Internal SHM comms in non-simd directions working

Need to fix simd directions

lib/communicator/Communicator_mpi.cc

@@ -67,6 +67,14 @@ CartesianCommunicator::CartesianCommunicator(const std::vector<int> &processors)
   
   assert(Size==_Nprocessors);
 }
+void *CartesianCommunicator::ShmBufferSelf(void)
+{
+  return NULL;
+}
+void *CartesianCommunicator::ShmBuffer(int rank)
+{
+  return NULL;
+}
 
 void CartesianCommunicator::GlobalSum(uint32_t &u){
   int ierr=MPI_Allreduce(MPI_IN_PLACE,&u,1,MPI_UINT32_T,MPI_SUM,communicator);