tree d71fc9961a76e7381ae7fd75ee5b0a3b5f81ce42
parent fc1ec361d39c403915c3c3c2c74468451fade20f
author Eric Fiselier <eric@efcs.ca> 1549928839 +0000
committer Eric Fiselier <eric@efcs.ca> 1549928839 +0000

Add fenv.h header

Summary:
Some implementations of fenv.h use macros to define the functions they provide. This can cause problems when `std::fegetround()` is spelled in source.

This patch adds a `fenv.h` header to libc++ for the sole purpose of turning those macros into real functions.

Reviewers: rsmith, mclow.lists, ldionne

Reviewed By: rsmith

Subscribers: mgorny, christof, libcxx-commits

Differential Revision: https://reviews.llvm.org/D57729

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@353767 91177308-0d34-0410-b5e6-96231b3b80d8