From 70d69ea1f982701228c038fdcf73c8236d445e00 Mon Sep 17 00:00:00 2001 From: nbd Date: Sun, 19 Oct 2014 16:18:56 +0000 Subject: [PATCH] gcc: backport an upstream fix for extern vars with local weak definitions Signed-off-by: Felix Fietkau git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42962 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- .../gcc/patches/4.9-linaro/020-fix_pr61144.patch | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 toolchain/gcc/patches/4.9-linaro/020-fix_pr61144.patch 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; + -- 2.11.0