macOS Clang C++17 filesystem header not found

Question

I need to write a program using the (experimental) C++17 filesystem library but clang on my Mac (macOS 10.12.03) doesn\'t seem to

Answer 1

Libc++, which is the C++ standard library on OS X, has not moved to yet because the specification is not stable.

Hopefully will be a part of the Clang 6.0 release. (We missed 5.0)