https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61126
--- Comment #23 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- Adding -Wall to the dg-options let the test succeed (in line with the gfortran manual, see comment 21): --- ../_clean/gcc/testsuite/gfortran.dg/wextra_1.f 2012-10-21 13:06:18.000000000 +0200 +++ gcc/testsuite/gfortran.dg/wextra_1.f 2014-05-15 12:05:56.000000000 +0200 @@ -1,5 +1,5 @@ ! { dg-do compile } -! { dg-options "-Wextra" } +! { dg-options "-Wall -Wextra" } program main integer, parameter :: x=3 ! { dg-warning "Unused parameter" } real :: a Indeed the questions asked in comment 22 should be answered.