toolchain/gcc/patches/4.9-linaro/020-fix_pr61144.patch

   1 --- a/gcc/varpool.c
   2 +++ b/gcc/varpool.c
   3 @@ -329,8 +329,16 @@ ctor_for_folding (tree decl)
   4
   5    /* Variables declared 'const' without an initializer
   6       have zero as the initializer if they may not be
   7 -     overridden at link or run time.  */
   8 -  if (!DECL_INITIAL (real_decl)
   9 +     overridden at link or run time.
  10 +
  11 +     It is actually requirement for C++ compiler to optimize const variables
  12 +     consistently. As a GNU extension, do not enfore this rule for user defined
  13 +     weak variables, so we support interposition on:
  14 +     static const int dummy = 0;
  15 +     extern const int foo __attribute__((__weak__, __alias__("dummy")));
  16 +   */
  17 +  if ((!DECL_INITIAL (real_decl)
  18 +       || (DECL_WEAK (decl) && !DECL_COMDAT (decl)))
  19        && (DECL_EXTERNAL (decl) || decl_replaceable_p (decl)))
  20      return error_mark_node;
  21