C++11 explicitly forbids macros for bool, true and false.

gcc:
	* ginclude/stdbool.h: Do not define bool, true or false in C++11.

libstdc++-v3:
	* testsuite/18_support/headers/cstdbool/macros.cc: New.

From-SVN: r216679

gcc/ChangeLog

@@ -1,3 +1,7 @@
+2014-10-24  Jonathan Wakely  <jwakely@redhat.com>
+
+	* ginclude/stdbool.h: Do not define bool, true or false in C++11.
+
 2014-10-24  Charles Baylis  <charles.baylis@linaro.org>
 
 	* config/aarch64/arm_neon.h (__LD2_LANE_FUNC): Rewrite using builtins,

gcc/ginclude/stdbool.h

@@ -36,11 +36,15 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 
 #else /* __cplusplus */
 
-/* Supporting <stdbool.h> in C++ is a GCC extension.  */
+/* Supporting _Bool in C++ is a GCC extension.  */
 #define _Bool	bool
+
+#if __cplusplus < 201103L
+/* Defining these macros in C++98 is a GCC extension.  */
 #define bool	bool
 #define false	false
 #define true	true
+#endif
 
 #endif /* __cplusplus */
 

libstdc++-v3/ChangeLog

@@ -1,3 +1,7 @@
+2014-10-24  Jonathan Wakely  <jwakely@redhat.com>
+
+	* testsuite/18_support/headers/cstdbool/macros.cc: New.
+
 2014-10-24  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* include/bits/atomic_base.h: Avoid including <stdbool.h>.

libstdc++-v3/testsuite/18_support/headers/cstdbool/macros.cc

@@ -0,0 +1,37 @@
+// { dg-do compile }
+// { dg-options "-std=gnu++11" }
+
+// Copyright (C) 2012 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <cstdbool>
+
+#ifndef __bool_true_false_are_defined
+# error "The header <cstdbool> fails to define a macro named __bool_true_false_are_defined"
+#endif
+
+#ifdef bool
+# error "The header <cstdbool> defines a macro named bool"
+#endif
+
+#ifdef true
+# error "The header <cstdbool> defines a macro named true"
+#endif
+
+#ifdef false
+# error "The header <cstdbool> defines a macro named false"
+#endif