https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108369
--- Comment #11 from Ben Brewer <ben.brewer at codethink dot co.uk> --- So I was using "-x f77" which I would expect to instruct the compiler to run in a mode compatible with Fortran 77, it seems non-intuitive to have to enable -std=legacy to compile the very tests which define f77.
