https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118955
--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Wilco from comment #6) > (In reply to Andrew Pinski from comment #5) > > > Or you could just do: > > #define TARGET_F951_OPTIONS "%{Ofast|ffast-math|funsafe-math-optimizations: > > \ > > %{!nostdinc: \ > > %:fortran-preinclude-file(-fpre-include= math-vector-fortran.h > > finclude%s/)}}" > > > > Which enables only for ffast-math in the specs in the first place. > > This would work for plain -Ofast and -ffast-math indeed, however will it > correctly work if you say -ffast-math -fmath-errno? #define TARGET_F951_OPTIONS "%{!fmath-errno: %{Ofast|ffast-math|funsafe-math-optimizations: \ %{!nostdinc: \ %:fortran-preinclude-file(-fpre-include= math-vector-fortran.h finclude%s/)}}}" Then.