Function gsl_sys::gsl_splinalg_itersolve_iterate

pub unsafe extern "C" fn gsl_splinalg_itersolve_iterate(
    A: *const gsl_spmatrix, 
    b: *const gsl_vector, 
    tol: f64, 
    x: *mut gsl_vector, 
    w: *mut gsl_splinalg_itersolve
) -> c_int