[Bug fortran/52789] New: gfortran sets -Wunused-parameter in the C sense as well as the Fortran sense

[mathewc at nag dot co.uk]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52789

             Bug #: 52789
           Summary: gfortran sets -Wunused-parameter in the C sense as
                    well as the Fortran sense
    Classification: Unclassified
           Product: gcc
           Version: 4.6.3
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: mathewc@nag.co.uk


I'm using

$ uname -a
Linux stonehenge 3.3.0-4.fc16.x86_64 #1 SMP Tue Mar 20 18:05:40 UTC 2012 x86_64
x86_64 x86_64 GNU/Linux

$ gfortran --version
GNU Fortran (GCC) 4.6.3 20120306 (Red Hat 4.6.3-2)

and with

$ cat unused.f90
subroutine s(x)
integer, parameter :: i = 0
end

I get

$ gfortran -Wunused-parameter -c unused.f90
unused.f90:2.23:

integer, parameter :: i = 0
                       1
Warning: Unused parameter 'i' declared at (1)
unused.f90:1:0: warning: unused parameter ‘x’ [-Wunused-parameter]

I think the C warning used to be suppressed at 4.5(?).

Specifying -Wunused-dummy-argument gets rid of the C message:

$ gfortran -Wunused-parameter -Wunused-dummy-argument -c unused.f90
unused.f90:2.23:

integer, parameter :: i = 0
                       1
Warning: Unused parameter 'i' declared at (1)
unused.f90:1.14:

subroutine s(x)
              1
Warning: Unused dummy argument 'x' at (1)