https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80712
Bug ID: 80712 Summary: mention the name of the attribute being ignored Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: tromey at gcc dot gnu.org Target Milestone: --- I saw an error when building firefox with gcc 6.3.1 (fedora 25 system gcc): /home/tromey/firefox-git/gecko/js/src/frontend/EitherParser.h:253:13: error: ignoring attributes applied to ‘__va_list_tag’ after definition [-Werror=attributes] You can see more info here: https://bugzilla.mozilla.org/show_bug.cgi?id=1363116 I don't know what attribute might be applied here. It would be handy if gcc mentioned which attribute it was ignoring. (FWIW I am not sure but I suspect this error might be a gcc bug.)