blob: a6b320d88109815d0a2c7480ad3c307578b41c92 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
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;
|
