https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97865
--- Comment #5 from Iain Sandoe <iains at gcc dot gnu.org> --- I bootstrapped several times (without using MACOSX_DEPLOYMENT_TARGET) and have been looking into other issues. Note that the libgfortran directory throws up a lot of warnings when 'autoreconf'ed' so maybe there's some things to be looked at there anyway.
