[all-commits] [llvm/llvm-project] 41f4df: [libcxx] Force-cache LIBCXX_CXX_ABI_LIBRARY_PATH

[Sergej Jaskiewicz via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 41f4dfd63ea0fe995ddfba1838aa5ed972cc1377
      https://github.com/llvm/llvm-project/commit/41f4dfd63ea0fe995ddfba1838aa5ed972cc1377
  Author: Sergej Jaskiewicz <jaskiewiczs at icloud.com>
  Date:   2020-01-10 (Fri, 10 Jan 2020)

  Changed paths:
    M libcxx/test/CMakeLists.txt

  Log Message:
  -----------
  [libcxx] Force-cache LIBCXX_CXX_ABI_LIBRARY_PATH

Summary:
The `LIBCXX_CXX_ABI_LIBRARY_PATH` CMake variable is cached once in
libcxx/cmake/Modules/HandleLibCXXABI.cmake in the `setup_abi_lib` macro,
and then cached again in libcxx/test/CMakeLists.txt. There, if it is
not set to a value, it is by default set to `LIBCXX_LIBRARY_DIR`.

However, this new value is not actually cached, because the old (empty)
value has been already cached. Use the `FORCE` CMake flag so that it
is saved to the cache.

This should not break anything, because the code changed here previously
had no effect, when it should have.

Reviewers: jroelofs, bcraig, ldionne, EricWF, mclow.lists, vvereschaka, eastig

Reviewed By: vvereschaka

Subscribers: mgorny, christof, dexonsmith, libcxx-commits

Tags: #libc

Differential Revision: https://reviews.llvm.org/D69169