https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67454
--- Comment #6 from James Ballantine <j.ballantine at gmail dot com> --- Gcc-4.3.0 has never been on the system as other then the source code for 4.3.2, in a directory not in any $PATH. Yes gmp, mpfr, ... are all in the top level directory tree.