https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68717
--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > As discussed in the other related PR, those are real issues - Fortran > fronetnd should not declare one function with multiple and incompatible > declarations. The other related PR is pr68649. The note: "code may be misoptimized unless -fno-strict-aliasing is used" looks odd as the warnings are still there if one uses -fno-strict-aliasing as it was the case before r231239.