[Patch] Fix glibc testing with GCC 4.9 compiler

[Steve Ellcey]

I was testing glibc on a machine with GCC 4.9.2 and the tests died due
to a warning in string/tester.c.  This routine has a DIAG_IGNORE for
-Wmemset-transposed-args at GCC 5.0 and above but this warning is also
given by my GCC 4.9.2 compiler.  This patch fixed the problem for me,
is it OK to check it in?

Steve Ellcey
sellcey@imgtec.com


2016-02-25  Steve Ellcey  <sellcey@imgtec.com>

	* string/tester.c (test_memset): Use -Wmemset-transposed-args for
	GCC 4.9.


diff --git a/string/tester.c b/string/tester.c
index 7c36591..208384b 100644
--- a/string/tester.c
+++ b/string/tester.c
@@ -1305,10 +1305,10 @@ test_memset (void)
   equal(one, "axxxefgh", 2);		/* Basic test. */
 
   DIAG_PUSH_NEEDS_COMMENT;
-#if __GNUC_PREREQ (5, 0)
-  /* GCC 5.0 warns about a zero-length memset because the arguments to memset
+#if __GNUC_PREREQ (4, 9)
+  /* GCC 4.9 warns about a zero-length memset because the arguments to memset
      may be in the wrong order.  But we really want to test this.  */
-  DIAG_IGNORE_NEEDS_COMMENT (5.0, "-Wmemset-transposed-args")
+  DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wmemset-transposed-args")
 #endif
   (void) memset(one+2, 'y', 0);
   equal(one, "axxxefgh", 3);		/* Zero-length set. */