mutex (once_flag): Construct __gthread_once_t in a temporary variable before…

mutex (once_flag): Construct __gthread_once_t in a temporary variable before assigning to _M_once...

2008-09-04  Chris Fairles  <chris.fairles@gmail.com>

        * include/std/mutex (once_flag): Construct __gthread_once_t in a
	temporary variable before assigning to _M_once to avoid initialization
	errors.

From-SVN: r139986

libstdc++-v3/ChangeLog

+2008-09-04  Chris Fairles  <chris.fairles@gmail.com>
+
+        * include/std/mutex (once_flag): Construct __gthread_once_t in a
+	temporary variable before assigning to _M_once to avoid initialization
+	errors. 
+
 2008-09-03  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* config/abi/pre/gnu.ver: Also export __once_functor_lock; tighten

libstdc++-v3/include/std/mutex

@@ -615,8 +615,10 @@ namespace std
     typedef __gthread_once_t __native_type;
 
     once_flag()
-    : _M_once(__GTHREAD_ONCE_INIT)
-    { }
+    {
+      __gthread_once_t __tmp = __GTHREAD_ONCE_INIT;
+      _M_once = __tmp;
+    }
     
     once_flag(const once_flag&) = delete;
     once_flag& operator=(const once_flag&) = delete;