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diff --git a/nx-X11/lib/X11/UIThrStubs.c b/nx-X11/lib/X11/UIThrStubs.c
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+/*
+ * $XFree86: xc/lib/XThrStub/UIThrStubs.c,v 3.3 2001/11/18 21:13:26 herrb Exp $
+ *
+ * Copyright (c) 1995 David E. Wexelblat. All rights reserved
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL DAVID E. WEXELBLAT BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of David E. Wexelblat shall
+ * not be used in advertising or otherwise to promote the sale, use or
+ * other dealings in this Software without prior written authorization
+ * from David E. Wexelblat.
+ *
+ */
+
+/*
+ * Stubs for thread functions needed by the X library. Supports
+ * UnixWare 2.x threads; may support Solaris 2 threads as well, but not
+ * tested. Defining things this way removes the dependency of the X
+ * library on the threads library, but still supports threads if the user
+ * specificies the thread library on the link line.
+ */
+
+/*
+ * Modifications by Carlos A M dos Santos, XFree86 Project, November 1999.
+ *
+ * Explanation from <X11/Xos_r.h>:
+ * The structure below is complicated, mostly because P1003.1c (the
+ * IEEE POSIX Threads spec) went through lots of drafts, and some
+ * vendors shipped systems based on draft API that were changed later.
+ * Unfortunately POSIX did not provide a feature-test macro for
+ * distinguishing each of the drafts.
+ */
+
+#ifdef CTHREADS
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <cthreads.h>
+typedef cthread_t xthread_t;
+#define xthread_self cthread_self
+#pragma weak cthread_self = _Xthr_self_stub_
+#define xmutex_init mutex_init
+#pragma weak mutex_init = _Xthr_zero_stub_
+#pragma weak mutex_clear = _Xthr_zero_stub_
+#pragma weak mutex_lock = _Xthr_zero_stub_
+#pragma weak mutex_unlock = _Xthr_zero_stub_
+#pragma weak condition_init = _Xthr_zero_stub_
+#pragma weak condition_clear = _Xthr_zero_stub_
+#pragma weak condition_wait = _Xthr_zero_stub_
+#pragma weak condition_signal = _Xthr_zero_stub_
+#pragma weak condition_broadcast = _Xthr_zero_stub_
+#else /* !CTHREADS */
+#if defined(SVR4) && !defined(__sgi)
+#include <thread.h>
+typedef thread_t xthread_t;
+#pragma weak thr_self = _Xthr_self_stub_
+#pragma weak mutex_init = _Xthr_zero_stub_
+#pragma weak mutex_destroy = _Xthr_zero_stub_
+#pragma weak mutex_lock = _Xthr_zero_stub_
+#pragma weak mutex_unlock = _Xthr_zero_stub_
+#pragma weak cond_init = _Xthr_zero_stub_
+#pragma weak cond_destroy = _Xthr_zero_stub_
+#pragma weak cond_wait = _Xthr_zero_stub_
+#pragma weak cond_signal = _Xthr_zero_stub_
+#pragma weak cond_broadcast = _Xthr_zero_stub_
+#else /* !SVR4 */
+#ifdef WIN32
+ /*
+ * Don't know what to do here. Is there something do be done at all?
+ */
+#else /* !WIN32 */
+#ifdef USE_TIS_SUPPORT
+#include <tis.h>
+typedef pthread_t xthread_t;
+#pragma weak tis_self = _Xthr_self_stub_
+#pragma weak tis_mutex_init = _Xthr_zero_stub_
+#pragma weak tis_mutex_destroy = _Xthr_zero_stub_
+#pragma weak tis_mutex_lock = _Xthr_zero_stub_
+#pragma weak tis_mutex_unlock = _Xthr_zero_stub_
+#pragma weak tis_cond_init = _Xthr_zero_stub_
+#pragma weak tis_cond_destroy = _Xthr_zero_stub_
+#pragma weak tis_cond_wait = _Xthr_zero_stub_
+#pragma weak tis_cond_signal = _Xthr_zero_stub_
+#pragma weak tis_cond_broadcast = _Xthr_zero_stub_
+#else
+#include <pthread.h>
+typedef pthread_t xthread_t;
+#if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
+xthread_t pthread_self() __attribute__ ((weak, alias ("_Xthr_self_stub_")));
+int pthread_mutex_init() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
+int pthread_mutex_destroy() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
+int pthread_mutex_lock() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
+int pthread_mutex_unlock() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
+int pthread_cond_init() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
+int pthread_cond_destroy() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
+int pthread_cond_wait() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
+int pthread_cond_signal() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
+int pthread_cond_broadcast() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
+int pthread_key_create() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
+void *pthread_getspecific() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
+int pthread_setspecific() __attribute__ ((weak, alias ("_Xthr_zero_stub_")));
+#else /* __GNUC__ */
+#pragma weak pthread_self = _Xthr_self_stub_
+#pragma weak pthread_mutex_init = _Xthr_zero_stub_
+#pragma weak pthread_mutex_destroy = _Xthr_zero_stub_
+#pragma weak pthread_mutex_lock = _Xthr_zero_stub_
+#pragma weak pthread_mutex_unlock = _Xthr_zero_stub_
+#pragma weak pthread_cond_init = _Xthr_zero_stub_
+#pragma weak pthread_cond_destroy = _Xthr_zero_stub_
+#pragma weak pthread_cond_wait = _Xthr_zero_stub_
+#pragma weak pthread_cond_signal = _Xthr_zero_stub_
+#pragma weak pthread_cond_broadcast = _Xthr_zero_stub_
+/* These are added for libGL */
+#pragma weak pthread_key_create = _Xthr_zero_stub_
+#pragma weak pthread_getspecific = _Xthr_zero_stub_
+#pragma weak pthread_setspecific = _Xthr_zero_stub_
+#endif /* __GNUC__ */
+#if defined(_DECTHREADS_) || defined(linux)
+#pragma weak pthread_equal = _Xthr_equal_stub_ /* See Xthreads.h! */
+int
+_Xthr_equal_stub_()
+{
+ return(1);
+}
+#endif /* _DECTHREADS_ || linux */
+#endif /* USE_TIS_SUPPORT */
+#endif /* WIN32 */
+#endif /* SVR4 */
+#endif /* CTHREADS */
+
+static xthread_t
+_Xthr_self_stub_()
+{
+ static xthread_t _X_no_thread_id;
+
+ return(_X_no_thread_id); /* defined by <X11/Xthreads.h> */
+}
+
+static int
+_Xthr_zero_stub_()
+{
+ return(0);
+}