https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91842
--- Comment #2 from Martin Liška <marxin at gcc dot gnu.org> --- (In reply to Martin Jambor from comment #1) > I don't see this in my test results. If your architecture is not > x86_64-linux (and even if it is), please fill in the host and target > Bugzilla fields appropriately. Grepping GCC sources, it seems it is > some variant of power PC? Yes, apparently the check is wrapped in a target hook: TARGET_INVALID_ARG_FOR_UNPROTOTYPED_FN and there's a single usage of the macro here: gcc/c/c-typeck.c > I will have a look at it there after I deal > with the more serious fallout.