[PATCH] D28728: [libc++] Introduce _LIBCPP_EXTERN_VIS to fix __libcpp_debug_function link errors

[Shoaib Meenai via Phabricator via cfe-commits]

smeenai added a comment.

This will need to be exported on other platforms too when hidden visibility happens :)

Is it okay for these to be exported unconditionally, or should their exporting be determined by `_LIBCPP_DEBUG`? This LGTM if it's the former.


https://reviews.llvm.org/D28728