Changed back to openmpi-1.2.6 now it is out of git.

etc/settings.csh

@@ -157,7 +157,7 @@ endif
 
 switch ("$WM_MPLIB")
 case OPENMPI:
-    set ompi_version=1.2.5
+    set ompi_version=1.2.6
     setenv OPENMPI_HOME $FOAM_SRC/other/openmpi-$ompi_version
     setenv OPENMPI_ARCH_PATH $OPENMPI_HOME/platforms/$WM_OPTIONS
 

etc/settings.sh

@@ -158,7 +158,7 @@ export FOAMX_CONFIG
 
 case "$WM_MPLIB" in
 OPENMPI)
-    ompi_version=1.2.5
+    ompi_version=1.2.6
     export OPENMPI_HOME=$FOAM_SRC/other/openmpi-$ompi_version
     export OPENMPI_ARCH_PATH=$OPENMPI_HOME/platforms/$WM_OPTIONS