[all-commits] [llvm/llvm-project] 963516: [AIX][cmake] Set atomics related macros when build...

[bzEq via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 96351680833e99f0b7161a93ade0a23d7e7e8ba5
      https://github.com/llvm/llvm-project/commit/96351680833e99f0b7161a93ade0a23d7e7e8ba5
  Author: Kai Luo <lkail at cn.ibm.com>
  Date:   2021-10-18 (Mon, 18 Oct 2021)

  Changed paths:
    M llvm/cmake/modules/CheckAtomic.cmake

  Log Message:
  -----------
  [AIX][cmake] Set atomics related macros when build with xlclang

Set `HAVE_CXX_ATOMICS_WITHOUT_LIB` or `HAVE_LIBATOMIC` when build LLVM with xlclang. With these macros set, libraries like libLLVMSupport are able to know whether it's necessary to add `-latomic` to dependent system libs. If `HAVE_LIBATOMIC` is set, `llvm-config --system-libs` appends `-latomic` to its output.

Reviewed By: jsji

Differential Revision: https://reviews.llvm.org/D111782