* Be nice to users and resolve "localhost" or "127.0.0.1" to the current

node, since the default hostfile shipped with Open MPI contains only
  "localhost".  This is performed after all the other checks, so it should
  only get activated as a last-ditch effort.

This commit was SVN r3758.

src/mca/pcm/bproc/src/pcm_bproc_spawn.c

@@ -21,6 +21,7 @@
 #include <fcntl.h>
 #include <sys/bproc.h>
 #include <sys/wait.h>
+#include <string.h>
 
 #include "pcm_bproc.h"
 #include "mca/pcm/pcm.h"
@@ -288,6 +289,12 @@ internal_set_nodelist(ompi_list_t *host_list,
         }
 have_node_list_entry:
 
+        /* last ditch, see if we have a localhost entry */
+        if (strncmp("localhost", host->hostname, strlen("localhost")) == 0 ||
+            strcmp("127.0.0.1", host->hostname) == 0) {
+            resolved_node = bproc_currnode();
+        }
+
         if (BPROC_NODE_NONE == resolved_node) {
             printf("Unable to resolve node %s\n", host->hostname);
             return OMPI_ERR_NOT_FOUND;