[Bug c++/117331] constexpr with "long double" fails on ppc64el

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117331

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is one of many reasons that the world is moving to -mabi=ieeelongdouble
instead of ibmlongdouble