https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68701
--- Comment #6 from Uroš Bizjak <ubizjak at gmail dot com> --- (In reply to Jakub Jelinek from comment #5) > (In reply to Uroš Bizjak from comment #4) > > (In reply to Jakub Jelinek from comment #3) > > > As main needs dynamic stack realignment, I wonder if we just shouldn't > > > error > > > out on trying to compile it with -ffixed-ebp. > > > > It is still possible to compile with -maccumulate-outgoing-args. Perhaps we > > can error out with the advice that -ffixed-ebp requires -m-o-a option, as is > > already the case with stack probing? > > Yeah. Or if neither -m{,no-}accumulate-outgoing-args is specified, perhaps > turn that on automatically instead if -ffixed-ebp and only error out if > explicit -mno-accumulate-outgoing-args? IMO, this is a good idea.