https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63591
--- Comment #8 from Manuel López-Ibáñez <manu at gcc dot gnu.org> --- (In reply to Andreas Schwab from comment #7) > A function declaration with forward declared parameters it is a prototype, > sort of. Not defining the forward declared parameter as a real parameter > should probably be flagged as an error. Indeed. Still someone has to implement it... Kjetil?