[PATCH] D16639: [libcxx] Limit catopen usage to unix-like OSes

[Ed Schouten via cfe-commits]

ed added a comment.

I'm usually not a big fan of using definitions such as `__unix__`, because it is pretty vague and defined inconsistently. That said, if you're going to use this definition, then there is some good news: CloudABI doesn't define it, meaning that you could just remove it from this list.


http://reviews.llvm.org/D16639