[Bug fortran/92613] New: Bogus warning with -cpp and -fpreprocessed

[jellby at yahoo dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92613

            Bug ID: 92613
           Summary: Bogus warning with -cpp and -fpreprocessed
           Product: gcc
           Version: 7.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jellby at yahoo dot com
  Target Milestone: ---

$ cat a.f90
program test
  implicit none
  write(6,*) 'hello'
! it's good!
end program

$ gfortran -cpp a.f90 -E -o a.pp.f90 && gfortran -cpp -fpreprocessed a.pp.f90
a.f90:4:5:

 ! it's good!
     1
Warning: missing terminating ' character

I guess it doesn't make much sense to use -cpp and -fpreprocessed, but it may
happen when using some tools (see
https://gitlab.kitware.com/cmake/cmake/issues/17466). And, in any case, the
warning is "wrong" since the quote is part of a comment line...