[Bug fortran/37420] New: [4.4 Regression] -Wunused-variable broken

["janus at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

Consider the following Fortran code:

subroutine s(x)
  real :: x
  integer :: i
end subroutine

Compiling this with "gfortran-4.3 -Wunused-variable" triggered two warnings:

Warning: Unused variable 'i' declared at (1)
Warning: Unused dummy argument 'x' at (1)

With recent trunk builds the first one is missing, and only the missing dummy
argument is detected. This seems to be a Fortran-specific problem, since unused
variables in C code are reported as expected.
Observed on x86_64-unknown-linux-gnu with rev. 140091.


-- 
           Summary: [4.4 Regression] -Wunused-variable broken
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: janus at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37420