FINAL/OVERRIDE: Define to empty on g++ < 4.7

final/override were only implemented in g++ 4.7.

include/ChangeLog
2016-10-14  Pedro Alves  <palves@redhat.com>

	* ansidecl.h [__cplusplus >= 201103 && GCC_VERSION < 4007] (FINAL,
	OVERRIDE): Define as empty.
	[__cplusplus < 201103 && GCC_VERSION < 4007] (FINAL): Define as
	__final.
	[__cplusplus < 201103 && GCC_VERSION >= 4007] (OVERRIDE): Define as
	empty.

From-SVN: r241167

include/ChangeLog

 2016-10-14  Pedro Alves  <palves@redhat.com>
 
+	* ansidecl.h [__cplusplus >= 201103 && GCC_VERSION < 4007] (FINAL,
+	OVERRIDE): Define as empty.
+	[__cplusplus < 201103 && GCC_VERSION < 4007] (FINAL): Define as
+	__final.
+	[__cplusplus < 201103 && GCC_VERSION >= 4007] (OVERRIDE): Define as
+	empty.
+
+2016-10-14  Pedro Alves  <palves@redhat.com>
+
 	* ansidecl.h (GCC_FINAL): Delete.
 	(OVERRIDE, FINAL): New, moved from gcc/coretypes.h.
 

include/ansidecl.h

@@ -329,13 +329,23 @@ So instead we use the macro below and test it against specific values.  */
    this by default (actually GNU++14).  */
 
 #if __cplusplus >= 201103
-/* C++11 claims to be available: use it: */
-#define OVERRIDE override
-#define FINAL final
+/* C++11 claims to be available: use it.  final/override were only
+   implemented in 4.7, though.  */
+# if GCC_VERSION < 4007
+#  define OVERRIDE
+#  define FINAL
+# else
+#  define OVERRIDE override
+#  define FINAL final
+# endif
+#elif GCC_VERSION >= 4007
+/* G++ 4.7 supports __final in C++98.  */
+# define OVERRIDE
+# define FINAL __final
 #else
 /* No C++11 support; leave the macros empty: */
-#define OVERRIDE
-#define FINAL
+# define OVERRIDE
+# define FINAL
 #endif
 
 #ifdef __cplusplus