Hi Thomas, > the rather self-explanatory patch implements the -Wzerotrip > option. The positive form is not really useful, because > the option is on by default (so the default behavior is > not changed). > > The negative form of the option, -Wno-zerotrip, suppresses the > warning. I have also added information of how to suppress the > warning in the message. > > Alternatively, it is also possible to only activate the warning > if it is set explicitly, or with -Wall. I can easily change the > patch to do so, if that turns out to be the consensus (I have no > strong opinion on the matter either way) > > Regression-tested. OK for trunk?
I'm never quite sure whether I like the ongoing inflation of warning options, but this particular flag is one that I might find useful myself on occasion. So: Ok for trunk from my side. However, I would prefer to disable the warning by default, but include it in -Wall. Thanks for the patch ... Cheers, Janus > 2013-08-03 Thomas Koenig <tkoe...@gcc.gnu.org> > > PR fortran/56666 > * gfortran.h (gfc_option_t): Add warn_zerotrip. > * invoke.texi (-Wzerotrip): Document option. > * lang.opt (Wzerotrip): Add. > * options.c (gfc_init_options): Initialize warn_zerotrip. > (gfc_handle_option): Handle OPT_Wzerotrip. > * resolve.c (gfc_resolve_iterator): Honor > gfc_option.warn_zerotrip; update error message to show > how to suppress the warning. > > 2013-08-03 Thomas Koenig <tkoe...@gcc.gnu.org> > > PR fortran/56666 > * gfortran.dg/do_check_10.f90: New test.
