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[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
This commit is contained in:
Louis Dionne 2019-08-05 18:29:14 +00:00
parent ad1b2fd4c0
commit e9c54d25b3

View File

@ -30,8 +30,8 @@ if(${LLVM_BUILD_RUNTIME})
# Add the projects in reverse order of their dependencies so that the
# dependent projects can see the target names of their dependencies.
add_llvm_external_project(libunwind)
add_llvm_external_project(libcxxabi)
add_llvm_external_project(pstl)
add_llvm_external_project(libcxxabi)
add_llvm_external_project(libcxx)
endif()
if(NOT LLVM_BUILD_EXTERNAL_COMPILER_RT)