From 4d87dcc08d73a122d3fc676504ec6b0a2ecb0e8a Mon Sep 17 00:00:00 2001
From: heltai <heltai@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Thu, 4 Jul 2013 12:38:52 +0000
Subject: [PATCH] Wrapped MPI_COMM_WORLD definition around an #ifdef. Trilinos
 already defines this if we are serial, and we get warnings with multiple
 definitions.

git-svn-id: https://svn.dealii.org/trunk@29937 0785d39b-7218-0410-832d-ea1e28bc413d
---
 deal.II/include/deal.II/base/index_set.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/deal.II/include/deal.II/base/index_set.h b/deal.II/include/deal.II/base/index_set.h
index f94354eb7a..f2d53a3a23 100644
--- a/deal.II/include/deal.II/base/index_set.h
+++ b/deal.II/include/deal.II/base/index_set.h
@@ -26,7 +26,9 @@
 #include <mpi.h>
 #else
 typedef int MPI_Comm;
-#define MPI_COMM_WORLD 0
+#  ifndef MPI_COMM_WORLD
+#    define MPI_COMM_WORLD 0
+#  endif
 #endif
 
 DEAL_II_NAMESPACE_OPEN
-- 
2.39.5