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-rw-r--r--src/comm/CactusDefaultComm.c3
-rw-r--r--src/configuration.ccl3
-rw-r--r--src/main/ProcessEnvironment.c3
-rw-r--r--src/main/ShutdownCactus.c3
4 files changed, 9 insertions, 3 deletions
diff --git a/src/comm/CactusDefaultComm.c b/src/comm/CactusDefaultComm.c
index b3d341c9..330cdcbe 100644
--- a/src/comm/CactusDefaultComm.c
+++ b/src/comm/CactusDefaultComm.c
@@ -9,6 +9,7 @@
@@*/
+#include "cctk_Capabilities.h"
#include "cctk_Flesh.h"
#include "cctk_Groups.h"
#include "cctk_Constants.h"
@@ -29,7 +30,7 @@
#endif
#ifdef CCTK_MPI
-#include "mpi.h"
+# include <mpi.h>
#endif
static const char *rcsid = "$Header$";
diff --git a/src/configuration.ccl b/src/configuration.ccl
index e69de29b..3b95dd47 100644
--- a/src/configuration.ccl
+++ b/src/configuration.ccl
@@ -0,0 +1,3 @@
+OPTIONAL MPI
+{
+}
diff --git a/src/main/ProcessEnvironment.c b/src/main/ProcessEnvironment.c
index 64be6f14..97ec4e2e 100644
--- a/src/main/ProcessEnvironment.c
+++ b/src/main/ProcessEnvironment.c
@@ -11,10 +11,11 @@
#include <stdio.h>
#include <stdlib.h>
+#include "cctk_Capabilities.h"
#include "cctk_Flesh.h"
#ifdef CCTK_MPI
-#include "mpi.h"
+# include <mpi.h>
#endif
static const char *rcsid = "$Header$";
diff --git a/src/main/ShutdownCactus.c b/src/main/ShutdownCactus.c
index 1e61224c..df7a347e 100644
--- a/src/main/ShutdownCactus.c
+++ b/src/main/ShutdownCactus.c
@@ -13,13 +13,14 @@
#include <stdio.h>
#include <stdlib.h>
+#include "cctk_Capabilities.h"
#include "cctk_Flesh.h"
#include "cctk_Misc.h"
#include "cctk_Parameters.h"
#include "cctk_Schedule.h"
#ifdef CCTK_MPI
-#include "mpi.h"
+# include "mpi.h"
#endif
static const char *rcsid = "$Header$";