SIGNATURE_CHECK (GNULIB_NAMESPACE::log10f, float, (float));
#endif
+#if GNULIB_TEST_LOG2F
+SIGNATURE_CHECK (GNULIB_NAMESPACE::log2f, float, (float));
+#endif
+#if GNULIB_TEST_LOG2
+SIGNATURE_CHECK (GNULIB_NAMESPACE::log2, double, (double));
+#endif
+#if GNULIB_TEST_LOG2L
+SIGNATURE_CHECK (GNULIB_NAMESPACE::log2l, long double, (long double));
+#endif
+
#if GNULIB_TEST_MODFF
SIGNATURE_CHECK (GNULIB_NAMESPACE::modff, float, (float, float *));
#endif