[PATCH] D14731: [libcxx] Add clang thread safety annotations to mutex and lock_guard

[Marshall Clow via cfe-commits]

mclow.lists added a comment.

>   We usually state things in the negative, so the controlling macro should be _LIBCPP_HAS_NO_THREAD_ANNOTATION


Or actually, `_LIBCPP_HAS_NO_THREAD_ANNOTATIONS`


http://reviews.llvm.org/D14731