[PATCH] D8652: [libcxx] Create internal namespace that hides all symbols.

[Eric Fiselier]

EricWF added a comment.

GCC 4.0 seems to have attributes on namespaces and we should require GCC >= 4.7.
I can't seem to find any documentation about when Clang supports visibility attributes on namespaces but it I think it works for all clang versions.


http://reviews.llvm.org/D8652