From 54e52a86a8ccf6c6839854db03530071bcf998cb Mon Sep 17 00:00:00 2001
From: Daniel Arndt <daniel.arndt@iwr.uni-heidelberg.de>
Date: Wed, 19 Sep 2018 23:54:23 +0200
Subject: [PATCH] Support older Trilinos versions

---
 .../lac/trilinos_tpetra_communication_pattern.h        |  1 +
 source/base/index_set.cc                               |  4 ++--
 source/lac/trilinos_tpetra_vector.cc                   | 10 +++++++---
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/include/deal.II/lac/trilinos_tpetra_communication_pattern.h b/include/deal.II/lac/trilinos_tpetra_communication_pattern.h
index 8dc7cf7874..a3a23726fe 100644
--- a/include/deal.II/lac/trilinos_tpetra_communication_pattern.h
+++ b/include/deal.II/lac/trilinos_tpetra_communication_pattern.h
@@ -25,6 +25,7 @@
 
 #    include <deal.II/lac/communication_pattern_base.h>
 
+#    include <Tpetra_Export.hpp>
 #    include <Tpetra_Import.hpp>
 
 #    include <memory>
diff --git a/source/base/index_set.cc b/source/base/index_set.cc
index 6fe2920ffe..143efc6dc6 100644
--- a/source/base/index_set.cc
+++ b/source/base/index_set.cc
@@ -571,9 +571,9 @@ IndexSet::make_tpetra_map(const MPI_Comm &communicator,
       fill_index_vector(indices);
       std::vector<int> int_indices(indices.size());
       std::copy(indices.begin(), indices.end(), int_indices.begin());
+      const Teuchos::ArrayView<int> arr_view(int_indices);
       return Tpetra::Map<>(size(),
-                           (n_elements() > 0 ? int_indices.data() : nullptr),
-                           n_elements(),
+                           arr_view,
                            0,
 #  ifdef DEAL_II_WITH_MPI
                            Teuchos::rcp(new Teuchos::MpiComm<int>(communicator))
diff --git a/source/lac/trilinos_tpetra_vector.cc b/source/lac/trilinos_tpetra_vector.cc
index 88324e6d53..dae177f7e5 100644
--- a/source/lac/trilinos_tpetra_vector.cc
+++ b/source/lac/trilinos_tpetra_vector.cc
@@ -561,9 +561,13 @@ namespace LinearAlgebra
       else if (vector->getLocalLength() > 0)
         {
           const size_type n_indices = vector->getLocalLength();
-          auto vector_indices       = vector->getMap()->getMyGlobalIndices();
-          is.add_indices((unsigned int *)&vector_indices[0],
-                         (unsigned int *)&vector_indices[0] + n_indices);
+          std::vector<types::global_dof_index> vector_indices;
+          vector_indices.reserve(n_indices);
+          for (unsigned int i = 0; i < n_indices; ++i)
+            vector_indices.push_back(vector->getMap()->getGlobalElement(i));
+
+          is.add_indices(vector_indices.data(),
+                         vector_indices.data() + n_indices);
         }
       is.compress();
 
-- 
2.39.5