gcc: fix hidden weak symbols by removing buggy gcc patch

We are noticing the presence of the following patch in various
openembedded gcc versions:

0024-PR-target-32219.patch

However, contrarily to its "Backport" status, that patch is
not upstream in gcc, and it breaks handling of start/stop automatic
weak hidden symbols we use in lttng-ust.

We are only experiencing problems on the various openembedded
compilers, but on no other distro (with same compiler versions),
which led us to suspect a buggy distro-specific gcc patch.

We've been testing with openembedded gcc-4.9.2-r0. Rebuilding the gcc
compiler with this patch removed fixes the lttng-ust issue.

Link: http://lists.openembedded.org/pipermail/openembedded-core/2016-January/116306.html
Link: http://lists.lttng.org/pipermail/lttng-dev/2014-May/023112.html
Link: https://gcc.gnu.org/ml/gcc-help/2014-05/msg00042.html
Link: http://cgit.openembedded.org/openembedded-core/commit/?id=3cb2b003db7371b3a47d02c08352a262e1e419b4
Link: https://sourceware.org/bugzilla/show_bug.cgi?id=15435

(From OE-Core rev: 3e98ba4d6c1d1e4919ce373ec031d41c2538f10b)

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 0 insertions, 1 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-4.9.inc b/meta/recipes-devtools/gcc/gcc-4.9.inc
index e9dfc504fd..736c95689a 100644
--- a/meta/recipes-devtools/gcc/gcc-4.9.inc
+++ b/meta/recipes-devtools/gcc/gcc-4.9.inc
@@ -47,7 +47,6 @@ SRC_URI = "\
     file://0021-gcc-disable-MASK_RELAX_PIC_CALLS-bit.patch \
     file://0022-COLLECT_GCC_OPTIONS.patch \
     file://0023-Use-the-defaults.h-in-B-instead-of-S-and-t-oe-in-B.patch \
-    file://0024-PR-target-32219.patch \
     file://0025-fortran-cross-compile-hack.patch \
     file://0026-libgcc-sjlj-check.patch \
     file://0027-cpp-honor-sysroot.patch \