don't treat Tpetra deprecated warning as error

in the MGPoissonSolver deprecated methods are used

src/Solvers/MGPoissonSolver.cpp

@@ -372,8 +372,15 @@ void MGPoissonSolver::computePotential(Field_t &rho, Vector_t hr) {
     // build discretization matrix
     INFOMSG(level3 << "* Building Discretization Matrix..." << endl);
     IpplTimings::startTimer(FunctionTimer4_m);
+#if defined(__clang__)
+# pragma clang diagnostic push
+# pragma clang diagnostic warning "-Wdeprecated-declarations"
+#endif
     if (Teuchos::is_null(A))
         A = rcp(new TpetraCrsMatrix_t(map_p,  7, Tpetra::StaticProfile));
+#if defined(__clang__)
+# pragma clang diagnostic pop
+#endif
     ComputeStencil(hr, RHS);
     IpplTimings::stopTimer(FunctionTimer4_m);
     INFOMSG(level3 << "* Done." << endl);
@@ -521,7 +528,15 @@ void MGPoissonSolver::ComputeStencil(Vector_t /*hr*/, Teuchos::RCP<TpetraVector_
     A->resumeFill();
     A->setAllToScalar(0.0);
 
+#if defined(__clang__)
+# pragma clang diagnostic push
+# pragma clang diagnostic warning "-Wdeprecated-declarations"
+#endif
     int NumMyElements = map_p->getNodeNumElements();
+#if defined(__clang__)
+# pragma clang diagnostic pop
+#endif
+
     auto MyGlobalElements = map_p->getMyGlobalIndices();
 
     std::vector<TpetraScalar_t> Values(6);
@@ -590,8 +605,16 @@ void MGPoissonSolver::ComputeStencil(Vector_t /*hr*/, Teuchos::RCP<TpetraVector_
 void MGPoissonSolver::printLoadBalanceStats() {
 
     //compute some load balance statistics
+    
+#if defined(__clang__)
+# pragma clang diagnostic push
+# pragma clang diagnostic warning "-Wdeprecated-declarations"
+#endif
     size_t myNumPart = map_p->getNodeNumElements();
     size_t NumPart = map_p->getGlobalNumElements() * 1.0 / comm_mp->getSize();
+#if defined(__clang__)
+# pragma clang diagnostic pop
+#endif
     double imbalance = 1.0;
     if (myNumPart >= NumPart)
         imbalance += (myNumPart - NumPart) / NumPart;