[Bug libstdc++/40856] numeric_limits not specialized for __int128_t or __uint128_t

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40856

--- Comment #13 from Marc Glisse <glisse at gcc dot gnu.org> 2012-10-25 20:23:43 UTC ---
(In reply to comment #12)
> If I can declare a variable of a non-standard extension-type with some
> compiler flags in effect, e.g., -std=c++11, then I should also be able
> to get a sensible answer from std::numeric_limits and <type_traits>
> with the same compiler flags.

*If* that's what's wanted, defined(__SIZEOF_INT128__) is the right test
(_GLIBCXX_USE_INT128 could use it in its definition).