[Bug driver/13071] no easy way to exclude backward C++ headers from include path

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=13071

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Isn't doing the extern "C" around standard C++ headers declared by the C++
standard as undefined behavior?