As per the discussion on the devel telecon, do not compute ompi_comm_world_thread_level_mult if thread multiple is disabled. We aren't using the value anyway, but we will leave the current code in-place until we understand if it is needed or not.

This commit was SVN r29080.

ompi/communicator/comm_cid.c

@@ -121,6 +121,7 @@ static int ompi_comm_world_thread_level_mult=0;
 
 int ompi_comm_cid_init (void)
 {
+#if OMPI_ENABLE_THREAD_MULTIPLE
     ompi_proc_t **procs, *thisproc;
     uint8_t thread_level;
     void *tlpointer;
@@ -154,7 +155,9 @@ int ompi_comm_cid_init (void)
         }
     }
     free(procs);
-
+#else
+    ompi_comm_world_thread_level_mult = 0; // silence compiler warning if not used
+#endif
     return OMPI_SUCCESS;
 }