------- Additional Comments From martin at mpa-garching dot mpg dot de 2004-10-26 11:23 ------- Here is a more comprehensive example:
module foo implicit none contains subroutine bar(arg1, arg2, arg3, arg4) character(len=80), intent(in) :: arg1 character(len=80), dimension(:), intent(in) :: arg2 integer, dimension(:), intent(in) :: arg3 integer, intent(in) :: arg4 print *, arg1, arg2, arg3, arg4 end subroutine bar end module foo ~/tmp>gfortran -W -Wunused -c -O2 gfbug.f90 gfbug.f90:6: warning: unused parameter 'arg2' gfbug.f90:6: warning: unused parameter 'arg3' gfbug.f90:6: warning: unused parameter '_arg1' gfbug.f90:6: warning: unused parameter '_arg2' Note that there is no warning for arg4. Note also that some of the warnings are only triggered with -O2. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18111
