* All files with FSF copyright notices: Update copyright dates
	using scripts/update-copyrights.
	* locale/programs/charmap-kw.h: Regenerated.
	* locale/programs/locfile-kw.h: Likewise.

POSIX explicitly says that applications should check errno only after
failure, so the errno value can be clobbered on success as long as it
is not set to zero.

Changelog:
	[BZ #22611]
	* malloc/tst-realloc.c (do_test): Remove the test checking that errno
	is unchanged on success.

Quite a few tests include libc-internal.h just for the DIAG_* macros.
Split those macros to their own file, which can be included safely in
_ISOMAC mode.  I also moved ignore_value, since it seems logically
related, even though I didn't notice any tests needing it.

Also add -Wnonnull suppressions to two tests that _should_ have them,
but the error is masked when compiling against internal headers.

	* include/libc-diag.h: New file.  Define ignore_value,
	DIAG_PUSH_NEEDS_COMMENT, DIAG_POP_NEEDS_COMMENT,
	DIAG_IGNORE_NEEDS_COMMENT, and DIAG_IGNORE_Os_NEEDS_COMMENT here.

	* include/libc-internal.h: Definitions of above macros moved from
	here.  Include libc-diag.h.  Add copyright notice.

	* malloc/tst-malloc.c, malloc/tst-memcheck.c, malloc/tst-realloc.c
	* misc/tst-error1.c, posix/tst-dir.c, stdio-common/bug21.c
	* stdio-common/scanf14.c, stdio-common/scanf4.c, stdio-common/scanf7.c
	* stdio-common/test-vfprintf.c, stdio-common/tst-printf.c
	* stdio-common/tst-printfsz.c, stdio-common/tst-sprintf.c
	* stdio-common/tst-unlockedio.c, stdio-common/tstdiomisc.c
	* stdlib/bug-getcontext.c, string/tester.c, string/tst-endian.c
	* time/tst-strptime2.c, wcsmbs/tst-wcstof.c:
	Include libc-diag.h instead of libc-internal.h.

	* stdlib/tst-environ.c: Include libc-diag.h.  Suppress -Wnonnull for
	call to unsetenv (NULL).
	* nptl/tst-mutex1.c: Include libc-diag.h.  Suppress -Wnonnull for
	call to pthread_mutexattr_destroy (NULL).

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.

The current tests don't test the functionality of realloc in detail.
Add a new test for realloc that exercises some of the corner cases
that are not otherwise tested.

ChangeLog:

2013-09-09  Will Newton  <will.newton@linaro.org>

	* malloc/Makefile: Add tst-realloc to tests.
	* malloc/tst-realloc.c: New file.