COMP: no explicit handling of mpi-profiling for openmpi (fixes #18)

- previously explicitly disabled mpi-profiling, but now let openmpi
  configure it itself.

- add config support for mpi-threads

makeOPENMPI

@@ -71,6 +71,9 @@ _foamEtc config.sh/mpi
 
 mpiPACKAGE=${FOAM_MPI:-openmpi-system}
 
+# Configure with/without mpi-threads
+unset optMpiThreads
+
 #------------------------------------------------------------------------------
 usage() {
     exec 1>&2
@@ -80,6 +83,8 @@ usage() {
 usage: ${0##*/} [OPTION] [openmpi-VERSION]
 options:
   -gcc              force gcc/g++ instead of the values from \$WM_CC, \$WM_CXX
+  -no-thread        disable multiple mpi threads
+  -thread           enable multiple mpi threads
   -help
 
 * build openmpi with
@@ -100,6 +105,8 @@ do
     '') ;;      # Ignore empty
     -h | -help) usage   ;;
     -gcc)       useGcc  ;;
+    -no-thread*) optMpiThreads=disable ;;
+    -thread*)    optMpiThreads=enable ;;
 
     openmpi-[0-9]* | openmpi_[0-9]* | openmpi-system )
         mpiPACKAGE="${1%%/}"
@@ -136,10 +143,10 @@ MPI_ARCH_PATH=$installBASE/$mpiPACKAGE
 
 if [ -r "$MPI_ARCH_PATH/lib$WM_COMPILER_LIB_ARCH/libmpi.so" ]
 then
-    echo "Already has shared library"
+    echo "Already has shared library: $MPI_ARCH_PATH"
 elif [ -r "$MPI_ARCH_PATH/lib$WM_COMPILER_LIB_ARCH/libmpi.a" ]
 then
-    echo "Already has static library"
+    echo "Already has static library: $MPI_ARCH_PATH"
 else
     echo "Starting build: $WM_MPLIB ($mpiPACKAGE)"
     echo
@@ -157,6 +164,12 @@ else
             configOpt="$configOpt --with-verbs=$ibDir --with-verbs-lib=$ibLib"
         fi
 
+        # Explicitly enable/disable multiple mpi threads
+        if [ -n "$optMpiThreads" ]
+        then
+            configOpt="$configOpt -${optMpiThreads}-mpi-thread-multiple"
+        fi
+
         # end of configuration options
         # ----------------------------
 
@@ -178,7 +191,6 @@ else
             --disable-orterun-prefix-by-default \
             --enable-shared --disable-static \
             --enable-mpi-fortran=none \
-            --disable-mpi-profile \
             $configOpt \
         && set +x \
         && make -j $WM_NCOMPPROCS \