[Bug libstdc++/51749] Including pollutes global namespace

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51749

--- Comment #26 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
No, I mean what I wrote, see
http://pubs.opengroup.org/onlinepubs/007904975/functions/xsh_chap02_02.html
info libc 'Feature Test Macros'
etc.