Author: nbd Date: 2014-10-19 18:18:56 +0200 (Sun, 19 Oct 2014) New Revision: 42962
Added: trunk/toolchain/gcc/patches/4.9-linaro/020-fix_pr61144.patch Log: gcc: backport an upstream fix for extern vars with local weak definitions Signed-off-by: Felix Fietkau <[email protected]> Added: trunk/toolchain/gcc/patches/4.9-linaro/020-fix_pr61144.patch =================================================================== --- trunk/toolchain/gcc/patches/4.9-linaro/020-fix_pr61144.patch (rev 0) +++ trunk/toolchain/gcc/patches/4.9-linaro/020-fix_pr61144.patch 2014-10-19 16:18:56 UTC (rev 42962) @@ -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; + _______________________________________________ openwrt-commits mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-commits
