re PR boehm-gc/34544 (pthread_default_stacksize_np failed.)

	PR boehm-gc/34544
	* gthr-posix.h (__gthread_start): Delete.
	(__gthread_active_init): Use pthread_default_stacksize_np instead of
	pthread_create to determine if hpux pthreads are active.
	* gthr-posix95.h (__gthread_start): Delete.
	(__gthread_active_init): Likewise use pthread_default_stacksize_np.

From-SVN: r163003

gcc/ChangeLog

+2010-08-08  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
+
+	PR boehm-gc/34544
+	* gthr-posix.h (__gthread_start): Delete.
+	(__gthread_active_init): Use pthread_default_stacksize_np instead of
+	pthread_create to determine if hpux pthreads are active.
+	* gthr-posix95.h (__gthread_start): Delete.
+	(__gthread_active_init): Likewise use pthread_default_stacksize_np.
+
 2010-08-08  Kai Tietz  <kai.tietz@onevision.com>
 
 	* config/i386/mingw32.h ((EXTRA_OS_CPP_BUILTINS): Define

gcc/gthr-posix.h

@@ -273,32 +273,18 @@ __gthread_active_p (void)
 
 static volatile int __gthread_active = -1;
 
-static void *
-__gthread_start (void *__arg __attribute__((unused)))
-{
-  return NULL;
-}
-
 static void __gthread_active_init (void) __attribute__((noinline));
 static void
 __gthread_active_init (void)
 {
   static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
-  pthread_t __t;
-  pthread_attr_t __a;
-  int __result;
+  size_t __s;
 
   __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
   if (__gthread_active < 0)
     {
-      __gthrw_(pthread_attr_init) (&__a);
-      __gthrw_(pthread_attr_setdetachstate) (&__a, PTHREAD_CREATE_DETACHED);
-      __result = __gthrw_(pthread_create) (&__t, &__a, __gthread_start, NULL);
-      if (__result != ENOSYS)
-	__gthread_active = 1;
-      else
-	__gthread_active = 0;
-      __gthrw_(pthread_attr_destroy) (&__a);
+      pthread_default_stacksize_np (0, &__s);
+      __gthread_active = __s ? 1 : 0;
     }
   __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
 }

gcc/gthr-posix95.h

@@ -197,32 +197,18 @@ __gthread_active_p (void)
 
 static volatile int __gthread_active = -1;
 
-static void *
-__gthread_start (void *arg __attribute__((unused)))
-{
-  return NULL;
-}
-
 static void __gthread_active_init (void) __attribute__((noinline));
 static void
 __gthread_active_init (void)
 {
   static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
-  pthread_t t;
-  pthread_attr_t a;
-  int result;
+  size_t __s;
 
   __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
   if (__gthread_active < 0)
     {
-      __gthrw_(pthread_attr_init) (&a);
-      __gthrw_(pthread_attr_setdetachstate) (&a, PTHREAD_CREATE_DETACHED);
-      result = __gthrw_(pthread_create) (&t, &a, __gthread_start, NULL);
-      if (result != ENOSYS)
-	__gthread_active = 1;
-      else
-	__gthread_active = 0;
-      __gthrw_(pthread_attr_destroy) (&a);
+      pthread_default_stacksize_np (0, &__s);
+      __gthread_active = __s ? 1 : 0;
     }
   __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
 }