https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97304
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> --- If --with-as=/usr/local/bin/as --with-ld=/usr/local/bin/ld is required then it needs to be documented at https://gcc.gnu.org/install/specific.html#x-x-freebsd