pub type daxpy2v_ft = Option<unsafe extern "C" fn(conjx: conj_t, conjy: conj_t, n: dim_t, alpha1: *const f64, alpha2: *const f64, x: *const f64, incx: inc_t, y: *const f64, incy: inc_t, z: *mut f64, incz: inc_t)>;
