http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46908
Joseph S. Myers <jsm28 at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Component|c |target Resolution| |INVALID --- Comment #6 from Joseph S. Myers <jsm28 at gcc dot gnu.org> 2010-12-13 18:28:22 UTC --- GCC knows about the limitations of the Windows (msvcrt) printf and scanf functions, which do not support all standard C99 formats, and the warnings are telling you that they are not supported by those libraries. The MinGW libraries (wrapping msvcrt) are a separate project from GCC and there is no GCC bug here.