From: Luca Heltai <luca.heltai@sissa.it>
Date: Thu, 4 Jul 2013 12:38:52 +0000 (+0000)
Subject: Wrapped MPI_COMM_WORLD definition around an #ifdef. Trilinos already defines this... 
X-Git-Tag: v8.0.0~183
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=42a00bd09810adbf4889d4e75d2272952badf0ed;p=dealii.git

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
---

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