| commit | 6235a287602fa75ff4b65b4ae3b2c3cc72b40d1b | [log] [tgz] |
|---|---|---|
| author | Mark de Wever <koraq@xs4all.nl> | Wed May 24 18:12:32 2023 +0200 |
| committer | Copybara-Service <copybara-worker@google.com> | Sat May 27 03:56:03 2023 -0700 |
| tree | 54bdba6f154f446667304c32a454312a659d3ece | |
| parent | 64f0d6cb196261b9f518160cd1ba8d1badacfbcb [diff] |
Reland "[CMake] Bumps minimum version to 3.20.0. This reverts commit d763c6e5e2d0a6b34097aa7dabca31e9aff9b0b6. Adds the patch by @hans from https://github.com/llvm/llvm-project/issues/62719 This patch fixes the Windows build. d763c6e5e2d0a6b34097aa7dabca31e9aff9b0b6 reverted the reviews D144509 [CMake] Bumps minimum version to 3.20.0. This partly undoes D137724. This change has been discussed on discourse https://discourse.llvm.org/t/rfc-upgrading-llvms-minimum-required-cmake-version/66193 Note this does not remove work-arounds for older CMake versions, that will be done in followup patches. D150532 [OpenMP] Compile assembly files as ASM, not C Since CMake 3.20, CMake explicitly passes "-x c" (or equivalent) when compiling a file which has been set as having the language C. This behaviour change only takes place if "cmake_minimum_required" is set to 3.20 or newer, or if the policy CMP0119 is set to new. Attempting to compile assembly files with "-x c" fails, however this is workarounded in many cases, as OpenMP overrides this with "-x assembler-with-cpp", however this is only added for non-Windows targets. Thus, after increasing cmake_minimum_required to 3.20, this breaks compiling the GNU assembly for Windows targets; the GNU assembly is used for ARM and AArch64 Windows targets when building with Clang. This patch unbreaks that. D150688 [cmake] Set CMP0091 to fix Windows builds after the cmake_minimum_required bump The build uses other mechanism to select the runtime. Fixes #62719 Reviewed By: #libc, Mordante Differential Revision: https://reviews.llvm.org/D151344 GitOrigin-RevId: cbaa3597aaf6273e66b3f445ed36a6458143fe6a
Parallel STL is an implementation of the C++ standard library algorithms with support for execution policies, as specified in ISO/IEC 14882:2017 standard, commonly called C++17. The implementation also supports the unsequenced execution policy specified in Parallelism TS version 2 and proposed for the next version of the C++ standard in the C++ working group paper P1001. Parallel STL offers efficient support for both parallel and vectorized execution of algorithms. For sequential execution, it relies on an available implementation of the C++ standard library.
To use Parallel STL, you must have the following software installed:
unseq and par_unseq policies only have effect with compilers that support #pragma omp simd or #pragma simd.includes, inplace_merge, merge, nth_element, partial_sort, partial_sort_copy, set_difference, set_intersection, set_symmetric_difference, set_union, sort, stable_partition, stable_sort, unique.exclusive_scan, inclusive_scan, transform_exclusive_scan, transform_inclusive_scan shall be DefaultConstructible. A default constructed-instance of the initial value type shall be the identity element for the specified binary operation.max_element, min_element, minmax_element, partial_sort, partial_sort_copy, sort, stable_sort the dereferenced value type of the provided iterators shall be DefaultConstructible.remove, remove_if, unique the dereferenced value type of the provided iterators shall be MoveConstructible.copy_if, inplace_merge, partial_sort, partial_sort_copy, partition_copy, remove, remove_if, rotate, sort, stable_sort, unique, unique_copy.