https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64224
--- Comment #3 from ktkachov at gcc dot gnu.org --- (In reply to Richard Earnshaw from comment #2) > Might be better to just deprecate -mapcs; it's a feature of the old ABI > anyway, so there's not much point in trying to make it fully conform to the > latest specs. -mapcs is used in the Linux kernel though.