check_c_source_compiles (
                                 "#include <time.h>
                                 int main () {
                                        struct timespec time_sp = {0, 500000000L};
                                        nanosleep (&time_sp, NULL);
                                        return 0;
                                 }"
                                 PLIBSYS_HAS_NANOSLEEP
                                )

elseif(PLIBSYS_HAS_NANOSLEEP)