https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91964
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jörg Richter from comment #0) > I think all warnings are wrong because nowhere is a enum constant in a > boolean context. The warning is documented as diagnosing "using non-boolean integer constants in boolean context". C has the value 2 in all cases, no matter what form of cast you use, which is a "non-boolean" value. > Enums 'A' and 'B' dont seem to trigger the warning. A and B have values 0 and 1. The warning seems to be behaving as intended.
