* make btl open be safe to call multiple times (btl close already was)

* add btl back into ompi_info.  Since it now directly calls the
  open/close, the missing symbol problems Ralph was seeing when ob1 is
  ignored will not occur.

This commit was SVN r6652.

ompi/mca/btl/base/btl_base_open.c

@@ -69,6 +69,7 @@ char* mca_btl_base_exclude = NULL;
 opal_list_t mca_btl_base_components_opened;
 opal_list_t mca_btl_base_modules_initialized;
 
+static bool already_opened = false;
 
 /**
  * Function for finding and opening either all MCA components, or the one
@@ -76,6 +77,9 @@ opal_list_t mca_btl_base_modules_initialized;
  */
 int mca_btl_base_open(void)
 {
+    if (already_opened) return OMPI_SUCCESS;
+    already_opened = true;
+
   /* Open up all available components */
 
   if (OMPI_SUCCESS != 

ompi/tools/ompi_info/components.cc

@@ -200,12 +200,8 @@ void ompi_info::open_components()
    */
   component_map["ptl"] = &mca_ptl_base_components_opened;
 
-#if 0
+  mca_btl_base_open();
-  /* mca_btl_base_open() should not be called directly. This call is performed
-   * in the PML base open.
-   */
   component_map["btl"] = &mca_btl_base_components_opened;
-#endif
 
   mca_topo_base_open();
   component_map["topo"] = &mca_topo_base_components_opened;
@@ -227,7 +223,7 @@ void ompi_info::close_components()
 
         mca_topo_base_close();
         // the PML has to call the base PTL close function.
-        // the PML has to call the base BTL close function.
+        mca_btl_base_close();
         mca_pml_base_close();
         mca_mpool_base_close();
         mca_io_base_close();