Function gsl_sys::gsl_linalg_LU_band_svx

pub unsafe extern "C" fn gsl_linalg_LU_band_svx(
    lb: usize, 
    ub: usize, 
    LUB: *const gsl_matrix, 
    piv: *const gsl_vector_uint, 
    x: *mut gsl_vector
) -> c_int

This is supported on crate feature v2_7 only.