[COMMITTED PATCH] Fix setenv.c diagnostic pragma to be compatible with GCC 4.6

[Roland McGrath]

2015-06-02  Roland McGrath  <roland@hack.frob.com>

	* stdlib/setenv.c [__GNUC__,__GNUC_MINOR__ < 4,7]: Use
	"-Wuninitialized" rather than "-Wmaybe-uninitialized" in pragma.

diff --git a/stdlib/setenv.c b/stdlib/setenv.c
index 184a8cd..b9e0ba8 100644
--- a/stdlib/setenv.c
+++ b/stdlib/setenv.c
@@ -24,7 +24,11 @@
    there seems to be no way to pacify GCC selectively, only for the
    place where it's needed.  Do not use DIAG_IGNORE_NEEDS_COMMENT
    here, as it's not defined yet.  */
-#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#if ((__GNUC__ << 16) + __GNUC_MINOR__) >= ((4 << 16) + 7)
+# pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#else
+# pragma GCC diagnostic ignored "-Wuninitialized"
+#endif
 
 #include <errno.h>
 #if !_LIBC