message: Replace 'hypre_ParCSRDiagScale' with 'HYPRE_ParCSRDiagScale',
  since the former is not exposed in older versions of hypre.
diff: @@ -3238,7 +3238,8 @@ void HypreSmoother::Mult(const HypreParVector &b, HypreParVector &x) const
  x.HypreWrite();
  if (type == 0 && relax_times == 1)
  {
  - hypre_ParCSRDiagScale(*A, b, x);
  + // Note: hypre_ParCSRDiagScale() is not exposed in older versions
  + HYPRE_ParCSRDiagScale(NULL, *A, b, x);
  if (relax_weight != 1.0)
  {
  hypre_ParVectorScale(relax_weight, x);
  