[Bug libstdc++/51749] Including <algorithm> pollutes global namespace

[redi at gcc dot gnu.org]

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

--- Comment #30 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Thanks, Joseph, I'll determine what changes we would need. I hope we can make
some progress just by being a bit smarter in libstdc++, and then only need
glibc changes for what's left after that.