#if GNULIB_TEST_LOGB
SIGNATURE_CHECK (GNULIB_NAMESPACE::logb, double, (double));
#endif
+#if GNULIB_TEST_LOGBL
+SIGNATURE_CHECK (GNULIB_NAMESPACE::logbl, long double, (long double));
+#endif
#if GNULIB_TEST_MODFF
SIGNATURE_CHECK (GNULIB_NAMESPACE::modff, float, (float, float *));