tree 8f9d68680944049406a01e576172c979f2be87a4
parent ebe55fc655e3ac05e5e8f4881809cf5fc2edc5bf
author Vasileios Kalintiris <Vasileios.Kalintiris@imgtec.com> 1455632127 +0000
committer Vasileios Kalintiris <Vasileios.Kalintiris@imgtec.com> 1455632127 +0000

Issue a warning instead of fatal errors when checks for libatomic fail.

This should fix PR26631, PR26622 and has the nice property that the addition
of the CheckLibcxxAtomic.cmake module acts as an NFC on the platforms of the
reporters (at least for the time being).

As these bug reports explain, CMake fails the atomic check because the
include headers might not exist in the host environment. We could
potentially point to the headers provided by libcxx itself.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@260961 91177308-0d34-0410-b5e6-96231b3b80d8