[Bug fortran/93736] New: Add .f18 and .F18 file suffixes

[thenlich at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93736

            Bug ID: 93736
           Summary: Add .f18 and .F18 file suffixes
           Product: gcc
           Version: 9.2.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: thenlich at gcc dot gnu.org
  Target Milestone: ---

The Fortran compiler should recognize Fortran source files with the .f18 and
.F18 filename extension.