https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82466
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Thanks. I don't think there is *much* more than the below to it:
Index: decl.c
===================================================================
--- decl.c (revision 253509)
+++ decl.c (working copy)
@@ -1431,7 +1431,13 @@
/* Avoid warnings redeclaring built-ins which have not been
explicitly declared. */
if (DECL_ANTICIPATED (olddecl))
- return NULL_TREE;
+ {
+ if (TREE_PUBLIC (newdecl))
+ warning_at (DECL_SOURCE_LOCATION (newdecl),
+ 0, "built-in function %qD declared as
non-function",
+ newdecl);
+ return NULL_TREE;
+ }
/* If you declare a built-in or predefined function name as static,
the old definition is overridden, but optionally warn this was a
however, with the warning unconditionally enabled, as in the C front-end,
g++.dg/parse/builtin2.C fails. Maybe that's ok, maybe we want to give the
warning a name. Bernd, are you willing to work on this issue too, for 8?
