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

Backport the upstream patch that fix a configure test breaked with gcc 4.9.x.

This patch must be removed with the next version bump.

Fixes:
http://autobuild.buildroot.net/results/f80/f8083f038d0efb7b5becf7810b6fcaf440fb8294/build-end.log

Signed-off-by: Romain Naour <romain.naour@openwide.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

diff --git a/package/oprofile/oprofile-003-configure-fix-test-for-synth-check-with-GCC-4.9.0.patch b/package/oprofile/oprofile-003-configure-fix-test-for-synth-check-with-GCC-4.9.0.patch
new file mode 100644 (file)
index 0000000..24bed98
--- /dev/null
+++ b/package/oprofile/oprofile-003-configure-fix-test-for-synth-check-with-GCC-4.9.0.patch
@@ -0,0 +1,45 @@
+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
+