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[AIX][cmake] Set atomics related macros when build with xlclang
authorKai Luo <lkail@cn.ibm.com>
Mon, 18 Oct 2021 09:17:04 +0000 (09:17 +0000)
committerKai Luo <lkail@cn.ibm.com>
Mon, 18 Oct 2021 09:18:05 +0000 (09:18 +0000)
commit96351680833e99f0b7161a93ade0a23d7e7e8ba5
tree7fab4f5620ed4c3c0f8d460cbab2f933ac5f369etree | snapshot
parent3d850d03ae4d167f929c4469f858446d4a866c01commit | diff
[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
llvm/cmake/modules/CheckAtomic.cmake diff | blob | history
Domain: System / Toolchain;