tree a29d2ebc17eaa0b015211037f09a33f853fc5a72
parent 3e3199a8000cd9d3b8f9f36a12798cc336fcd63f
author Dimitry Andric <dimitry@andric.com> 1554315096 +0000
committer Dimitry Andric <dimitry@andric.com> 1554315096 +0000

Ensure correct pthread flags and libraries are used

On most platforms, certain compiler and linker flags have to be passed
when using pthreads, otherwise linking against libomp.so might fail with
undefined references to several pthread functions.

Use CMake's `find_package(Threads)` to determine these for standalone
builds, or take them (and optionally modify them) from the top-level
LLVM cmake files.

Also, On FreeBSD, ensure that libomp.so is linked against libm.so,
similar to NetBSD.

Adjust test cases with hardcoded `-lpthread` flag to use the common
build flags, which should now have the required pthread flags.

Reviewers: emaste, jlpeyton, krytarowski, mgorny, protze.joachim, Hahnfeld

Reviewed By: Hahnfeld

Subscribers: AndreyChurbanov, tra, EricWF, Hahnfeld, jfb, jdoerfert, openmp-commits

Tags: #openmp

Differential Revision: https://reviews.llvm.org/D59451


git-svn-id: https://llvm.org/svn/llvm-project/openmp/trunk@357618 91177308-0d34-0410-b5e6-96231b3b80d8