https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66765
--- Comment #9 from David Edelsohn <dje at gcc dot gnu.org> --- > [Book15] f90/bug% gcc ya_sincos.c -fdump-fortran-original > cc1: error: unrecognized command line option '-fdump-fortran-original' This is a valid Fortran option producing an error from cc1 when passed to gcc. but > [Book15] f90/bug% gcc ya_sincos.c -fblah-blah > gcc: error: unrecognized command line option '-fblah-blah' This is an invalid command line option for any GCC front-end and evokes an error from gcc. I'm not sure what you are trying to prove. > nothing to do with gfortran FE, and > [Book15] f90/bug% gcc ya_sincos.c -fdefault-integer-8 > cc1: warning: command line option '-fdefault-integer-8' is valid for Fortran > but not for C Some errors are caught with a more user-friendly error message. I don't see what any of this proves. The Fortran FE is the only place that can differentiate between gfortran command line options and c-family command line options.
