//SIGNATURE_CHECK (GNULIB_NAMESPACE::exp, double, (double));
//SIGNATURE_CHECK (GNULIB_NAMESPACE::fabs, double, (double));
//SIGNATURE_CHECK (GNULIB_NAMESPACE::fmod, double, (double, double));
//SIGNATURE_CHECK (GNULIB_NAMESPACE::exp, double, (double));
//SIGNATURE_CHECK (GNULIB_NAMESPACE::fabs, double, (double));
//SIGNATURE_CHECK (GNULIB_NAMESPACE::fmod, double, (double, double));