[OE-core] [PATCH] Fix for gcc bug 61144
Peter Urbanec
openembedded-devel at urbanec.net
Fri Oct 10 16:40:20 UTC 2014
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61144 for details.
This patch is taken from the gcc repository and should be obsoleted by a
gcc release after 4.9.1
The problem is severe enough (at least from my point of view) to need
this patch until the next gcc release is available.
-------------- next part --------------
commit 03ae7912aadbf3b55b966a1367f07c7dbbddda80
Author: Peter Urbanec
Date: Fri Oct 10 00:03:28 2014 +1100
gcc: Patch for gcc bug 61144.
This fixes gcc bug 6144, which in my case exhibited itself as a kernel
module that failed to load. This was because static platform_data
structures were being corrupted with the optimiser being set to any
value other than -O0.
diff --git a/meta/recipes-devtools/gcc/gcc-4.9.inc b/meta/recipes-devtools/gcc/gcc-4.9.inc
index 25778bd..9a66cd2 100644
--- a/meta/recipes-devtools/gcc/gcc-4.9.inc
+++ b/meta/recipes-devtools/gcc/gcc-4.9.inc
@@ -70,6 +70,7 @@ SRC_URI = "\
file://0053-gcc-fix-segfault-from-calling-free-on-non-malloc-d-a.patch \
file://0054-gcc-Makefile.in-fix-parallel-building-failure.patch \
file://0055-PR-rtl-optimization-61801.patch \
+ file://0056-top-level-reorder_gcc-bug-61144.patch \
"
SRC_URI[md5sum] = "fddf71348546af523353bd43d34919c1"
SRC_URI[sha256sum] = "d334781a124ada6f38e63b545e2a3b8c2183049515a1abab6d513f109f1d717e"
diff --git a/meta/recipes-devtools/gcc/gcc-4.9/0056-top-level-reorder_gcc-bug-61144.patch b/meta/recipes-devtools/gcc/gcc-4.9/0056-top-level-reorder_gcc-bug-61144.patch
new file mode 100644
index 0000000..11fa969
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-4.9/0056-top-level-reorder_gcc-bug-61144.patch
@@ -0,0 +1,25 @@
+--- /dev/null
++++ b/meta/recipes-devtools/gcc/gcc-4.9/0056-top-level-reorder_gcc-bug-61144.patch
+@@ -0,0 +1,21 @@
++--- a/gcc/varpool.c 2014/10/05 02:50:01 215895
+++++ b/gcc/varpool.c 2014/10/05 04:52:19 215896
++@@ -329,8 +329,16 @@
++
++ /* Variables declared 'const' without an initializer
++ have zero as the initializer if they may not be
++- overridden at link or run time. */
++- if (!DECL_INITIAL (real_decl)
+++ overridden at link or run time.
+++
+++ It is actually requirement for C++ compiler to optimize const variables
+++ consistently. As a GNU extension, do not enfore this rule for user defined
+++ weak variables, so we support interposition on:
+++ static const int dummy = 0;
+++ extern const int foo __attribute__((__weak__, __alias__("dummy")));
+++ */
+++ if ((!DECL_INITIAL (real_decl)
+++ || (DECL_WEAK (decl) && !DECL_COMDAT (decl)))
++ && (DECL_EXTERNAL (decl) || decl_replaceable_p (decl)))
++ return error_mark_node;
++
+
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