Function gr_mat_diagonalization_precomp 

pub unsafe extern "C" fn gr_mat_diagonalization_precomp(
    D: *mut gr_vec_struct,
    L: *mut gr_mat_struct,
    R: *mut gr_mat_struct,
    A: *const gr_mat_struct,
    eigenvalues: *const gr_vec_struct,
    mult: *const gr_vec_struct,
    ctx: *mut gr_ctx_struct,
) -> c_int