[Bug c++/60512] would be useful if gcc implemented __has_feature similary to clang

[glisse at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60512

--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> ---
http://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations