http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58842
--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- The error "GNU Fortran is not working" is often related to problems with one (or several) of the gmp, mpfr, or mpc libraries. You may have a look at the following PRs: pr30960, pr34207, pr34242, pr36586, pr36810, pr41601, pr43770, pr45641, pr50062, pr50238, pr51103, or pr51607. Check (1) that you have the right versions of this libraries in /opt/local that pass 'make check' without error; (2) that you don't have other such libraries which may interfere with the one in /opt/local (look into /usr/local for instance).
