https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66869
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jason at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
--- gcc/c/c-decl.c.jj 2015-12-15 14:04:03.790772497 +0100
+++ gcc/c/c-decl.c 2015-12-15 14:04:27.838447800 +0100
@@ -10723,11 +10723,19 @@ c_write_global_declarations_1 (tree glob
if (TREE_CODE (decl) == FUNCTION_DECL
&& DECL_INITIAL (decl) == 0
&& DECL_EXTERNAL (decl)
- && !TREE_PUBLIC (decl)
- && C_DECL_USED (decl))
+ && !TREE_PUBLIC (decl))
{
- pedwarn (input_location, 0, "%q+F used but never defined", decl);
- TREE_NO_WARNING (decl) = 1;
+ if (C_DECL_USED (decl))
+ {
+ pedwarn (input_location, 0, "%q+F used but never defined", decl);
+ TREE_NO_WARNING (decl) = 1;
+ }
+ /* For -Wunused-function push the unused statics into cgraph,
+ so that check_global_declaration emits the warning. */
+ else if (warn_unused_function
+ && ! DECL_ARTIFICIAL (decl)
+ && ! TREE_NO_WARNING (decl))
+ cgraph_node::get_create (decl);
}
wrapup_global_declaration_1 (decl);
seems to work (untested though) for C, but for C++ the question is where to add
something like that, should that be in wrapup_globals_for_namespace?
