http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61126
--- Comment #8 from Manuel López-Ibáñez <manu at gcc dot gnu.org> --- (In reply to Tobias Burnus from comment #6) > Thus, in GCC - whether Fortran or C - it is enabled with -Wextra, but only > if also -Wunused is used. The latter is implied by -Wall. This is not necessarily true for gfortran, since it doesn't use the common options machinery and it fiddles with the options directly. I'm not sure if this is the case or not for this particular option, but it could be a possibility (one more reason to move gfortran to use the common machinery).
