From f9b9203f65634145a939322ef79740da19440251 Mon Sep 17 00:00:00 2001
From: bangerth <bangerth@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Fri, 23 Sep 2011 18:23:54 +0000
Subject: [PATCH] Allow compilation when using MPI but not p4est.

git-svn-id: https://svn.dealii.org/trunk@24399 0785d39b-7218-0410-832d-ea1e28bc413d
---
 deal.II/include/deal.II/distributed/tria.h |  9 +++++++++
 deal.II/source/distributed/tria.cc         | 11 +++++++++++
 2 files changed, 20 insertions(+)

diff --git a/deal.II/include/deal.II/distributed/tria.h b/deal.II/include/deal.II/distributed/tria.h
index f0c3266e02..62d91ad0c6 100644
--- a/deal.II/include/deal.II/distributed/tria.h
+++ b/deal.II/include/deal.II/distributed/tria.h
@@ -808,6 +808,15 @@ namespace parallel
 					  * on other processors.
 					  */
 	types::subdomain_id_t locally_owned_subdomain () const;
+
+					 /**
+					  * Return the MPI
+					  * communicator used by this
+					  * triangulation.
+					  */
+#ifdef DEAL_II_COMPILER_SUPPORTS_MPI
+	MPI_Comm get_communicator () const;
+#endif
     };
   }
 }
diff --git a/deal.II/source/distributed/tria.cc b/deal.II/source/distributed/tria.cc
index fdd9f503d2..7f7663a016 100644
--- a/deal.II/source/distributed/tria.cc
+++ b/deal.II/source/distributed/tria.cc
@@ -3041,6 +3041,17 @@ namespace parallel
       Assert (false, ExcNotImplemented());
       return 0;
     }
+
+
+#ifdef DEAL_II_COMPILER_SUPPORTS_MPI
+    template <int dim, int spacedim>
+    MPI_Comm
+    Triangulation<dim,spacedim>::get_communicator () const
+    {
+      Assert (false, ExcNotImplemented());
+      return MPI_COMM_WORLD;
+    }
+#endif
   }
 }
 
-- 
2.39.5