check_function_exists(_getpid HAVE__GETPID)
check_function_exists(mkdir HAVE_MKDIR)
check_function_exists(_mkdir HAVE__MKDIR)
+check_function_exists(setenv HAVE_SETENV)
check_function_exists(putenv HAVE_PUTENV)
check_function_exists(fcntl HAVE_FCNTL)
check_function_exists(strerror HAVE_STRERROR)