cmake LIBOMP_HAVE_LIBM examples

Lewuathe/mlir-hello thirdparty/llvm-project/openmp/runtime/test/CMakeLists.txt :6 

check_library_exists(m sqrt "" LIBOMP_HAVE_LIBM)

llvm-mirror/openmp runtime/test/CMakeLists.txt :6 

check_library_exists(m sqrt "" LIBOMP_HAVE_LIBM)

INET-RC/GeoMX 3rdparty/openmp/runtime/test/CMakeLists.txt :14 

check_library_exists(m sqrt "" LIBOMP_HAVE_LIBM)