Fix malloc/ tests for GCC 7 -Walloc-size-larger-than=.

GCC 7 has a -Walloc-size-larger-than= warning for allocations of half
the address space or more.  This causes errors building glibc tests
that deliberately test failure of very large allocations.  This patch
arranges for this warning to be ignored around the problematic
function calls.

Tested compilation for aarch64 (GCC mainline) with
build-many-glibcs.py; did execution testing for x86_64 (GCC 5).

	* malloc/tst-malloc.c: Include <libc-internal.h>.
	(do_test): Disable -Walloc-size-larger-than= around tests of
	malloc with negative sizes.
	* malloc/tst-mcheck.c: Include <libc-internal.h>.
	(do_test): Disable -Walloc-size-larger-than= around tests of
	malloc and realloc with negative sizes.
	* malloc/tst-realloc.c: Include <libc-internal.h>.
	(do_test): Disable -Walloc-size-larger-than= around tests of
	realloc with negative sizes.

1 files changed, 10 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 8770c65556..a3eacbb604 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,15 @@
 2017-01-04  Joseph Myers  <joseph@codesourcery.com>
 
+	* malloc/tst-malloc.c: Include <libc-internal.h>.
+	(do_test): Disable -Walloc-size-larger-than= around tests of
+	malloc with negative sizes.
+	* malloc/tst-mcheck.c: Include <libc-internal.h>.
+	(do_test): Disable -Walloc-size-larger-than= around tests of
+	malloc and realloc with negative sizes.
+	* malloc/tst-realloc.c: Include <libc-internal.h>.
+	(do_test): Disable -Walloc-size-larger-than= around tests of
+	realloc with negative sizes.
+
 	* math/libm-test.inc (TEST_COND_ibm128_libgcc): New macro.
 	(init_max_error) [TEST_COND_ibm128]: Increase maximum error
 	allowed to 16 ulps.