//SIGNATURE_CHECK (GNULIB_NAMESPACE::log10, double, (double));
//SIGNATURE_CHECK (GNULIB_NAMESPACE::log1p, double, (double));
//SIGNATURE_CHECK (GNULIB_NAMESPACE::logb, double, (double));
//SIGNATURE_CHECK (GNULIB_NAMESPACE::log10, double, (double));
//SIGNATURE_CHECK (GNULIB_NAMESPACE::log1p, double, (double));
//SIGNATURE_CHECK (GNULIB_NAMESPACE::logb, double, (double));