[Bug fortran/31587] New: Module files shouldn't be updated if their content doesn't change

[fxcoudert at gcc dot gnu dot org]

If we recompile a file that outputs the same .mod files, they shouldn't get
updated: it makes dependency analysis useless and probably makes parallel
compiling (make -jN) less efficient.

$ cat a.f90
module foo
  integer, parameter :: bar = 42
end module foo
$ gfortran -c a.f90
$ stat foo.mod | grep Modify
Modify: 2007-04-16 11:15:54.000000000 +0200
$ gfortran -c a.f90         
$ stat foo.mod | grep Modify
Modify: 2007-04-16 11:15:58.000000000 +0200


-- 
           Summary: Module files shouldn't be updated if their content
                    doesn't change
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: trivial
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: fxcoudert at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31587