https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93736
--- Comment #3 from Steve Kargl <sgk at troutmask dot apl.washington.edu> --- On Thu, Feb 13, 2020 at 04:40:08PM +0000, thenlich at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93736 > > --- Comment #2 from Thomas Henlich <thenlich at gcc dot gnu.org> --- > I don't know why the Fortran compiler doesn't treat all files as free-form > Fortran source files, unless they have a known extension indicating otherwise. I suppose it has something to do with the fact that gfortran will accept languages other than Fortran. % gfortran9 -o z hello.c % ./z hello If you're really keen on the idea of adding yet another useless extension. Look in gcc/fortran/lang-specs.h. In 70 years, when F2090 is released, I'll let the next generation deal with .F90 and .f90. :-)
