http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49080
--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2011-05-20 16:30:51 UTC --- It should be safe to copy the GCC copy of longlong.h into glibc; I tried to ensure that the GCC copy is suitable for use in both places.