http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50871
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-10-27 13:31:17 UTC --- It would work for my original case, yes. There are other cases where the warning is not a pedwarn, but is just suppressed by system_header while building the lib. But it occurred to me that we currently rely on system_header to suppress warnings about using variadic templates in c++98 mode
