SIGNATURE_CHECK (GNULIB_NAMESPACE::mktime, time_t, (struct tm *));
#endif
+#if GNULIB_TIME_R
SIGNATURE_CHECK (GNULIB_NAMESPACE::localtime_r, struct tm *,
(time_t const *, struct tm *));
SIGNATURE_CHECK (GNULIB_NAMESPACE::gmtime_r, struct tm *,
(time_t const *, struct tm *));
+#endif
#if GNULIB_STRPTIME
SIGNATURE_CHECK (GNULIB_NAMESPACE::strptime, char *,