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ecc2c089fd
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