cmake LIBCXXABI_HAS_CXA_THREAD_ATEXIT_IMPL examples

Lewuathe/mlir-hello thirdparty/llvm-project/libcxxabi/cmake/config-ix.cmake :101 

check_library_exists(c __cxa_thread_atexit_impl ""
    LIBCXXABI_HAS_CXA_THREAD_ATEXIT_IMPL)

Lewuathe/mlir-hello thirdparty/llvm-project/libcxxabi/cmake/config-ix.cmake :106 

check_library_exists(c __cxa_thread_atexit_impl ""
    LIBCXXABI_HAS_CXA_THREAD_ATEXIT_IMPL)

Lewuathe/mlir-hello thirdparty/llvm-project/libcxxabi/cmake/config-ix.cmake :111 

check_library_exists(c __cxa_thread_atexit_impl ""
    LIBCXXABI_HAS_CXA_THREAD_ATEXIT_IMPL)