http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59377
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |WAITING Last reconfirmed| |2013-12-03 Ever confirmed|0 |1 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- I think this is an invalid testcase. GCC does not know what this strlen/memcmp does. If we add extern "C" around strlen and memcmp, GCC does not warn. I think you over reduced the original testcase.