Add mpi protection

control/control.c

@@ -104,10 +104,13 @@ int MORSE_InitPar(int ncpus, int ncudas, int nthreads_per_worker)
     }
 #  endif
 #endif
+
     RUNTIME_init( morse, ncpus, ncudas, nthreads_per_worker );
 
+#if defined(CHAMELEON_USE_MPI)
     morse->my_mpi_rank   = RUNTIME_comm_rank( morse );
     morse->mpi_comm_size = RUNTIME_comm_size( morse );
+#endif
 
     return MORSE_SUCCESS;
 }