https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58875
--- Comment #2 from Eric Gallager <egallager at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #1) > Like PR58876 this is another case where you need -Wsystem-headers to get > warnings from within library code. Aren't there others along those lines too? I forget the numbers...