
+
+    /*
+     * Tell in the first byte of the buffer
+     * if the remaining data is compressed
+     * or not. This same byte can be used
+     * in future to store some other flag.
+     */
+
+    *compressedData = 0;
+
+    memcpy(compressedData + 1, plainData, plainSize);
+
+    *compressedSize = plainSize + 1;
+
+    return compressedData;
+  }
+  else
+  {
+    int result;
+
+    /*
+     * Reconfigure the stream if needed.
+     */
+
+    if (zCompressionLevel != level ||
+            zCompressionStrategy != strategy)
+    {
+      ZConfigure(level, strategy);
+
+      zCompressionLevel    = level;
+      zCompressionStrategy = strategy;
+    }
+
+    result = ZDeflate(compressedData + 1, compressedSize, plainData, plainSize);
+
+    if (result != Z_OK)
+    {
+      #ifdef PANIC
+      fprintf(stderr, "******ZCompressData: PANIC! Failed to compress [%d] bytes with error [%s].\n",
+                  plainSize, zError(result));
+      #endif
+
+      Xfree(compressedData);
+
+      *compressedSize = 0;
+
+      return NULL;
+    }
+
+    #ifdef TEST
+    fprintf(stderr, "******ZCompressData: Source data of [%d] bytes compressed to [%d].\n",
+                plainSize, *compressedSize);
+    #endif
+
+    *compressedData = 1;
+
+    *compressedSize = *compressedSize + 1;
+
+    return compressedData;
+  }
+}
+
+int ZConfigure(int level, int strategy)
+{
+  /*
+   * ZLIB wants the avail_out to be
+   * non zero, even if the stream was
+   * already flushed.
+   */
+
+  unsigned char dest[1];
+
+  zStream -> next_out  = dest;
+  zStream -> avail_out = 1;
+
+  if (deflateParams(zStream, level, strategy) != Z_OK)
+  {
+    #ifdef PANIC
+    fprintf(stderr, "******ZConfigure: PANIC! Failed to set level to [%d] and strategy to [%d].\n",
+                level, strategy);
+    #endif
+
+    return -1;
+  }
+  #ifdef TEST
+  else
+  {
+    fprintf(stderr, "******ZConfigure: Reconfigured the stream with level [%d] and strategy [%d].\n",
+                level, strategy);
+  }
+  #endif
+
+  return 1;
+}
+
+int ZDeflate(char *dest, unsigned int *destLen, const char *source, unsigned int sourceLen)
+{
+  int saveOut;
+  int result;
+
+  /*
+   * Deal with the possible overflow.
+   */
+
+  if (zStream -> total_out & 0x80000000)
+  {
+    #ifdef TEST
+    fprintf(stderr, "******ZDeflate: Reset Z stream counters with total in [%ld] total out [%ld].\n",
+                zStream -> total_in, zStream -> total_out);
+    #endif
+
+    zStream -> total_in  = 0;
+    zStream -> total_out = 0;
+  }
+
+  saveOut = zStream -> total_out;
+
+  zStream -> next_in  = (Bytef *) source;
+  zStream -> avail_in = (uInt) sourceLen;
+
+  #ifdef MAXSEG_64K
+
+  /*
+   * Check if the source is greater
+   * than 64K on a 16-bit machine.
+   */
+
+  if ((uLong) zStream -> avail_in != sourceLen) return Z_BUF_ERROR;
+
+  #endif
+
+  zStream -> next_out  = (unsigned char *) dest;
+  zStream -> avail_out = (uInt) *destLen;
+
+  if ((uLong) zStream -> avail_out != *destLen) return Z_BUF_ERROR;
+
+  result = deflate(zStream, Z_FINISH);
+
+  if (result != Z_STREAM_END)
+  {
+    deflateReset(zStream);
+
+    return (result == Z_OK ? Z_BUF_ERROR : result);
+  }
+
+  *destLen = zStream -> total_out - saveOut;
+
+  result = deflateReset(zStream);
+
+  return result;
+}
+
+int ZInitEncoder()
+{
+  if (zInitialized == 0)
+  {
+    int result;
+
+    zStream = Xmalloc(sizeof(z_stream));
+
+    if (zStream == NULL)
+    {
+      #ifdef PANIC
+      fprintf(stderr, "******ZInitEncoder: PANIC! Failed to allocate memory for the stream.\n");
+      #endif
+
+      return -1;
+    }
+
+    zStream -> zalloc = (alloc_func) 0;
+    zStream -> zfree  = (free_func) 0;
+    zStream -> opaque = (voidpf) 0;
+
+    #ifdef TEST
+    fprintf(stderr, "******ZInitEncoder: Initializing compressor with level [%d] and startegy [%d].\n",
+                zCompressionLevel, zCompressionStrategy);
+    #endif
+
+    result = deflateInit2(zStream, zCompressionLevel, Z_DEFLATED,
+                              15, 9, zCompressionStrategy);
+
+    if (result != Z_OK)
+    {
+      #ifdef PANIC
+      fprintf(stderr, "******ZInitEncoder: Failed to initialize the compressor with error [%s].\n",
+                  zError(result));
+      #endif
+
+      return -1;
+    }
+
+    zInitialized = 1;
+  }
+
+  return zInitialized;
+}
+
+int ZResetEncoder()
+{
+  int result;
+
+  if (zInitialized == 1)
+  {
+    result = deflateEnd(zStream);
+
+    if (result != Z_OK)
+    {
+      #ifdef WARNING
+      fprintf(stderr, "******ZResetEncoder: WARNING! Failed to deinitialize the compressor with error [%s].\n",
+                  zError(result));
+      #endif
+    }
+
+    Xfree(zStream);
+  }
+
+  zInitialized = 0;
+
+  return 1;
+}
diff --git a/nxcompext/Z.h b/nxcompext/Z.h
new file mode 100644
index 000000000..b6733c607
--- /dev/null
+++ b/nxcompext/Z.h
@@ -0,0 +1,52 @@
+/**************************************************************************/
+/*                                                                        */
+/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
+/*                                                                        */
+/* NXCOMPEXT, NX protocol compression and NX extensions to this software  */
+/* are copyright of NoMachine. Redistribution and use of the present      */
+/* software is allowed according to terms specified in the file LICENSE   */
+/* which comes in the source distribution.                                */
+/*                                                                        */
+/* Check http://www.nomachine.com/licensing.html for applicability.       */
+/*                                                                        */
+/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
+/*                                                                        */
+/* All rigths reserved.                                                   */
+/*                                                                        */
+/**************************************************************************/
+
+#ifndef Z_H
+#define Z_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int ZInitEncoder(
+#if NeedFunctionPrototypes
+void
+#endif
+);
+
+int ZResetEncoder(
+#if NeedFunctionPrototypes
+void
+#endif
+);
+
+extern char *ZCompressData(
+#if NeedFunctionPrototypes
+    const char*     /* data */,
+    unsigned int    /* size */,
+    int             /* threshold */,
+    int             /* level */,
+    int             /* strategy */,
+    unsigned int*   /* compressed_size */
+#endif
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* Z_H */
diff --git a/nxcompext/configure b/nxcompext/configure
new file mode 100755
index 000000000..87d630ec2
--- /dev/null
+++ b/nxcompext/configure
@@ -0,0 +1,5618 @@
+#! /bin/sh
+# Guess values for system-dependent variables and create Makefiles.
+# Generated by GNU Autoconf 2.59.
+#
+# Copyright (C) 2003 Free Software Foundation, Inc.
+# This configure script is free software; the Free Software Foundation
+# gives unlimited permission to copy, distribute and modify it.
+## --------------------- ##
+## M4sh Initialization.  ##
+## --------------------- ##
+
+# Be Bourne compatible
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+elif test -n "${BASH_VERSION+set}" && (set -o posix) >/dev/null 2>&1; then
+  set -o posix
+fi
+DUALCASE=1; export DUALCASE # for MKS sh
+
+# Support unset when possible.
+if ( (MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then
+  as_unset=unset
+else
+  as_unset=false
+fi
+
+
+# Work around bugs in pre-3.0 UWIN ksh.
+$as_unset ENV MAIL MAILPATH
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# NLS nuisances.
+for as_var in \
+  LANG LANGUAGE LC_ADDRESS LC_ALL LC_COLLATE LC_CTYPE LC_IDENTIFICATION \
+  LC_MEASUREMENT LC_MESSAGES LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER \
+  LC_TELEPHONE LC_TIME
+do
+  if (set +x; test -z "`(eval $as_var=C; export $as_var) 2>&1`"); then
+    eval $as_var=C; export $as_var
+  else
+    $as_unset $as_var
+  fi
+done
+
+# Required to use basename.
+if expr a : '\(a\)' >/dev/null 2>&1; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+if (basename /) >/dev/null 2>&1 && test "X`basename / 2>&1`" = "X/"; then
+  as_basename=basename
+else
+  as_basename=false
+fi
+
+
+# Name of the executable.
+as_me=`$as_basename "$0" ||
+$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$0" : 'X\(//\)$' \| \
+	 X"$0" : 'X\(/\)$' \| \
+	 .     : '\(.\)' 2>/dev/null ||
+echo X/"$0" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{ s//\1/; q; }
+  	  /^X\/\(\/\/\)$/{ s//\1/; q; }
+  	  /^X\/\(\/\).*/{ s//\1/; q; }
+  	  s/.*/./; q'`
+
+
+# PATH needs CR, and LINENO needs CR and PATH.
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
+
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  echo "#! /bin/sh" >conf$$.sh
+  echo  "exit 0"   >>conf$$.sh
+  chmod +x conf$$.sh
+  if (PATH="/nonexistent;."; conf$$.sh) >/dev/null 2>&1; then
+    PATH_SEPARATOR=';'
+  else
+    PATH_SEPARATOR=:
+  fi
+  rm -f conf$$.sh
+fi
+
+
+  as_lineno_1=$LINENO
+  as_lineno_2=$LINENO
+  as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null`
+  test "x$as_lineno_1" != "x$as_lineno_2" &&
+  test "x$as_lineno_3"  = "x$as_lineno_2"  || {
+  # Find who we are.  Look in the path if we contain no path at all
+  # relative or not.
+  case $0 in
+    *[\\/]* ) as_myself=$0 ;;
+    *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
+done
+
+       ;;
+  esac
+  # We did not find ourselves, most probably we were run as `sh COMMAND'
+  # in which case we are not to be found in the path.
+  if test "x$as_myself" = x; then
+    as_myself=$0
+  fi
+  if test ! -f "$as_myself"; then
+    { echo "$as_me: error: cannot find myself; rerun with an absolute path" >&2
+   { (exit 1); exit 1; }; }
+  fi
+  case $CONFIG_SHELL in
+  '')
+    as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for as_base in sh bash ksh sh5; do
+	 case $as_dir in
+	 /*)
+	   if ("$as_dir/$as_base" -c '
+  as_lineno_1=$LINENO
+  as_lineno_2=$LINENO
+  as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null`
+  test "x$as_lineno_1" != "x$as_lineno_2" &&
+  test "x$as_lineno_3"  = "x$as_lineno_2" ') 2>/dev/null; then
+	     $as_unset BASH_ENV || test "${BASH_ENV+set}" != set || { BASH_ENV=; export BASH_ENV; }
+	     $as_unset ENV || test "${ENV+set}" != set || { ENV=; export ENV; }
+	     CONFIG_SHELL=$as_dir/$as_base
+	     export CONFIG_SHELL
+	     exec "$CONFIG_SHELL" "$0" ${1+"$@"}
+	   fi;;
+	 esac
+       done
+done
+;;
+  esac
+
+  # Create $as_me.lineno as a copy of $as_myself, but with $LINENO
+  # uniformly replaced by the line number.  The first 'sed' inserts a
+  # line-number line before each line; the second 'sed' does the real
+  # work.  The second script uses 'N' to pair each line-number line
+  # with the numbered line, and appends trailing '-' during
+  # substitution so that $LINENO is not a special case at line end.
+  # (Raja R Harinath suggested sed '=', and Paul Eggert wrote the
+  # second 'sed' script.  Blame Lee E. McMahon for sed's syntax.  :-)
+  sed '=' <$as_myself |
+    sed '
+      N
+      s,$,-,
+      : loop
+      s,^\(['$as_cr_digits']*\)\(.*\)[$]LINENO\([^'$as_cr_alnum'_]\),\1\2\1\3,
+      t loop
+      s,-$,,
+      s,^['$as_cr_digits']*\n,,
+    ' >$as_me.lineno &&
+  chmod +x $as_me.lineno ||
+    { echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2
+   { (exit 1); exit 1; }; }
+
+  # Don't try to exec as it changes $[0], causing all sort of problems
+  # (the dirname of $[0] is not the place where we might find the
+  # original and so on.  Autoconf is especially sensible to this).
+  . ./$as_me.lineno
+  # Exit status is that of the last command.
+  exit
+}
+
+
+case `echo "testing\c"; echo 1,2,3`,`echo -n testing; echo 1,2,3` in
+  *c*,-n*) ECHO_N= ECHO_C='
+' ECHO_T='	' ;;
+  *c*,*  ) ECHO_N=-n ECHO_C= ECHO_T= ;;
+  *)       ECHO_N= ECHO_C='\c' ECHO_T= ;;
+esac
+
+if expr a : '\(a\)' >/dev/null 2>&1; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+rm -f conf$$ conf$$.exe conf$$.file
+echo >conf$$.file
+if ln -s conf$$.file conf$$ 2>/dev/null; then
+  # We could just check for DJGPP; but this test a) works b) is more generic
+  # and c) will remain valid once DJGPP supports symlinks (DJGPP 2.04).
+  if test -f conf$$.exe; then
+    # Don't use ln at all; we don't have any links
+    as_ln_s='cp -p'
+  else
+    as_ln_s='ln -s'
+  fi
+elif ln conf$$.file conf$$ 2>/dev/null; then
+  as_ln_s=ln
+else
+  as_ln_s='cp -p'
+fi
+rm -f conf$$ conf$$.exe conf$$.file
+
+if mkdir -p . 2>/dev/null; then
+  as_mkdir_p=:
+else
+  test -d ./-p && rmdir ./-p
+  as_mkdir_p=false
+fi
+
+as_executable_p="test -f"
+
+# Sed expression to map a string onto a valid CPP name.
+as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+
+# Sed expression to map a string onto a valid variable name.
+as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+
+
+# IFS
+# We need space, tab and new line, in precisely that order.
+as_nl='
+'
+IFS=" 	$as_nl"
+
+# CDPATH.
+$as_unset CDPATH
+
+
+# Name of the host.
+# hostname on some systems (SVR3.2, Linux) returns a bogus exit status,
+# so uname gets run too.
+ac_hostname=`(hostname || uname -n) 2>/dev/null | sed 1q`
+
+exec 6>&1
+
+#
+# Initializations.
+#
+ac_default_prefix=/usr/local
+ac_config_libobj_dir=.
+cross_compiling=no
+subdirs=
+MFLAGS=
+MAKEFLAGS=
+SHELL=${CONFIG_SHELL-/bin/sh}
+
+# Maximum number of lines to put in a shell here document.
+# This variable seems obsolete.  It should probably be removed, and
+# only ac_max_sed_lines should be used.
+: ${ac_max_here_lines=38}
+
+# Identity of this package.
+PACKAGE_NAME=
+PACKAGE_TARNAME=
+PACKAGE_VERSION=
+PACKAGE_STRING=
+PACKAGE_BUGREPORT=
+
+ac_unique_file="NXlib.h"
+ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS CXX CXXFLAGS LDFLAGS CPPFLAGS ac_ct_CXX EXEEXT OBJEXT CC CFLAGS ac_ct_CC INSTALL_PROGRAM INSTALL_SCRIPT INSTALL_DATA CXXCPP X_CFLAGS X_PRE_LIBS X_LIBS X_EXTRA_LIBS LIBVERSION VERSION MAKEDEPEND ALL LIBOBJS LTLIBOBJS'
+ac_subst_files=''
+
+# Initialize some variables set by options.
+ac_init_help=
+ac_init_version=false
+# The variables have the same names as the options, with
+# dashes changed to underlines.
+cache_file=/dev/null
+exec_prefix=NONE
+no_create=
+no_recursion=
+prefix=NONE
+program_prefix=NONE
+program_suffix=NONE
+program_transform_name=s,x,x,
+silent=
+site=
+srcdir=
+verbose=
+x_includes=NONE
+x_libraries=NONE
+
+# Installation directory options.
+# These are left unexpanded so users can "make install exec_prefix=/foo"
+# and all the variables that are supposed to be based on exec_prefix
+# by default will actually change.
+# Use braces instead of parens because sh, perl, etc. also accept them.
+bindir='${exec_prefix}/bin'
+sbindir='${exec_prefix}/sbin'
+libexecdir='${exec_prefix}/libexec'
+datadir='${prefix}/share'
+sysconfdir='${prefix}/etc'
+sharedstatedir='${prefix}/com'
+localstatedir='${prefix}/var'
+libdir='${exec_prefix}/lib'
+includedir='${prefix}/include'
+oldincludedir='/usr/include'
+infodir='${prefix}/info'
+mandir='${prefix}/man'
+
+ac_prev=
+for ac_option
+do
+  # If the previous option needs an argument, assign it.
+  if test -n "$ac_prev"; then
+    eval "$ac_prev=\$ac_option"
+    ac_prev=
+    continue
+  fi
+
+  ac_optarg=`expr "x$ac_option" : 'x[^=]*=\(.*\)'`
+
+  # Accept the important Cygnus configure options, so we can diagnose typos.
+
+  case $ac_option in
+
+  -bindir | --bindir | --bindi | --bind | --bin | --bi)
+    ac_prev=bindir ;;
+  -bindir=* | --bindir=* | --bindi=* | --bind=* | --bin=* | --bi=*)
+    bindir=$ac_optarg ;;
+
+  -build | --build | --buil | --bui | --bu)
+    ac_prev=build_alias ;;
+  -build=* | --build=* | --buil=* | --bui=* | --bu=*)
+    build_alias=$ac_optarg ;;
+
+  -cache-file | --cache-file | --cache-fil | --cache-fi \
+  | --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
+    ac_prev=cache_file ;;
+  -cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
+  | --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* | --c=*)
+    cache_file=$ac_optarg ;;
+
+  --config-cache | -C)
+    cache_file=config.cache ;;
+
+  -datadir | --datadir | --datadi | --datad | --data | --dat | --da)
+    ac_prev=datadir ;;
+  -datadir=* | --datadir=* | --datadi=* | --datad=* | --data=* | --dat=* \
+  | --da=*)
+    datadir=$ac_optarg ;;
+
+  -disable-* | --disable-*)
+    ac_feature=`expr "x$ac_option" : 'x-*disable-\(.*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_feature" : ".*[^-_$as_cr_alnum]" >/dev/null &&
+      { echo "$as_me: error: invalid feature name: $ac_feature" >&2
+   { (exit 1); exit 1; }; }
+    ac_feature=`echo $ac_feature | sed 's/-/_/g'`
+    eval "enable_$ac_feature=no" ;;
+
+  -enable-* | --enable-*)
+    ac_feature=`expr "x$ac_option" : 'x-*enable-\([^=]*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_feature" : ".*[^-_$as_cr_alnum]" >/dev/null &&
+      { echo "$as_me: error: invalid feature name: $ac_feature" >&2
+   { (exit 1); exit 1; }; }
+    ac_feature=`echo $ac_feature | sed 's/-/_/g'`
+    case $ac_option in
+      *=*) ac_optarg=`echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"`;;
+      *) ac_optarg=yes ;;
+    esac
+    eval "enable_$ac_feature='$ac_optarg'" ;;
+
+  -exec-prefix | --exec_prefix | --exec-prefix | --exec-prefi \
+  | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec- \
+  | --exec | --exe | --ex)
+    ac_prev=exec_prefix ;;
+  -exec-prefix=* | --exec_prefix=* | --exec-prefix=* | --exec-prefi=* \
+  | --exec-pref=* | --exec-pre=* | --exec-pr=* | --exec-p=* | --exec-=* \
+  | --exec=* | --exe=* | --ex=*)
+    exec_prefix=$ac_optarg ;;
+
+  -gas | --gas | --ga | --g)
+    # Obsolete; use --with-gas.
+    with_gas=yes ;;
+
+  -help | --help | --hel | --he | -h)
+    ac_init_help=long ;;
+  -help=r* | --help=r* | --hel=r* | --he=r* | -hr*)
+    ac_init_help=recursive ;;
+  -help=s* | --help=s* | --hel=s* | --he=s* | -hs*)
+    ac_init_help=short ;;
+
+  -host | --host | --hos | --ho)
+    ac_prev=host_alias ;;
+  -host=* | --host=* | --hos=* | --ho=*)
+    host_alias=$ac_optarg ;;
+
+  -includedir | --includedir | --includedi | --included | --include \
+  | --includ | --inclu | --incl | --inc)
+    ac_prev=includedir ;;
+  -includedir=* | --includedir=* | --includedi=* | --included=* | --include=* \
+  | --includ=* | --inclu=* | --incl=* | --inc=*)
+    includedir=$ac_optarg ;;
+
+  -infodir | --infodir | --infodi | --infod | --info | --inf)
+    ac_prev=infodir ;;
+  -infodir=* | --infodir=* | --infodi=* | --infod=* | --info=* | --inf=*)
+    infodir=$ac_optarg ;;
+
+  -libdir | --libdir | --libdi | --libd)
+    ac_prev=libdir ;;
+  -libdir=* | --libdir=* | --libdi=* | --libd=*)
+    libdir=$ac_optarg ;;
+
+  -libexecdir | --libexecdir | --libexecdi | --libexecd | --libexec \
+  | --libexe | --libex | --libe)
+    ac_prev=libexecdir ;;
+  -libexecdir=* | --libexecdir=* | --libexecdi=* | --libexecd=* | --libexec=* \
+  | --libexe=* | --libex=* | --libe=*)
+    libexecdir=$ac_optarg ;;
+
+  -localstatedir | --localstatedir | --localstatedi | --localstated \
+  | --localstate | --localstat | --localsta | --localst \
+  | --locals | --local | --loca | --loc | --lo)
+    ac_prev=localstatedir ;;
+  -localstatedir=* | --localstatedir=* | --localstatedi=* | --localstated=* \
+  | --localstate=* | --localstat=* | --localsta=* | --localst=* \
+  | --locals=* | --local=* | --loca=* | --loc=* | --lo=*)
+    localstatedir=$ac_optarg ;;
+
+  -mandir | --mandir | --mandi | --mand | --man | --ma | --m)
+    ac_prev=mandir ;;
+  -mandir=* | --mandir=* | --mandi=* | --mand=* | --man=* | --ma=* | --m=*)
+    mandir=$ac_optarg ;;
+
+  -nfp | --nfp | --nf)
+    # Obsolete; use --without-fp.
+    with_fp=no ;;
+
+  -no-create | --no-create | --no-creat | --no-crea | --no-cre \
+  | --no-cr | --no-c | -n)
+    no_create=yes ;;
+
+  -no-recursion | --no-recursion | --no-recursio | --no-recursi \
+  | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r)
+    no_recursion=yes ;;
+
+  -oldincludedir | --oldincludedir | --oldincludedi | --oldincluded \
+  | --oldinclude | --oldinclud | --oldinclu | --oldincl | --oldinc \
+  | --oldin | --oldi | --old | --ol | --o)
+    ac_prev=oldincludedir ;;
+  -oldincludedir=* | --oldincludedir=* | --oldincludedi=* | --oldincluded=* \
+  | --oldinclude=* | --oldinclud=* | --oldinclu=* | --oldincl=* | --oldinc=* \
+  | --oldin=* | --oldi=* | --old=* | --ol=* | --o=*)
+    oldincludedir=$ac_optarg ;;
+
+  -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
+    ac_prev=prefix ;;
+  -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
+    prefix=$ac_optarg ;;
+
+  -program-prefix | --program-prefix | --program-prefi | --program-pref \
+  | --program-pre | --program-pr | --program-p)
+    ac_prev=program_prefix ;;
+  -program-prefix=* | --program-prefix=* | --program-prefi=* \
+  | --program-pref=* | --program-pre=* | --program-pr=* | --program-p=*)
+    program_prefix=$ac_optarg ;;
+
+  -program-suffix | --program-suffix | --program-suffi | --program-suff \
+  | --program-suf | --program-su | --program-s)
+    ac_prev=program_suffix ;;
+  -program-suffix=* | --program-suffix=* | --program-suffi=* \
+  | --program-suff=* | --program-suf=* | --program-su=* | --program-s=*)
+    program_suffix=$ac_optarg ;;
+
+  -program-transform-name | --program-transform-name \
+  | --program-transform-nam | --program-transform-na \
+  | --program-transform-n | --program-transform- \
+  | --program-transform | --program-transfor \
+  | --program-transfo | --program-transf \
+  | --program-trans | --program-tran \
+  | --progr-tra | --program-tr | --program-t)
+    ac_prev=program_transform_name ;;
+  -program-transform-name=* | --program-transform-name=* \
+  | --program-transform-nam=* | --program-transform-na=* \
+  | --program-transform-n=* | --program-transform-=* \
+  | --program-transform=* | --program-transfor=* \
+  | --program-transfo=* | --program-transf=* \
+  | --program-trans=* | --program-tran=* \
+  | --progr-tra=* | --program-tr=* | --program-t=*)
+    program_transform_name=$ac_optarg ;;
+
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil)
+    silent=yes ;;
+
+  -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
+    ac_prev=sbindir ;;
+  -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
+  | --sbi=* | --sb=*)
+    sbindir=$ac_optarg ;;
+
+  -sharedstatedir | --sharedstatedir | --sharedstatedi \
+  | --sharedstated | --sharedstate | --sharedstat | --sharedsta \
+  | --sharedst | --shareds | --shared | --share | --shar \
+  | --sha | --sh)
+    ac_prev=sharedstatedir ;;
+  -sharedstatedir=* | --sharedstatedir=* | --sharedstatedi=* \
+  | --sharedstated=* | --sharedstate=* | --sharedstat=* | --sharedsta=* \
+  | --sharedst=* | --shareds=* | --shared=* | --share=* | --shar=* \
+  | --sha=* | --sh=*)
+    sharedstatedir=$ac_optarg ;;
+
+  -site | --site | --sit)
+    ac_prev=site ;;
+  -site=* | --site=* | --sit=*)
+    site=$ac_optarg ;;
+
+  -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
+    ac_prev=srcdir ;;
+  -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
+    srcdir=$ac_optarg ;;
+
+  -sysconfdir | --sysconfdir | --sysconfdi | --sysconfd | --sysconf \
+  | --syscon | --sysco | --sysc | --sys | --sy)
+    ac_prev=sysconfdir ;;
+  -sysconfdir=* | --sysconfdir=* | --sysconfdi=* | --sysconfd=* | --sysconf=* \
+  | --syscon=* | --sysco=* | --sysc=* | --sys=* | --sy=*)
+    sysconfdir=$ac_optarg ;;
+
+  -target | --target | --targe | --targ | --tar | --ta | --t)
+    ac_prev=target_alias ;;
+  -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
+    target_alias=$ac_optarg ;;
+
+  -v | -verbose | --verbose | --verbos | --verbo | --verb)
+    verbose=yes ;;
+
+  -version | --version | --versio | --versi | --vers | -V)
+    ac_init_version=: ;;
+
+  -with-* | --with-*)
+    ac_package=`expr "x$ac_option" : 'x-*with-\([^=]*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_package" : ".*[^-_$as_cr_alnum]" >/dev/null &&
+      { echo "$as_me: error: invalid package name: $ac_package" >&2
+   { (exit 1); exit 1; }; }
+    ac_package=`echo $ac_package| sed 's/-/_/g'`
+    case $ac_option in
+      *=*) ac_optarg=`echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"`;;
+      *) ac_optarg=yes ;;
+    esac
+    eval "with_$ac_package='$ac_optarg'" ;;
+
+  -without-* | --without-*)
+    ac_package=`expr "x$ac_option" : 'x-*without-\(.*\)'`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_package" : ".*[^-_$as_cr_alnum]" >/dev/null &&
+      { echo "$as_me: error: invalid package name: $ac_package" >&2
+   { (exit 1); exit 1; }; }
+    ac_package=`echo $ac_package | sed 's/-/_/g'`
+    eval "with_$ac_package=no" ;;
+
+  --x)
+    # Obsolete; use --with-x.
+    with_x=yes ;;
+
+  -x-includes | --x-includes | --x-include | --x-includ | --x-inclu \
+  | --x-incl | --x-inc | --x-in | --x-i)
+    ac_prev=x_includes ;;
+  -x-includes=* | --x-includes=* | --x-include=* | --x-includ=* | --x-inclu=* \
+  | --x-incl=* | --x-inc=* | --x-in=* | --x-i=*)
+    x_includes=$ac_optarg ;;
+
+  -x-libraries | --x-libraries | --x-librarie | --x-librari \
+  | --x-librar | --x-libra | --x-libr | --x-lib | --x-li | --x-l)
+    ac_prev=x_libraries ;;
+  -x-libraries=* | --x-libraries=* | --x-librarie=* | --x-librari=* \
+  | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
+    x_libraries=$ac_optarg ;;
+
+  -*) { echo "$as_me: error: unrecognized option: $ac_option
+Try \`$0 --help' for more information." >&2
+   { (exit 1); exit 1; }; }
+    ;;
+
+  *=*)
+    ac_envvar=`expr "x$ac_option" : 'x\([^=]*\)='`
+    # Reject names that are not valid shell variable names.
+    expr "x$ac_envvar" : ".*[^_$as_cr_alnum]" >/dev/null &&
+      { echo "$as_me: error: invalid variable name: $ac_envvar" >&2
+   { (exit 1); exit 1; }; }
+    ac_optarg=`echo "$ac_optarg" | sed "s/'/'\\\\\\\\''/g"`
+    eval "$ac_envvar='$ac_optarg'"
+    export $ac_envvar ;;
+
+  *)
+    # FIXME: should be removed in autoconf 3.0.
+    echo "$as_me: WARNING: you should use --build, --host, --target" >&2
+    expr "x$ac_option" : ".*[^-._$as_cr_alnum]" >/dev/null &&
+      echo "$as_me: WARNING: invalid host type: $ac_option" >&2
+    : ${build_alias=$ac_option} ${host_alias=$ac_option} ${target_alias=$ac_option}
+    ;;
+
+  esac
+done
+
+if test -n "$ac_prev"; then
+  ac_option=--`echo $ac_prev | sed 's/_/-/g'`
+  { echo "$as_me: error: missing argument to $ac_option" >&2
+   { (exit 1); exit 1; }; }
+fi
+
+# Be sure to have absolute paths.
+for ac_var in exec_prefix prefix
+do
+  eval ac_val=$`echo $ac_var`
+  case $ac_val in
+    [\\/$]* | ?:[\\/]* | NONE | '' ) ;;
+    *)  { echo "$as_me: error: expected an absolute directory name for --$ac_var: $ac_val" >&2
+   { (exit 1); exit 1; }; };;
+  esac
+done
+
+# Be sure to have absolute paths.
+for ac_var in bindir sbindir libexecdir datadir sysconfdir sharedstatedir \
+	      localstatedir libdir includedir oldincludedir infodir mandir
+do
+  eval ac_val=$`echo $ac_var`
+  case $ac_val in
+    [\\/$]* | ?:[\\/]* ) ;;
+    *)  { echo "$as_me: error: expected an absolute directory name for --$ac_var: $ac_val" >&2
+   { (exit 1); exit 1; }; };;
+  esac
+done
+
+# There might be people who depend on the old broken behavior: `$host'
+# used to hold the argument of --host etc.
+# FIXME: To remove some day.
+build=$build_alias
+host=$host_alias
+target=$target_alias
+
+# FIXME: To remove some day.
+if test "x$host_alias" != x; then
+  if test "x$build_alias" = x; then
+    cross_compiling=maybe
+    echo "$as_me: WARNING: If you wanted to set the --build type, don't use --host.
+    If a cross compiler is detected then cross compile mode will be used." >&2
+  elif test "x$build_alias" != "x$host_alias"; then
+    cross_compiling=yes
+  fi
+fi
+
+ac_tool_prefix=
+test -n "$host_alias" && ac_tool_prefix=$host_alias-
+
+test "$silent" = yes && exec 6>/dev/null
+
+
+# Find the source files, if location was not specified.
+if test -z "$srcdir"; then
+  ac_srcdir_defaulted=yes
+  # Try the directory containing this script, then its parent.
+  ac_confdir=`(dirname "$0") 2>/dev/null ||
+$as_expr X"$0" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$0" : 'X\(//\)[^/]' \| \
+	 X"$0" : 'X\(//\)$' \| \
+	 X"$0" : 'X\(/\)' \| \
+	 .     : '\(.\)' 2>/dev/null ||
+echo X"$0" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; }
+  	  /^X\(\/\/\)[^/].*/{ s//\1/; q; }
+  	  /^X\(\/\/\)$/{ s//\1/; q; }
+  	  /^X\(\/\).*/{ s//\1/; q; }
+  	  s/.*/./; q'`
+  srcdir=$ac_confdir
+  if test ! -r $srcdir/$ac_unique_file; then
+    srcdir=..
+  fi
+else
+  ac_srcdir_defaulted=no
+fi
+if test ! -r $srcdir/$ac_unique_file; then
+  if test "$ac_srcdir_defaulted" = yes; then
+    { echo "$as_me: error: cannot find sources ($ac_unique_file) in $ac_confdir or .." >&2
+   { (exit 1); exit 1; }; }
+  else
+    { echo "$as_me: error: cannot find sources ($ac_unique_file) in $srcdir" >&2
+   { (exit 1); exit 1; }; }
+  fi
+fi
+(cd $srcdir && test -r ./$ac_unique_file) 2>/dev/null ||
+  { echo "$as_me: error: sources are in $srcdir, but \`cd $srcdir' does not work" >&2
+   { (exit 1); exit 1; }; }
+srcdir=`echo "$srcdir" | sed 's%\([^\\/]\)[\\/]*$%\1%'`
+ac_env_build_alias_set=${build_alias+set}
+ac_env_build_alias_value=$build_alias
+ac_cv_env_build_alias_set=${build_alias+set}
+ac_cv_env_build_alias_value=$build_alias
+ac_env_host_alias_set=${host_alias+set}
+ac_env_host_alias_value=$host_alias
+ac_cv_env_host_alias_set=${host_alias+set}
+ac_cv_env_host_alias_value=$host_alias
+ac_env_target_alias_set=${target_alias+set}
+ac_env_target_alias_value=$target_alias
+ac_cv_env_target_alias_set=${target_alias+set}
+ac_cv_env_target_alias_value=$target_alias
+ac_env_CXX_set=${CXX+set}
+ac_env_CXX_value=$CXX
+ac_cv_env_CXX_set=${CXX+set}
+ac_cv_env_CXX_value=$CXX
+ac_env_CXXFLAGS_set=${CXXFLAGS+set}
+ac_env_CXXFLAGS_value=$CXXFLAGS
+ac_cv_env_CXXFLAGS_set=${CXXFLAGS+set}
+ac_cv_env_CXXFLAGS_value=$CXXFLAGS
+ac_env_LDFLAGS_set=${LDFLAGS+set}
+ac_env_LDFLAGS_value=$LDFLAGS
+ac_cv_env_LDFLAGS_set=${LDFLAGS+set}
+ac_cv_env_LDFLAGS_value=$LDFLAGS
+ac_env_CPPFLAGS_set=${CPPFLAGS+set}
+ac_env_CPPFLAGS_value=$CPPFLAGS
+ac_cv_env_CPPFLAGS_set=${CPPFLAGS+set}
+ac_cv_env_CPPFLAGS_value=$CPPFLAGS
+ac_env_CC_set=${CC+set}
+ac_env_CC_value=$CC
+ac_cv_env_CC_set=${CC+set}
+ac_cv_env_CC_value=$CC
+ac_env_CFLAGS_set=${CFLAGS+set}
+ac_env_CFLAGS_value=$CFLAGS
+ac_cv_env_CFLAGS_set=${CFLAGS+set}
+ac_cv_env_CFLAGS_value=$CFLAGS
+ac_env_CXXCPP_set=${CXXCPP+set}
+ac_env_CXXCPP_value=$CXXCPP
+ac_cv_env_CXXCPP_set=${CXXCPP+set}
+ac_cv_env_CXXCPP_value=$CXXCPP
+
+#
+# Report the --help message.
+#
+if test "$ac_init_help" = "long"; then
+  # Omit some internal or obsolete options to make the list less imposing.
+  # This message is too long to be a string in the A/UX 3.1 sh.
+  cat <<_ACEOF
+\`configure' configures this package to adapt to many kinds of systems.
+
+Usage: $0 [OPTION]... [VAR=VALUE]...
+
+To assign environment variables (e.g., CC, CFLAGS...), specify them as
+VAR=VALUE.  See below for descriptions of some of the useful variables.
+
+Defaults for the options are specified in brackets.
+
+Configuration:
+  -h, --help              display this help and exit
+      --help=short        display options specific to this package
+      --help=recursive    display the short help of all the included packages
+  -V, --version           display version information and exit
+  -q, --quiet, --silent   do not print \`checking...' messages
+      --cache-file=FILE   cache test results in FILE [disabled]
+  -C, --config-cache      alias for \`--cache-file=config.cache'
+  -n, --no-create         do not create output files
+      --srcdir=DIR        find the sources in DIR [configure dir or \`..']
+
+_ACEOF
+
+  cat <<_ACEOF
+Installation directories:
+  --prefix=PREFIX         install architecture-independent files in PREFIX
+			  [$ac_default_prefix]
+  --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
+			  [PREFIX]
+
+By default, \`make install' will install all the files in
+\`$ac_default_prefix/bin', \`$ac_default_prefix/lib' etc.  You can specify
+an installation prefix other than \`$ac_default_prefix' using \`--prefix',
+for instance \`--prefix=\$HOME'.
+
+For better control, use the options below.
+
+Fine tuning of the installation directories:
+  --bindir=DIR           user executables [EPREFIX/bin]
+  --sbindir=DIR          system admin executables [EPREFIX/sbin]
+  --libexecdir=DIR       program executables [EPREFIX/libexec]
+  --datadir=DIR          read-only architecture-independent data [PREFIX/share]
+  --sysconfdir=DIR       read-only single-machine data [PREFIX/etc]
+  --sharedstatedir=DIR   modifiable architecture-independent data [PREFIX/com]
+  --localstatedir=DIR    modifiable single-machine data [PREFIX/var]
+  --libdir=DIR           object code libraries [EPREFIX/lib]
+  --includedir=DIR       C header files [PREFIX/include]
+  --oldincludedir=DIR    C header files for non-gcc [/usr/include]
+  --infodir=DIR          info documentation [PREFIX/info]
+  --mandir=DIR           man documentation [PREFIX/man]
+_ACEOF
+
+  cat <<\_ACEOF
+
+X features:
+  --x-includes=DIR    X include files are in DIR
+  --x-libraries=DIR   X library files are in DIR
+_ACEOF
+fi
+
+if test -n "$ac_init_help"; then
+
+  cat <<\_ACEOF
+
+Optional Packages:
+  --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
+  --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
+  --with-x                use the X Window System
+
+Some influential environment variables:
+  CXX         C++ compiler command
+  CXXFLAGS    C++ compiler flags
+  LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
+              nonstandard directory <lib dir>
+  CPPFLAGS    C/C++ preprocessor flags, e.g. -I<include dir> if you have
+              headers in a nonstandard directory <include dir>
+  CC          C compiler command
+  CFLAGS      C compiler flags
+  CXXCPP      C++ preprocessor
+
+Use these variables to override the choices made by `configure' or to help
+it to find libraries and programs with nonstandard names/locations.
+
+_ACEOF
+fi
+
+if test "$ac_init_help" = "recursive"; then
+  # If there are subdirs, report their specific --help.
+  ac_popdir=`pwd`
+  for ac_dir in : $ac_subdirs_all; do test "x$ac_dir" = x: && continue
+    test -d $ac_dir || continue
+    ac_builddir=.
+
+if test "$ac_dir" != .; then
+  ac_dir_suffix=/`echo "$ac_dir" | sed 's,^\.[\\/],,'`
+  # A "../" for each directory in $ac_dir_suffix.
+  ac_top_builddir=`echo "$ac_dir_suffix" | sed 's,/[^\\/]*,../,g'`
+else
+  ac_dir_suffix= ac_top_builddir=
+fi
+
+case $srcdir in
+  .)  # No --srcdir option.  We are building in place.
+    ac_srcdir=.
+    if test -z "$ac_top_builddir"; then
+       ac_top_srcdir=.
+    else
+       ac_top_srcdir=`echo $ac_top_builddir | sed 's,/$,,'`
+    fi ;;
+  [\\/]* | ?:[\\/]* )  # Absolute path.
+    ac_srcdir=$srcdir$ac_dir_suffix;
+    ac_top_srcdir=$srcdir ;;
+  *) # Relative path.
+    ac_srcdir=$ac_top_builddir$srcdir$ac_dir_suffix
+    ac_top_srcdir=$ac_top_builddir$srcdir ;;
+esac
+
+# Do not use `cd foo && pwd` to compute absolute paths, because
+# the directories may not exist.
+case `pwd` in
+.) ac_abs_builddir="$ac_dir";;
+*)
+  case "$ac_dir" in
+  .) ac_abs_builddir=`pwd`;;
+  [\\/]* | ?:[\\/]* ) ac_abs_builddir="$ac_dir";;
+  *) ac_abs_builddir=`pwd`/"$ac_dir";;
+  esac;;
+esac
+case $ac_abs_builddir in
+.) ac_abs_top_builddir=${ac_top_builddir}.;;
+*)
+  case ${ac_top_builddir}. in
+  .) ac_abs_top_builddir=$ac_abs_builddir;;
+  [\\/]* | ?:[\\/]* ) ac_abs_top_builddir=${ac_top_builddir}.;;
+  *) ac_abs_top_builddir=$ac_abs_builddir/${ac_top_builddir}.;;
+  esac;;
+esac
+case $ac_abs_builddir in
+.) ac_abs_srcdir=$ac_srcdir;;
+*)
+  case $ac_srcdir in
+  .) ac_abs_srcdir=$ac_abs_builddir;;
+  [\\/]* | ?:[\\/]* ) ac_abs_srcdir=$ac_srcdir;;
+  *) ac_abs_srcdir=$ac_abs_builddir/$ac_srcdir;;
+  esac;;
+esac
+case $ac_abs_builddir in
+.) ac_abs_top_srcdir=$ac_top_srcdir;;
+*)
+  case $ac_top_srcdir in
+  .) ac_abs_top_srcdir=$ac_abs_builddir;;
+  [\\/]* | ?:[\\/]* ) ac_abs_top_srcdir=$ac_top_srcdir;;
+  *) ac_abs_top_srcdir=$ac_abs_builddir/$ac_top_srcdir;;
+  esac;;
+esac
+
+    cd $ac_dir
+    # Check for guested configure; otherwise get Cygnus style configure.
+    if test -f $ac_srcdir/configure.gnu; then
+      echo
+      $SHELL $ac_srcdir/configure.gnu  --help=recursive
+    elif test -f $ac_srcdir/configure; then
+      echo
+      $SHELL $ac_srcdir/configure  --help=recursive
+    elif test -f $ac_srcdir/configure.ac ||
+	   test -f $ac_srcdir/configure.in; then
+      echo
+      $ac_configure --help
+    else
+      echo "$as_me: WARNING: no configuration information is in $ac_dir" >&2
+    fi
+    cd $ac_popdir
+  done
+fi
+
+test -n "$ac_init_help" && exit 0
+if $ac_init_version; then
+  cat <<\_ACEOF
+
+Copyright (C) 2003 Free Software Foundation, Inc.
+This configure script is free software; the Free Software Foundation
+gives unlimited permission to copy, distribute and modify it.
+_ACEOF
+  exit 0
+fi
+exec 5>config.log
+cat >&5 <<_ACEOF
+This file contains any messages produced by compilers while
+running configure, to aid debugging if configure makes a mistake.
+
+It was created by $as_me, which was
+generated by GNU Autoconf 2.59.  Invocation command line was
+
+  $ $0 $@
+
+_ACEOF
+{
+cat <<_ASUNAME
+## --------- ##
+## Platform. ##
+## --------- ##
+
+hostname = `(hostname || uname -n) 2>/dev/null | sed 1q`
+uname -m = `(uname -m) 2>/dev/null || echo unknown`
+uname -r = `(uname -r) 2>/dev/null || echo unknown`
+uname -s = `(uname -s) 2>/dev/null || echo unknown`
+uname -v = `(uname -v) 2>/dev/null || echo unknown`
+
+/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null || echo unknown`
+/bin/uname -X     = `(/bin/uname -X) 2>/dev/null     || echo unknown`
+
+/bin/arch              = `(/bin/arch) 2>/dev/null              || echo unknown`
+/usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null       || echo unknown`
+/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null || echo unknown`
+hostinfo               = `(hostinfo) 2>/dev/null               || echo unknown`
+/bin/machine           = `(/bin/machine) 2>/dev/null           || echo unknown`
+/usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null       || echo unknown`
+/bin/universe          = `(/bin/universe) 2>/dev/null          || echo unknown`
+
+_ASUNAME
+
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  echo "PATH: $as_dir"
+done
+
+} >&5
+
+cat >&5 <<_ACEOF
+
+
+## ----------- ##
+## Core tests. ##
+## ----------- ##
+
+_ACEOF
+
+
+# Keep a trace of the command line.
+# Strip out --no-create and --no-recursion so they do not pile up.
+# Strip out --silent because we don't want to record it for future runs.
+# Also quote any args containing shell meta-characters.
+# Make two passes to allow for proper duplicate-argument suppression.
+ac_configure_args=
+ac_configure_args0=
+ac_configure_args1=
+ac_sep=
+ac_must_keep_next=false
+for ac_pass in 1 2
+do
+  for ac_arg
+  do
+    case $ac_arg in
+    -no-create | --no-c* | -n | -no-recursion | --no-r*) continue ;;
+    -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+    | -silent | --silent | --silen | --sile | --sil)
+      continue ;;
+    *" "*|*"	"*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\"\']*)
+      ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
+    esac
+    case $ac_pass in
+    1) ac_configure_args0="$ac_configure_args0 '$ac_arg'" ;;
+    2)
+      ac_configure_args1="$ac_configure_args1 '$ac_arg'"
+      if test $ac_must_keep_next = true; then
+	ac_must_keep_next=false # Got value, back to normal.
+      else
+	case $ac_arg in
+	  *=* | --config-cache | -C | -disable-* | --disable-* \
+	  | -enable-* | --enable-* | -gas | --g* | -nfp | --nf* \
+	  | -q | -quiet | --q* | -silent | --sil* | -v | -verb* \
+	  | -with-* | --with-* | -without-* | --without-* | --x)
+	    case "$ac_configure_args0 " in
+	      "$ac_configure_args1"*" '$ac_arg' "* ) continue ;;
+	    esac
+	    ;;
+	  -* ) ac_must_keep_next=true ;;
+	esac
+      fi
+      ac_configure_args="$ac_configure_args$ac_sep'$ac_arg'"
+      # Get rid of the leading space.
+      ac_sep=" "
+      ;;
+    esac
+  done
+done
+$as_unset ac_configure_args0 || test "${ac_configure_args0+set}" != set || { ac_configure_args0=; export ac_configure_args0; }
+$as_unset ac_configure_args1 || test "${ac_configure_args1+set}" != set || { ac_configure_args1=; export ac_configure_args1; }
+
+# When interrupted or exit'd, cleanup temporary files, and complete
+# config.log.  We remove comments because anyway the quotes in there
+# would cause problems or look ugly.
+# WARNING: Be sure not to use single quotes in there, as some shells,
+# such as our DU 5.0 friend, will then `close' the trap.
+trap 'exit_status=$?
+  # Save into config.log some information that might help in debugging.
+  {
+    echo
+
+    cat <<\_ASBOX
+## ---------------- ##
+## Cache variables. ##
+## ---------------- ##
+_ASBOX
+    echo
+    # The following way of writing the cache mishandles newlines in values,
+{
+  (set) 2>&1 |
+    case `(ac_space='"'"' '"'"'; set | grep ac_space) 2>&1` in
+    *ac_space=\ *)
+      sed -n \
+	"s/'"'"'/'"'"'\\\\'"'"''"'"'/g;
+	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='"'"'\\2'"'"'/p"
+      ;;
+    *)
+      sed -n \
+	"s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1=\\2/p"
+      ;;
+    esac;
+}
+    echo
+
+    cat <<\_ASBOX
+## ----------------- ##
+## Output variables. ##
+## ----------------- ##
+_ASBOX
+    echo
+    for ac_var in $ac_subst_vars
+    do
+      eval ac_val=$`echo $ac_var`
+      echo "$ac_var='"'"'$ac_val'"'"'"
+    done | sort
+    echo
+
+    if test -n "$ac_subst_files"; then
+      cat <<\_ASBOX
+## ------------- ##
+## Output files. ##
+## ------------- ##
+_ASBOX
+      echo
+      for ac_var in $ac_subst_files
+      do
+	eval ac_val=$`echo $ac_var`
+	echo "$ac_var='"'"'$ac_val'"'"'"
+      done | sort
+      echo
+    fi
+
+    if test -s confdefs.h; then
+      cat <<\_ASBOX
+## ----------- ##
+## confdefs.h. ##
+## ----------- ##
+_ASBOX
+      echo
+      sed "/^$/d" confdefs.h | sort
+      echo
+    fi
+    test "$ac_signal" != 0 &&
+      echo "$as_me: caught signal $ac_signal"
+    echo "$as_me: exit $exit_status"
+  } >&5
+  rm -f core *.core &&
+  rm -rf conftest* confdefs* conf$$* $ac_clean_files &&
+    exit $exit_status
+     ' 0
+for ac_signal in 1 2 13 15; do
+  trap 'ac_signal='$ac_signal'; { (exit 1); exit 1; }' $ac_signal
+done
+ac_signal=0
+
+# confdefs.h avoids OS command line length limits that DEFS can exceed.
+rm -rf conftest* confdefs.h
+# AIX cpp loses on an empty file, so make sure it contains at least a newline.
+echo >confdefs.h
+
+# Predefined preprocessor variables.
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_NAME "$PACKAGE_NAME"
+_ACEOF
+
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_TARNAME "$PACKAGE_TARNAME"
+_ACEOF
+
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_VERSION "$PACKAGE_VERSION"
+_ACEOF
+
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_STRING "$PACKAGE_STRING"
+_ACEOF
+
+
+cat >>confdefs.h <<_ACEOF
+#define PACKAGE_BUGREPORT "$PACKAGE_BUGREPORT"
+_ACEOF
+
+
+# Let the site file select an alternate cache file if it wants to.
+# Prefer explicitly selected file to automatically selected ones.
+if test -z "$CONFIG_SITE"; then
+  if test "x$prefix" != xNONE; then
+    CONFIG_SITE="$prefix/share/config.site $prefix/etc/config.site"
+  else
+    CONFIG_SITE="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site"
+  fi
+fi
+for ac_site_file in $CONFIG_SITE; do
+  if test -r "$ac_site_file"; then
+    { echo "$as_me:$LINENO: loading site script $ac_site_file" >&5
+echo "$as_me: loading site script $ac_site_file" >&6;}
+    sed 's/^/| /' "$ac_site_file" >&5
+    . "$ac_site_file"
+  fi
+done
+
+if test -r "$cache_file"; then
+  # Some versions of bash will fail to source /dev/null (special
+  # files actually), so we avoid doing that.
+  if test -f "$cache_file"; then
+    { echo "$as_me:$LINENO: loading cache $cache_file" >&5
+echo "$as_me: loading cache $cache_file" >&6;}
+    case $cache_file in
+      [\\/]* | ?:[\\/]* ) . $cache_file;;
+      *)                      . ./$cache_file;;
+    esac
+  fi
+else
+  { echo "$as_me:$LINENO: creating cache $cache_file" >&5
+echo "$as_me: creating cache $cache_file" >&6;}
+  >$cache_file
+fi
+
+# Check that the precious variables saved in the cache have kept the same
+# value.
+ac_cache_corrupted=false
+for ac_var in `(set) 2>&1 |
+	       sed -n 's/^ac_env_\([a-zA-Z_0-9]*\)_set=.*/\1/p'`; do
+  eval ac_old_set=\$ac_cv_env_${ac_var}_set
+  eval ac_new_set=\$ac_env_${ac_var}_set
+  eval ac_old_val="\$ac_cv_env_${ac_var}_value"
+  eval ac_new_val="\$ac_env_${ac_var}_value"
+  case $ac_old_set,$ac_new_set in
+    set,)
+      { echo "$as_me:$LINENO: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
+echo "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;}
+      ac_cache_corrupted=: ;;
+    ,set)
+      { echo "$as_me:$LINENO: error: \`$ac_var' was not set in the previous run" >&5
+echo "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
+      ac_cache_corrupted=: ;;
+    ,);;
+    *)
+      if test "x$ac_old_val" != "x$ac_new_val"; then
+	{ echo "$as_me:$LINENO: error: \`$ac_var' has changed since the previous run:" >&5
+echo "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;}
+	{ echo "$as_me:$LINENO:   former value:  $ac_old_val" >&5
+echo "$as_me:   former value:  $ac_old_val" >&2;}
+	{ echo "$as_me:$LINENO:   current value: $ac_new_val" >&5
+echo "$as_me:   current value: $ac_new_val" >&2;}
+	ac_cache_corrupted=:
+      fi;;
+  esac
+  # Pass precious variables to config.status.
+  if test "$ac_new_set" = set; then
+    case $ac_new_val in
+    *" "*|*"	"*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\"\']*)
+      ac_arg=$ac_var=`echo "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
+    *) ac_arg=$ac_var=$ac_new_val ;;
+    esac
+    case " $ac_configure_args " in
+      *" '$ac_arg' "*) ;; # Avoid dups.  Use of quotes ensures accuracy.
+      *) ac_configure_args="$ac_configure_args '$ac_arg'" ;;
+    esac
+  fi
+done
+if $ac_cache_corrupted; then
+  { echo "$as_me:$LINENO: error: changes in the environment can compromise the build" >&5
+echo "$as_me: error: changes in the environment can compromise the build" >&2;}
+  { { echo "$as_me:$LINENO: error: run \`make distclean' and/or \`rm $cache_file' and start over" >&5
+echo "$as_me: error: run \`make distclean' and/or \`rm $cache_file' and start over" >&2;}
+   { (exit 1); exit 1; }; }
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+CXXFLAGS="-O3"
+CFLAGS="-O3"
+
+
+LIBSTATIC=""
+LIBSHARED=""
+
+
+if test -d "../nx-X11/include" ; then
+    CXXFLAGS="$CXXFLAGS -I../nx-X11/exports/include -I../nx-X11/lib/X11 \
+                        -I../nx-X11/include -I../nx-X11/programs/Xserver/include"
+    CFLAGS="$CFLAGS -I../nx-X11/exports/include -I../nx-X11/lib/X11 \
+                    -I../nx-X11/include -I../nx-X11/programs/Xserver/include"
+    LDFLAGS="$LDFLAGS -L../nx-X11/exports/lib"
+fi
+
+
+ac_ext=cc
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+if test -n "$ac_tool_prefix"; then
+  for ac_prog in $CCC g++ c++ gpp aCC CC cxx cc++ cl FCC KCC RCC xlC_r xlC
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_CXX+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$CXX"; then
+  ac_cv_prog_CXX="$CXX" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CXX="$ac_tool_prefix$ac_prog"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+CXX=$ac_cv_prog_CXX
+if test -n "$CXX"; then
+  echo "$as_me:$LINENO: result: $CXX" >&5
+echo "${ECHO_T}$CXX" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+    test -n "$CXX" && break
+  done
+fi
+if test -z "$CXX"; then
+  ac_ct_CXX=$CXX
+  for ac_prog in $CCC g++ c++ gpp aCC CC cxx cc++ cl FCC KCC RCC xlC_r xlC
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_ac_ct_CXX+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$ac_ct_CXX"; then
+  ac_cv_prog_ac_ct_CXX="$ac_ct_CXX" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CXX="$ac_prog"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+ac_ct_CXX=$ac_cv_prog_ac_ct_CXX
+if test -n "$ac_ct_CXX"; then
+  echo "$as_me:$LINENO: result: $ac_ct_CXX" >&5
+echo "${ECHO_T}$ac_ct_CXX" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+  test -n "$ac_ct_CXX" && break
+done
+test -n "$ac_ct_CXX" || ac_ct_CXX="g++"
+
+  CXX=$ac_ct_CXX
+fi
+
+
+# Provide some information about the compiler.
+echo "$as_me:$LINENO:" \
+     "checking for C++ compiler version" >&5
+ac_compiler=`set X $ac_compile; echo $2`
+{ (eval echo "$as_me:$LINENO: \"$ac_compiler --version </dev/null >&5\"") >&5
+  (eval $ac_compiler --version </dev/null >&5) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }
+{ (eval echo "$as_me:$LINENO: \"$ac_compiler -v </dev/null >&5\"") >&5
+  (eval $ac_compiler -v </dev/null >&5) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }
+{ (eval echo "$as_me:$LINENO: \"$ac_compiler -V </dev/null >&5\"") >&5
+  (eval $ac_compiler -V </dev/null >&5) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }
+
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files a.out a.exe b.out"
+# Try to create an executable without -o first, disregard a.out.
+# It will help us diagnose broken compilers, and finding out an intuition
+# of exeext.
+echo "$as_me:$LINENO: checking for C++ compiler default output file name" >&5
+echo $ECHO_N "checking for C++ compiler default output file name... $ECHO_C" >&6
+ac_link_default=`echo "$ac_link" | sed 's/ -o *conftest[^ ]*//'`
+if { (eval echo "$as_me:$LINENO: \"$ac_link_default\"") >&5
+  (eval $ac_link_default) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; then
+  # Find the output, starting from the most likely.  This scheme is
+# not robust to junk in `.', hence go to wildcards (a.*) only as a last
+# resort.
+
+# Be careful to initialize this variable, since it used to be cached.
+# Otherwise an old cache value of `no' led to `EXEEXT = no' in a Makefile.
+ac_cv_exeext=
+# b.out is created by i960 compilers.
+for ac_file in a_out.exe a.exe conftest.exe a.out conftest a.* conftest.* b.out
+do
+  test -f "$ac_file" || continue
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.o | *.obj )
+	;;
+    conftest.$ac_ext )
+	# This is the source file.
+	;;
+    [ab].out )
+	# We found the default executable, but exeext='' is most
+	# certainly right.
+	break;;
+    *.* )
+	ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
+	# FIXME: I believe we export ac_cv_exeext for Libtool,
+	# but it would be cool to find out if it's true.  Does anybody
+	# maintain Libtool? --akim.
+	export ac_cv_exeext
+	break;;
+    * )
+	break;;
+  esac
+done
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+{ { echo "$as_me:$LINENO: error: C++ compiler cannot create executables
+See \`config.log' for more details." >&5
+echo "$as_me: error: C++ compiler cannot create executables
+See \`config.log' for more details." >&2;}
+   { (exit 77); exit 77; }; }
+fi
+
+ac_exeext=$ac_cv_exeext
+echo "$as_me:$LINENO: result: $ac_file" >&5
+echo "${ECHO_T}$ac_file" >&6
+
+# Check the compiler produces executables we can run.  If not, either
+# the compiler is broken, or we cross compile.
+echo "$as_me:$LINENO: checking whether the C++ compiler works" >&5
+echo $ECHO_N "checking whether the C++ compiler works... $ECHO_C" >&6
+# FIXME: These cross compiler hacks should be removed for Autoconf 3.0
+# If not cross compiling, check that we can run a simple program.
+if test "$cross_compiling" != yes; then
+  if { ac_try='./$ac_file'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+    cross_compiling=no
+  else
+    if test "$cross_compiling" = maybe; then
+	cross_compiling=yes
+    else
+	{ { echo "$as_me:$LINENO: error: cannot run C++ compiled programs.
+If you meant to cross compile, use \`--host'.
+See \`config.log' for more details." >&5
+echo "$as_me: error: cannot run C++ compiled programs.
+If you meant to cross compile, use \`--host'.
+See \`config.log' for more details." >&2;}
+   { (exit 1); exit 1; }; }
+    fi
+  fi
+fi
+echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+
+rm -f a.out a.exe conftest$ac_cv_exeext b.out
+ac_clean_files=$ac_clean_files_save
+# Check the compiler produces executables we can run.  If not, either
+# the compiler is broken, or we cross compile.
+echo "$as_me:$LINENO: checking whether we are cross compiling" >&5
+echo $ECHO_N "checking whether we are cross compiling... $ECHO_C" >&6
+echo "$as_me:$LINENO: result: $cross_compiling" >&5
+echo "${ECHO_T}$cross_compiling" >&6
+
+echo "$as_me:$LINENO: checking for suffix of executables" >&5
+echo $ECHO_N "checking for suffix of executables... $ECHO_C" >&6
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; then
+  # If both `conftest.exe' and `conftest' are `present' (well, observable)
+# catch `conftest.exe'.  For instance with Cygwin, `ls conftest' will
+# work properly (i.e., refer to `conftest.exe'), while it won't with
+# `rm'.
+for ac_file in conftest.exe conftest conftest.*; do
+  test -f "$ac_file" || continue
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg | *.o | *.obj ) ;;
+    *.* ) ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
+	  export ac_cv_exeext
+	  break;;
+    * ) break;;
+  esac
+done
+else
+  { { echo "$as_me:$LINENO: error: cannot compute suffix of executables: cannot compile and link
+See \`config.log' for more details." >&5
+echo "$as_me: error: cannot compute suffix of executables: cannot compile and link
+See \`config.log' for more details." >&2;}
+   { (exit 1); exit 1; }; }
+fi
+
+rm -f conftest$ac_cv_exeext
+echo "$as_me:$LINENO: result: $ac_cv_exeext" >&5
+echo "${ECHO_T}$ac_cv_exeext" >&6
+
+rm -f conftest.$ac_ext
+EXEEXT=$ac_cv_exeext
+ac_exeext=$EXEEXT
+echo "$as_me:$LINENO: checking for suffix of object files" >&5
+echo $ECHO_N "checking for suffix of object files... $ECHO_C" >&6
+if test "${ac_cv_objext+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.o conftest.obj
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; then
+  for ac_file in `(ls conftest.o conftest.obj; ls conftest.*) 2>/dev/null`; do
+  case $ac_file in
+    *.$ac_ext | *.xcoff | *.tds | *.d | *.pdb | *.xSYM | *.bb | *.bbg ) ;;
+    *) ac_cv_objext=`expr "$ac_file" : '.*\.\(.*\)'`
+       break;;
+  esac
+done
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+{ { echo "$as_me:$LINENO: error: cannot compute suffix of object files: cannot compile
+See \`config.log' for more details." >&5
+echo "$as_me: error: cannot compute suffix of object files: cannot compile
+See \`config.log' for more details." >&2;}
+   { (exit 1); exit 1; }; }
+fi
+
+rm -f conftest.$ac_cv_objext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_objext" >&5
+echo "${ECHO_T}$ac_cv_objext" >&6
+OBJEXT=$ac_cv_objext
+ac_objext=$OBJEXT
+echo "$as_me:$LINENO: checking whether we are using the GNU C++ compiler" >&5
+echo $ECHO_N "checking whether we are using the GNU C++ compiler... $ECHO_C" >&6
+if test "${ac_cv_cxx_compiler_gnu+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+#ifndef __GNUC__
+       choke me
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_compiler_gnu=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_compiler_gnu=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+ac_cv_cxx_compiler_gnu=$ac_compiler_gnu
+
+fi
+echo "$as_me:$LINENO: result: $ac_cv_cxx_compiler_gnu" >&5
+echo "${ECHO_T}$ac_cv_cxx_compiler_gnu" >&6
+GXX=`test $ac_compiler_gnu = yes && echo yes`
+ac_test_CXXFLAGS=${CXXFLAGS+set}
+ac_save_CXXFLAGS=$CXXFLAGS
+CXXFLAGS="-g"
+echo "$as_me:$LINENO: checking whether $CXX accepts -g" >&5
+echo $ECHO_N "checking whether $CXX accepts -g... $ECHO_C" >&6
+if test "${ac_cv_prog_cxx_g+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_prog_cxx_g=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_prog_cxx_g=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_prog_cxx_g" >&5
+echo "${ECHO_T}$ac_cv_prog_cxx_g" >&6
+if test "$ac_test_CXXFLAGS" = set; then
+  CXXFLAGS=$ac_save_CXXFLAGS
+elif test $ac_cv_prog_cxx_g = yes; then
+  if test "$GXX" = yes; then
+    CXXFLAGS="-g -O2"
+  else
+    CXXFLAGS="-g"
+  fi
+else
+  if test "$GXX" = yes; then
+    CXXFLAGS="-O2"
+  else
+    CXXFLAGS=
+  fi
+fi
+for ac_declaration in \
+   '' \
+   'extern "C" void std::exit (int) throw (); using std::exit;' \
+   'extern "C" void std::exit (int); using std::exit;' \
+   'extern "C" void exit (int) throw ();' \
+   'extern "C" void exit (int);' \
+   'void exit (int);'
+do
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_declaration
+#include <stdlib.h>
+int
+main ()
+{
+exit (42);
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  :
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+continue
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_declaration
+int
+main ()
+{
+exit (42);
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  break
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+done
+rm -f conftest*
+if test -n "$ac_declaration"; then
+  echo '#ifdef __cplusplus' >>confdefs.h
+  echo $ac_declaration      >>confdefs.h
+  echo '#endif'             >>confdefs.h
+fi
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}gcc; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_CC+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}gcc"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  echo "$as_me:$LINENO: result: $CC" >&5
+echo "${ECHO_T}$CC" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+fi
+if test -z "$ac_cv_prog_CC"; then
+  ac_ct_CC=$CC
+  # Extract the first word of "gcc", so it can be a program name with args.
+set dummy gcc; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_ac_ct_CC+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="gcc"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  echo "$as_me:$LINENO: result: $ac_ct_CC" >&5
+echo "${ECHO_T}$ac_ct_CC" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+  CC=$ac_ct_CC
+else
+  CC="$ac_cv_prog_CC"
+fi
+
+if test -z "$CC"; then
+  if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}cc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}cc; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_CC+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="${ac_tool_prefix}cc"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  echo "$as_me:$LINENO: result: $CC" >&5
+echo "${ECHO_T}$CC" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+fi
+if test -z "$ac_cv_prog_CC"; then
+  ac_ct_CC=$CC
+  # Extract the first word of "cc", so it can be a program name with args.
+set dummy cc; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_ac_ct_CC+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="cc"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  echo "$as_me:$LINENO: result: $ac_ct_CC" >&5
+echo "${ECHO_T}$ac_ct_CC" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+  CC=$ac_ct_CC
+else
+  CC="$ac_cv_prog_CC"
+fi
+
+fi
+if test -z "$CC"; then
+  # Extract the first word of "cc", so it can be a program name with args.
+set dummy cc; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_CC+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+  ac_prog_rejected=no
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    if test "$as_dir/$ac_word$ac_exec_ext" = "/usr/ucb/cc"; then
+       ac_prog_rejected=yes
+       continue
+     fi
+    ac_cv_prog_CC="cc"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+if test $ac_prog_rejected = yes; then
+  # We found a bogon in the path, so make sure we never use it.
+  set dummy $ac_cv_prog_CC
+  shift
+  if test $# != 0; then
+    # We chose a different compiler from the bogus one.
+    # However, it has the same basename, so the bogon will be chosen
+    # first if we set CC to just the basename; use the full file name.
+    shift
+    ac_cv_prog_CC="$as_dir/$ac_word${1+' '}$@"
+  fi
+fi
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  echo "$as_me:$LINENO: result: $CC" >&5
+echo "${ECHO_T}$CC" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+fi
+if test -z "$CC"; then
+  if test -n "$ac_tool_prefix"; then
+  for ac_prog in cl
+  do
+    # Extract the first word of "$ac_tool_prefix$ac_prog", so it can be a program name with args.
+set dummy $ac_tool_prefix$ac_prog; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_CC+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_CC="$ac_tool_prefix$ac_prog"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+CC=$ac_cv_prog_CC
+if test -n "$CC"; then
+  echo "$as_me:$LINENO: result: $CC" >&5
+echo "${ECHO_T}$CC" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+    test -n "$CC" && break
+  done
+fi
+if test -z "$CC"; then
+  ac_ct_CC=$CC
+  for ac_prog in cl
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_prog_ac_ct_CC+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  if test -n "$ac_ct_CC"; then
+  ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_CC="$ac_prog"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+fi
+fi
+ac_ct_CC=$ac_cv_prog_ac_ct_CC
+if test -n "$ac_ct_CC"; then
+  echo "$as_me:$LINENO: result: $ac_ct_CC" >&5
+echo "${ECHO_T}$ac_ct_CC" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+  test -n "$ac_ct_CC" && break
+done
+
+  CC=$ac_ct_CC
+fi
+
+fi
+
+
+test -z "$CC" && { { echo "$as_me:$LINENO: error: no acceptable C compiler found in \$PATH
+See \`config.log' for more details." >&5
+echo "$as_me: error: no acceptable C compiler found in \$PATH
+See \`config.log' for more details." >&2;}
+   { (exit 1); exit 1; }; }
+
+# Provide some information about the compiler.
+echo "$as_me:$LINENO:" \
+     "checking for C compiler version" >&5
+ac_compiler=`set X $ac_compile; echo $2`
+{ (eval echo "$as_me:$LINENO: \"$ac_compiler --version </dev/null >&5\"") >&5
+  (eval $ac_compiler --version </dev/null >&5) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }
+{ (eval echo "$as_me:$LINENO: \"$ac_compiler -v </dev/null >&5\"") >&5
+  (eval $ac_compiler -v </dev/null >&5) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }
+{ (eval echo "$as_me:$LINENO: \"$ac_compiler -V </dev/null >&5\"") >&5
+  (eval $ac_compiler -V </dev/null >&5) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }
+
+echo "$as_me:$LINENO: checking whether we are using the GNU C compiler" >&5
+echo $ECHO_N "checking whether we are using the GNU C compiler... $ECHO_C" >&6
+if test "${ac_cv_c_compiler_gnu+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+#ifndef __GNUC__
+       choke me
+#endif
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_compiler_gnu=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_compiler_gnu=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+ac_cv_c_compiler_gnu=$ac_compiler_gnu
+
+fi
+echo "$as_me:$LINENO: result: $ac_cv_c_compiler_gnu" >&5
+echo "${ECHO_T}$ac_cv_c_compiler_gnu" >&6
+GCC=`test $ac_compiler_gnu = yes && echo yes`
+ac_test_CFLAGS=${CFLAGS+set}
+ac_save_CFLAGS=$CFLAGS
+CFLAGS="-g"
+echo "$as_me:$LINENO: checking whether $CC accepts -g" >&5
+echo $ECHO_N "checking whether $CC accepts -g... $ECHO_C" >&6
+if test "${ac_cv_prog_cc_g+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_prog_cc_g=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_prog_cc_g=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_prog_cc_g" >&5
+echo "${ECHO_T}$ac_cv_prog_cc_g" >&6
+if test "$ac_test_CFLAGS" = set; then
+  CFLAGS=$ac_save_CFLAGS
+elif test $ac_cv_prog_cc_g = yes; then
+  if test "$GCC" = yes; then
+    CFLAGS="-g -O2"
+  else
+    CFLAGS="-g"
+  fi
+else
+  if test "$GCC" = yes; then
+    CFLAGS="-O2"
+  else
+    CFLAGS=
+  fi
+fi
+echo "$as_me:$LINENO: checking for $CC option to accept ANSI C" >&5
+echo $ECHO_N "checking for $CC option to accept ANSI C... $ECHO_C" >&6
+if test "${ac_cv_prog_cc_stdc+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_cv_prog_cc_stdc=no
+ac_save_CC=$CC
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <stdarg.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+/* Most of the following tests are stolen from RCS 5.7's src/conf.sh.  */
+struct buf { int x; };
+FILE * (*rcsopen) (struct buf *, struct stat *, int);
+static char *e (p, i)
+     char **p;
+     int i;
+{
+  return p[i];
+}
+static char *f (char * (*g) (char **, int), char **p, ...)
+{
+  char *s;
+  va_list v;
+  va_start (v,p);
+  s = g (p, va_arg (v,int));
+  va_end (v);
+  return s;
+}
+
+/* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
+   function prototypes and stuff, but not '\xHH' hex character constants.
+   These don't provoke an error unfortunately, instead are silently treated
+   as 'x'.  The following induces an error, until -std1 is added to get
+   proper ANSI mode.  Curiously '\x00'!='x' always comes out true, for an
+   array size at least.  It's necessary to write '\x00'==0 to get something
+   that's true only with -std1.  */
+int osf4_cc_array ['\x00' == 0 ? 1 : -1];
+
+int test (int i, double x);
+struct s1 {int (*f) (int a);};
+struct s2 {int (*f) (double a);};
+int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int);
+int argc;
+char **argv;
+int
+main ()
+{
+return f (e, argv, 0) != argv[0]  ||  f (e, argv, 1) != argv[1];
+  ;
+  return 0;
+}
+_ACEOF
+# Don't try gcc -ansi; that turns off useful extensions and
+# breaks some systems' header files.
+# AIX			-qlanglvl=ansi
+# Ultrix and OSF/1	-std1
+# HP-UX 10.20 and later	-Ae
+# HP-UX older versions	-Aa -D_HPUX_SOURCE
+# SVR4			-Xc -D__EXTENSIONS__
+for ac_arg in "" -qlanglvl=ansi -std1 -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__"
+do
+  CC="$ac_save_CC $ac_arg"
+  rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_prog_cc_stdc=$ac_arg
+break
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+fi
+rm -f conftest.err conftest.$ac_objext
+done
+rm -f conftest.$ac_ext conftest.$ac_objext
+CC=$ac_save_CC
+
+fi
+
+case "x$ac_cv_prog_cc_stdc" in
+  x|xno)
+    echo "$as_me:$LINENO: result: none needed" >&5
+echo "${ECHO_T}none needed" >&6 ;;
+  *)
+    echo "$as_me:$LINENO: result: $ac_cv_prog_cc_stdc" >&5
+echo "${ECHO_T}$ac_cv_prog_cc_stdc" >&6
+    CC="$CC $ac_cv_prog_cc_stdc" ;;
+esac
+
+# Some people use a C++ compiler to compile C.  Since we use `exit',
+# in C++ we need to declare it.  In case someone uses the same compiler
+# for both compiling C and C++ we need to have the C++ compiler decide
+# the declaration of exit, since it's the most demanding environment.
+cat >conftest.$ac_ext <<_ACEOF
+#ifndef __cplusplus
+  choke me
+#endif
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  for ac_declaration in \
+   '' \
+   'extern "C" void std::exit (int) throw (); using std::exit;' \
+   'extern "C" void std::exit (int); using std::exit;' \
+   'extern "C" void exit (int) throw ();' \
+   'extern "C" void exit (int);' \
+   'void exit (int);'
+do
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_declaration
+#include <stdlib.h>
+int
+main ()
+{
+exit (42);
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  :
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+continue
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+$ac_declaration
+int
+main ()
+{
+exit (42);
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  break
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+done
+rm -f conftest*
+if test -n "$ac_declaration"; then
+  echo '#ifdef __cplusplus' >>confdefs.h
+  echo $ac_declaration      >>confdefs.h
+  echo '#endif'             >>confdefs.h
+fi
+
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+ac_ext=c
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_c_compiler_gnu
+
+ac_ext=cc
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+
+
+ac_aux_dir=
+for ac_dir in $srcdir $srcdir/.. $srcdir/../..; do
+  if test -f $ac_dir/install-sh; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/install-sh -c"
+    break
+  elif test -f $ac_dir/install.sh; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/install.sh -c"
+    break
+  elif test -f $ac_dir/shtool; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/shtool install -c"
+    break
+  fi
+done
+if test -z "$ac_aux_dir"; then
+  { { echo "$as_me:$LINENO: error: cannot find install-sh or install.sh in $srcdir $srcdir/.. $srcdir/../.." >&5
+echo "$as_me: error: cannot find install-sh or install.sh in $srcdir $srcdir/.. $srcdir/../.." >&2;}
+   { (exit 1); exit 1; }; }
+fi
+ac_config_guess="$SHELL $ac_aux_dir/config.guess"
+ac_config_sub="$SHELL $ac_aux_dir/config.sub"
+ac_configure="$SHELL $ac_aux_dir/configure" # This should be Cygnus configure.
+
+# Find a good install program.  We prefer a C program (faster),
+# so one script is as good as another.  But avoid the broken or
+# incompatible versions:
+# SysV /etc/install, /usr/sbin/install
+# SunOS /usr/etc/install
+# IRIX /sbin/install
+# AIX /bin/install
+# AmigaOS /C/install, which installs bootblocks on floppy discs
+# AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag
+# AFS /usr/afsws/bin/install, which mishandles nonexistent args
+# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
+# OS/2's system install, which has a completely different semantic
+# ./install, which can be erroneously created by make from ./install.sh.
+echo "$as_me:$LINENO: checking for a BSD-compatible install" >&5
+echo $ECHO_N "checking for a BSD-compatible install... $ECHO_C" >&6
+if test -z "$INSTALL"; then
+if test "${ac_cv_path_install+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  # Account for people who put trailing slashes in PATH elements.
+case $as_dir/ in
+  ./ | .// | /cC/* | \
+  /etc/* | /usr/sbin/* | /usr/etc/* | /sbin/* | /usr/afsws/bin/* | \
+  ?:\\/os2\\/install\\/* | ?:\\/OS2\\/INSTALL\\/* | \
+  /usr/ucb/* ) ;;
+  *)
+    # OSF1 and SCO ODT 3.0 have their own names for install.
+    # Don't use installbsd from OSF since it installs stuff as root
+    # by default.
+    for ac_prog in ginstall scoinst install; do
+      for ac_exec_ext in '' $ac_executable_extensions; do
+	if $as_executable_p "$as_dir/$ac_prog$ac_exec_ext"; then
+	  if test $ac_prog = install &&
+	    grep dspmsg "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+	    # AIX install.  It has an incompatible calling convention.
+	    :
+	  elif test $ac_prog = install &&
+	    grep pwplus "$as_dir/$ac_prog$ac_exec_ext" >/dev/null 2>&1; then
+	    # program-specific install script used by HP pwplus--don't use.
+	    :
+	  else
+	    ac_cv_path_install="$as_dir/$ac_prog$ac_exec_ext -c"
+	    break 3
+	  fi
+	fi
+      done
+    done
+    ;;
+esac
+done
+
+
+fi
+  if test "${ac_cv_path_install+set}" = set; then
+    INSTALL=$ac_cv_path_install
+  else
+    # As a last resort, use the slow shell script.  We don't cache a
+    # path for INSTALL within a source directory, because that will
+    # break other packages using the cache if that directory is
+    # removed, or if the path is relative.
+    INSTALL=$ac_install_sh
+  fi
+fi
+echo "$as_me:$LINENO: result: $INSTALL" >&5
+echo "${ECHO_T}$INSTALL" >&6
+
+# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
+# It thinks the first close brace ends the variable substitution.
+test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
+
+test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL}'
+
+test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
+
+
+
+
+ac_ext=cc
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+echo "$as_me:$LINENO: checking how to run the C++ preprocessor" >&5
+echo $ECHO_N "checking how to run the C++ preprocessor... $ECHO_C" >&6
+if test -z "$CXXCPP"; then
+  if test "${ac_cv_prog_CXXCPP+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+      # Double quotes because CXXCPP needs to be expanded
+    for CXXCPP in "$CXX -E" "/lib/cpp"
+    do
+      ac_preproc_ok=false
+for ac_cxx_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+  # <limits.h> exists even on freestanding compilers.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+		     Syntax error
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_cxx_preproc_warn_flag
+    ac_cpp_err=$ac_cpp_err$ac_cxx_werror_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  :
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether non-existent headers
+  # can be detected and how.
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_cxx_preproc_warn_flag
+    ac_cpp_err=$ac_cpp_err$ac_cxx_werror_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  # Broken: success on invalid input.
+continue
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.err conftest.$ac_ext
+if $ac_preproc_ok; then
+  break
+fi
+
+    done
+    ac_cv_prog_CXXCPP=$CXXCPP
+
+fi
+  CXXCPP=$ac_cv_prog_CXXCPP
+else
+  ac_cv_prog_CXXCPP=$CXXCPP
+fi
+echo "$as_me:$LINENO: result: $CXXCPP" >&5
+echo "${ECHO_T}$CXXCPP" >&6
+ac_preproc_ok=false
+for ac_cxx_preproc_warn_flag in '' yes
+do
+  # Use a header file that comes with gcc, so configuring glibc
+  # with a fresh cross-compiler works.
+  # Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+  # <limits.h> exists even on freestanding compilers.
+  # On the NeXT, cc -E runs the code through the compiler's parser,
+  # not just through cpp. "Syntax error" is here to catch this case.
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+		     Syntax error
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_cxx_preproc_warn_flag
+    ac_cpp_err=$ac_cpp_err$ac_cxx_werror_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  :
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  # Broken: fails on valid input.
+continue
+fi
+rm -f conftest.err conftest.$ac_ext
+
+  # OK, works on sane cases.  Now check whether non-existent headers
+  # can be detected and how.
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <ac_nonexistent.h>
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_cxx_preproc_warn_flag
+    ac_cpp_err=$ac_cpp_err$ac_cxx_werror_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  # Broken: success on invalid input.
+continue
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  # Passes both tests.
+ac_preproc_ok=:
+break
+fi
+rm -f conftest.err conftest.$ac_ext
+
+done
+# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+rm -f conftest.err conftest.$ac_ext
+if $ac_preproc_ok; then
+  :
+else
+  { { echo "$as_me:$LINENO: error: C++ preprocessor \"$CXXCPP\" fails sanity check
+See \`config.log' for more details." >&5
+echo "$as_me: error: C++ preprocessor \"$CXXCPP\" fails sanity check
+See \`config.log' for more details." >&2;}
+   { (exit 1); exit 1; }; }
+fi
+
+ac_ext=cc
+ac_cpp='$CXXCPP $CPPFLAGS'
+ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
+ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
+ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
+
+
+echo "$as_me:$LINENO: checking for X" >&5
+echo $ECHO_N "checking for X... $ECHO_C" >&6
+
+
+# Check whether --with-x or --without-x was given.
+if test "${with_x+set}" = set; then
+  withval="$with_x"
+
+fi;
+# $have_x is `yes', `no', `disabled', or empty when we do not yet know.
+if test "x$with_x" = xno; then
+  # The user explicitly disabled X.
+  have_x=disabled
+else
+  if test "x$x_includes" != xNONE && test "x$x_libraries" != xNONE; then
+    # Both variables are already set.
+    have_x=yes
+  else
+    if test "${ac_cv_have_x+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  # One or both of the vars are not set, and there is no cached value.
+ac_x_includes=no ac_x_libraries=no
+rm -fr conftest.dir
+if mkdir conftest.dir; then
+  cd conftest.dir
+  # Make sure to not put "make" in the Imakefile rules, since we grep it out.
+  cat >Imakefile <<'_ACEOF'
+acfindx:
+	@echo 'ac_im_incroot="${INCROOT}"; ac_im_usrlibdir="${USRLIBDIR}"; ac_im_libdir="${LIBDIR}"'
+_ACEOF
+  if (xmkmf) >/dev/null 2>/dev/null && test -f Makefile; then
+    # GNU make sometimes prints "make[1]: Entering...", which would confuse us.
+    eval `${MAKE-make} acfindx 2>/dev/null | grep -v make`
+    # Open Windows xmkmf reportedly sets LIBDIR instead of USRLIBDIR.
+    for ac_extension in a so sl; do
+      if test ! -f $ac_im_usrlibdir/libX11.$ac_extension &&
+	 test -f $ac_im_libdir/libX11.$ac_extension; then
+	ac_im_usrlibdir=$ac_im_libdir; break
+      fi
+    done
+    # Screen out bogus values from the imake configuration.  They are
+    # bogus both because they are the default anyway, and because
+    # using them would break gcc on systems where it needs fixed includes.
+    case $ac_im_incroot in
+	/usr/include) ;;
+	*) test -f "$ac_im_incroot/X11/Xos.h" && ac_x_includes=$ac_im_incroot;;
+    esac
+    case $ac_im_usrlibdir in
+	/usr/lib | /lib) ;;
+	*) test -d "$ac_im_usrlibdir" && ac_x_libraries=$ac_im_usrlibdir ;;
+    esac
+  fi
+  cd ..
+  rm -fr conftest.dir
+fi
+
+# Standard set of common directories for X headers.
+# Check X11 before X11Rn because it is often a symlink to the current release.
+ac_x_header_dirs='
+/usr/X11/include
+/usr/X11R6/include
+/usr/X11R5/include
+/usr/X11R4/include
+
+/usr/include/X11
+/usr/include/X11R6
+/usr/include/X11R5
+/usr/include/X11R4
+
+/usr/local/X11/include
+/usr/local/X11R6/include
+/usr/local/X11R5/include
+/usr/local/X11R4/include
+
+/usr/local/include/X11
+/usr/local/include/X11R6
+/usr/local/include/X11R5
+/usr/local/include/X11R4
+
+/usr/X386/include
+/usr/x386/include
+/usr/XFree86/include/X11
+
+/usr/include
+/usr/local/include
+/usr/unsupported/include
+/usr/athena/include
+/usr/local/x11r5/include
+/usr/lpp/Xamples/include
+
+/usr/openwin/include
+/usr/openwin/share/include'
+
+if test "$ac_x_includes" = no; then
+  # Guess where to find include files, by looking for Intrinsic.h.
+  # First, try using that file with no special directory specified.
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <X11/Intrinsic.h>
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_cxx_preproc_warn_flag
+    ac_cpp_err=$ac_cpp_err$ac_cxx_werror_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  # We can compile using X headers with no special include directory.
+ac_x_includes=
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+  for ac_dir in $ac_x_header_dirs; do
+  if test -r "$ac_dir/X11/Intrinsic.h"; then
+    ac_x_includes=$ac_dir
+    break
+  fi
+done
+fi
+rm -f conftest.err conftest.$ac_ext
+fi # $ac_x_includes = no
+
+if test "$ac_x_libraries" = no; then
+  # Check for the libraries.
+  # See if we find them without any special options.
+  # Don't add to $LIBS permanently.
+  ac_save_LIBS=$LIBS
+  LIBS="-lXt $LIBS"
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <X11/Intrinsic.h>
+int
+main ()
+{
+XtMalloc (0)
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  LIBS=$ac_save_LIBS
+# We can link X programs with no special library path.
+ac_x_libraries=
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+LIBS=$ac_save_LIBS
+for ac_dir in `echo "$ac_x_includes $ac_x_header_dirs" | sed s/include/lib/g`
+do
+  # Don't even attempt the hair of trying to link an X program!
+  for ac_extension in a so sl; do
+    if test -r $ac_dir/libXt.$ac_extension; then
+      ac_x_libraries=$ac_dir
+      break 2
+    fi
+  done
+done
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+fi # $ac_x_libraries = no
+
+if test "$ac_x_includes" = no || test "$ac_x_libraries" = no; then
+  # Didn't find X anywhere.  Cache the known absence of X.
+  ac_cv_have_x="have_x=no"
+else
+  # Record where we found X for the cache.
+  ac_cv_have_x="have_x=yes \
+		ac_x_includes=$ac_x_includes ac_x_libraries=$ac_x_libraries"
+fi
+fi
+
+  fi
+  eval "$ac_cv_have_x"
+fi # $with_x != no
+
+if test "$have_x" != yes; then
+  echo "$as_me:$LINENO: result: $have_x" >&5
+echo "${ECHO_T}$have_x" >&6
+  no_x=yes
+else
+  # If each of the values was on the command line, it overrides each guess.
+  test "x$x_includes" = xNONE && x_includes=$ac_x_includes
+  test "x$x_libraries" = xNONE && x_libraries=$ac_x_libraries
+  # Update the cache value to reflect the command line values.
+  ac_cv_have_x="have_x=yes \
+		ac_x_includes=$x_includes ac_x_libraries=$x_libraries"
+  echo "$as_me:$LINENO: result: libraries $x_libraries, headers $x_includes" >&5
+echo "${ECHO_T}libraries $x_libraries, headers $x_includes" >&6
+fi
+
+if test "$no_x" = yes; then
+  # Not all programs may use this symbol, but it does not hurt to define it.
+
+cat >>confdefs.h <<\_ACEOF
+#define X_DISPLAY_MISSING 1
+_ACEOF
+
+  X_CFLAGS= X_PRE_LIBS= X_LIBS= X_EXTRA_LIBS=
+else
+  if test -n "$x_includes"; then
+    X_CFLAGS="$X_CFLAGS -I$x_includes"
+  fi
+
+  # It would also be nice to do this for all -L options, not just this one.
+  if test -n "$x_libraries"; then
+    X_LIBS="$X_LIBS -L$x_libraries"
+    # For Solaris; some versions of Sun CC require a space after -R and
+    # others require no space.  Words are not sufficient . . . .
+    case `(uname -sr) 2>/dev/null` in
+    "SunOS 5"*)
+      echo "$as_me:$LINENO: checking whether -R must be followed by a space" >&5
+echo $ECHO_N "checking whether -R must be followed by a space... $ECHO_C" >&6
+      ac_xsave_LIBS=$LIBS; LIBS="$LIBS -R$x_libraries"
+      cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_R_nospace=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_R_nospace=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+      if test $ac_R_nospace = yes; then
+	echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+	X_LIBS="$X_LIBS -R$x_libraries"
+      else
+	LIBS="$ac_xsave_LIBS -R $x_libraries"
+	cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_R_space=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_R_space=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+	if test $ac_R_space = yes; then
+	  echo "$as_me:$LINENO: result: yes" >&5
+echo "${ECHO_T}yes" >&6
+	  X_LIBS="$X_LIBS -R $x_libraries"
+	else
+	  echo "$as_me:$LINENO: result: neither works" >&5
+echo "${ECHO_T}neither works" >&6
+	fi
+      fi
+      LIBS=$ac_xsave_LIBS
+    esac
+  fi
+
+  # Check for system-dependent libraries X programs must link with.
+  # Do this before checking for the system-independent R6 libraries
+  # (-lICE), since we may need -lsocket or whatever for X linking.
+
+  if test "$ISC" = yes; then
+    X_EXTRA_LIBS="$X_EXTRA_LIBS -lnsl_s -linet"
+  else
+    # Martyn Johnson says this is needed for Ultrix, if the X
+    # libraries were built with DECnet support.  And Karl Berry says
+    # the Alpha needs dnet_stub (dnet does not exist).
+    ac_xsave_LIBS="$LIBS"; LIBS="$LIBS $X_LIBS -lX11"
+    cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char XOpenDisplay ();
+int
+main ()
+{
+XOpenDisplay ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  :
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+echo "$as_me:$LINENO: checking for dnet_ntoa in -ldnet" >&5
+echo $ECHO_N "checking for dnet_ntoa in -ldnet... $ECHO_C" >&6
+if test "${ac_cv_lib_dnet_dnet_ntoa+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldnet  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char dnet_ntoa ();
+int
+main ()
+{
+dnet_ntoa ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_dnet_dnet_ntoa=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_dnet_dnet_ntoa=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_dnet_dnet_ntoa" >&5
+echo "${ECHO_T}$ac_cv_lib_dnet_dnet_ntoa" >&6
+if test $ac_cv_lib_dnet_dnet_ntoa = yes; then
+  X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet"
+fi
+
+    if test $ac_cv_lib_dnet_dnet_ntoa = no; then
+      echo "$as_me:$LINENO: checking for dnet_ntoa in -ldnet_stub" >&5
+echo $ECHO_N "checking for dnet_ntoa in -ldnet_stub... $ECHO_C" >&6
+if test "${ac_cv_lib_dnet_stub_dnet_ntoa+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-ldnet_stub  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char dnet_ntoa ();
+int
+main ()
+{
+dnet_ntoa ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_dnet_stub_dnet_ntoa=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_dnet_stub_dnet_ntoa=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_dnet_stub_dnet_ntoa" >&5
+echo "${ECHO_T}$ac_cv_lib_dnet_stub_dnet_ntoa" >&6
+if test $ac_cv_lib_dnet_stub_dnet_ntoa = yes; then
+  X_EXTRA_LIBS="$X_EXTRA_LIBS -ldnet_stub"
+fi
+
+    fi
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+    LIBS="$ac_xsave_LIBS"
+
+    # msh@cis.ufl.edu says -lnsl (and -lsocket) are needed for his 386/AT,
+    # to get the SysV transport functions.
+    # Chad R. Larson says the Pyramis MIS-ES running DC/OSx (SVR4)
+    # needs -lnsl.
+    # The nsl library prevents programs from opening the X display
+    # on Irix 5.2, according to T.E. Dickey.
+    # The functions gethostbyname, getservbyname, and inet_addr are
+    # in -lbsd on LynxOS 3.0.1/i386, according to Lars Hecking.
+    echo "$as_me:$LINENO: checking for gethostbyname" >&5
+echo $ECHO_N "checking for gethostbyname... $ECHO_C" >&6
+if test "${ac_cv_func_gethostbyname+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+/* Define gethostbyname to an innocuous variant, in case <limits.h> declares gethostbyname.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define gethostbyname innocuous_gethostbyname
+
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char gethostbyname (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
+
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+
+#undef gethostbyname
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char gethostbyname ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_gethostbyname) || defined (__stub___gethostbyname)
+choke me
+#else
+char (*f) () = gethostbyname;
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+int
+main ()
+{
+return f != gethostbyname;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_func_gethostbyname=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_func_gethostbyname=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_func_gethostbyname" >&5
+echo "${ECHO_T}$ac_cv_func_gethostbyname" >&6
+
+    if test $ac_cv_func_gethostbyname = no; then
+      echo "$as_me:$LINENO: checking for gethostbyname in -lnsl" >&5
+echo $ECHO_N "checking for gethostbyname in -lnsl... $ECHO_C" >&6
+if test "${ac_cv_lib_nsl_gethostbyname+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lnsl  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char gethostbyname ();
+int
+main ()
+{
+gethostbyname ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_nsl_gethostbyname=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_nsl_gethostbyname=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_nsl_gethostbyname" >&5
+echo "${ECHO_T}$ac_cv_lib_nsl_gethostbyname" >&6
+if test $ac_cv_lib_nsl_gethostbyname = yes; then
+  X_EXTRA_LIBS="$X_EXTRA_LIBS -lnsl"
+fi
+
+      if test $ac_cv_lib_nsl_gethostbyname = no; then
+	echo "$as_me:$LINENO: checking for gethostbyname in -lbsd" >&5
+echo $ECHO_N "checking for gethostbyname in -lbsd... $ECHO_C" >&6
+if test "${ac_cv_lib_bsd_gethostbyname+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lbsd  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char gethostbyname ();
+int
+main ()
+{
+gethostbyname ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_bsd_gethostbyname=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_bsd_gethostbyname=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_bsd_gethostbyname" >&5
+echo "${ECHO_T}$ac_cv_lib_bsd_gethostbyname" >&6
+if test $ac_cv_lib_bsd_gethostbyname = yes; then
+  X_EXTRA_LIBS="$X_EXTRA_LIBS -lbsd"
+fi
+
+      fi
+    fi
+
+    # lieder@skyler.mavd.honeywell.com says without -lsocket,
+    # socket/setsockopt and other routines are undefined under SCO ODT
+    # 2.0.  But -lsocket is broken on IRIX 5.2 (and is not necessary
+    # on later versions), says Simon Leinen: it contains gethostby*
+    # variants that don't use the name server (or something).  -lsocket
+    # must be given before -lnsl if both are needed.  We assume that
+    # if connect needs -lnsl, so does gethostbyname.
+    echo "$as_me:$LINENO: checking for connect" >&5
+echo $ECHO_N "checking for connect... $ECHO_C" >&6
+if test "${ac_cv_func_connect+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+/* Define connect to an innocuous variant, in case <limits.h> declares connect.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define connect innocuous_connect
+
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char connect (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
+
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+
+#undef connect
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char connect ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_connect) || defined (__stub___connect)
+choke me
+#else
+char (*f) () = connect;
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+int
+main ()
+{
+return f != connect;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_func_connect=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_func_connect=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_func_connect" >&5
+echo "${ECHO_T}$ac_cv_func_connect" >&6
+
+    if test $ac_cv_func_connect = no; then
+      echo "$as_me:$LINENO: checking for connect in -lsocket" >&5
+echo $ECHO_N "checking for connect in -lsocket... $ECHO_C" >&6
+if test "${ac_cv_lib_socket_connect+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lsocket $X_EXTRA_LIBS $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char connect ();
+int
+main ()
+{
+connect ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_socket_connect=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_socket_connect=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_socket_connect" >&5
+echo "${ECHO_T}$ac_cv_lib_socket_connect" >&6
+if test $ac_cv_lib_socket_connect = yes; then
+  X_EXTRA_LIBS="-lsocket $X_EXTRA_LIBS"
+fi
+
+    fi
+
+    # Guillermo Gomez says -lposix is necessary on A/UX.
+    echo "$as_me:$LINENO: checking for remove" >&5
+echo $ECHO_N "checking for remove... $ECHO_C" >&6
+if test "${ac_cv_func_remove+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+/* Define remove to an innocuous variant, in case <limits.h> declares remove.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define remove innocuous_remove
+
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char remove (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
+
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+
+#undef remove
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char remove ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_remove) || defined (__stub___remove)
+choke me
+#else
+char (*f) () = remove;
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+int
+main ()
+{
+return f != remove;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_func_remove=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_func_remove=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_func_remove" >&5
+echo "${ECHO_T}$ac_cv_func_remove" >&6
+
+    if test $ac_cv_func_remove = no; then
+      echo "$as_me:$LINENO: checking for remove in -lposix" >&5
+echo $ECHO_N "checking for remove in -lposix... $ECHO_C" >&6
+if test "${ac_cv_lib_posix_remove+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lposix  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char remove ();
+int
+main ()
+{
+remove ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_posix_remove=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_posix_remove=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_posix_remove" >&5
+echo "${ECHO_T}$ac_cv_lib_posix_remove" >&6
+if test $ac_cv_lib_posix_remove = yes; then
+  X_EXTRA_LIBS="$X_EXTRA_LIBS -lposix"
+fi
+
+    fi
+
+    # BSDI BSD/OS 2.1 needs -lipc for XOpenDisplay.
+    echo "$as_me:$LINENO: checking for shmat" >&5
+echo $ECHO_N "checking for shmat... $ECHO_C" >&6
+if test "${ac_cv_func_shmat+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+/* Define shmat to an innocuous variant, in case <limits.h> declares shmat.
+   For example, HP-UX 11i <limits.h> declares gettimeofday.  */
+#define shmat innocuous_shmat
+
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char shmat (); below.
+    Prefer <limits.h> to <assert.h> if __STDC__ is defined, since
+    <limits.h> exists even on freestanding compilers.  */
+
+#ifdef __STDC__
+# include <limits.h>
+#else
+# include <assert.h>
+#endif
+
+#undef shmat
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char shmat ();
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_shmat) || defined (__stub___shmat)
+choke me
+#else
+char (*f) () = shmat;
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+int
+main ()
+{
+return f != shmat;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_func_shmat=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_func_shmat=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+fi
+echo "$as_me:$LINENO: result: $ac_cv_func_shmat" >&5
+echo "${ECHO_T}$ac_cv_func_shmat" >&6
+
+    if test $ac_cv_func_shmat = no; then
+      echo "$as_me:$LINENO: checking for shmat in -lipc" >&5
+echo $ECHO_N "checking for shmat in -lipc... $ECHO_C" >&6
+if test "${ac_cv_lib_ipc_shmat+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lipc  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char shmat ();
+int
+main ()
+{
+shmat ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_ipc_shmat=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_ipc_shmat=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_ipc_shmat" >&5
+echo "${ECHO_T}$ac_cv_lib_ipc_shmat" >&6
+if test $ac_cv_lib_ipc_shmat = yes; then
+  X_EXTRA_LIBS="$X_EXTRA_LIBS -lipc"
+fi
+
+    fi
+  fi
+
+  # Check for libraries that X11R6 Xt/Xaw programs need.
+  ac_save_LDFLAGS=$LDFLAGS
+  test -n "$x_libraries" && LDFLAGS="$LDFLAGS -L$x_libraries"
+  # SM needs ICE to (dynamically) link under SunOS 4.x (so we have to
+  # check for ICE first), but we must link in the order -lSM -lICE or
+  # we get undefined symbols.  So assume we have SM if we have ICE.
+  # These have to be linked with before -lX11, unlike the other
+  # libraries we check for below, so use a different variable.
+  # John Interrante, Karl Berry
+  echo "$as_me:$LINENO: checking for IceConnectionNumber in -lICE" >&5
+echo $ECHO_N "checking for IceConnectionNumber in -lICE... $ECHO_C" >&6
+if test "${ac_cv_lib_ICE_IceConnectionNumber+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lICE $X_EXTRA_LIBS $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char IceConnectionNumber ();
+int
+main ()
+{
+IceConnectionNumber ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_ICE_IceConnectionNumber=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ac_cv_lib_ICE_IceConnectionNumber=no
+fi
+rm -f conftest.err conftest.$ac_objext \
+      conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_ICE_IceConnectionNumber" >&5
+echo "${ECHO_T}$ac_cv_lib_ICE_IceConnectionNumber" >&6
+if test $ac_cv_lib_ICE_IceConnectionNumber = yes; then
+  X_PRE_LIBS="$X_PRE_LIBS -lSM -lICE"
+fi
+
+  LDFLAGS=$ac_save_LDFLAGS
+
+fi
+
+
+ac_help="$ac_help
+  --with-symbols          add the -g flag to produce the debug symbols
+  --with-info             enable basic log output to trace the program
+  --with-valgrind         clean up allocated buffers to avoid valgrind warnings
+  --with-version          use this version for produced libraries
+
+  --with-static-png       enable static linking of PNG library
+  --with-static-jpeg      enable static linking of JPEG library"
+
+
+
+
+
+echo "$as_me:$LINENO: checking for Cygwin32 environment" >&5
+echo $ECHO_N "checking for Cygwin32 environment... $ECHO_C" >&6
+if test "${nxproxy_cv_cygwin32+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+return __CYGWIN32__;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  nxproxy_cv_cygwin32=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+nxproxy_cv_cygwin32=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f conftest*
+fi
+echo "$as_me:$LINENO: result: $nxproxy_cv_cygwin32" >&5
+echo "${ECHO_T}$nxproxy_cv_cygwin32" >&6
+CYGWIN32=
+test "$nxproxy_cv_cygwin32" = yes && CYGWIN32=yes
+if test "$CYGWIN32" = yes; then
+    LIBS="$LIBS -mwindows -lstdc++"
+fi
+
+
+
+echo "$as_me:$LINENO: checking for Amd64 environment" >&5
+echo $ECHO_N "checking for Amd64 environment... $ECHO_C" >&6
+if test "${nxconf_cv_amd64+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+return (__amd64__ || __x86_64__);
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  nxconf_cv_amd64=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+nxconf_cv_amd64=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f conftest*
+fi
+echo "$as_me:$LINENO: result: $nxconf_cv_amd64" >&5
+echo "${ECHO_T}$nxconf_cv_amd64" >&6
+AMD64=
+test "$nxconf_cv_amd64" = yes && AMD64=yes
+
+
+
+echo "$as_me:$LINENO: checking for SunOS environment" >&5
+echo $ECHO_N "checking for SunOS environment... $ECHO_C" >&6
+if test "${nxconf_cv_sun+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+return __sun;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  nxconf_cv_sun=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+nxconf_cv_sun=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f conftest*
+fi
+echo "$as_me:$LINENO: result: $nxconf_cv_sun" >&5
+echo "${ECHO_T}$nxconf_cv_sun" >&6
+SUN=
+test "$nxconf_cv_sun" = yes && SUN=yes
+
+if test "$SUN" = yes; then
+  CFLAGS="$CFLAGS -I/usr/sfw/include"
+fi
+
+if test "$SUN" = yes; then
+  LDFLAGS="$LDFLAGS -G -h \$(LIBLOAD) -L/usr/sfw/lib"
+else
+  LDFLAGS="$LDFLAGS -shared -Wl,-soname,\$(LIBLOAD)"
+fi
+
+
+
+echo "$as_me:$LINENO: checking for FreeBSD environment" >&5
+echo $ECHO_N "checking for FreeBSD environment... $ECHO_C" >&6
+if test "${nxconf_cv_freebsd+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+
+int
+main ()
+{
+return __FreeBSD__;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_cxx_werror_flag"
+			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  nxconf_cv_freebsd=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+nxconf_cv_freebsd=no
+fi
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+rm -f conftest*
+fi
+echo "$as_me:$LINENO: result: $nxconf_cv_freebsd" >&5
+echo "${ECHO_T}$nxconf_cv_freebsd" >&6
+FreeBSD=
+test "$nxconf_cv_freebsd" = yes && FreeBSD=yes
+
+
+if test "$CYGWIN32" != yes -a "$DARWIN" != yes; then
+  CXXFLAGS="$CXXFLAGS -fPIC"
+  CFLAGS="$CFLAGS -fPIC"
+fi
+
+
+if test "$FreeBSD" = yes; then
+  LIBS="$LIBS  -L/usr/local/lib"
+  CXXFLAGS="$CXXFLAGS -I/usr/local/include"
+  CFLAGS="$CFLAGS -I/usr/local/include"
+fi
+
+
+if test "${with_static_png}" = yes; then
+  echo -e "enabling static linking of PNG library"
+  if test "$CYGWIN32" = yes; then
+    LIBS="$LIBSTATIC -static -lpng"
+  else
+    if test -f "/usr/lib/libpng.a" ; then
+      LIBS="/usr/lib/libpng.a $LIBS"
+    else
+      if test -f "/usr/local/lib/libpng.a" ; then
+        echo -e "assuming libpng.a in /usr/local/lib"
+        LIBS="/usr/local/lib/libpng.a $LIBS"
+      else
+        echo -e "assuming libpng.a in default linker path"
+        LIBS="libpng.a $LIBS"
+      fi
+    fi
+  fi
+else
+  echo -e "enabling dynamic linking of PNG library"
+  LIBS="-lpng $LIBS"
+fi
+
+if test "${with_static_jpeg}" = yes; then
+  echo -e "enabling static linking of JPEG library"
+  if test "$CYGWIN32" = yes; then
+    LIBSTATIC="$LIBS -static -ljpeg"
+  else
+    if test -f "/usr/lib/libjpeg.a" ; then
+      LIBS="/usr/lib/libjpeg.a $LIBS"
+    else
+      if test -f "/usr/local/lib/libjpeg.a" ; then
+        echo -e "assuming libjpeg.a in /usr/local/lib"
+        LIBS="/usr/local/lib/libjpeg.a $LIBS"
+      else
+        echo -e "assuming libjpeg.a in default linker path"
+        LIBS="libjpeg.a $LIBS"
+      fi
+    fi
+  fi
+else
+  echo -e "enabling dynamic linking of JPEG library"
+  LIBS="-ljpeg $LIBS"
+fi
+
+if test "${with_symbols}" = yes; then
+  echo -e "enabling production of debug symbols"
+  CXXFLAGS="-g $CXXFLAGS"
+  CFLAGS="-g $CFLAGS"
+else
+  echo -e "disabling production of debug symbols"
+fi
+
+if test "${with_info}" = yes; then
+  echo -e "enabling info output in the log file"
+  CXXFLAGS="$CXXFLAGS -DINFO"
+  CFLAGS="$CFLAGS -DINFO"
+else
+  echo -e "disabling info output in the log file"
+fi
+
+if test "${with_valgrind}" = yes; then
+  echo -e "enabling valgrind memory checker workarounds"
+  CXXFLAGS="$CXXFLAGS -DVALGRIND"
+  CFLAGS="$CFLAGS -DVALGRIND"
+else
+  echo -e "disabling valgrind memory checker workarounds"
+fi
+
+
+
+if test "${with_version}" = yes; then
+  VERSION=${ac_option}
+else
+  VERSION=`cat VERSION`
+fi
+echo -e "compiling version ${VERSION}"
+
+LIBVERSION=`echo ${VERSION} | cut -d '.' -f 1`
+
+CXXFLAGS="$CXXFLAGS -DVERSION=\\\"${VERSION}\\\""
+CFLAGS="$CFLAGS -DVERSION=\\\"${VERSION}\\\""
+
+
+
+
+if test -x "../nx-X11/config/makedepend/makedepend" ; then
+  MAKEDEPEND=../nx-X11/config/makedepend/makedepend
+else
+  if test -x "/usr/X11R6/bin/makedepend" ; then
+    MAKEDEPEND=/usr/X11R6/bin/makedepend
+  else
+    if test -x "/usr/openwin/bin/makedepend" ; then
+      MAKEDEPEND=/usr/openwin/bin/makedepend
+    else
+      MAKEDEPEND=/usr/bin/makedepend
+    fi
+  fi
+fi
+
+
+
+
+if test "$CYGWIN32" = yes; then
+    ALL="\$(LIBCYGARCHIVE) \$(LIBCYGSHARED) \$(LIBARCHIVE)"
+else
+    ALL="\$(LIBFULL) \$(LIBLOAD) \$(LIBSHARED) \$(LIBARCHIVE)"
+fi
+
+          ac_config_files="$ac_config_files Makefile"
+cat >confcache <<\_ACEOF
+# This file is a shell script that caches the results of configure
+# tests run on this system so they can be shared between configure
+# scripts and configure runs, see configure's option --config-cache.
+# It is not useful on other systems.  If it contains results you don't
+# want to keep, you may remove or edit it.
+#
+# config.status only pays attention to the cache file if you give it
+# the --recheck option to rerun configure.
+#
+# `ac_cv_env_foo' variables (set or unset) will be overridden when
+# loading this file, other *unset* `ac_cv_foo' will be assigned the
+# following values.
+
+_ACEOF
+
+# The following way of writing the cache mishandles newlines in values,
+# but we know of no workaround that is simple, portable, and efficient.
+# So, don't put newlines in cache variables' values.
+# Ultrix sh set writes to stderr and can't be redirected directly,
+# and sets the high bit in the cache file unless we assign to the vars.
+{
+  (set) 2>&1 |
+    case `(ac_space=' '; set | grep ac_space) 2>&1` in
+    *ac_space=\ *)
+      # `set' does not quote correctly, so add quotes (double-quote
+      # substitution turns \\\\ into \\, and sed turns \\ into \).
+      sed -n \
+	"s/'/'\\\\''/g;
+	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
+      ;;
+    *)
+      # `set' quotes correctly as required by POSIX, so do not add quotes.
+      sed -n \
+	"s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1=\\2/p"
+      ;;
+    esac;
+} |
+  sed '
+     t clear
+     : clear
+     s/^\([^=]*\)=\(.*[{}].*\)$/test "${\1+set}" = set || &/
+     t end
+     /^ac_cv_env/!s/^\([^=]*\)=\(.*\)$/\1=${\1=\2}/
+     : end' >>confcache
+if diff $cache_file confcache >/dev/null 2>&1; then :; else
+  if test -w $cache_file; then
+    test "x$cache_file" != "x/dev/null" && echo "updating cache $cache_file"
+    cat confcache >$cache_file
+  else
+    echo "not updating unwritable cache $cache_file"
+  fi
+fi
+rm -f confcache
+
+test "x$prefix" = xNONE && prefix=$ac_default_prefix
+# Let make expand exec_prefix.
+test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
+
+# VPATH may cause trouble with some makes, so we remove $(srcdir),
+# ${srcdir} and @srcdir@ from VPATH if srcdir is ".", strip leading and
+# trailing colons and then remove the whole line if VPATH becomes empty
+# (actually we leave an empty line to preserve line numbers).
+if test "x$srcdir" = x.; then
+  ac_vpsub='/^[	 ]*VPATH[	 ]*=/{
+s/:*\$(srcdir):*/:/;
+s/:*\${srcdir}:*/:/;
+s/:*@srcdir@:*/:/;
+s/^\([^=]*=[	 ]*\):*/\1/;
+s/:*$//;
+s/^[^=]*=[	 ]*$//;
+}'
+fi
+
+# Transform confdefs.h into DEFS.
+# Protect against shell expansion while executing Makefile rules.
+# Protect against Makefile macro expansion.
+#
+# If the first sed substitution is executed (which looks for macros that
+# take arguments), then we branch to the quote section.  Otherwise,
+# look for a macro that doesn't take arguments.
+cat >confdef2opt.sed <<\_ACEOF
+t clear
+: clear
+s,^[	 ]*#[	 ]*define[	 ][	 ]*\([^	 (][^	 (]*([^)]*)\)[	 ]*\(.*\),-D\1=\2,g
+t quote
+s,^[	 ]*#[	 ]*define[	 ][	 ]*\([^	 ][^	 ]*\)[	 ]*\(.*\),-D\1=\2,g
+t quote
+d
+: quote
+s,[	 `~#$^&*(){}\\|;'"<>?],\\&,g
+s,\[,\\&,g
+s,\],\\&,g
+s,\$,$$,g
+p
+_ACEOF
+# We use echo to avoid assuming a particular line-breaking character.
+# The extra dot is to prevent the shell from consuming trailing
+# line-breaks from the sub-command output.  A line-break within
+# single-quotes doesn't work because, if this script is created in a
+# platform that uses two characters for line-breaks (e.g., DOS), tr
+# would break.
+ac_LF_and_DOT=`echo; echo .`
+DEFS=`sed -n -f confdef2opt.sed confdefs.h | tr "$ac_LF_and_DOT" ' .'`
+rm -f confdef2opt.sed
+
+
+ac_libobjs=
+ac_ltlibobjs=
+for ac_i in : $LIBOBJS; do test "x$ac_i" = x: && continue
+  # 1. Remove the extension, and $U if already installed.
+  ac_i=`echo "$ac_i" |
+	 sed 's/\$U\././;s/\.o$//;s/\.obj$//'`
+  # 2. Add them.
+  ac_libobjs="$ac_libobjs $ac_i\$U.$ac_objext"
+  ac_ltlibobjs="$ac_ltlibobjs $ac_i"'$U.lo'
+done
+LIBOBJS=$ac_libobjs
+
+LTLIBOBJS=$ac_ltlibobjs
+
+
+
+: ${CONFIG_STATUS=./config.status}
+ac_clean_files_save=$ac_clean_files
+ac_clean_files="$ac_clean_files $CONFIG_STATUS"
+{ echo "$as_me:$LINENO: creating $CONFIG_STATUS" >&5
+echo "$as_me: creating $CONFIG_STATUS" >&6;}
+cat >$CONFIG_STATUS <<_ACEOF
+#! $SHELL
+# Generated by $as_me.
+# Run this file to recreate the current configuration.
+# Compiler output produced by configure, useful for debugging
+# configure, is in config.log if it exists.
+
+debug=false
+ac_cs_recheck=false
+ac_cs_silent=false
+SHELL=\${CONFIG_SHELL-$SHELL}
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF
+## --------------------- ##
+## M4sh Initialization.  ##
+## --------------------- ##
+
+# Be Bourne compatible
+if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
+  emulate sh
+  NULLCMD=:
+  # Zsh 3.x and 4.x performs word splitting on ${1+"$@"}, which
+  # is contrary to our usage.  Disable this feature.
+  alias -g '${1+"$@"}'='"$@"'
+elif test -n "${BASH_VERSION+set}" && (set -o posix) >/dev/null 2>&1; then
+  set -o posix
+fi
+DUALCASE=1; export DUALCASE # for MKS sh
+
+# Support unset when possible.
+if ( (MAIL=60; unset MAIL) || exit) >/dev/null 2>&1; then
+  as_unset=unset
+else
+  as_unset=false
+fi
+
+
+# Work around bugs in pre-3.0 UWIN ksh.
+$as_unset ENV MAIL MAILPATH
+PS1='$ '
+PS2='> '
+PS4='+ '
+
+# NLS nuisances.
+for as_var in \
+  LANG LANGUAGE LC_ADDRESS LC_ALL LC_COLLATE LC_CTYPE LC_IDENTIFICATION \
+  LC_MEASUREMENT LC_MESSAGES LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER \
+  LC_TELEPHONE LC_TIME
+do
+  if (set +x; test -z "`(eval $as_var=C; export $as_var) 2>&1`"); then
+    eval $as_var=C; export $as_var
+  else
+    $as_unset $as_var
+  fi
+done
+
+# Required to use basename.
+if expr a : '\(a\)' >/dev/null 2>&1; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+if (basename /) >/dev/null 2>&1 && test "X`basename / 2>&1`" = "X/"; then
+  as_basename=basename
+else
+  as_basename=false
+fi
+
+
+# Name of the executable.
+as_me=`$as_basename "$0" ||
+$as_expr X/"$0" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$0" : 'X\(//\)$' \| \
+	 X"$0" : 'X\(/\)$' \| \
+	 .     : '\(.\)' 2>/dev/null ||
+echo X/"$0" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{ s//\1/; q; }
+  	  /^X\/\(\/\/\)$/{ s//\1/; q; }
+  	  /^X\/\(\/\).*/{ s//\1/; q; }
+  	  s/.*/./; q'`
+
+
+# PATH needs CR, and LINENO needs CR and PATH.
+# Avoid depending upon Character Ranges.
+as_cr_letters='abcdefghijklmnopqrstuvwxyz'
+as_cr_LETTERS='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+as_cr_Letters=$as_cr_letters$as_cr_LETTERS
+as_cr_digits='0123456789'
+as_cr_alnum=$as_cr_Letters$as_cr_digits
+
+# The user is always right.
+if test "${PATH_SEPARATOR+set}" != set; then
+  echo "#! /bin/sh" >conf$$.sh
+  echo  "exit 0"   >>conf$$.sh
+  chmod +x conf$$.sh
+  if (PATH="/nonexistent;."; conf$$.sh) >/dev/null 2>&1; then
+    PATH_SEPARATOR=';'
+  else
+    PATH_SEPARATOR=:
+  fi
+  rm -f conf$$.sh
+fi
+
+
+  as_lineno_1=$LINENO
+  as_lineno_2=$LINENO
+  as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null`
+  test "x$as_lineno_1" != "x$as_lineno_2" &&
+  test "x$as_lineno_3"  = "x$as_lineno_2"  || {
+  # Find who we are.  Look in the path if we contain no path at all
+  # relative or not.
+  case $0 in
+    *[\\/]* ) as_myself=$0 ;;
+    *) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  test -r "$as_dir/$0" && as_myself=$as_dir/$0 && break
+done
+
+       ;;
+  esac
+  # We did not find ourselves, most probably we were run as `sh COMMAND'
+  # in which case we are not to be found in the path.
+  if test "x$as_myself" = x; then
+    as_myself=$0
+  fi
+  if test ! -f "$as_myself"; then
+    { { echo "$as_me:$LINENO: error: cannot find myself; rerun with an absolute path" >&5
+echo "$as_me: error: cannot find myself; rerun with an absolute path" >&2;}
+   { (exit 1); exit 1; }; }
+  fi
+  case $CONFIG_SHELL in
+  '')
+    as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for as_base in sh bash ksh sh5; do
+	 case $as_dir in
+	 /*)
+	   if ("$as_dir/$as_base" -c '
+  as_lineno_1=$LINENO
+  as_lineno_2=$LINENO
+  as_lineno_3=`(expr $as_lineno_1 + 1) 2>/dev/null`
+  test "x$as_lineno_1" != "x$as_lineno_2" &&
+  test "x$as_lineno_3"  = "x$as_lineno_2" ') 2>/dev/null; then
+	     $as_unset BASH_ENV || test "${BASH_ENV+set}" != set || { BASH_ENV=; export BASH_ENV; }
+	     $as_unset ENV || test "${ENV+set}" != set || { ENV=; export ENV; }
+	     CONFIG_SHELL=$as_dir/$as_base
+	     export CONFIG_SHELL
+	     exec "$CONFIG_SHELL" "$0" ${1+"$@"}
+	   fi;;
+	 esac
+       done
+done
+;;
+  esac
+
+  # Create $as_me.lineno as a copy of $as_myself, but with $LINENO
+  # uniformly replaced by the line number.  The first 'sed' inserts a
+  # line-number line before each line; the second 'sed' does the real
+  # work.  The second script uses 'N' to pair each line-number line
+  # with the numbered line, and appends trailing '-' during
+  # substitution so that $LINENO is not a special case at line end.
+  # (Raja R Harinath suggested sed '=', and Paul Eggert wrote the
+  # second 'sed' script.  Blame Lee E. McMahon for sed's syntax.  :-)
+  sed '=' <$as_myself |
+    sed '
+      N
+      s,$,-,
+      : loop
+      s,^\(['$as_cr_digits']*\)\(.*\)[$]LINENO\([^'$as_cr_alnum'_]\),\1\2\1\3,
+      t loop
+      s,-$,,
+      s,^['$as_cr_digits']*\n,,
+    ' >$as_me.lineno &&
+  chmod +x $as_me.lineno ||
+    { { echo "$as_me:$LINENO: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&5
+echo "$as_me: error: cannot create $as_me.lineno; rerun with a POSIX shell" >&2;}
+   { (exit 1); exit 1; }; }
+
+  # Don't try to exec as it changes $[0], causing all sort of problems
+  # (the dirname of $[0] is not the place where we might find the
+  # original and so on.  Autoconf is especially sensible to this).
+  . ./$as_me.lineno
+  # Exit status is that of the last command.
+  exit
+}
+
+
+case `echo "testing\c"; echo 1,2,3`,`echo -n testing; echo 1,2,3` in
+  *c*,-n*) ECHO_N= ECHO_C='
+' ECHO_T='	' ;;
+  *c*,*  ) ECHO_N=-n ECHO_C= ECHO_T= ;;
+  *)       ECHO_N= ECHO_C='\c' ECHO_T= ;;
+esac
+
+if expr a : '\(a\)' >/dev/null 2>&1; then
+  as_expr=expr
+else
+  as_expr=false
+fi
+
+rm -f conf$$ conf$$.exe conf$$.file
+echo >conf$$.file
+if ln -s conf$$.file conf$$ 2>/dev/null; then
+  # We could just check for DJGPP; but this test a) works b) is more generic
+  # and c) will remain valid once DJGPP supports symlinks (DJGPP 2.04).
+  if test -f conf$$.exe; then
+    # Don't use ln at all; we don't have any links
+    as_ln_s='cp -p'
+  else
+    as_ln_s='ln -s'
+  fi
+elif ln conf$$.file conf$$ 2>/dev/null; then
+  as_ln_s=ln
+else
+  as_ln_s='cp -p'
+fi
+rm -f conf$$ conf$$.exe conf$$.file
+
+if mkdir -p . 2>/dev/null; then
+  as_mkdir_p=:
+else
+  test -d ./-p && rmdir ./-p
+  as_mkdir_p=false
+fi
+
+as_executable_p="test -f"
+
+# Sed expression to map a string onto a valid CPP name.
+as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+
+# Sed expression to map a string onto a valid variable name.
+as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+
+
+# IFS
+# We need space, tab and new line, in precisely that order.
+as_nl='
+'
+IFS=" 	$as_nl"
+
+# CDPATH.
+$as_unset CDPATH
+
+exec 6>&1
+
+# Open the log real soon, to keep \$[0] and so on meaningful, and to
+# report actual input values of CONFIG_FILES etc. instead of their
+# values after options handling.  Logging --version etc. is OK.
+exec 5>>config.log
+{
+  echo
+  sed 'h;s/./-/g;s/^.../## /;s/...$/ ##/;p;x;p;x' <<_ASBOX
+## Running $as_me. ##
+_ASBOX
+} >&5
+cat >&5 <<_CSEOF
+
+This file was extended by $as_me, which was
+generated by GNU Autoconf 2.59.  Invocation command line was
+
+  CONFIG_FILES    = $CONFIG_FILES
+  CONFIG_HEADERS  = $CONFIG_HEADERS
+  CONFIG_LINKS    = $CONFIG_LINKS
+  CONFIG_COMMANDS = $CONFIG_COMMANDS
+  $ $0 $@
+
+_CSEOF
+echo "on `(hostname || uname -n) 2>/dev/null | sed 1q`" >&5
+echo >&5
+_ACEOF
+
+# Files that config.status was made for.
+if test -n "$ac_config_files"; then
+  echo "config_files=\"$ac_config_files\"" >>$CONFIG_STATUS
+fi
+
+if test -n "$ac_config_headers"; then
+  echo "config_headers=\"$ac_config_headers\"" >>$CONFIG_STATUS
+fi
+
+if test -n "$ac_config_links"; then
+  echo "config_links=\"$ac_config_links\"" >>$CONFIG_STATUS
+fi
+
+if test -n "$ac_config_commands"; then
+  echo "config_commands=\"$ac_config_commands\"" >>$CONFIG_STATUS
+fi
+
+cat >>$CONFIG_STATUS <<\_ACEOF
+
+ac_cs_usage="\
+\`$as_me' instantiates files from templates according to the
+current configuration.
+
+Usage: $0 [OPTIONS] [FILE]...
+
+  -h, --help       print this help, then exit
+  -V, --version    print version number, then exit
+  -q, --quiet      do not print progress messages
+  -d, --debug      don't remove temporary files
+      --recheck    update $as_me by reconfiguring in the same conditions
+  --file=FILE[:TEMPLATE]
+		   instantiate the configuration file FILE
+
+Configuration files:
+$config_files
+
+Report bugs to <bug-autoconf@gnu.org>."
+_ACEOF
+
+cat >>$CONFIG_STATUS <<_ACEOF
+ac_cs_version="\\
+config.status
+configured by $0, generated by GNU Autoconf 2.59,
+  with options \\"`echo "$ac_configure_args" | sed 's/[\\""\`\$]/\\\\&/g'`\\"
+
+Copyright (C) 2003 Free Software Foundation, Inc.
+This config.status script is free software; the Free Software Foundation
+gives unlimited permission to copy, distribute and modify it."
+srcdir=$srcdir
+INSTALL="$INSTALL"
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF
+# If no file are specified by the user, then we need to provide default
+# value.  By we need to know if files were specified by the user.
+ac_need_defaults=:
+while test $# != 0
+do
+  case $1 in
+  --*=*)
+    ac_option=`expr "x$1" : 'x\([^=]*\)='`
+    ac_optarg=`expr "x$1" : 'x[^=]*=\(.*\)'`
+    ac_shift=:
+    ;;
+  -*)
+    ac_option=$1
+    ac_optarg=$2
+    ac_shift=shift
+    ;;
+  *) # This is not an option, so the user has probably given explicit
+     # arguments.
+     ac_option=$1
+     ac_need_defaults=false;;
+  esac
+
+  case $ac_option in
+  # Handling of the options.
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF
+  -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
+    ac_cs_recheck=: ;;
+  --version | --vers* | -V )
+    echo "$ac_cs_version"; exit 0 ;;
+  --he | --h)
+    # Conflict between --help and --header
+    { { echo "$as_me:$LINENO: error: ambiguous option: $1
+Try \`$0 --help' for more information." >&5
+echo "$as_me: error: ambiguous option: $1
+Try \`$0 --help' for more information." >&2;}
+   { (exit 1); exit 1; }; };;
+  --help | --hel | -h )
+    echo "$ac_cs_usage"; exit 0 ;;
+  --debug | --d* | -d )
+    debug=: ;;
+  --file | --fil | --fi | --f )
+    $ac_shift
+    CONFIG_FILES="$CONFIG_FILES $ac_optarg"
+    ac_need_defaults=false;;
+  --header | --heade | --head | --hea )
+    $ac_shift
+    CONFIG_HEADERS="$CONFIG_HEADERS $ac_optarg"
+    ac_need_defaults=false;;
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil | --si | --s)
+    ac_cs_silent=: ;;
+
+  # This is an error.
+  -*) { { echo "$as_me:$LINENO: error: unrecognized option: $1
+Try \`$0 --help' for more information." >&5
+echo "$as_me: error: unrecognized option: $1
+Try \`$0 --help' for more information." >&2;}
+   { (exit 1); exit 1; }; } ;;
+
+  *) ac_config_targets="$ac_config_targets $1" ;;
+
+  esac
+  shift
+done
+
+ac_configure_extra_args=
+
+if $ac_cs_silent; then
+  exec 6>/dev/null
+  ac_configure_extra_args="$ac_configure_extra_args --silent"
+fi
+
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF
+if \$ac_cs_recheck; then
+  echo "running $SHELL $0 " $ac_configure_args \$ac_configure_extra_args " --no-create --no-recursion" >&6
+  exec $SHELL $0 $ac_configure_args \$ac_configure_extra_args --no-create --no-recursion
+fi
+
+_ACEOF
+
+
+
+
+
+cat >>$CONFIG_STATUS <<\_ACEOF
+for ac_config_target in $ac_config_targets
+do
+  case "$ac_config_target" in
+  # Handling of arguments.
+  "Makefile" ) CONFIG_FILES="$CONFIG_FILES Makefile" ;;
+  *) { { echo "$as_me:$LINENO: error: invalid argument: $ac_config_target" >&5
+echo "$as_me: error: invalid argument: $ac_config_target" >&2;}
+   { (exit 1); exit 1; }; };;
+  esac
+done
+
+# If the user did not use the arguments to specify the items to instantiate,
+# then the envvar interface is used.  Set only those that are not.
+# We use the long form for the default assignment because of an extremely
+# bizarre bug on SunOS 4.1.3.
+if $ac_need_defaults; then
+  test "${CONFIG_FILES+set}" = set || CONFIG_FILES=$config_files
+fi
+
+# Have a temporary directory for convenience.  Make it in the build tree
+# simply because there is no reason to put it here, and in addition,
+# creating and moving files from /tmp can sometimes cause problems.
+# Create a temporary directory, and hook for its removal unless debugging.
+$debug ||
+{
+  trap 'exit_status=$?; rm -rf $tmp && exit $exit_status' 0
+  trap '{ (exit 1); exit 1; }' 1 2 13 15
+}
+
+# Create a (secure) tmp directory for tmp files.
+
+{
+  tmp=`(umask 077 && mktemp -d -q "./confstatXXXXXX") 2>/dev/null` &&
+  test -n "$tmp" && test -d "$tmp"
+}  ||
+{
+  tmp=./confstat$$-$RANDOM
+  (umask 077 && mkdir $tmp)
+} ||
+{
+   echo "$me: cannot create a temporary directory in ." >&2
+   { (exit 1); exit 1; }
+}
+
+_ACEOF
+
+cat >>$CONFIG_STATUS <<_ACEOF
+
+#
+# CONFIG_FILES section.
+#
+
+# No need to generate the scripts if there are no CONFIG_FILES.
+# This happens for instance when ./config.status config.h
+if test -n "\$CONFIG_FILES"; then
+  # Protect against being on the right side of a sed subst in config.status.
+  sed 's/,@/@@/; s/@,/@@/; s/,;t t\$/@;t t/; /@;t t\$/s/[\\\\&,]/\\\\&/g;
+   s/@@/,@/; s/@@/@,/; s/@;t t\$/,;t t/' >\$tmp/subs.sed <<\\CEOF
+s,@SHELL@,$SHELL,;t t
+s,@PATH_SEPARATOR@,$PATH_SEPARATOR,;t t
+s,@PACKAGE_NAME@,$PACKAGE_NAME,;t t
+s,@PACKAGE_TARNAME@,$PACKAGE_TARNAME,;t t
+s,@PACKAGE_VERSION@,$PACKAGE_VERSION,;t t
+s,@PACKAGE_STRING@,$PACKAGE_STRING,;t t
+s,@PACKAGE_BUGREPORT@,$PACKAGE_BUGREPORT,;t t
+s,@exec_prefix@,$exec_prefix,;t t
+s,@prefix@,$prefix,;t t
+s,@program_transform_name@,$program_transform_name,;t t
+s,@bindir@,$bindir,;t t
+s,@sbindir@,$sbindir,;t t
+s,@libexecdir@,$libexecdir,;t t
+s,@datadir@,$datadir,;t t
+s,@sysconfdir@,$sysconfdir,;t t
+s,@sharedstatedir@,$sharedstatedir,;t t
+s,@localstatedir@,$localstatedir,;t t
+s,@libdir@,$libdir,;t t
+s,@includedir@,$includedir,;t t
+s,@oldincludedir@,$oldincludedir,;t t
+s,@infodir@,$infodir,;t t
+s,@mandir@,$mandir,;t t
+s,@build_alias@,$build_alias,;t t
+s,@host_alias@,$host_alias,;t t
+s,@target_alias@,$target_alias,;t t
+s,@DEFS@,$DEFS,;t t
+s,@ECHO_C@,$ECHO_C,;t t
+s,@ECHO_N@,$ECHO_N,;t t
+s,@ECHO_T@,$ECHO_T,;t t
+s,@LIBS@,$LIBS,;t t
+s,@CXX@,$CXX,;t t
+s,@CXXFLAGS@,$CXXFLAGS,;t t
+s,@LDFLAGS@,$LDFLAGS,;t t
+s,@CPPFLAGS@,$CPPFLAGS,;t t
+s,@ac_ct_CXX@,$ac_ct_CXX,;t t
+s,@EXEEXT@,$EXEEXT,;t t
+s,@OBJEXT@,$OBJEXT,;t t
+s,@CC@,$CC,;t t
+s,@CFLAGS@,$CFLAGS,;t t
+s,@ac_ct_CC@,$ac_ct_CC,;t t
+s,@INSTALL_PROGRAM@,$INSTALL_PROGRAM,;t t
+s,@INSTALL_SCRIPT@,$INSTALL_SCRIPT,;t t
+s,@INSTALL_DATA@,$INSTALL_DATA,;t t
+s,@CXXCPP@,$CXXCPP,;t t
+s,@X_CFLAGS@,$X_CFLAGS,;t t
+s,@X_PRE_LIBS@,$X_PRE_LIBS,;t t
+s,@X_LIBS@,$X_LIBS,;t t
+s,@X_EXTRA_LIBS@,$X_EXTRA_LIBS,;t t
+s,@LIBVERSION@,$LIBVERSION,;t t
+s,@VERSION@,$VERSION,;t t
+s,@MAKEDEPEND@,$MAKEDEPEND,;t t
+s,@ALL@,$ALL,;t t
+s,@LIBOBJS@,$LIBOBJS,;t t
+s,@LTLIBOBJS@,$LTLIBOBJS,;t t
+CEOF
+
+_ACEOF
+
+  cat >>$CONFIG_STATUS <<\_ACEOF
+  # Split the substitutions into bite-sized pieces for seds with
+  # small command number limits, like on Digital OSF/1 and HP-UX.
+  ac_max_sed_lines=48
+  ac_sed_frag=1 # Number of current file.
+  ac_beg=1 # First line for current file.
+  ac_end=$ac_max_sed_lines # Line after last line for current file.
+  ac_more_lines=:
+  ac_sed_cmds=
+  while $ac_more_lines; do
+    if test $ac_beg -gt 1; then
+      sed "1,${ac_beg}d; ${ac_end}q" $tmp/subs.sed >$tmp/subs.frag
+    else
+      sed "${ac_end}q" $tmp/subs.sed >$tmp/subs.frag
+    fi
+    if test ! -s $tmp/subs.frag; then
+      ac_more_lines=false
+    else
+      # The purpose of the label and of the branching condition is to
+      # speed up the sed processing (if there are no `@' at all, there
+      # is no need to browse any of the substitutions).
+      # These are the two extra sed commands mentioned above.
+      (echo ':t
+  /@[a-zA-Z_][a-zA-Z_0-9]*@/!b' && cat $tmp/subs.frag) >$tmp/subs-$ac_sed_frag.sed
+      if test -z "$ac_sed_cmds"; then
+	ac_sed_cmds="sed -f $tmp/subs-$ac_sed_frag.sed"
+      else
+	ac_sed_cmds="$ac_sed_cmds | sed -f $tmp/subs-$ac_sed_frag.sed"
+      fi
+      ac_sed_frag=`expr $ac_sed_frag + 1`
+      ac_beg=$ac_end
+      ac_end=`expr $ac_end + $ac_max_sed_lines`
+    fi
+  done
+  if test -z "$ac_sed_cmds"; then
+    ac_sed_cmds=cat
+  fi
+fi # test -n "$CONFIG_FILES"
+
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF
+for ac_file in : $CONFIG_FILES; do test "x$ac_file" = x: && continue
+  # Support "outfile[:infile[:infile...]]", defaulting infile="outfile.in".
+  case $ac_file in
+  - | *:- | *:-:* ) # input from stdin
+	cat >$tmp/stdin
+	ac_file_in=`echo "$ac_file" | sed 's,[^:]*:,,'`
+	ac_file=`echo "$ac_file" | sed 's,:.*,,'` ;;
+  *:* ) ac_file_in=`echo "$ac_file" | sed 's,[^:]*:,,'`
+	ac_file=`echo "$ac_file" | sed 's,:.*,,'` ;;
+  * )   ac_file_in=$ac_file.in ;;
+  esac
+
+  # Compute @srcdir@, @top_srcdir@, and @INSTALL@ for subdirectories.
+  ac_dir=`(dirname "$ac_file") 2>/dev/null ||
+$as_expr X"$ac_file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$ac_file" : 'X\(//\)[^/]' \| \
+	 X"$ac_file" : 'X\(//\)$' \| \
+	 X"$ac_file" : 'X\(/\)' \| \
+	 .     : '\(.\)' 2>/dev/null ||
+echo X"$ac_file" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; }
+  	  /^X\(\/\/\)[^/].*/{ s//\1/; q; }
+  	  /^X\(\/\/\)$/{ s//\1/; q; }
+  	  /^X\(\/\).*/{ s//\1/; q; }
+  	  s/.*/./; q'`
+  { if $as_mkdir_p; then
+    mkdir -p "$ac_dir"
+  else
+    as_dir="$ac_dir"
+    as_dirs=
+    while test ! -d "$as_dir"; do
+      as_dirs="$as_dir $as_dirs"
+      as_dir=`(dirname "$as_dir") 2>/dev/null ||
+$as_expr X"$as_dir" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$as_dir" : 'X\(//\)[^/]' \| \
+	 X"$as_dir" : 'X\(//\)$' \| \
+	 X"$as_dir" : 'X\(/\)' \| \
+	 .     : '\(.\)' 2>/dev/null ||
+echo X"$as_dir" |
+    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; }
+  	  /^X\(\/\/\)[^/].*/{ s//\1/; q; }
+  	  /^X\(\/\/\)$/{ s//\1/; q; }
+  	  /^X\(\/\).*/{ s//\1/; q; }
+  	  s/.*/./; q'`
+    done
+    test ! -n "$as_dirs" || mkdir $as_dirs
+  fi || { { echo "$as_me:$LINENO: error: cannot create directory \"$ac_dir\"" >&5
+echo "$as_me: error: cannot create directory \"$ac_dir\"" >&2;}
+   { (exit 1); exit 1; }; }; }
+
+  ac_builddir=.
+
+if test "$ac_dir" != .; then
+  ac_dir_suffix=/`echo "$ac_dir" | sed 's,^\.[\\/],,'`
+  # A "../" for each directory in $ac_dir_suffix.
+  ac_top_builddir=`echo "$ac_dir_suffix" | sed 's,/[^\\/]*,../,g'`
+else
+  ac_dir_suffix= ac_top_builddir=
+fi
+
+case $srcdir in
+  .)  # No --srcdir option.  We are building in place.
+    ac_srcdir=.
+    if test -z "$ac_top_builddir"; then
+       ac_top_srcdir=.
+    else
+       ac_top_srcdir=`echo $ac_top_builddir | sed 's,/$,,'`
+    fi ;;
+  [\\/]* | ?:[\\/]* )  # Absolute path.
+    ac_srcdir=$srcdir$ac_dir_suffix;
+    ac_top_srcdir=$srcdir ;;
+  *) # Relative path.
+    ac_srcdir=$ac_top_builddir$srcdir$ac_dir_suffix
+    ac_top_srcdir=$ac_top_builddir$srcdir ;;
+esac
+
+# Do not use `cd foo && pwd` to compute absolute paths, because
+# the directories may not exist.
+case `pwd` in
+.) ac_abs_builddir="$ac_dir";;
+*)
+  case "$ac_dir" in
+  .) ac_abs_builddir=`pwd`;;
+  [\\/]* | ?:[\\/]* ) ac_abs_builddir="$ac_dir";;
+  *) ac_abs_builddir=`pwd`/"$ac_dir";;
+  esac;;
+esac
+case $ac_abs_builddir in
+.) ac_abs_top_builddir=${ac_top_builddir}.;;
+*)
+  case ${ac_top_builddir}. in
+  .) ac_abs_top_builddir=$ac_abs_builddir;;
+  [\\/]* | ?:[\\/]* ) ac_abs_top_builddir=${ac_top_builddir}.;;
+  *) ac_abs_top_builddir=$ac_abs_builddir/${ac_top_builddir}.;;
+  esac;;
+esac
+case $ac_abs_builddir in
+.) ac_abs_srcdir=$ac_srcdir;;
+*)
+  case $ac_srcdir in
+  .) ac_abs_srcdir=$ac_abs_builddir;;
+  [\\/]* | ?:[\\/]* ) ac_abs_srcdir=$ac_srcdir;;
+  *) ac_abs_srcdir=$ac_abs_builddir/$ac_srcdir;;
+  esac;;
+esac
+case $ac_abs_builddir in
+.) ac_abs_top_srcdir=$ac_top_srcdir;;
+*)
+  case $ac_top_srcdir in
+  .) ac_abs_top_srcdir=$ac_abs_builddir;;
+  [\\/]* | ?:[\\/]* ) ac_abs_top_srcdir=$ac_top_srcdir;;
+  *) ac_abs_top_srcdir=$ac_abs_builddir/$ac_top_srcdir;;
+  esac;;
+esac
+
+
+  case $INSTALL in
+  [\\/$]* | ?:[\\/]* ) ac_INSTALL=$INSTALL ;;
+  *) ac_INSTALL=$ac_top_builddir$INSTALL ;;
+  esac
+
+  if test x"$ac_file" != x-; then
+    { echo "$as_me:$LINENO: creating $ac_file" >&5
+echo "$as_me: creating $ac_file" >&6;}
+    rm -f "$ac_file"
+  fi
+  # Let's still pretend it is `configure' which instantiates (i.e., don't
+  # use $as_me), people would be surprised to read:
+  #    /* config.h.  Generated by config.status.  */
+  if test x"$ac_file" = x-; then
+    configure_input=
+  else
+    configure_input="$ac_file.  "
+  fi
+  configure_input=$configure_input"Generated from `echo $ac_file_in |
+				     sed 's,.*/,,'` by configure."
+
+  # First look for the input files in the build tree, otherwise in the
+  # src tree.
+  ac_file_inputs=`IFS=:
+    for f in $ac_file_in; do
+      case $f in
+      -) echo $tmp/stdin ;;
+      [\\/$]*)
+	 # Absolute (can't be DOS-style, as IFS=:)
+	 test -f "$f" || { { echo "$as_me:$LINENO: error: cannot find input file: $f" >&5
+echo "$as_me: error: cannot find input file: $f" >&2;}
+   { (exit 1); exit 1; }; }
+	 echo "$f";;
+      *) # Relative
+	 if test -f "$f"; then
+	   # Build tree
+	   echo "$f"
+	 elif test -f "$srcdir/$f"; then
+	   # Source tree
+	   echo "$srcdir/$f"
+	 else
+	   # /dev/null tree
+	   { { echo "$as_me:$LINENO: error: cannot find input file: $f" >&5
+echo "$as_me: error: cannot find input file: $f" >&2;}
+   { (exit 1); exit 1; }; }
+	 fi;;
+      esac
+    done` || { (exit 1); exit 1; }
+_ACEOF
+cat >>$CONFIG_STATUS <<_ACEOF
+  sed "$ac_vpsub
+$extrasub
+_ACEOF
+cat >>$CONFIG_STATUS <<\_ACEOF
+:t
+/@[a-zA-Z_][a-zA-Z_0-9]*@/!b
+s,@configure_input@,$configure_input,;t t
+s,@srcdir@,$ac_srcdir,;t t
+s,@abs_srcdir@,$ac_abs_srcdir,;t t
+s,@top_srcdir@,$ac_top_srcdir,;t t
+s,@abs_top_srcdir@,$ac_abs_top_srcdir,;t t
+s,@builddir@,$ac_builddir,;t t
+s,@abs_builddir@,$ac_abs_builddir,;t t
+s,@top_builddir@,$ac_top_builddir,;t t
+s,@abs_top_builddir@,$ac_abs_top_builddir,;t t
+s,@INSTALL@,$ac_INSTALL,;t t
+" $ac_file_inputs | (eval "$ac_sed_cmds") >$tmp/out
+  rm -f $tmp/stdin
+  if test x"$ac_file" != x-; then
+    mv $tmp/out $ac_file
+  else
+    cat $tmp/out
+    rm -f $tmp/out
+  fi
+
+done
+_ACEOF
+
+cat >>$CONFIG_STATUS <<\_ACEOF
+
+{ (exit 0); exit 0; }
+_ACEOF
+chmod +x $CONFIG_STATUS
+ac_clean_files=$ac_clean_files_save
+
+
+# configure is writing to config.log, and then calls config.status.
+# config.status does its own redirection, appending to config.log.
+# Unfortunately, on DOS this fails, as config.log is still kept open
+# by configure, so config.status won't be able to write to it; its
+# output is simply discarded.  So we exec the FD to /dev/null,
+# effectively closing config.log, so it can be properly (re)opened and
+# appended to by config.status.  When coming back to configure, we
+# need to make the FD available again.
+if test "$no_create" != yes; then
+  ac_cs_success=:
+  ac_config_status_args=
+  test "$silent" = yes &&
+    ac_config_status_args="$ac_config_status_args --quiet"
+  exec 5>/dev/null
+  $SHELL $CONFIG_STATUS $ac_config_status_args || ac_cs_success=false
+  exec 5>>config.log
+  # Use ||, not &&, to avoid exiting from the if with $? = 1, which
+  # would make configure fail if this is the last instruction.
+  $ac_cs_success || { (exit 1); exit 1; }
+fi
+
diff --git a/nxcompext/configure.in b/nxcompext/configure.in
new file mode 100644
index 000000000..fe5abf7cb
--- /dev/null
+++ b/nxcompext/configure.in
@@ -0,0 +1,249 @@
+dnl Process this file with autoconf to produce a configure script.
+
+dnl Prolog
+
+AC_INIT(NXlib.h)
+AC_PREREQ(2.13)
+
+dnl Reset default compilation flags.
+
+CXXFLAGS="-O3"
+CFLAGS="-O3"
+
+dnl Reset default linking directives.
+
+LIBSTATIC=""
+LIBSHARED=""
+
+dnl Prefer headers and libraries from nx-X11, if present.
+
+if test -d "../nx-X11/include" ; then
+    CXXFLAGS="$CXXFLAGS -I../nx-X11/exports/include -I../nx-X11/lib/X11 \
+                        -I../nx-X11/include -I../nx-X11/programs/Xserver/include"
+    CFLAGS="$CFLAGS -I../nx-X11/exports/include -I../nx-X11/lib/X11 \
+                    -I../nx-X11/include -I../nx-X11/programs/Xserver/include"
+    LDFLAGS="$LDFLAGS -L../nx-X11/exports/lib"
+fi
+
+dnl Check for programs.
+
+AC_PROG_CXX
+AC_PROG_CC
+AC_LANG_CPLUSPLUS
+
+dnl Check for BSD compatible install.
+
+AC_PROG_INSTALL
+
+dnl Check for extra header files.
+
+AC_PATH_XTRA
+
+dnl Custom addition.
+ac_help="$ac_help
+  --with-symbols          add the -g flag to produce the debug symbols
+  --with-info             enable basic log output to trace the program
+  --with-valgrind         clean up allocated buffers to avoid valgrind warnings
+  --with-version          use this version for produced libraries
+
+  --with-static-png       enable static linking of PNG library
+  --with-static-jpeg      enable static linking of JPEG library"
+
+dnl Check to see if we're running under Cygwin32.
+
+AC_DEFUN(nxproxy_CYGWIN32,
+[AC_CACHE_CHECK(for Cygwin32 environment, nxproxy_cv_cygwin32,
+[AC_TRY_COMPILE(,[return __CYGWIN32__;],
+nxproxy_cv_cygwin32=yes, nxproxy_cv_cygwin32=no)
+rm -f conftest*])
+CYGWIN32=
+test "$nxproxy_cv_cygwin32" = yes && CYGWIN32=yes])
+
+dnl CygWin32 requires the stdc++ library explicitly linked.
+
+nxproxy_CYGWIN32
+if test "$CYGWIN32" = yes; then
+    LIBS="$LIBS -mwindows -lstdc++"
+fi
+
+dnl Check whether we're building on a AMD64.
+
+AC_DEFUN(nxconf_AMD64,
+[AC_CACHE_CHECK(for Amd64 environment, nxconf_cv_amd64,
+[AC_TRY_COMPILE(,[return (__amd64__ || __x86_64__);],
+nxconf_cv_amd64=yes, nxconf_cv_amd64=no)
+rm -f conftest*])
+AMD64=
+test "$nxconf_cv_amd64" = yes && AMD64=yes])
+nxconf_AMD64
+
+dnl Check to see if we're running under Solaris.
+
+AC_DEFUN(nxconf_SUN,
+[AC_CACHE_CHECK(for SunOS environment, nxconf_cv_sun,
+[AC_TRY_COMPILE(,[return __sun;],
+nxconf_cv_sun=yes, nxconf_cv_sun=no)
+rm -f conftest*])
+SUN=
+test "$nxconf_cv_sun" = yes && SUN=yes])
+nxconf_SUN
+
+if test "$SUN" = yes; then
+  CFLAGS="$CFLAGS -I/usr/sfw/include"
+fi
+
+if test "$SUN" = yes; then
+  LDFLAGS="$LDFLAGS -G -h \$(LIBLOAD) -L/usr/sfw/lib" 
+else
+  LDFLAGS="$LDFLAGS -shared -Wl,-soname,\$(LIBLOAD)"
+fi
+
+dnl Check to see if we're running under FreeBSD.
+
+AC_DEFUN(nxconf_FreeBSD,
+[AC_CACHE_CHECK(for FreeBSD environment, nxconf_cv_freebsd,
+[AC_TRY_COMPILE(,[return __FreeBSD__;],
+nxconf_cv_freebsd=yes, nxconf_cv_freebsd=no)
+rm -f conftest*])
+FreeBSD=
+test "$nxconf_cv_freebsd" = yes && FreeBSD=yes])
+nxconf_FreeBSD
+
+dnl Build PIC libraries.
+
+if test "$CYGWIN32" != yes -a "$DARWIN" != yes; then
+  CXXFLAGS="$CXXFLAGS -fPIC"
+  CFLAGS="$CFLAGS -fPIC"
+fi
+
+dnl On FreeBSD search libraries and includes under /usr/local.
+
+if test "$FreeBSD" = yes; then
+  LIBS="$LIBS  -L/usr/local/lib"
+  CXXFLAGS="$CXXFLAGS -I/usr/local/include"
+  CFLAGS="$CFLAGS -I/usr/local/include"
+fi
+
+dnl Check whether --with-static-png  was
+dnl given and add -lpng or libpng.a to linking.
+
+if test "${with_static_png}" = yes; then
+  echo -e "enabling static linking of PNG library"
+  if test "$CYGWIN32" = yes; then
+    LIBS="$LIBSTATIC -static -lpng"
+  else
+    if test -f "/usr/lib/libpng.a" ; then
+      LIBS="/usr/lib/libpng.a $LIBS"
+    else
+      if test -f "/usr/local/lib/libpng.a" ; then
+        echo -e "assuming libpng.a in /usr/local/lib"
+        LIBS="/usr/local/lib/libpng.a $LIBS"
+      else
+        echo -e "assuming libpng.a in default linker path"
+        LIBS="libpng.a $LIBS"
+      fi
+    fi
+  fi
+else
+  echo -e "enabling dynamic linking of PNG library"
+  LIBS="-lpng $LIBS"
+fi
+
+dnl Check whether --with-static-jpeg  was
+dnl given and add -ljpeg or libjpeg.a to linking.
+if test "${with_static_jpeg}" = yes; then
+  echo -e "enabling static linking of JPEG library"
+  if test "$CYGWIN32" = yes; then
+    LIBSTATIC="$LIBS -static -ljpeg"
+  else
+    if test -f "/usr/lib/libjpeg.a" ; then
+      LIBS="/usr/lib/libjpeg.a $LIBS"
+    else
+      if test -f "/usr/local/lib/libjpeg.a" ; then
+        echo -e "assuming libjpeg.a in /usr/local/lib"
+        LIBS="/usr/local/lib/libjpeg.a $LIBS"
+      else
+        echo -e "assuming libjpeg.a in default linker path"
+        LIBS="libjpeg.a $LIBS"
+      fi
+    fi
+  fi
+else
+  echo -e "enabling dynamic linking of JPEG library"
+  LIBS="-ljpeg $LIBS"
+fi
+
+dnl Check whether --with-symbols or --without-symbols was
+dnl given and set the required optimization level.
+if test "${with_symbols}" = yes; then
+  echo -e "enabling production of debug symbols"
+  CXXFLAGS="-g $CXXFLAGS"
+  CFLAGS="-g $CFLAGS"
+else
+  echo -e "disabling production of debug symbols"
+fi
+
+dnl Check whether --with-info or --without-info was given.
+if test "${with_info}" = yes; then
+  echo -e "enabling info output in the log file"
+  CXXFLAGS="$CXXFLAGS -DINFO"
+  CFLAGS="$CFLAGS -DINFO"
+else
+  echo -e "disabling info output in the log file"
+fi
+
+dnl Check whether --with-valgrind or --without-valgrind was given.
+if test "${with_valgrind}" = yes; then
+  echo -e "enabling valgrind memory checker workarounds"
+  CXXFLAGS="$CXXFLAGS -DVALGRIND"
+  CFLAGS="$CFLAGS -DVALGRIND"
+else
+  echo -e "disabling valgrind memory checker workarounds"
+fi
+
+dnl Check whether --with-version was given.
+AC_SUBST(LIBVERSION)
+AC_SUBST(VERSION)
+if test "${with_version}" = yes; then
+  VERSION=${ac_option}
+else
+  VERSION=`cat VERSION`
+fi
+echo -e "compiling version ${VERSION}"
+
+LIBVERSION=`echo ${VERSION} | cut -d '.' -f 1`
+
+CXXFLAGS="$CXXFLAGS -DVERSION=\\\"${VERSION}\\\""
+CFLAGS="$CFLAGS -DVERSION=\\\"${VERSION}\\\""
+
+dnl Find makedepend somewhere.
+
+AC_SUBST(MAKEDEPEND)
+
+if test -x "../nx-X11/config/makedepend/makedepend" ; then
+  MAKEDEPEND=../nx-X11/config/makedepend/makedepend
+else
+  if test -x "/usr/X11R6/bin/makedepend" ; then
+    MAKEDEPEND=/usr/X11R6/bin/makedepend
+  else
+    if test -x "/usr/openwin/bin/makedepend" ; then
+      MAKEDEPEND=/usr/openwin/bin/makedepend
+    else
+      MAKEDEPEND=/usr/bin/makedepend
+    fi
+  fi
+fi
+
+dnl Determine what to build based on the platform.
+dnl Override the LIBS settings on Cygwin32 so that
+dnl we always link with the exact set of libraries.
+
+AC_SUBST(ALL)
+
+if test "$CYGWIN32" = yes; then
+    ALL="\$(LIBCYGARCHIVE) \$(LIBCYGSHARED) \$(LIBARCHIVE)"
+else
+    ALL="\$(LIBFULL) \$(LIBLOAD) \$(LIBSHARED) \$(LIBARCHIVE)"
+fi
+
+AC_OUTPUT(Makefile)
diff --git a/nxcompext/install-sh b/nxcompext/install-sh
new file mode 100755
index 000000000..58719246f
--- /dev/null
+++ b/nxcompext/install-sh
@@ -0,0 +1,238 @@
+#! /bin/sh
+#
+# install - install a program, script, or datafile
+# This comes from X11R5.
+#
+# Calling this script install-sh is preferred over install.sh, to prevent
+# `make' implicit rules from creating a file called install from it
+# when there is no Makefile.
+#
+# This script is compatible with the BSD install script, but was written
+# from scratch.
+#
+
+
+# set DOITPROG to echo to test this script
+
+# Don't use :- since 4.3BSD and earlier shells don't like it.
+doit="${DOITPROG-}"
+
+
+# put in absolute paths if you don't have them in your path; or use env. vars.
+
+mvprog="${MVPROG-mv}"
+cpprog="${CPPROG-cp}"
+chmodprog="${CHMODPROG-chmod}"
+chownprog="${CHOWNPROG-chown}"
+chgrpprog="${CHGRPPROG-chgrp}"
+stripprog="${STRIPPROG-strip}"
+rmprog="${RMPROG-rm}"
+mkdirprog="${MKDIRPROG-mkdir}"
+
+transformbasename=""
+transform_arg=""
+instcmd="$mvprog"
+chmodcmd="$chmodprog 0755"
+chowncmd=""
+chgrpcmd=""
+stripcmd=""
+rmcmd="$rmprog -f"
+mvcmd="$mvprog"
+src=""
+dst=""
+dir_arg=""
+
+while [ x"$1" != x ]; do
+    case $1 in
+	-c) instcmd="$cpprog"
+	    shift
+	    continue;;
+
+	-d) dir_arg=true
+	    shift
+	    continue;;
+
+	-m) chmodcmd="$chmodprog $2"
+	    shift
+	    shift
+	    continue;;
+
+	-o) chowncmd="$chownprog $2"
+	    shift
+	    shift
+	    continue;;
+
+	-g) chgrpcmd="$chgrpprog $2"
+	    shift
+	    shift
+	    continue;;
+
+	-s) stripcmd="$stripprog"
+	    shift
+	    continue;;
+
+	-t=*) transformarg=`echo $1 | sed 's/-t=//'`
+	    shift
+	    continue;;
+
+	-b=*) transformbasename=`echo $1 | sed 's/-b=//'`
+	    shift
+	    continue;;
+
+	*)  if [ x"$src" = x ]
+	    then
+		src=$1
+	    else
+		# this colon is to work around a 386BSD /bin/sh bug
+		:
+		dst=$1
+	    fi
+	    shift
+	    continue;;
+    esac
+done
+
+if [ x"$src" = x ]
+then
+	echo "install:	no input file specified"
+	exit 1
+else
+	true
+fi
+
+if [ x"$dir_arg" != x ]; then
+	dst=$src
+	src=""
+	
+	if [ -d $dst ]; then
+		instcmd=:
+	else
+		instcmd=mkdir
+	fi
+else
+
+# Waiting for this to be detected by the "$instcmd $src $dsttmp" command
+# might cause directories to be created, which would be especially bad 
+# if $src (and thus $dsttmp) contains '*'.
+
+	if [ -f $src -o -d $src ]
+	then
+		true
+	else
+		echo "install:  $src does not exist"
+		exit 1
+	fi
+	
+	if [ x"$dst" = x ]
+	then
+		echo "install:	no destination specified"
+		exit 1
+	else
+		true
+	fi
+
+# If destination is a directory, append the input filename; if your system
+# does not like double slashes in filenames, you may need to add some logic
+
+	if [ -d $dst ]
+	then
+		dst="$dst"/`basename $src`
+	else
+		true
+	fi
+fi
+
+## this sed command emulates the dirname command
+dstdir=`echo $dst | sed -e 's,[^/]*$,,;s,/$,,;s,^$,.,'`
+
+# Make sure that the destination directory exists.
+#  this part is taken from Noah Friedman's mkinstalldirs script
+
+# Skip lots of stat calls in the usual case.
+if [ ! -d "$dstdir" ]; then
+defaultIFS='	
+'
+IFS="${IFS-${defaultIFS}}"
+
+oIFS="${IFS}"
+# Some sh's can't handle IFS=/ for some reason.
+IFS='%'
+set - `echo ${dstdir} | sed -e 's@/@%@g' -e 's@^%@/@'`
+IFS="${oIFS}"
+
+pathcomp=''
+
+while [ $# -ne 0 ] ; do
+	pathcomp="${pathcomp}${1}"
+	shift
+
+	if [ ! -d "${pathcomp}" ] ;
+        then
+		$mkdirprog "${pathcomp}"
+	else
+		true
+	fi
+
+	pathcomp="${pathcomp}/"
+done
+fi
+
+if [ x"$dir_arg" != x ]
+then
+	$doit $instcmd $dst &&
+
+	if [ x"$chowncmd" != x ]; then $doit $chowncmd $dst; else true ; fi &&
+	if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dst; else true ; fi &&
+	if [ x"$stripcmd" != x ]; then $doit $stripcmd $dst; else true ; fi &&
+	if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dst; else true ; fi
+else
+
+# If we're going to rename the final executable, determine the name now.
+
+	if [ x"$transformarg" = x ] 
+	then
+		dstfile=`basename $dst`
+	else
+		dstfile=`basename $dst $transformbasename | 
+			sed $transformarg`$transformbasename
+	fi
+
+# don't allow the sed command to completely eliminate the filename
+
+	if [ x"$dstfile" = x ] 
+	then
+		dstfile=`basename $dst`
+	else
+		true
+	fi
+
+# Make a temp file name in the proper directory.
+
+	dsttmp=$dstdir/#inst.$$#
+
+# Move or copy the file name to the temp name
+
+	$doit $instcmd $src $dsttmp &&
+
+	trap "rm -f ${dsttmp}" 0 &&
+
+# and set any options; do chmod last to preserve setuid bits
+
+# If any of these fail, we abort the whole thing.  If we want to
+# ignore errors from any of these, just make sure not to ignore
+# errors from the above "$doit $instcmd $src $dsttmp" command.
+
+	if [ x"$chowncmd" != x ]; then $doit $chowncmd $dsttmp; else true;fi &&
+	if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dsttmp; else true;fi &&
+	if [ x"$stripcmd" != x ]; then $doit $stripcmd $dsttmp; else true;fi &&
+	if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dsttmp; else true;fi &&
+
+# Now rename the file to the real destination.
+
+	$doit $rmcmd -f $dstdir/$dstfile &&
+	$doit $mvcmd $dsttmp $dstdir/$dstfile 
+
+fi &&
+
+
+exit 0
diff --git a/nxcompext/mkinstalldirs b/nxcompext/mkinstalldirs
new file mode 100755
index 000000000..936cf3407
--- /dev/null
+++ b/nxcompext/mkinstalldirs
@@ -0,0 +1,34 @@
+#! /bin/sh
+# mkinstalldirs --- make directory hierarchy
+# Author: Noah Friedman <friedman@prep.ai.mit.edu>
+# Created: 1993-05-16
+# Last modified: 1995-03-05
+# Public domain
+
+errstatus=0
+
+for file in ${1+"$@"} ; do
+   set fnord `echo ":$file" | sed -ne 's/^:\//#/;s/^://;s/\// /g;s/^#/\//;p'`
+   shift
+
+   pathcomp=
+   for d in ${1+"$@"} ; do
+     pathcomp="$pathcomp$d"
+     case "$pathcomp" in
+       -* ) pathcomp=./$pathcomp ;;
+     esac
+
+     if test ! -d "$pathcomp"; then
+        echo "mkdir $pathcomp" 1>&2
+        mkdir "$pathcomp" > /dev/null 2>&1 || lasterr=$?
+     fi
+
+     if test ! -d "$pathcomp"; then
+	errstatus=$lasterr
+     fi
+
+     pathcomp="$pathcomp/"
+   done
+done
+
+exit $errstatus
diff --git a/nxcompext/nxagent.img b/nxcompext/nxagent.img
new file mode 100644
index 000000000..283ec03da
--- /dev/null
+++ b/nxcompext/nxagent.img