https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66605
--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> BTW, is the resulting warning actually correct?
According the gfortran manual
-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 implied by -Wextra if also -Wunused or -Wall is used.
If I understand correctly the above statement, -Wunused-parameter should not
emit a warning for the test in comment 0: there is no parameter. The warning
should be issued with -Wunused-dummy-argument
pr66605.f90:5:25:
SUBROUTINE sub (neq, time, y, dydt)
1
Warning: Unused dummy argument 'time' at (1) [-Wunused-dummy-argument]
