re PR bootstrap/52569 (bootstrap fails on x86_64-apple-darwin10 at revision 185261)

2012-03-13  Richard Guenther  <rguenther@suse.de>

	PR target/52569
	* unwind-dw2-fde.c: Make avoid-include-gthr.h hacks work again.

From-SVN: r185322

libgcc/ChangeLog

 2012-03-13  Richard Guenther  <rguenther@suse.de>
 
+	PR target/52569
+	* unwind-dw2-fde.c: Make avoid-include-gthr.h hacks work again.
+
+2012-03-13  Richard Guenther  <rguenther@suse.de>
+
 	* gthr-single.h (__GTHREAD_MUTEX_INIT_FUNCTION): Fix definition.
 
 2012-03-13  Richard Guenther  <rguenther@suse.de>

libgcc/unwind-dw2-fde.c

@@ -49,6 +49,7 @@ static struct object *seen_objects;
 static __gthread_mutex_t object_mutex = __GTHREAD_MUTEX_INIT;
 #define init_object_mutex_once()
 #else
+#ifdef __GTHREAD_MUTEX_INIT_FUNCTION
 static __gthread_mutex_t object_mutex;
 
 static void
@@ -63,6 +64,12 @@ init_object_mutex_once (void)
   static __gthread_once_t once = __GTHREAD_ONCE_INIT;
   __gthread_once (&once, init_object_mutex);
 }
+#else
+/* ???  Several targets include this file with stubbing parts of gthr.h
+   and expect no locking to be done.  */
+#define init_object_mutex_once()
+static __gthread_mutex_t object_mutex;
+#endif
 #endif
 
 /* Called from crtbegin.o to register the unwind info for an object.  */