[Bug libstdc++/115885] Build errors when libstdc++ math.h included in extern "C" block

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115885

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note doing extern "C" around includes is bad form and is even undefined
according to the C++ standard.