check_function_exists(name_to_handle_at HAVE_NAME_TO_HANDLE_AT)
check_function_exists(pipe2 HAVE_PIPE2)
check_function_exists(accept4 HAVE_ACCEPT4)
+check_function_exists(sigdescr_np HAVE_SIGDESCR_NP)
include(CMakePushCheckState)
cmake_push_check_state(RESET)