tree 2cac169f48a428e1e6d4fb201d784d3f69d53e16
parent d7045cc09ce44053fff3bd69ca1c37f836c38ceb
author Shilei Tian <tianshilei1992@gmail.com> 1610315169 -0500
committer Copybara-Service <copybara-worker@google.com> 1610325130 -0800

[OpenMP] Not set OPENMP_STANDALONE_BUILD=ON when building OpenMP along with LLVM

For now, `*_STANDALONE_BUILD` is set to ON even if they're built along
with LLVM because of issues mentioned in the comments. This can cause some issues.
For example, if we build OpenMP along with LLVM, we'd like to copy those OpenMP
headers to `<prefix>/lib/clang/<version>/include` such that `clang` can find
those headers without using `-I <prefix>/include` because those headers will be
copied to `<prefix>/include` if it is built standalone.

In this patch, we fixed the dependence issue in OpenMP such that it can be built
correctly even with `OPENMP_STANDALONE_BUILD=OFF`. The issue is in the call to
`add_lit_testsuite`, where `clang` and `clang-resource-headers` are passed as
`DEPENDS`. Since we're building OpenMP along with LLVM, `clang` is set by CMake
to be the C/C++ compiler, therefore these two dependences are no longer needed,
where caused the dependence issue.

Reviewed By: jdoerfert

Differential Revision: https://reviews.llvm.org/D93738

GitOrigin-RevId: 7be3285248bf54d0784a76174cf44cf7c1e780a5