[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
diff --git a/test/std/lit.local.cfg b/test/std/lit.local.cfg
new file mode 100644
index 0000000..6b1e2c6
--- /dev/null
+++ b/test/std/lit.local.cfg
@@ -0,0 +1,2 @@
+if 'parallel-algorithms' not in config.available_features:
+ config.unsupported = True
