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| author | Felix Fietkau <nbd@openwrt.org> | 2014-10-19 16:18:56 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2014-10-19 16:18:56 +0000 |
| commit | 663ddf8f17c06717d0b223ab3b133fea996a7afb (patch) | |
| tree | 46e773c61abf63c702da401709d06ef99fffe5db /toolchain/gcc/patches/4.9-linaro | |
| parent | fedcfd030383e0096200d5aba8f18987def72014 (diff) | |
| download | upstream-663ddf8f17c06717d0b223ab3b133fea996a7afb.tar.gz upstream-663ddf8f17c06717d0b223ab3b133fea996a7afb.tar.bz2 upstream-663ddf8f17c06717d0b223ab3b133fea996a7afb.zip | |
gcc: backport an upstream fix for extern vars with local weak definitions
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 42962
Diffstat (limited to 'toolchain/gcc/patches/4.9-linaro')
| -rw-r--r-- | toolchain/gcc/patches/4.9-linaro/020-fix_pr61144.patch | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/toolchain/gcc/patches/4.9-linaro/020-fix_pr61144.patch b/toolchain/gcc/patches/4.9-linaro/020-fix_pr61144.patch new file mode 100644 index 0000000000..a6b320d881 --- /dev/null +++ b/toolchain/gcc/patches/4.9-linaro/020-fix_pr61144.patch @@ -0,0 +1,21 @@ +--- a/gcc/varpool.c ++++ b/gcc/varpool.c +@@ -329,8 +329,16 @@ ctor_for_folding (tree decl) + + /* 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; + |