#ifdef ALLOW_USE_MPI
# ifdef ALLOW_USE_MPI
#elif (defined (GLOBAL_SUM_ORDER_TILES) defined (ALLOW_USE_MPI) )
#if (defined (GLOBAL_SUM_SEND_RECV) defined (ALLOW_USE_MPI) )
# elif (defined (ALLOW_USE_MPI) defined (USE_MPI_WTIME))