https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62068
--- Comment #6 from David Binderman <dcb314 at hotmail dot com> --- (In reply to Andreas Schwab from comment #2) > There is no such requirement for va_start/va_end. I am not sure what you mean here. I checked K & R 2 and va_start and va_end seem to be a matched pair to me. AFAIK, each va_end is 121 with each va_start. In practice, some systems might be able to handle one of them being missing, but the language requirement is still there. Unless you know different ?