[PATCH] Slight modification of namespace patch

[Daniel Berlin <dan at cgsoftware dot com>]

This adds support for namespace aliases.
I only changed gen_namespace_die.
It now looks like this:

*************** is_redundant_typedef (decl)
*** 10795,10800 ****
--- 10802,10845 ----
    return 0;
  }
  
+ /* Generate a DIE for a namespace or namespace alias */
+ static void
+ gen_namespace_die (decl, context_die)
+      register tree decl;
+      register dw_die_ref context_die;
+ {
+   /* Namespace aliases have a DECL_ABSTRACT_ORIGIN of the namespace
+      they are an alias of.*/
+   if (DECL_ABSTRACT_ORIGIN (decl) == NULL)
+     {
+       /* Output a real namespace */
+       dw_die_ref namespace_die = new_die (DW_TAG_namespace, context_die);
+       add_name_and_src_coords_attributes (namespace_die, decl);
+       equate_decl_number_to_die (decl, namespace_die);
+     }
+   else
+     {
+       /* Output a namespace alias */
+       dw_die_ref namespace_die;
+       
+       /* Force out the namespace we are an alias of, if necessary */
+       dw_die_ref origin_die = lookup_decl_die  (DECL_ABSTRACT_ORIGIN (decl));
+       if (!origin_die)
+ 	{
+ 	  /* Attempt to force out origin. */
+ 	  dwarf2out_decl (DECL_ABSTRACT_ORIGIN (decl));
+ 	  origin_die = lookup_decl_die (DECL_ABSTRACT_ORIGIN (decl));
+ 	  if (!origin_die)
+ 	    abort();
+ 	}
+       /* Now create the namespace alias DIE. */
+       namespace_die = new_die (DW_TAG_imported_declaration, context_die);
+       add_name_and_src_coords_attributes (namespace_die, decl);
+       add_AT_die_ref (namespace_die, DW_AT_import, origin_die);
+       equate_decl_number_to_die (decl, namespace_die);
+     }
+ }
+ 
  /* Generate Dwarf debug information for a decl described by DECL.  */
  
  static void

-- 
"This is my impression of a bowling ball...  (Drags the mike
along the floor, then lifts it...)  Gutter...
"-Steven Wright