tree cdba4de2a612244fa7a87784251070a26a2dfb24
parent b0a21c9d72df4951c2f18d28b5401f604efde1cb
author Louis Dionne <ldionne@apple.com> 1565029754 +0000
committer Copybara-Service <copybara-worker@google.com> 1598996641 -0700

[libc++] Take 2: Integrate the PSTL into libc++

Summary:
This commit allows specifying LIBCXX_ENABLE_PARALLEL_ALGORITHMS when
configuring libc++ in CMake. When that option is enabled, libc++ will
assume that the PSTL can be found somewhere on the CMake module path,
and it will provide the C++17 parallel algorithms based on the PSTL
(that is assumed to be available).

The commit also adds support for running the PSTL tests as part of
the libc++ test suite.

The first attempt to commit this failed because it exposed a bug in the
tests for modules. Now that this has been fixed, it should be safe to
commit this.

Reviewers: EricWF

Subscribers: mgorny, christof, jkorous, dexonsmith, libcxx-commits, mclow.lists, EricWF

Tags: #libc

Differential Revision: https://reviews.llvm.org/D60480

llvm-svn: 367903
GitOrigin-RevId: 0a06eb911b830cf693747ea6cd975bd97b454e3e