re PR other/4372 (#pragma weak pthread* inclusion causes applications to crash without a linker error when one forgets to link with -lpthread)

gcc/ChangeLog:
PR other/4372
* gthr-dce.h, gthr-posix.h, gthr-posix95.h, gthr-solaris.h,
gthr-tpf.h: Define __gthrw.  For all identifiers that might
be weak, introduce weakrefs or non-weak aliases with __gthrw,
and prefix all uses with __ghtrw.
libobjc/ChangeLog:
PR other/4372
* thr-objc.c (_XOPEN_SOURCE): Define.

From-SVN: r106704

8 files changed, 349 insertions, 279 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index cdbf858..e97e5a3 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,6 +1,14 @@
 2005-11-09  Alexandre Oliva  <aoliva@redhat.com>
 
 	PR other/4372
+	* gthr-dce.h, gthr-posix.h, gthr-posix95.h, gthr-solaris.h,
+	gthr-tpf.h: Define __gthrw.  For all identifiers that might
+	be weak, introduce weakrefs or non-weak aliases with __gthrw,
+	and prefix all uses with __ghtrw.
+
+2005-11-09  Alexandre Oliva  <aoliva@redhat.com>
+
+	PR other/4372
 	* tree.h (IDENTIFIER_TRANSPARENT_ALIAS): New.
 	(TREE_DEPRECATED): Adjust comment.  Check for a DECL.
 	* c-common.c (handle_weakref_attribute): New.
diff --git a/gcc/gthr-dce.h b/gcc/gthr-dce.h
index f74a1b1..517f5a3 100644
--- a/gcc/gthr-dce.h
+++ b/gcc/gthr-dce.h
@@ -1,6 +1,7 @@
 /* Threads compatibility routines for libgcc2 and libobjc.  */
 /* Compile this one with gcc.  */
-/* Copyright (C) 1997, 1999, 2000, 2001, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1999, 2000, 2001, 2004, 2005
+   Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -54,48 +55,59 @@ typedef pthread_once_t __gthread_once_t;
 typedef pthread_mutex_t __gthread_mutex_t;
 typedef pthread_mutex_t __gthread_recursive_mutex_t;
 
-#define __GTHREAD_ONCE_INIT pthread_once_init
+#define __GTHREAD_ONCE_INIT __gthrw_pthread_once_init
 
 #define __GTHREAD_MUTEX_INIT_FUNCTION __gthread_mutex_init_function
 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
 
-#define __GTHREAD_MUTEX_INIT_DEFAULT pthread_once_init
+#define __GTHREAD_MUTEX_INIT_DEFAULT __gthrw_pthread_once_init
 
 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+# define __gthrw(name) \
+  extern __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)))
+#else
+# define __gthrw_asmname(cname) __gthrw_asmnamep (__USER_LABEL_PREFIX__, cname)
+# define __gthrw_asmnamep(prefix, cname) __gthrw_string (prefix) cname
+# define __gthrw_string(x) #x
+# define __gthrw(name) \
+  extern __typeof(name) __gthrw_ ## name __asm (__gthrw_asmname (#name))
+#endif
 
-#pragma weak pthread_once
-#pragma weak pthread_once_init
-#pragma weak pthread_keycreate
-#pragma weak pthread_key_delete
-#pragma weak pthread_getspecific
-#pragma weak pthread_setspecific
-#pragma weak pthread_create
-#pragma weak pthread_mutex_init
-#pragma weak pthread_mutex_lock
-#pragma weak pthread_mutex_trylock
-#pragma weak pthread_mutex_unlock
-#pragma weak pthread_mutexattr_create
-#pragma weak pthread_mutexattr_setkind_np
-#pragma weak pthread_mutexattr_delete
+__gthrw(pthread_once);
+__gthrw(pthread_once_init);
+__gthrw(pthread_keycreate);
+__gthrw(pthread_key_delete);
+__gthrw(pthread_getspecific);
+__gthrw(pthread_setspecific);
+__gthrw(pthread_create);
+__gthrw(pthread_mutex_init);
+__gthrw(pthread_mutex_lock);
+__gthrw(pthread_mutex_trylock);
+__gthrw(pthread_mutex_unlock);
+__gthrw(pthread_mutexattr_create);
+__gthrw(pthread_mutexattr_setkind_np);
+__gthrw(pthread_mutexattr_delete);
 
 #ifdef _LIBOBJC
 /* Objective-C.  */
-#pragma weak pthread_cond_broadcast
-#pragma weak pthread_cond_destroy
-#pragma weak pthread_cond_init
-#pragma weak pthread_cond_signal
-#pragma weak pthread_cond_wait
-#pragma weak pthread_exit
-#pragma weak pthread_getunique_np
-#pragma weak pthread_mutex_destroy
-#pragma weak pthread_self
-#pragma weak pthread_yield
+__gthrw(pthread_cond_broadcast);
+__gthrw(pthread_cond_destroy);
+__gthrw(pthread_cond_init);
+__gthrw(pthread_cond_signal);
+__gthrw(pthread_cond_wait);
+__gthrw(pthread_exit);
+__gthrw(pthread_getunique_np);
+__gthrw(pthread_mutex_destroy);
+__gthrw(pthread_self);
+__gthrw(pthread_yield);
 #endif
 
+#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+
 static inline int
 __gthread_active_p (void)
 {
-  static void *const __gthread_active_ptr = (void *) &pthread_create;
+  static void *const __gthread_active_ptr = (void *) &__gthrw_pthread_create;
   return __gthread_active_ptr != 0;
 }
 
@@ -125,7 +137,7 @@ __gthread_objc_init_thread_system (void)
 {
   if (__gthread_active_p ())
     /* Initialize the thread storage key.  */
-    return pthread_keycreate (&_objc_thread_storage, NULL);
+    return __gthrw_pthread_keycreate (&_objc_thread_storage, NULL);
   else
     return -1;
 }
@@ -152,7 +164,7 @@ __gthread_objc_thread_detach (void (*func)(void *), void *arg)
   if (!__gthread_active_p ())
     return NULL;
 
-  if (!(pthread_create (&new_thread_handle, pthread_attr_default,
+  if (!(__gthrw_pthread_create (&new_thread_handle, pthread_attr_default,
 			(void *) func, arg)))
     {
       /* ??? May not work! (64bit) */
@@ -189,7 +201,7 @@ __gthread_objc_thread_set_priority (int priority)
     }
 
   /* Change the priority.  */
-  if (pthread_setprio (pthread_self (), sys_priority) >= 0)
+  if (pthread_setprio (__gthrw_pthread_self (), sys_priority) >= 0)
     return 0;
   else
     /* Failed */
@@ -204,7 +216,7 @@ __gthread_objc_thread_get_priority (void)
 
   if (__gthread_active_p ())
     {
-      if ((sys_priority = pthread_getprio (pthread_self ())) >= 0)
+      if ((sys_priority = pthread_getprio (__gthrw_pthread_self ())) >= 0)
 	{
 	  if (sys_priority >= PRI_FG_MIN_NP
 	      && sys_priority <= PRI_FG_MAX_NP)
@@ -227,7 +239,7 @@ static inline void
 __gthread_objc_thread_yield (void)
 {
   if (__gthread_active_p ())
-    pthread_yield ();
+    __gthrw_pthread_yield ();
 }
 
 /* Terminate the current thread.  */
@@ -236,7 +248,7 @@ __gthread_objc_thread_exit (void)
 {
   if (__gthread_active_p ())
     /* exit the thread */
-    pthread_exit (&__objc_thread_exit_status);
+    __gthrw_pthread_exit (&__objc_thread_exit_status);
 
   /* Failed if we reached here */
   return -1;
@@ -248,9 +260,9 @@ __gthread_objc_thread_id (void)
 {
   if (__gthread_active_p ())
     {
-      pthread_t self = pthread_self ();
+      pthread_t self = __gthrw_pthread_self ();
 
-      return (objc_thread_t) pthread_getunique_np (&self);
+      return (objc_thread_t) __gthrw_pthread_getunique_np (&self);
     }
   else
     return (objc_thread_t) 1;
@@ -261,7 +273,7 @@ static inline int
 __gthread_objc_thread_set_data (void *value)
 {
   if (__gthread_active_p ())
-    return pthread_setspecific (_objc_thread_storage, value);
+    return __gthrw_pthread_setspecific (_objc_thread_storage, value);
   else
     {
       thread_local_storage = value;
@@ -277,7 +289,7 @@ __gthread_objc_thread_get_data (void)
 
   if (__gthread_active_p ())
     {
-      if (!(pthread_getspecific (_objc_thread_storage, &value)))
+      if (!(__gthrw_pthread_getspecific (_objc_thread_storage, &value)))
 	return value;
 
       return NULL;
@@ -296,7 +308,7 @@ __gthread_objc_mutex_allocate (objc_mutex_t mutex)
     {
       mutex->backend = objc_malloc (sizeof (pthread_mutex_t));
 
-      if (pthread_mutex_init ((pthread_mutex_t *) mutex->backend,
+      if (__gthrw_pthread_mutex_init ((pthread_mutex_t *) mutex->backend,
 			      pthread_mutexattr_default))
 	{
 	  objc_free (mutex->backend);
@@ -314,7 +326,7 @@ __gthread_objc_mutex_deallocate (objc_mutex_t mutex)
 {
   if (__gthread_active_p ())
     {
-      if (pthread_mutex_destroy ((pthread_mutex_t *) mutex->backend))
+      if (__gthrw_pthread_mutex_destroy ((pthread_mutex_t *) mutex->backend))
 	return -1;
 
       objc_free (mutex->backend);
@@ -329,7 +341,7 @@ static inline int
 __gthread_objc_mutex_lock (objc_mutex_t mutex)
 {
   if (__gthread_active_p ())
-    return pthread_mutex_lock ((pthread_mutex_t *) mutex->backend);
+    return __gthrw_pthread_mutex_lock ((pthread_mutex_t *) mutex->backend);
   else
     return 0;
 }
@@ -339,7 +351,7 @@ static inline int
 __gthread_objc_mutex_trylock (objc_mutex_t mutex)
 {
   if (__gthread_active_p ()
-      && pthread_mutex_trylock ((pthread_mutex_t *) mutex->backend) != 1)
+      && __gthrw_pthread_mutex_trylock ((pthread_mutex_t *) mutex->backend) != 1)
     return -1;
 
   return 0;
@@ -350,7 +362,7 @@ static inline int
 __gthread_objc_mutex_unlock (objc_mutex_t mutex)
 {
   if (__gthread_active_p ())
-    return pthread_mutex_unlock ((pthread_mutex_t *) mutex->backend);
+    return __gthrw_pthread_mutex_unlock ((pthread_mutex_t *) mutex->backend);
   else
     return 0;
 }
@@ -418,7 +430,7 @@ static inline int
 __gthread_once (__gthread_once_t *once, void (*func) (void))
 {
   if (__gthread_active_p ())
-    return pthread_once (once, func);
+    return __gthrw_pthread_once (once, func);
   else
     return -1;
 }
@@ -426,7 +438,7 @@ __gthread_once (__gthread_once_t *once, void (*func) (void))
 static inline int
 __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
 {
-  return pthread_keycreate (key, dtor);
+  return __gthrw_pthread_keycreate (key, dtor);
 }
 
 static inline int
@@ -440,7 +452,7 @@ static inline void *
 __gthread_getspecific (__gthread_key_t key)
 {
   void *ptr;
-  if (pthread_getspecific (key, &ptr) == 0)
+  if (__gthrw_pthread_getspecific (key, &ptr) == 0)
     return ptr;
   else
     return 0;
@@ -449,21 +461,21 @@ __gthread_getspecific (__gthread_key_t key)
 static inline int
 __gthread_setspecific (__gthread_key_t key, const void *ptr)
 {
-  return pthread_setspecific (key, (void *) ptr);
+  return __gthrw_pthread_setspecific (key, (void *) ptr);
 }
 
 static inline void
 __gthread_mutex_init_function (__gthread_mutex_t *mutex)
 {
   if (__gthread_active_p ())
-    pthread_mutex_init (mutex, pthread_mutexattr_default);
+    __gthrw_pthread_mutex_init (mutex, pthread_mutexattr_default);
 }
 
 static inline int
 __gthread_mutex_lock (__gthread_mutex_t *mutex)
 {
   if (__gthread_active_p ())
-    return pthread_mutex_lock (mutex);
+    return __gthrw_pthread_mutex_lock (mutex);
   else
     return 0;
 }
@@ -472,7 +484,7 @@ static inline int
 __gthread_mutex_trylock (__gthread_mutex_t *mutex)
 {
   if (__gthread_active_p ())
-    return pthread_mutex_trylock (mutex);
+    return __gthrw_pthread_mutex_trylock (mutex);
   else
     return 0;
 }
@@ -481,7 +493,7 @@ static inline int
 __gthread_mutex_unlock (__gthread_mutex_t *mutex)
 {
   if (__gthread_active_p ())
-    return pthread_mutex_unlock (mutex);
+    return __gthrw_pthread_mutex_unlock (mutex);
   else
     return 0;
 }
@@ -494,13 +506,13 @@ __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
       pthread_mutexattr_t attr;
       int r;
 
-      r = pthread_mutexattr_create (&attr);
+      r = __gthrw_pthread_mutexattr_create (&attr);
       if (!r)
-	r = pthread_mutexattr_setkind_np (&attr, MUTEX_RECURSIVE_NP);
+	r = __gthrw_pthread_mutexattr_setkind_np (&attr, MUTEX_RECURSIVE_NP);
       if (!r)
-	r = pthread_mutex_init (mutex, attr);
+	r = __gthrw_pthread_mutex_init (mutex, attr);
       if (!r)
-	r = pthread_mutexattr_delete (&attr);
+	r = __gthrw_pthread_mutexattr_delete (&attr);
       return r;
     }
 }
diff --git a/gcc/gthr-posix.h b/gcc/gthr-posix.h
index 355b584..d022c9f 100644
--- a/gcc/gthr-posix.h
+++ b/gcc/gthr-posix.h
@@ -59,55 +59,66 @@ typedef pthread_mutex_t __gthread_recursive_mutex_t;
 #endif
 
 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+# define __gthrw(name) \
+  extern __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)))
+#else
+# define __gthrw_asmname(cname) __gthrw_asmnamep (__USER_LABEL_PREFIX__, cname)
+# define __gthrw_asmnamep(prefix, cname) __gthrw_string (prefix) cname
+# define __gthrw_string(x) #x
+# define __gthrw(name) \
+  extern __typeof(name) __gthrw_ ## name __asm (__gthrw_asmname (#name))
+#endif
 
-#pragma weak pthread_once
-#pragma weak pthread_key_create
-#pragma weak pthread_key_delete
-#pragma weak pthread_getspecific
-#pragma weak pthread_setspecific
-#pragma weak pthread_create
-#pragma weak pthread_cancel
+__gthrw(pthread_once);
+__gthrw(pthread_key_create);
+__gthrw(pthread_key_delete);
+__gthrw(pthread_getspecific);
+__gthrw(pthread_setspecific);
+__gthrw(pthread_create);
+__gthrw(pthread_cancel);
 
-#pragma weak pthread_mutex_lock
-#pragma weak pthread_mutex_trylock
-#pragma weak pthread_mutex_unlock
-#pragma weak pthread_mutexattr_init
-#pragma weak pthread_mutexattr_settype
-#pragma weak pthread_mutexattr_destroy
+__gthrw(pthread_mutex_lock);
+__gthrw(pthread_mutex_trylock);
+__gthrw(pthread_mutex_unlock);
+__gthrw(pthread_mutexattr_init);
+__gthrw(pthread_mutexattr_settype);
+__gthrw(pthread_mutexattr_destroy);
 
-#pragma weak pthread_mutex_init
+__gthrw(pthread_mutex_init);
 
 #if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)
 /* Objective-C.  */
-#pragma weak pthread_cond_broadcast
-#pragma weak pthread_cond_destroy
-#pragma weak pthread_cond_init
-#pragma weak pthread_cond_signal
-#pragma weak pthread_cond_wait
-#pragma weak pthread_exit
-#pragma weak pthread_mutex_destroy
-#pragma weak pthread_self
+__gthrw(pthread_cond_broadcast);
+__gthrw(pthread_cond_destroy);
+__gthrw(pthread_cond_init);
+__gthrw(pthread_cond_signal);
+__gthrw(pthread_cond_wait);
+__gthrw(pthread_exit);
+__gthrw(pthread_mutex_destroy);
+__gthrw(pthread_self);
 #ifdef _POSIX_PRIORITY_SCHEDULING
 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
-#pragma weak sched_get_priority_max
-#pragma weak sched_get_priority_min
+__gthrw(sched_get_priority_max);
+__gthrw(sched_get_priority_min);
 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
 #endif /* _POSIX_PRIORITY_SCHEDULING */
-#pragma weak sched_yield
-#pragma weak pthread_attr_destroy
-#pragma weak pthread_attr_init
-#pragma weak pthread_attr_setdetachstate
+__gthrw(sched_yield);
+__gthrw(pthread_attr_destroy);
+__gthrw(pthread_attr_init);
+__gthrw(pthread_attr_setdetachstate);
 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
-#pragma weak pthread_getschedparam
-#pragma weak pthread_setschedparam
+__gthrw(pthread_getschedparam);
+__gthrw(pthread_setschedparam);
 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
 #endif /* _LIBOBJC || _LIBOBJC_WEAK */
 
+#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+
 static inline int
 __gthread_active_p (void)
 {
   static void *const __gthread_active_ptr 
-    = __extension__ (void *) &pthread_cancel;
+    = __extension__ (void *) &__gthrw_pthread_cancel;
   return __gthread_active_ptr != 0;
 }
 
@@ -146,13 +157,13 @@ __gthread_objc_init_thread_system (void)
   if (__gthread_active_p ())
     {
       /* Initialize the thread storage key.  */
-      if (pthread_key_create (&_objc_thread_storage, NULL) == 0)
+      if (__gthrw_pthread_key_create (&_objc_thread_storage, NULL) == 0)
 	{
 	  /* The normal default detach state for threads is
 	   * PTHREAD_CREATE_JOINABLE which causes threads to not die
 	   * when you think they should.  */
-	  if (pthread_attr_init (&_objc_thread_attribs) == 0
-	      && pthread_attr_setdetachstate (&_objc_thread_attribs,
+	  if (__gthrw_pthread_attr_init (&_objc_thread_attribs) == 0
+	      && __gthrw_pthread_attr_setdetachstate (&_objc_thread_attribs,
 					      PTHREAD_CREATE_DETACHED) == 0)
 	    return 0;
 	}
@@ -166,8 +177,8 @@ static inline int
 __gthread_objc_close_thread_system (void)
 {
   if (__gthread_active_p ()
-      && pthread_key_delete (_objc_thread_storage) == 0
-      && pthread_attr_destroy (&_objc_thread_attribs) == 0)
+      && __gthrw_pthread_key_delete (_objc_thread_storage) == 0
+      && __gthrw_pthread_attr_destroy (&_objc_thread_attribs) == 0)
     return 0;
 
   return -1;
@@ -185,7 +196,7 @@ __gthread_objc_thread_detach (void (*func)(void *), void *arg)
   if (!__gthread_active_p ())
     return NULL;
 
-  if (!(pthread_create (&new_thread_handle, NULL, (void *) func, arg)))
+  if (!(__gthrw_pthread_create (&new_thread_handle, NULL, (void *) func, arg)))
     thread_id = (objc_thread_t) new_thread_handle;
   else
     thread_id = NULL;
@@ -203,17 +214,17 @@ __gthread_objc_thread_set_priority (int priority)
     {
 #ifdef _POSIX_PRIORITY_SCHEDULING
 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
-      pthread_t thread_id = pthread_self ();
+      pthread_t thread_id = __gthrw_pthread_self ();
       int policy;
       struct sched_param params;
       int priority_min, priority_max;
 
-      if (pthread_getschedparam (thread_id, &policy, &params) == 0)
+      if (__gthrw_pthread_getschedparam (thread_id, &policy, &params) == 0)
 	{
-	  if ((priority_max = sched_get_priority_max (policy)) == -1)
+	  if ((priority_max = __gthrw_sched_get_priority_max (policy)) == -1)
 	    return -1;
 
-	  if ((priority_min = sched_get_priority_min (policy)) == -1)
+	  if ((priority_min = __gthrw_sched_get_priority_min (policy)) == -1)
 	    return -1;
 
 	  if (priority > priority_max)
@@ -227,7 +238,7 @@ __gthread_objc_thread_set_priority (int priority)
 	   * this should be a pointer to policy but pthread.h is universally
 	   * at odds with this.
 	   */
-	  if (pthread_setschedparam (thread_id, policy, &params) == 0)
+	  if (__gthrw_pthread_setschedparam (thread_id, policy, &params) == 0)
 	    return 0;
 	}
 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
@@ -247,7 +258,7 @@ __gthread_objc_thread_get_priority (void)
       int policy;
       struct sched_param params;
 
-      if (pthread_getschedparam (pthread_self (), &policy, &params) == 0)
+      if (__gthrw_pthread_getschedparam (__gthrw_pthread_self (), &policy, &params) == 0)
 	return params.sched_priority;
       else
 	return -1;
@@ -263,7 +274,7 @@ static inline void
 __gthread_objc_thread_yield (void)
 {
   if (__gthread_active_p ())
-    sched_yield ();
+    __gthrw_sched_yield ();
 }
 
 /* Terminate the current thread.  */
@@ -272,7 +283,7 @@ __gthread_objc_thread_exit (void)
 {
   if (__gthread_active_p ())
     /* exit the thread */
-    pthread_exit (&__objc_thread_exit_status);
+    __gthrw_pthread_exit (&__objc_thread_exit_status);
 
   /* Failed if we reached here */
   return -1;
@@ -283,7 +294,7 @@ static inline objc_thread_t
 __gthread_objc_thread_id (void)
 {
   if (__gthread_active_p ())
-    return (objc_thread_t) pthread_self ();
+    return (objc_thread_t) __gthrw_pthread_self ();
   else
     return (objc_thread_t) 1;
 }
@@ -293,7 +304,7 @@ static inline int
 __gthread_objc_thread_set_data (void *value)
 {
   if (__gthread_active_p ())
-    return pthread_setspecific (_objc_thread_storage, value);
+    return __gthrw_pthread_setspecific (_objc_thread_storage, value);
   else
     {
       thread_local_storage = value;
@@ -306,7 +317,7 @@ static inline void *
 __gthread_objc_thread_get_data (void)
 {
   if (__gthread_active_p ())
-    return pthread_getspecific (_objc_thread_storage);
+    return __gthrw_pthread_getspecific (_objc_thread_storage);
   else
     return thread_local_storage;
 }
@@ -321,7 +332,7 @@ __gthread_objc_mutex_allocate (objc_mutex_t mutex)
     {
       mutex->backend = objc_malloc (sizeof (pthread_mutex_t));
 
-      if (pthread_mutex_init ((pthread_mutex_t *) mutex->backend, NULL))
+      if (__gthrw_pthread_mutex_init ((pthread_mutex_t *) mutex->backend, NULL))
 	{
 	  objc_free (mutex->backend);
 	  mutex->backend = NULL;
@@ -342,18 +353,18 @@ __gthread_objc_mutex_deallocate (objc_mutex_t mutex)
 
       /*
        * Posix Threads specifically require that the thread be unlocked
-       * for pthread_mutex_destroy to work.
+       * for __gthrw_pthread_mutex_destroy to work.
        */
 
       do
 	{
-	  count = pthread_mutex_unlock ((pthread_mutex_t *) mutex->backend);
+	  count = __gthrw_pthread_mutex_unlock ((pthread_mutex_t *) mutex->backend);
 	  if (count < 0)
 	    return -1;
 	}
       while (count);
 
-      if (pthread_mutex_destroy ((pthread_mutex_t *) mutex->backend))
+      if (__gthrw_pthread_mutex_destroy ((pthread_mutex_t *) mutex->backend))
 	return -1;
 
       objc_free (mutex->backend);
@@ -367,7 +378,7 @@ static inline int
 __gthread_objc_mutex_lock (objc_mutex_t mutex)
 {
   if (__gthread_active_p ()
-      && pthread_mutex_lock ((pthread_mutex_t *) mutex->backend) != 0)
+      && __gthrw_pthread_mutex_lock ((pthread_mutex_t *) mutex->backend) != 0)
     {
       return -1;
     }
@@ -380,7 +391,7 @@ static inline int
 __gthread_objc_mutex_trylock (objc_mutex_t mutex)
 {
   if (__gthread_active_p ()
-      && pthread_mutex_trylock ((pthread_mutex_t *) mutex->backend) != 0)
+      && __gthrw_pthread_mutex_trylock ((pthread_mutex_t *) mutex->backend) != 0)
     {
       return -1;
     }
@@ -393,7 +404,7 @@ static inline int
 __gthread_objc_mutex_unlock (objc_mutex_t mutex)
 {
   if (__gthread_active_p ()
-      && pthread_mutex_unlock ((pthread_mutex_t *) mutex->backend) != 0)
+      && __gthrw_pthread_mutex_unlock ((pthread_mutex_t *) mutex->backend) != 0)
     {
       return -1;
     }
@@ -411,7 +422,7 @@ __gthread_objc_condition_allocate (objc_condition_t condition)
     {
       condition->backend = objc_malloc (sizeof (pthread_cond_t));
 
-      if (pthread_cond_init ((pthread_cond_t *) condition->backend, NULL))
+      if (__gthrw_pthread_cond_init ((pthread_cond_t *) condition->backend, NULL))
 	{
 	  objc_free (condition->backend);
 	  condition->backend = NULL;
@@ -428,7 +439,7 @@ __gthread_objc_condition_deallocate (objc_condition_t condition)
 {
   if (__gthread_active_p ())
     {
-      if (pthread_cond_destroy ((pthread_cond_t *) condition->backend))
+      if (__gthrw_pthread_cond_destroy ((pthread_cond_t *) condition->backend))
 	return -1;
 
       objc_free (condition->backend);
@@ -442,7 +453,7 @@ static inline int
 __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
 {
   if (__gthread_active_p ())
-    return pthread_cond_wait ((pthread_cond_t *) condition->backend,
+    return __gthrw_pthread_cond_wait ((pthread_cond_t *) condition->backend,
 			      (pthread_mutex_t *) mutex->backend);
   else
     return 0;
@@ -453,7 +464,7 @@ static inline int
 __gthread_objc_condition_broadcast (objc_condition_t condition)
 {
   if (__gthread_active_p ())
-    return pthread_cond_broadcast ((pthread_cond_t *) condition->backend);
+    return __gthrw_pthread_cond_broadcast ((pthread_cond_t *) condition->backend);
   else
     return 0;
 }
@@ -463,7 +474,7 @@ static inline int
 __gthread_objc_condition_signal (objc_condition_t condition)
 {
   if (__gthread_active_p ())
-    return pthread_cond_signal ((pthread_cond_t *) condition->backend);
+    return __gthrw_pthread_cond_signal ((pthread_cond_t *) condition->backend);
   else
     return 0;
 }
@@ -474,7 +485,7 @@ static inline int
 __gthread_once (__gthread_once_t *once, void (*func) (void))
 {
   if (__gthread_active_p ())
-    return pthread_once (once, func);
+    return __gthrw_pthread_once (once, func);
   else
     return -1;
 }
@@ -482,32 +493,32 @@ __gthread_once (__gthread_once_t *once, void (*func) (void))
 static inline int
 __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
 {
-  return pthread_key_create (key, dtor);
+  return __gthrw_pthread_key_create (key, dtor);
 }
 
 static inline int
 __gthread_key_delete (__gthread_key_t key)
 {
-  return pthread_key_delete (key);
+  return __gthrw_pthread_key_delete (key);
 }
 
 static inline void *
 __gthread_getspecific (__gthread_key_t key)
 {
-  return pthread_getspecific (key);
+  return __gthrw_pthread_getspecific (key);
 }
 
 static inline int
 __gthread_setspecific (__gthread_key_t key, const void *ptr)
 {
-  return pthread_setspecific (key, ptr);
+  return __gthrw_pthread_setspecific (key, ptr);
 }
 
 static inline int
 __gthread_mutex_lock (__gthread_mutex_t *mutex)
 {
   if (__gthread_active_p ())
-    return pthread_mutex_lock (mutex);
+    return __gthrw_pthread_mutex_lock (mutex);
   else
     return 0;
 }
@@ -516,7 +527,7 @@ static inline int
 __gthread_mutex_trylock (__gthread_mutex_t *mutex)
 {
   if (__gthread_active_p ())
-    return pthread_mutex_trylock (mutex);
+    return __gthrw_pthread_mutex_trylock (mutex);
   else
     return 0;
 }
@@ -525,7 +536,7 @@ static inline int
 __gthread_mutex_unlock (__gthread_mutex_t *mutex)
 {
   if (__gthread_active_p ())
-    return pthread_mutex_unlock (mutex);
+    return __gthrw_pthread_mutex_unlock (mutex);
   else
     return 0;
 }
@@ -539,13 +550,13 @@ __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
       pthread_mutexattr_t attr;
       int r;
 
-      r = pthread_mutexattr_init (&attr);
+      r = __gthrw_pthread_mutexattr_init (&attr);
       if (!r)
-	r = pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE);
+	r = __gthrw_pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE);
       if (!r)
-	r = pthread_mutex_init (mutex, &attr);
+	r = __gthrw_pthread_mutex_init (mutex, &attr);
       if (!r)
-	r = pthread_mutexattr_destroy (&attr);
+	r = __gthrw_pthread_mutexattr_destroy (&attr);
       return r;
     }
   return 0;
diff --git a/gcc/gthr-posix95.h b/gcc/gthr-posix95.h
index 3e78ea6..87da704 100644
--- a/gcc/gthr-posix95.h
+++ b/gcc/gthr-posix95.h
@@ -57,56 +57,67 @@ typedef struct {
 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
 
 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+# define __gthrw(name) \
+  extern __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)))
+#else
+# define __gthrw_asmname(cname) __gthrw_asmnamep (__USER_LABEL_PREFIX__, cname)
+# define __gthrw_asmnamep(prefix, cname) __gthrw_string (prefix) cname
+# define __gthrw_string(x) #x
+# define __gthrw(name) \
+  extern __typeof(name) __gthrw_ ## name __asm (__gthrw_asmname (#name))
+#endif
 
-#pragma weak pthread_once
-#pragma weak pthread_key_create
-#pragma weak pthread_key_delete
-#pragma weak pthread_getspecific
-#pragma weak pthread_setspecific
-#pragma weak pthread_create
-#pragma weak pthread_cancel
-#pragma weak pthread_self
+__gthrw(pthread_once);
+__gthrw(pthread_key_create);
+__gthrw(pthread_key_delete);
+__gthrw(pthread_getspecific);
+__gthrw(pthread_setspecific);
+__gthrw(pthread_create);
+__gthrw(pthread_cancel);
+__gthrw(pthread_self);
 
-#pragma weak pthread_mutex_lock
-#pragma weak pthread_mutex_trylock
-#pragma weak pthread_mutex_unlock
-#pragma weak pthread_mutexattr_init
-#pragma weak pthread_mutexattr_settype
-#pragma weak pthread_mutexattr_destroy
+__gthrw(pthread_mutex_lock);
+__gthrw(pthread_mutex_trylock);
+__gthrw(pthread_mutex_unlock);
+__gthrw(pthread_mutexattr_init);
+__gthrw(pthread_mutexattr_settype);
+__gthrw(pthread_mutexattr_destroy);
 
-#pragma weak pthread_mutex_init
+__gthrw(pthread_mutex_init);
 
 #if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)
 /* Objective-C.  */
-#pragma weak pthread_cond_broadcast
-#pragma weak pthread_cond_destroy
-#pragma weak pthread_cond_init
-#pragma weak pthread_cond_signal
-#pragma weak pthread_cond_wait
-#pragma weak pthread_exit
-#pragma weak pthread_mutex_destroy
-#pragma weak pthread_self
+__gthrw(pthread_cond_broadcast);
+__gthrw(pthread_cond_destroy);
+__gthrw(pthread_cond_init);
+__gthrw(pthread_cond_signal);
+__gthrw(pthread_cond_wait);
+__gthrw(pthread_exit);
+__gthrw(pthread_mutex_destroy);
+__gthrw(pthread_self);
 #ifdef _POSIX_PRIORITY_SCHEDULING
 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
-#pragma weak sched_get_priority_max
-#pragma weak sched_get_priority_min
+__gthrw(sched_get_priority_max);
+__gthrw(sched_get_priority_min);
 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
 #endif /* _POSIX_PRIORITY_SCHEDULING */
-#pragma weak sched_yield
-#pragma weak pthread_attr_destroy
-#pragma weak pthread_attr_init
-#pragma weak pthread_attr_setdetachstate
+__gthrw(sched_yield);
+__gthrw(pthread_attr_destroy);
+__gthrw(pthread_attr_init);
+__gthrw(pthread_attr_setdetachstate);
 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
-#pragma weak pthread_getschedparam
-#pragma weak pthread_setschedparam
+__gthrw(pthread_getschedparam);
+__gthrw(pthread_setschedparam);
 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
 #endif /* _LIBOBJC || _LIBOBJC_WEAK */
 
+#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+
 static inline int
 __gthread_active_p (void)
 {
   static void *const __gthread_active_ptr 
-    = __extension__ (void *) &pthread_cancel;
+    = __extension__ (void *) &__gthrw_pthread_cancel;
   return __gthread_active_ptr != 0;
 }
 
@@ -145,13 +156,13 @@ __gthread_objc_init_thread_system (void)
   if (__gthread_active_p ())
     {
       /* Initialize the thread storage key.  */
-      if (pthread_key_create (&_objc_thread_storage, NULL) == 0)
+      if (__gthrw_pthread_key_create (&_objc_thread_storage, NULL) == 0)
 	{
 	  /* The normal default detach state for threads is
 	   * PTHREAD_CREATE_JOINABLE which causes threads to not die
 	   * when you think they should.  */
-	  if (pthread_attr_init (&_objc_thread_attribs) == 0
-	      && pthread_attr_setdetachstate (&_objc_thread_attribs,
+	  if (__gthrw_pthread_attr_init (&_objc_thread_attribs) == 0
+	      && __gthrw_pthread_attr_setdetachstate (&_objc_thread_attribs,
 					      PTHREAD_CREATE_DETACHED) == 0)
 	    return 0;
 	}
@@ -165,8 +176,8 @@ static inline int
 __gthread_objc_close_thread_system (void)
 {
   if (__gthread_active_p ()
-      && pthread_key_delete (_objc_thread_storage) == 0
-      && pthread_attr_destroy (&_objc_thread_attribs) == 0)
+      && __gthrw_pthread_key_delete (_objc_thread_storage) == 0
+      && __gthrw_pthread_attr_destroy (&_objc_thread_attribs) == 0)
     return 0;
 
   return -1;
@@ -184,7 +195,7 @@ __gthread_objc_thread_detach (void (*func)(void *), void *arg)
   if (!__gthread_active_p ())
     return NULL;
 
-  if (!(pthread_create (&new_thread_handle, NULL, (void *) func, arg)))
+  if (!(__gthrw_pthread_create (&new_thread_handle, NULL, (void *) func, arg)))
     thread_id = (objc_thread_t) new_thread_handle;
   else
     thread_id = NULL;
@@ -202,17 +213,17 @@ __gthread_objc_thread_set_priority (int priority)
     {
 #ifdef _POSIX_PRIORITY_SCHEDULING
 #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
-      pthread_t thread_id = pthread_self ();
+      pthread_t thread_id = __gthrw_pthread_self ();
       int policy;
       struct sched_param params;
       int priority_min, priority_max;
 
-      if (pthread_getschedparam (thread_id, &policy, &params) == 0)
+      if (__gthrw_pthread_getschedparam (thread_id, &policy, &params) == 0)
 	{
-	  if ((priority_max = sched_get_priority_max (policy)) == -1)
+	  if ((priority_max = __gthrw_sched_get_priority_max (policy)) == -1)
 	    return -1;
 
-	  if ((priority_min = sched_get_priority_min (policy)) == -1)
+	  if ((priority_min = __gthrw_sched_get_priority_min (policy)) == -1)
 	    return -1;
 
 	  if (priority > priority_max)
@@ -226,7 +237,7 @@ __gthread_objc_thread_set_priority (int priority)
 	   * this should be a pointer to policy but pthread.h is universally
 	   * at odds with this.
 	   */
-	  if (pthread_setschedparam (thread_id, policy, &params) == 0)
+	  if (__gthrw_pthread_setschedparam (thread_id, policy, &params) == 0)
 	    return 0;
 	}
 #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
@@ -246,7 +257,7 @@ __gthread_objc_thread_get_priority (void)
       int policy;
       struct sched_param params;
 
-      if (pthread_getschedparam (pthread_self (), &policy, &params) == 0)
+      if (__gthrw_pthread_getschedparam (__gthrw_pthread_self (), &policy, &params) == 0)
 	return params.sched_priority;
       else
 	return -1;
@@ -262,7 +273,7 @@ static inline void
 __gthread_objc_thread_yield (void)
 {
   if (__gthread_active_p ())
-    sched_yield ();
+    __gthrw_sched_yield ();
 }
 
 /* Terminate the current thread.  */
@@ -271,7 +282,7 @@ __gthread_objc_thread_exit (void)
 {
   if (__gthread_active_p ())
     /* exit the thread */
-    pthread_exit (&__objc_thread_exit_status);
+    __gthrw_pthread_exit (&__objc_thread_exit_status);
 
   /* Failed if we reached here */
   return -1;
@@ -282,7 +293,7 @@ static inline objc_thread_t
 __gthread_objc_thread_id (void)
 {
   if (__gthread_active_p ())
-    return (objc_thread_t) pthread_self ();
+    return (objc_thread_t) __gthrw_pthread_self ();
   else
     return (objc_thread_t) 1;
 }
@@ -292,7 +303,7 @@ static inline int
 __gthread_objc_thread_set_data (void *value)
 {
   if (__gthread_active_p ())
-    return pthread_setspecific (_objc_thread_storage, value);
+    return __gthrw_pthread_setspecific (_objc_thread_storage, value);
   else
     {
       thread_local_storage = value;
@@ -305,7 +316,7 @@ static inline void *
 __gthread_objc_thread_get_data (void)
 {
   if (__gthread_active_p ())
-    return pthread_getspecific (_objc_thread_storage);
+    return __gthrw_pthread_getspecific (_objc_thread_storage);
   else
     return thread_local_storage;
 }
@@ -320,7 +331,7 @@ __gthread_objc_mutex_allocate (objc_mutex_t mutex)
     {
       mutex->backend = objc_malloc (sizeof (pthread_mutex_t));
 
-      if (pthread_mutex_init ((pthread_mutex_t *) mutex->backend, NULL))
+      if (__gthrw_pthread_mutex_init ((pthread_mutex_t *) mutex->backend, NULL))
 	{
 	  objc_free (mutex->backend);
 	  mutex->backend = NULL;
@@ -341,18 +352,18 @@ __gthread_objc_mutex_deallocate (objc_mutex_t mutex)
 
       /*
        * Posix Threads specifically require that the thread be unlocked
-       * for pthread_mutex_destroy to work.
+       * for __gthrw_pthread_mutex_destroy to work.
        */
 
       do
 	{
-	  count = pthread_mutex_unlock ((pthread_mutex_t *) mutex->backend);
+	  count = __gthrw_pthread_mutex_unlock ((pthread_mutex_t *) mutex->backend);
 	  if (count < 0)
 	    return -1;
 	}
       while (count);
 
-      if (pthread_mutex_destroy ((pthread_mutex_t *) mutex->backend))
+      if (__gthrw_pthread_mutex_destroy ((pthread_mutex_t *) mutex->backend))
 	return -1;
 
       objc_free (mutex->backend);
@@ -366,7 +377,7 @@ static inline int
 __gthread_objc_mutex_lock (objc_mutex_t mutex)
 {
   if (__gthread_active_p ()
-      && pthread_mutex_lock ((pthread_mutex_t *) mutex->backend) != 0)
+      && __gthrw_pthread_mutex_lock ((pthread_mutex_t *) mutex->backend) != 0)
     {
       return -1;
     }
@@ -379,7 +390,7 @@ static inline int
 __gthread_objc_mutex_trylock (objc_mutex_t mutex)
 {
   if (__gthread_active_p ()
-      && pthread_mutex_trylock ((pthread_mutex_t *) mutex->backend) != 0)
+      && __gthrw_pthread_mutex_trylock ((pthread_mutex_t *) mutex->backend) != 0)
     {
       return -1;
     }
@@ -392,7 +403,7 @@ static inline int
 __gthread_objc_mutex_unlock (objc_mutex_t mutex)
 {
   if (__gthread_active_p ()
-      && pthread_mutex_unlock ((pthread_mutex_t *) mutex->backend) != 0)
+      && __gthrw_pthread_mutex_unlock ((pthread_mutex_t *) mutex->backend) != 0)
     {
       return -1;
     }
@@ -410,7 +421,7 @@ __gthread_objc_condition_allocate (objc_condition_t condition)
     {
       condition->backend = objc_malloc (sizeof (pthread_cond_t));
 
-      if (pthread_cond_init ((pthread_cond_t *) condition->backend, NULL))
+      if (__gthrw_pthread_cond_init ((pthread_cond_t *) condition->backend, NULL))
 	{
 	  objc_free (condition->backend);
 	  condition->backend = NULL;
@@ -427,7 +438,7 @@ __gthread_objc_condition_deallocate (objc_condition_t condition)
 {
   if (__gthread_active_p ())
     {
-      if (pthread_cond_destroy ((pthread_cond_t *) condition->backend))
+      if (__gthrw_pthread_cond_destroy ((pthread_cond_t *) condition->backend))
 	return -1;
 
       objc_free (condition->backend);
@@ -441,7 +452,7 @@ static inline int
 __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
 {
   if (__gthread_active_p ())
-    return pthread_cond_wait ((pthread_cond_t *) condition->backend,
+    return __gthrw_pthread_cond_wait ((pthread_cond_t *) condition->backend,
 			      (pthread_mutex_t *) mutex->backend);
   else
     return 0;
@@ -452,7 +463,7 @@ static inline int
 __gthread_objc_condition_broadcast (objc_condition_t condition)
 {
   if (__gthread_active_p ())
-    return pthread_cond_broadcast ((pthread_cond_t *) condition->backend);
+    return __gthrw_pthread_cond_broadcast ((pthread_cond_t *) condition->backend);
   else
     return 0;
 }
@@ -462,7 +473,7 @@ static inline int
 __gthread_objc_condition_signal (objc_condition_t condition)
 {
   if (__gthread_active_p ())
-    return pthread_cond_signal ((pthread_cond_t *) condition->backend);
+    return __gthrw_pthread_cond_signal ((pthread_cond_t *) condition->backend);
   else
     return 0;
 }
@@ -473,7 +484,7 @@ static inline int
 __gthread_once (__gthread_once_t *once, void (*func) (void))
 {
   if (__gthread_active_p ())
-    return pthread_once (once, func);
+    return __gthrw_pthread_once (once, func);
   else
     return -1;
 }
@@ -481,32 +492,32 @@ __gthread_once (__gthread_once_t *once, void (*func) (void))
 static inline int
 __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
 {
-  return pthread_key_create (key, dtor);
+  return __gthrw_pthread_key_create (key, dtor);
 }
 
 static inline int
 __gthread_key_delete (__gthread_key_t key)
 {
-  return pthread_key_delete (key);
+  return __gthrw_pthread_key_delete (key);
 }
 
 static inline void *
 __gthread_getspecific (__gthread_key_t key)
 {
-  return pthread_getspecific (key);
+  return __gthrw_pthread_getspecific (key);
 }
 
 static inline int
 __gthread_setspecific (__gthread_key_t key, const void *ptr)
 {
-  return pthread_setspecific (key, ptr);
+  return __gthrw_pthread_setspecific (key, ptr);
 }
 
 static inline int
 __gthread_mutex_lock (__gthread_mutex_t *mutex)
 {
   if (__gthread_active_p ())
-    return pthread_mutex_lock (mutex);
+    return __gthrw_pthread_mutex_lock (mutex);
   else
     return 0;
 }
@@ -515,7 +526,7 @@ static inline int
 __gthread_mutex_trylock (__gthread_mutex_t *mutex)
 {
   if (__gthread_active_p ())
-    return pthread_mutex_trylock (mutex);
+    return __gthrw_pthread_mutex_trylock (mutex);
   else
     return 0;
 }
@@ -524,7 +535,7 @@ static inline int
 __gthread_mutex_unlock (__gthread_mutex_t *mutex)
 {
   if (__gthread_active_p ())
-    return pthread_mutex_unlock (mutex);
+    return __gthrw_pthread_mutex_unlock (mutex);
   else
     return 0;
 }
@@ -534,7 +545,7 @@ __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
 {
   mutex->depth = 0;
   mutex->owner = (pthread_t) 0;
-  return pthread_mutex_init (&mutex->actual, NULL);
+  return __gthrw_pthread_mutex_init (&mutex->actual, NULL);
 }
 
 static inline int
@@ -542,11 +553,11 @@ __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
 {
   if (__gthread_active_p ())
     {
-      pthread_t me = pthread_self ();
+      pthread_t me = __gthrw_pthread_self ();
 
       if (mutex->owner != me)
 	{
-	  pthread_mutex_lock (&mutex->actual);
+	  __gthrw_pthread_mutex_lock (&mutex->actual);
 	  mutex->owner = me;
 	}
 
@@ -560,11 +571,11 @@ __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
 {
   if (__gthread_active_p ())
     {
-      pthread_t me = pthread_self ();
+      pthread_t me = __gthrw_pthread_self ();
 
       if (mutex->owner != me)
 	{
-	  if (pthread_mutex_trylock (&mutex->actual))
+	  if (__gthrw_pthread_mutex_trylock (&mutex->actual))
 	    return 1;
 	  mutex->owner = me;
 	}
@@ -582,7 +593,7 @@ __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
       if (--mutex->depth == 0)
 	{
 	   mutex->owner = (pthread_t) 0;
-	   pthread_mutex_unlock (&mutex->actual);
+	   __gthrw_pthread_mutex_unlock (&mutex->actual);
 	}
     }
   return 0;
diff --git a/gcc/gthr-solaris.h b/gcc/gthr-solaris.h
index e37c628..01757dc 100644
--- a/gcc/gthr-solaris.h
+++ b/gcc/gthr-solaris.h
@@ -1,6 +1,7 @@
 /* Threads compatibility routines for libgcc2 and libobjc.  */
 /* Compile this one with gcc.  */
-/* Copyright (C) 1997, 1999, 2000, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1999, 2000, 2004, 2005
+   Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -56,41 +57,52 @@ typedef struct {
 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
 
 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+# define __gthrw(name) \
+  extern __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)))
+#else
+# define __gthrw_asmname(cname) __gthrw_asmnamep (__USER_LABEL_PREFIX__, cname)
+# define __gthrw_asmnamep(prefix, cname) __gthrw_string (prefix) cname
+# define __gthrw_string(x) #x
+# define __gthrw(name) \
+  extern __typeof(name) __gthrw_ ## name __asm (__gthrw_asmname (#name))
+#endif
 
-#pragma weak thr_keycreate
-#pragma weak thr_getspecific
-#pragma weak thr_setspecific
-#pragma weak thr_create
+__gthrw(thr_keycreate);
+__gthrw(thr_getspecific);
+__gthrw(thr_setspecific);
+__gthrw(thr_create);
 
-#pragma weak mutex_lock
-#pragma weak mutex_trylock
-#pragma weak mutex_unlock
+__gthrw(mutex_lock);
+__gthrw(mutex_trylock);
+__gthrw(mutex_unlock);
 
 #ifdef _LIBOBJC
-#pragma weak thr_exit
-#pragma weak thr_keycreate
-#pragma weak thr_getprio
-#pragma weak thr_self
-#pragma weak thr_setprio
-#pragma weak thr_yield
-
-#pragma weak cond_init
-#pragma weak cond_destroy
-#pragma weak cond_wait
-#pragma weak cond_broadcast
-#pragma weak cond_signal
-
-#pragma weak mutex_init
-#pragma weak mutex_destroy
+__gthrw(thr_exit);
+__gthrw(thr_keycreate);
+__gthrw(thr_getprio);
+__gthrw(thr_self);
+__gthrw(thr_setprio);
+__gthrw(thr_yield);
+
+__gthrw(cond_init);
+__gthrw(cond_destroy);
+__gthrw(cond_wait);
+__gthrw(cond_broadcast);
+__gthrw(cond_signal);
+
+__gthrw(mutex_init);
+__gthrw(mutex_destroy);
 #endif
 
+#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+
 /* This will not actually work in Solaris 2.5, since libc contains
    dummy symbols of all thr_* routines.  */
 
 static inline int
 __gthread_active_p (void)
 {
-  static void *const __gthread_active_ptr = (void *) &thr_create;
+  static void *const __gthread_active_ptr = (void *) &__gthrw_thr_create;
   return __gthread_active_ptr != 0;
 }
 
@@ -120,7 +132,7 @@ __gthread_objc_init_thread_system (void)
 {
   /* Initialize the thread storage key.  */
   if (__gthread_active_p ()
-      && thr_keycreate (&_objc_thread_storage, NULL) == 0)
+      && __gthrw_thr_keycreate (&_objc_thread_storage, NULL) == 0)
     return 0;
 
   return -1;
@@ -148,7 +160,7 @@ __gthread_objc_thread_detach (void (*func)(void *), void *arg)
   if (!__gthread_active_p ())
     return NULL;
 
-  if (thr_create (NULL, 0, (void *) func, arg,
+  if (__gthrw_thr_create (NULL, 0, (void *) func, arg,
 		  THR_DETACHED | THR_NEW_LWP,
 		  &new_thread_id) == 0)
     thread_id = *(objc_thread_t *) &new_thread_id;
@@ -182,7 +194,7 @@ __gthread_objc_thread_set_priority (int priority)
     }
 
   /* Change priority */
-  if (thr_setprio (thr_self (), sys_priority) == 0)
+  if (__gthrw_thr_setprio (__gthrw_thr_self (), sys_priority) == 0)
     return 0;
   else
     return -1;
@@ -197,7 +209,7 @@ __gthread_objc_thread_get_priority (void)
   if (!__gthread_active_p ())
     return OBJC_THREAD_INTERACTIVE_PRIORITY;
 
-  if (thr_getprio (thr_self (), &sys_priority) == 0)
+  if (__gthrw_thr_getprio (__gthrw_thr_self (), &sys_priority) == 0)
     {
       if (sys_priority >= 250)
 	return OBJC_THREAD_INTERACTIVE_PRIORITY;
@@ -215,7 +227,7 @@ static inline void
 __gthread_objc_thread_yield (void)
 {
   if (__gthread_active_p ())
-    thr_yield ();
+    __gthrw_thr_yield ();
 }
 
 /* Terminate the current thread.  */
@@ -224,7 +236,7 @@ __gthread_objc_thread_exit (void)
 {
   if (__gthread_active_p ())
     /* exit the thread */
-    thr_exit (&__objc_thread_exit_status);
+    __gthrw_thr_exit (&__objc_thread_exit_status);
 
   /* Failed if we reached here */
   return -1;
@@ -235,7 +247,7 @@ static inline objc_thread_t
 __gthread_objc_thread_id (void)
 {
   if (__gthread_active_p ())
-    return (objc_thread_t) thr_self ();
+    return (objc_thread_t) __gthrw_thr_self ();
   else
     return (objc_thread_t) 1;
 }
@@ -246,7 +258,7 @@ __gthread_objc_thread_set_data (void *value)
 {
   if (__gthread_active_p ())
     {
-      if (thr_setspecific (_objc_thread_storage, value) == 0)
+      if (__gthrw_thr_setspecific (_objc_thread_storage, value) == 0)
 	return 0;
       else
 	return -1;
@@ -266,7 +278,7 @@ __gthread_objc_thread_get_data (void)
 
   if (__gthread_active_p ())
     {
-      if (thr_getspecific (_objc_thread_storage, &value) == 0)
+      if (__gthrw_thr_getspecific (_objc_thread_storage, &value) == 0)
 	return value;
       else
 	return NULL;
@@ -282,7 +294,7 @@ static inline int
 __gthread_objc_mutex_allocate (objc_mutex_t mutex)
 {
   if (__gthread_active_p ()
-      && mutex_init ((mutex_t *) (&(mutex->backend)), USYNC_THREAD, 0))
+      && __gthrw_mutex_init ((mutex_t *) (&(mutex->backend)), USYNC_THREAD, 0))
     return -1;
 
   return 0;
@@ -293,7 +305,7 @@ static inline int
 __gthread_objc_mutex_deallocate (objc_mutex_t mutex)
 {
   if (__gthread_active_p ())
-    mutex_destroy ((mutex_t *) (&(mutex->backend)));
+    __gthrw_mutex_destroy ((mutex_t *) (&(mutex->backend)));
 
   return 0;
 }
@@ -303,7 +315,7 @@ static inline int
 __gthread_objc_mutex_lock (objc_mutex_t mutex)
 {
   if (__gthread_active_p ()
-      && mutex_lock ((mutex_t *) (&(mutex->backend))) != 0)
+      && __gthrw_mutex_lock ((mutex_t *) (&(mutex->backend))) != 0)
     return -1;
 
   return 0;
@@ -314,7 +326,7 @@ static inline int
 __gthread_objc_mutex_trylock (objc_mutex_t mutex)
 {
   if (__gthread_active_p ()
-      && mutex_trylock ((mutex_t *) (&(mutex->backend))) != 0)
+      && __gthrw_mutex_trylock ((mutex_t *) (&(mutex->backend))) != 0)
     return -1;
 
   return 0;
@@ -325,7 +337,7 @@ static inline int
 __gthread_objc_mutex_unlock (objc_mutex_t mutex)
 {
   if (__gthread_active_p ()
-      && mutex_unlock ((mutex_t *) (&(mutex->backend))) != 0)
+      && __gthrw_mutex_unlock ((mutex_t *) (&(mutex->backend))) != 0)
     return -1;
 
   return 0;
@@ -338,7 +350,7 @@ static inline int
 __gthread_objc_condition_allocate (objc_condition_t condition)
 {
   if (__gthread_active_p ())
-    return cond_init ((cond_t *) (&(condition->backend)), USYNC_THREAD,
+    return __gthrw_cond_init ((cond_t *) (&(condition->backend)), USYNC_THREAD,
 		      NULL);
   else
     return 0;
@@ -349,7 +361,7 @@ static inline int
 __gthread_objc_condition_deallocate (objc_condition_t condition)
 {
   if (__gthread_active_p ())
-    return cond_destroy ((cond_t *) (&(condition->backend)));
+    return __gthrw_cond_destroy ((cond_t *) (&(condition->backend)));
   else
     return 0;
 }
@@ -359,7 +371,7 @@ static inline int
 __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
 {
   if (__gthread_active_p ())
-    return cond_wait ((cond_t *) (&(condition->backend)),
+    return __gthrw_cond_wait ((cond_t *) (&(condition->backend)),
 		      (mutex_t *) (&(mutex->backend)));
   else
     return 0;
@@ -370,7 +382,7 @@ static inline int
 __gthread_objc_condition_broadcast (objc_condition_t condition)
 {
   if (__gthread_active_p ())
-    return cond_broadcast ((cond_t *) (&(condition->backend)));
+    return __gthrw_cond_broadcast ((cond_t *) (&(condition->backend)));
   else
     return 0;
 }
@@ -380,7 +392,7 @@ static inline int
 __gthread_objc_condition_signal (objc_condition_t condition)
 {
   if (__gthread_active_p ())
-    return cond_signal ((cond_t *) (&(condition->backend)));
+    return __gthrw_cond_signal ((cond_t *) (&(condition->backend)));
   else
     return 0;
 }
@@ -398,7 +410,7 @@ __gthread_once (__gthread_once_t *once, void (*func) (void))
 
   if (once->once == 0)
     {
-      int status = mutex_lock (&once->mutex);
+      int status = __gthrw_mutex_lock (&once->mutex);
       if (status != 0)
 	return status;
       if (once->once == 0)
@@ -406,7 +418,7 @@ __gthread_once (__gthread_once_t *once, void (*func) (void))
 	  (*func) ();
 	  once->once++;
 	}
-      mutex_unlock (&once->mutex);
+      __gthrw_mutex_unlock (&once->mutex);
     }
   return 0;
 }
@@ -417,7 +429,7 @@ __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
   /* Solaris 2.5 contains thr_* routines no-op in libc, so test if we actually
      got a reasonable key value, and if not, fail.  */
   *key = (__gthread_key_t)-1;
-  if (thr_keycreate (key, dtor) != 0 || *key == (__gthread_key_t)-1)
+  if (__gthrw_thr_keycreate (key, dtor) != 0 || *key == (__gthread_key_t)-1)
     return -1;
   else
     return 0;
@@ -434,7 +446,7 @@ static inline void *
 __gthread_getspecific (__gthread_key_t key)
 {
   void *ptr;
-  if (thr_getspecific (key, &ptr) == 0)
+  if (__gthrw_thr_getspecific (key, &ptr) == 0)
     return ptr;
   else
     return 0;
@@ -443,14 +455,14 @@ __gthread_getspecific (__gthread_key_t key)
 static inline int
 __gthread_setspecific (__gthread_key_t key, const void *ptr)
 {
-  return thr_setspecific (key, (void *) ptr);
+  return __gthrw_thr_setspecific (key, (void *) ptr);
 }
 
 static inline int
 __gthread_mutex_lock (__gthread_mutex_t *mutex)
 {
   if (__gthread_active_p ())
-    return mutex_lock (mutex);
+    return __gthrw_mutex_lock (mutex);
   else
     return 0;
 }
@@ -459,7 +471,7 @@ static inline int
 __gthread_mutex_trylock (__gthread_mutex_t *mutex)
 {
   if (__gthread_active_p ())
-    return mutex_trylock (mutex);
+    return __gthrw_mutex_trylock (mutex);
   else
     return 0;
 }
@@ -468,7 +480,7 @@ static inline int
 __gthread_mutex_unlock (__gthread_mutex_t *mutex)
 {
   if (__gthread_active_p ())
-    return mutex_unlock (mutex);
+    return __gthrw_mutex_unlock (mutex);
   else
     return 0;
 }
@@ -478,7 +490,7 @@ __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *mutex)
 {
   mutex->depth = 0;
   mutex->owner = (thread_t) 0;
-  return mutex_init (&mutex->actual, USYNC_THREAD, 0);
+  return __gthrw_mutex_init (&mutex->actual, USYNC_THREAD, 0);
 }
 
 static inline int
@@ -486,11 +498,11 @@ __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *mutex)
 {
   if (__gthread_active_p ())
     {
-      thread_t me = thr_self ();
+      thread_t me = __gthrw_thr_self ();
 
       if (mutex->owner != me)
 	{
-	  mutex_lock (&mutex->actual);
+	  __gthrw_mutex_lock (&mutex->actual);
 	  mutex->owner = me;
 	}
 
@@ -504,11 +516,11 @@ __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *mutex)
 {
   if (__gthread_active_p ())
     {
-      thread_t me = thr_self ();
+      thread_t me = __gthrw_thr_self ();
 
       if (mutex->owner != me)
 	{
-	  if (mutex_trylock (&mutex->actual))
+	  if (__gthrw_mutex_trylock (&mutex->actual))
 	    return 1;
 	  mutex->owner = me;
 	}
@@ -526,7 +538,7 @@ __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
       if (--mutex->depth == 0)
 	{
 	   mutex->owner = (thread_t) 0;
-	   mutex_unlock (&mutex->actual);
+	   __gthrw_mutex_unlock (&mutex->actual);
 	}
     }
   return 0;
diff --git a/gcc/gthr-tpf.h b/gcc/gthr-tpf.h
index a4e82d1..d54a6c8 100644
--- a/gcc/gthr-tpf.h
+++ b/gcc/gthr-tpf.h
@@ -1,6 +1,6 @@
 /* Threads compatibility routines for libgcc2 and libobjc.
    Compile this one with gcc.
-   Copyright (C) 2004 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2005 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -69,19 +69,26 @@ typedef pthread_mutex_t __gthread_recursive_mutex_t;
 #define __tpf_pthread_active() (CE2THRCPTR != NOTATHREAD)
 
 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+# define __gthrw(name) \
+  extern __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)))
+#else
+# define __gthrw_asmname(cname) __gthrw_asmnamep (__USER_LABEL_PREFIX__, cname)
+# define __gthrw_asmnamep(prefix, cname) __gthrw_string (prefix) cname
+# define __gthrw_string(x) #x
+# define __gthrw(name) \
+  extern __typeof(name) __gthrw_ ## name __asm (__gthrw_asmname (#name))
+#endif
 
-#pragma weak pthread_once
-#pragma weak pthread_key_create
-#pragma weak pthread_key_delete
-#pragma weak pthread_getspecific
-#pragma weak pthread_setspecific
-#pragma weak pthread_create
-
-#pragma weak pthread_mutex_lock
-#pragma weak pthread_mutex_trylock
-#pragma weak pthread_mutex_unlock
+__gthrw(pthread_once);
+__gthrw(pthread_key_create);
+__gthrw(pthread_key_delete);
+__gthrw(pthread_getspecific);
+__gthrw(pthread_setspecific);
+__gthrw(pthread_create);
 
-#endif /* SUPPORTS_WEAK */
+__gthrw(pthread_mutex_lock);
+__gthrw(pthread_mutex_trylock);
+__gthrw(pthread_mutex_unlock);
 
 static inline int
 __gthread_active_p (void)
@@ -93,7 +100,7 @@ static inline int
 __gthread_once (__gthread_once_t *once, void (*func) (void))
 {
   if (__tpf_pthread_active ())
-    return pthread_once (once, func);
+    return __gthrw_pthread_once (once, func);
   else
     return -1;
 }
@@ -102,7 +109,7 @@ static inline int
 __gthread_key_create (__gthread_key_t *key, void (*dtor) (void *))
 {
   if (__tpf_pthread_active ())
-    return pthread_key_create (key, dtor);
+    return __gthrw_pthread_key_create (key, dtor);
   else
     return -1;
 }
@@ -111,7 +118,7 @@ static inline int
 __gthread_key_delete (__gthread_key_t key)
 {
   if (__tpf_pthread_active ())
-    return pthread_key_delete (key);
+    return __gthrw_pthread_key_delete (key);
   else
     return -1;
 }
@@ -120,7 +127,7 @@ static inline void *
 __gthread_getspecific (__gthread_key_t key)
 {
   if (__tpf_pthread_active ())
-    return pthread_getspecific (key);
+    return __gthrw_pthread_getspecific (key);
   else
     return NULL;
 }
@@ -129,7 +136,7 @@ static inline int
 __gthread_setspecific (__gthread_key_t key, const void *ptr)
 {
   if (__tpf_pthread_active ())
-    return pthread_setspecific (key, ptr);
+    return __gthrw_pthread_setspecific (key, ptr);
   else
     return -1;
 }
@@ -138,7 +145,7 @@ static inline int
 __gthread_mutex_lock (__gthread_mutex_t *mutex)
 {
   if (__tpf_pthread_active ())
-    return pthread_mutex_lock (mutex);
+    return __gthrw_pthread_mutex_lock (mutex);
   else
     return 0;
 }
@@ -147,7 +154,7 @@ static inline int
 __gthread_mutex_trylock (__gthread_mutex_t *mutex)
 {
   if (__tpf_pthread_active ())
-    return pthread_mutex_trylock (mutex);
+    return __gthrw_pthread_mutex_trylock (mutex);
   else
     return 0;
 }
@@ -156,7 +163,7 @@ static inline int
 __gthread_mutex_unlock (__gthread_mutex_t *mutex)
 {
   if (__tpf_pthread_active ())
-    return pthread_mutex_unlock (mutex);
+    return __gthrw_pthread_mutex_unlock (mutex);
   else
     return 0;
 }
diff --git a/libobjc/ChangeLog b/libobjc/ChangeLog
index 08ffb2d..a6ff14f 100644
--- a/libobjc/ChangeLog
+++ b/libobjc/ChangeLog
@@ -1,3 +1,8 @@
+2005-11-09  Alexandre Oliva  <aoliva@redhat.com>
+
+	PR other/4372
+	* thr-objc.c (_XOPEN_SOURCE): Define.
+
 2005-10-07  Ulrich Weigand  <uweigand@de.ibm.com>
 
 	PR libobjc/23612
diff --git a/libobjc/thr-objc.c b/libobjc/thr-objc.c
index f2e8c39..a859e1e 100644
--- a/libobjc/thr-objc.c
+++ b/libobjc/thr-objc.c
@@ -24,6 +24,10 @@ Boston, MA 02110-1301, USA.  */
    covered by the GNU General Public License.  */
 
 #define _LIBOBJC
+/* The line below is needed for declarations of functions such as
+   pthread_mutexattr_settype, without which gthr-posix.h may fail to
+   compile within libobjc.  */
+#define _XOPEN_SOURCE 500
 #include "config.h"
 #include "tconfig.h"
 #include "coretypes.h"