package/oprofile: fix configure test with gcc 4.9.x

From cc08b52f8376867121f22e166636779e2a1a6e48 Mon Sep 17 00:00:00 2001

From: Aaro Koskinen <aaro.koskinen@iki.fi>

Date: Mon, 12 May 2014 08:28:46 -0500

Subject: [PATCH 1/1] configure: fix test-for-synth check with GCC 4.9.0

With GCC 4.9.0 oprofile 0.9.9 build fails on non-PPC platfroms because

the "test-for-synth" configure check result is incorrect: There is a NULL

pointer dereference in the test program, so the compiler seems to optimize

the rest of the code away, and the test will always succeed regardless

whether powerpc_elf64_vec/bfd_elf64_powerpc_vec are present or not.

Fix by allocating the referred struct statically.

While at it, also include stdio.h to avoid a compiler warning.

[Romain: backport the patch to 0.9.9]

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>

Signed-off-by: Romain Naour <romain.naour@openwide.fr>

Conflicts:

	m4/binutils.m4

---

 m4/binutils.m4 | 6 ++++--

 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/m4/binutils.m4 b/m4/binutils.m4

index 25fb15a..3486488 100644

--- a/m4/binutils.m4

+++ b/m4/binutils.m4

@@ -27,8 +27,10 @@ if test "$OS" = "Linux"; then

 	AC_MSG_CHECKING([whether bfd_get_synthetic_symtab() exists in BFD library])

 	rm -f test-for-synth

 	AC_LANG_CONFTEST(

-		[AC_LANG_PROGRAM([[#include <bfd.h>]],

-			[[asymbol * synthsyms;	bfd * ibfd = 0; 

+		[AC_LANG_PROGRAM([[#include <bfd.h>]

+			[#include <stdio.h>]

+			[static bfd _ibfd;]],

+			[[asymbol * synthsyms;	bfd * ibfd = &_ibfd;

 			long synth_count = bfd_get_synthetic_symtab(ibfd, 0, 0, 0, 0, &synthsyms);

 			extern const bfd_target bfd_elf64_powerpc_vec;

 			extern const bfd_target bfd_elf64_powerpcle_vec;

-- 

1.9.3