cmake LIBOMP_HAVE_LIBATOMIC examples

Lewuathe/mlir-hello thirdparty/llvm-project/openmp/runtime/test/CMakeLists.txt :13 

check_library_exists(atomic __atomic_load_1 "" LIBOMP_HAVE_LIBATOMIC)

llvm-mirror/openmp runtime/test/CMakeLists.txt :13 

check_library_exists(atomic __atomic_load_1 "" LIBOMP_HAVE_LIBATOMIC)

INET-RC/GeoMX 3rdparty/openmp/runtime/test/CMakeLists.txt :21 

check_library_exists(atomic __atomic_load_1 "" LIBOMP_HAVE_LIBATOMIC)