https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63773
--- Comment #13 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- There is still a bootstrapping issue with libcc1 when bootstrapping with gcc 4.9: https://gcc.gnu.org/ml/gcc-patches/2014-11/msg00731.html
