extern int v3p_netlib_dlaev2_(
  v3p_netlib_doublereal *a,
  v3p_netlib_doublereal *b,
  v3p_netlib_doublereal *c__,
        v3p_netlib_doublereal *rt1,
  v3p_netlib_doublereal *rt2,
  v3p_netlib_doublereal *cs1,
  v3p_netlib_doublereal *sn1
  );