re PR c++/54249 ([C++11] No ::nullptr_t in header <stddef.h>)

2012-10-06  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/54249
	* ginclude/stddef.h: In C++11 mode declare nullptr_t in the global
	namespace.

/testsuite
2012-10-06  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/54249
	* g++.dg/cpp0x/stddef.C: New.

From-SVN: r192173

gcc/ChangeLog

+2012-10-06  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/54249
+	* ginclude/stddef.h: In C++11 mode declare nullptr_t in the global
+	namespace.
+
 2012-10-06  Jan Hubicka  <jh@suse.cz>
 
 	PR lto/53831
@@ -23,7 +29,7 @@
 
 2012-10-06  Jan Hubicka  <jh@suse.cz>
 
-	PR lto/54790 
+	PR lto/54790
 	* lto-streamer.h (lto_symtab_register_decl, lto_symtab_get_resolution,
 	lto_mark_nothrow_fndecl, lto_fixup_nothrow_decls): Remove.
 	* lto-symtab.c (lto_symtab_register_decl): Remove.

gcc/ginclude/stddef.h

@@ -427,6 +427,13 @@ typedef struct {
 #endif
 #endif /* C11 or C++11.  */
 
+#if defined(__cplusplus) && __cplusplus >= 201103L
+#ifndef _GXX_NULLPTR_T
+#define _GXX_NULLPTR_T
+  typedef decltype(nullptr) nullptr_t;
+#endif
+#endif /* C++11.  */
+
 #endif /* _STDDEF_H was defined this time */
 
 #endif /* !_STDDEF_H && !_STDDEF_H_ && !_ANSI_STDDEF_H && !__STDDEF_H__

gcc/testsuite/ChangeLog

+2012-10-06  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/54249
+	* g++.dg/cpp0x/stddef.C: New.
+
 2012-10-06  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/54832

gcc/testsuite/g++.dg/cpp0x/stddef.C

+// PR c++/54249
+// { dg-do compile { target c++11 } }
+
+#include <stddef.h>
+
+::nullptr_t n;