[Bug libstdc++/50745] proposal to make visibility of namespace std configurable

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50745

--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-10-16 
14:30:21 UTC ---
We could add the macro-mechanism without documenting it ;)