http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56227
--- Comment #5 from Craig Powers <craig.powers at gmail dot com> 2013-02-06 19:03:10 UTC --- ../../gcc-4.8-20130203/gcc/lto/lto.c: In function 'void lto_resolution_read(spla y_tree, FILE*, lto_file*)': ../../gcc-4.8-20130203/gcc/lto/lto.c:2229:33: error: unknown conversion type cha racter 'I' in format [-Werror=format=] " not in object file", id); ^ The full line is, internal_error ("resolution sub id " HOST_WIDE_INT_PRINT_HEX_PURE " not in object file", id); Given that it's an internal error, I'm going to do a workaround so it will still build for me.