[Bug libstdc++/50441] [C++0x] <type_traits> is missing GNU extension types

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50441

--- Comment #11 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-09-17 21:32:49 UTC ---
Better adding configure tests...