Function igraph_sparsemat_luresol 

pub unsafe extern "C" fn igraph_sparsemat_luresol(
    dis: *const igraph_sparsemat_symbolic_t,
    din: *const igraph_sparsemat_numeric_t,
    b: *const igraph_vector_t,
    res: *mut igraph_vector_t,
) -> igraph_error_t