Function gsl_sys::gsl_linalg_LU_band_unpack

pub unsafe extern "C" fn gsl_linalg_LU_band_unpack(
    M: usize, 
    lb: usize, 
    ub: usize, 
    LUB: *const gsl_matrix, 
    piv: *const gsl_vector_uint, 
    L: *mut gsl_matrix, 
    U: *mut gsl_matrix
) -> c_int

This is supported on crate feature v2_7 only.