http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48847
--- Comment #2 from Thomas Koenig <tkoenig at gcc dot gnu.org> 2012-02-03 22:13:07 UTC --- This doesn't match the docs. We say -Wunused-parameter' Contrary to `gcc''s meaning of `-Wunused-parameter', `gfortran''s implementation of this option does not warn about unused dummy arguments (see `-Wunused-dummy-argument'), but about unused `PARAMETER' values. `-Wunused-parameter' is not included in `-Wall' but is implied by `-Wall -Wextra'. -Wunsued-parameter is being used in the C sense here. We don't warn with ig25@linux-fd1f:~/Krempel/Unused> cat bar.f90 module foo contains function f(g) f = g() end function f end module foo ig25@linux-fd1f:~/Krempel/Unused> gfortran -S -Wunused-dummy-argument bar.f90 (and we should).