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authorReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
committerReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
+<HTML>
+<HEAD>
+<TITLE>GL widgets for Xt/Motif - XFree86 implementation</TITLE>
+<META NAME="generator" CONTENT="Only VIM and me.">
+</HEAD>
+<BODY BGCOLOR="#FFFFFF">
+
+<!-- $XFree86$ -->
+
+<H1 ALIGN=CENTER>GL widgets for Xt/Motif</H1>
+<H2 ALIGN=CENTER>XFree86 implementation</H1>
+<P ALIGN=CENTER>by Carlos A. M. dos Santos<BR>casantos@cpmet.ufpel.tche.br</P>
+
+<HR NOSHADE>
+
+<H3>1. Introduction</H3>
+<P>
+This directory contains the source code for SGI's OpenGL Xt/Motif(TM) widgets,
+slightly modified to generate both Motif 1.x and 2.x versions of
+the widget even if Motif is not available, as in the XFree86 distribution of
+the X Window System. This code is based on that distributed by Silicon
+Graphics as part of it's OpenGL Sample Implementation, not on the modified version
+distributed with Mesa.
+
+
+<H3>2. Installation</H3>
+<P>
+This code is intended to be compiled as part of the normal XFree86 building
+process, under the xc/lib/GLw directory. To compile the library out of the X
+source tree, follow instructions below.
+
+<H3>2.1. Requirements</H3>
+<P>
+Gzip and tar are needed to extract the files from the distribution <A
+HREF="http://www.inf.ufrgs.br/~casantos/libGLw/GLw.tar.gz">archive</A>. Tar is
+a standard UNIX utility but if you don't have it use GNU tar, available in
+source form at <A
+HREF="ftp://ftp.gnu.org/pub/gnu/">ftp://ftp.gnu.org/pub/gnu/</A>. Gzip is not
+a standard UNIX utility, though available in many systems. You may obtain it
+(also source form) at the same FTP server as GNU tar.
+
+<P>
+You need xmkmf and imake too. Depending on your operating system you may need
+to install some kind of X Window System development kit, so check the vendor
+documentation first. I was told that some UNIX systems don't have imake:
+report this as a bug (to your vendor, not me).
+
+<P>
+Of course you will need a C compiler.
+
+<H3>2.2. Steps</H3>
+<P>
+<OL>
+ <LI>Extract the source code from the distribution archive.
+ <P>
+ <CODE>
+ gzip -dc GLw.tar.gz | tar xf -
+ </CODE>
+ <P>
+ <LI>Go to the surce code directory and generate the makefile.
+ <P>
+ <CODE>
+ cd GLw<BR>
+ xmkmf
+ </CODE>
+ <P>For LessTif, use "mxmkmf" instead of "xmkmf". Imake support
+ is much better in recent versions of LessTif (since late july 2000).
+ If your Motif or OpenGL libraries and/or include files are installed in
+ non-standard locations (some UNIX vendors seem to be very creative :-)
+ then edit the file named Imakefile, remove the leading XCOMM of the
+ lines containing MOTIF_INCLUDES and MOTIF_LDFLAGS and set the
+ appropriate values.
+ <P>
+ <LI>Compile the code with
+ <P>
+ <CODE>
+ make includes<BR>
+ make standalone
+ </CODE>
+ <P>
+ <LI>Install the library and manual pages with
+ <P>
+ <CODE>
+ make install<BR>
+ make install.man
+ </CODE>
+ <P>
+ <LI>Optionally, you may compile two test programs: xmdemo and xtdemo. You need OpenGL
+ (or Mesa) for both and Motif (or LessTif) for xmdemo. There are four
+ extra make targers for these programs: demos, stand-demos, stand-xmdemo
+ and stand-xtdemo. You may use them with:
+ <P>
+ <CODE>
+ make stand-demos<BR>
+ ./xmdemo
+ ./xtdemo
+ </CODE>
+</OL>
+
+<H3>2.3. Creating a shared library</H3>
+<P>
+By default only a static library is created because most of the UNIX loaders,
+if not all, complain about unresolved symbols even if the application doesn't
+use the modules in which such symbols are referenced. However, if your system
+supports libraries with weak symbols (e.g. Solaris, FreeBSD and Linux) it is
+possible to fool the loader. All you have to do is edit the Imakefile,
+changing "#define SharedLibGLw" and "#define GLwUseXmStubs" to YES, then
+repeat the compilation process starting from step 2 in the previous section.
+
+<H3>2.4. Problems</H3>
+<P>
+If you have trouble, ask for help in the XFree86 "xperts" mailing list. Look
+at <A HREF="http://www.xfree86.org">http://www.xfree86.org</A> for
+instructions on how to subscribe. In desperation, send an email to <A
+HREF="mailto:casantos@cpmet.ufpel.tche.br">casantos@cpmet.ufpel.tche.br</A>.
+
+<P>
+PLEASE DO NOT SEND ME EMAIL ASKING HOW TO INSTALL OR CONFIGURE YOUR OPERATING
+SYSTEM, MODEM, NETWORK CARD, BREAD TOASTER, COFEE MAKER OR WHATEVER ELSE!
+
+
+<H3>3. Copyrights</H3>
+<P>
+Most of the code is covered by the following license terms:
+<BLOCKQUOTE>
+<P>
+License Applicability. Except to the extent portions of this file are
+made subject to an alternative license as permitted in the SGI Free
+Software License B, Version 1.1 (the "License"), the contents of this
+file are subject only to the provisions of the License. You may not use
+this file except in compliance with the License. You may obtain a copy
+of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+<P>
+<A
+HREF="http://oss.sgi.com/projects/FreeB">http://oss.sgi.com/projects/FreeB</A>
+<P>
+Note that, as provided in the License, the Software is distributed on an
+"AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+<P>
+Original Code. The Original Code is: OpenGL Sample Implementation,
+Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+Inc. The Original Code is Copyright &copy; 1991-2000 Silicon Graphics, Inc.
+Copyright in any portions created by third parties is as indicated
+elsewhere herein. All Rights Reserved.
+<P>
+Additional Notice Provisions: The application programming interfaces
+established by SGI in conjunction with the Original Code are The
+OpenGL&reg; Graphics System: A Specification (Version 1.2.1), released
+April 1, 1999; The OpenGL&reg; Graphics System Utility Library (Version
+1.3), released November 4, 1998; and OpenGL&reg; Graphics with the X
+Window System&reg; (Version 1.3), released October 19, 1998. This software
+was created using the OpenGL&reg; version 1.2.1 Sample Implementation
+published by SGI, but has not been independently verified as being
+compliant with the OpenGL&reg; version 1.2.1 Specification.
+</BLOCKQUOTE>
+
+<P>
+The demonstration programs are covered by the following license terms:
+
+<BLOCKQUOTE>
+<P>
+Copyright &copy; Mark J. Kilgard, 1995, 1996.
+
+<P>
+NOTICE: This source code distribution contains source code contained in
+the book "Programming OpenGL for the X Window System" (ISBN:
+0-201-48359-9) published by Addison-Wesley. The programs and associated
+files contained in the distribution were developed by Mark J. Kilgard and
+are Copyright 1994, 1995, 1996 by Mark J. Kilgard (unless otherwise
+noted). The programs are not in the public domain, but they are freely
+distributable without licensing fees. These programs are provided without
+guarantee or warrantee expressed or implied.
+</BLOCKQUOTE>
+
+<P>
+The files contained in directory GLwXm are fake Motif headers, covered by
+the XFree86 license, they permit us to generate both Motif 1.x and 2.x
+versions of the widget without having Motif. Notice that they are NOT part of
+a standard Motif distribution and shall not be used to compile any other code.
+
+
+<H3>4. Thanks</H3>
+
+<P>
+Many thanks to Silicon Graphics and Mark J. Kilgard for making their
+software free.
+
+
+<H3>5. No thanks</H3>
+
+<BLOCKQUOTE>
+<P>
+<STRONG>
+THIS SECTION CONTAINS MY PERSONAL OPINIONS AND
+DOESN'T REPRESENT AN OFFICIAL POSITION OF THE XFree86 PROJECT.
+</STRONG>
+</BLOCKQUOTE>
+
+<P>
+The first incarnation of this version of libGLw used eight header files from
+<A HREF="http://www.lesstif.org/">LessTif</A>, four for each Motif version.
+LessTif is covered by the GNU Library General Public License (LGPL) whose
+terms are not compatible with the XFree86 licensing policy. Since the
+copyright holder of LessTif is the <A HREF="http://www.fsf.org/">Free Software
+Foundation</A> (FSF), I asked Richard Stallman, president of FSF and so called
+"leader of the Free Software movement", permission to redistribute a copy of
+those eight headers under XFree86 terms, still maintaining the FSF copyright.
+
+<P>
+Observe that I was not asking him to change the license of LessTif as a whole,
+but only to allow me to distribute copies of some header files containing
+function prototypes, variable declarations and data type definitions. Even so,
+Stallman said no because the files contained "more than 6000 lines of code".
+Which code? The LessTif headers are mostly copies of the Motif ones and don't
+contain any original GNU "code"! I can't still imagine a reason for Stallman's
+negative answer except for paranoia. He seems to ignore what Motif is and
+that LessTif's API is simply a copy of Motif's one.
+
+<P>
+After spending some time, I made my own headers, that became much smaller than
+the previous ones because I included only a subset of the Motif API and merged
+everything into four files: 417 lines instead 6000. Humm, perhaps I should be
+grateful to Sallman too :-).
+
+
+<H3>6. Trademarks</H3>
+
+<P>
+<UL>
+ <LI>OpenGL is a trademark of Silicon Graphics, Inc.
+ <LI>Motif is a trademark of the Open Group.
+</UL>
+
+<HR NOSHADE>
+
+</BODY>
+</HTML>