For the autogen-challenged (i.e., Jeff), create a new ORTE constant that tells the user that a required module was not found. Update the errmgr select function to output the error if no module is found.

This commit was SVN r23032.

orte/include/orte/constants.h

@@ -100,7 +100,8 @@ enum {
     ORTE_ERR_HNP_COULD_NOT_START            = (ORTE_ERR_BASE - 28),
     ORTE_ERR_SYS_LIMITS_SOCKETS             = (ORTE_ERR_BASE - 29),
     ORTE_ERR_SOCKET_NOT_AVAILABLE           = (ORTE_ERR_BASE - 30),
-    ORTE_ERR_SYSTEM_WILL_BOOTSTRAP          = (ORTE_ERR_BASE - 31)
+    ORTE_ERR_SYSTEM_WILL_BOOTSTRAP          = (ORTE_ERR_BASE - 31),
+    ORTE_ERR_MODULE_NOT_FOUND               = (ORTE_ERR_BASE - 32)
 };
 
 #define ORTE_ERR_MAX                      (ORTE_ERR_BASE - 100)

orte/mca/errmgr/base/errmgr_base_select.c

@@ -57,7 +57,8 @@ int orte_errmgr_base_select(void)
     orte_errmgr_base_select_module_t *tmp_module = NULL, *tmp_module_sw = NULL;
     opal_pointer_array_t tmp_array;
     orte_errmgr_base_module_t *i_module = NULL;
-
+    bool none_found;
+    
     OBJ_CONSTRUCT(&tmp_array, opal_pointer_array_t);
 
     opal_output_verbose(10, orte_errmgr_base_output,
@@ -67,6 +68,7 @@ int orte_errmgr_base_select(void)
      * Traverse the list of available components.
      * For each call their 'query' functions to determine relative priority.
      */
+    none_found = true;
     for (item  = opal_list_get_first(&orte_errmgr_base_components_available);
          item != opal_list_get_end(&orte_errmgr_base_components_available);
          item  = opal_list_get_next(item) ) {
@@ -114,8 +116,14 @@ int orte_errmgr_base_select(void)
         tmp_module->priority  = priority;
 
         opal_pointer_array_add(&tmp_array, (void*)tmp_module);
+        none_found = false;
     }
 
+    if (none_found) {
+        /* must have at least one module */
+        return ORTE_ERR_MODULE_NOT_FOUND;
+    }
+    
     /*
      * Sort the list by decending priority
      */

orte/util/error_strings.c

@@ -126,6 +126,10 @@ const char *orte_err2str(int errnum)
     case ORTE_ERR_SYSTEM_WILL_BOOTSTRAP:
         retval = "System will determine resources during bootstrap of daemons";
         break;
+    case ORTE_ERR_MODULE_NOT_FOUND:
+        retval = "Framework requires at least one active module, but none found";
+        break;
+
     default:
         retval = NULL;
     }