Don't require the existence of a multicast interface if --enable-multicast wasn't specified.

This commit was SVN r23494.

orte/mca/rmcast/base/rmcast_base_open.c

@@ -82,10 +82,12 @@ orte_rmcast_module_t orte_rmcast = {
 orte_rmcast_base_t orte_rmcast_base;
 static bool opened=false;
 
+
 /**
  * Function for finding and opening either all MCA components, or the one
  * that was specifically requested via a MCA parameter.
  */
+#if ORTE_ENABLE_MULTICAST
 int orte_rmcast_base_open(void)
 {
     int value, pval, i;
@@ -294,7 +296,47 @@ int orte_rmcast_base_open(void)
     /* All done */
     return ORTE_SUCCESS;
 }
+#else
+int orte_rmcast_base_open(void)
+{
+    int i;
     
+    if (opened) {
+        /* ensure we don't go through here twice */
+        return ORTE_SUCCESS;
+    }
+    opened = true;
+    orte_rmcast_base.opened = true;
+    
+    /* ensure all global values are initialized */
+    OBJ_CONSTRUCT(&orte_rmcast_base.lock, opal_mutex_t);
+    OBJ_CONSTRUCT(&orte_rmcast_base.cond, opal_condition_t);
+    orte_rmcast_base.active = false;
+    OBJ_CONSTRUCT(&orte_rmcast_base.recvs, opal_list_t);
+    OBJ_CONSTRUCT(&orte_rmcast_base.channels, opal_list_t);
+
+    orte_rmcast_base.xmit_network = 0;
+    orte_rmcast_base.my_group_name = NULL;
+    orte_rmcast_base.my_group_number = 0;
+    orte_rmcast_base.interface = 0;
+    for (i=0; i < 255; i++) {
+        orte_rmcast_base.ports[i] = 0;
+    }
+    orte_rmcast_base.my_output_channel = NULL;
+    orte_rmcast_base.my_input_channel = NULL;
+
+    /* Open up all available components */
+    if (ORTE_SUCCESS != 
+        mca_base_components_open("rmcast", orte_rmcast_base.rmcast_output,
+                                 mca_rmcast_base_static_components, 
+                                 &orte_rmcast_base.rmcast_opened, true)) {
+        return ORTE_ERROR;
+    }
+
+    /* All done */
+    return ORTE_SUCCESS;
+}
+#endif
 
 /****    CLASS INSTANCES    ****/
 static void mcast_event_constructor(orte_mcast_msg_event_t *ev)