pt.c (pop_tinst_level): Call extract_interface_info.

	* pt.c (pop_tinst_level): Call extract_interface_info.
	(instantiate_decl): Don't save and restore file position.
	* decl.c (cp_finish_decl): Make statics in extern inlines and
	templates common, if possible and the target doesn't support weak
	symbols.

From-SVN: r22824

gcc/cp/ChangeLog

 1998-10-04  Jason Merrill  <jason@yorick.cygnus.com>
 
+	* pt.c (pop_tinst_level): Call extract_interface_info.
+	(instantiate_decl): Don't save and restore file position.
+
+	* decl.c (cp_finish_decl): Make statics in extern inlines and
+	templates common, if possible and the target doesn't support weak
+	symbols.
+
 	* decl.c (grokdeclarator): Remove redundant calls to
 	build_type_variant and some duplicated code.
 	* sig.c (build_signature_reference_type): Only take the type parm.

gcc/cp/decl.c

@@ -7298,20 +7298,52 @@ cp_finish_decl (decl, init, asmspec_tree, need_pop, flags)
       if (was_temp)
 	end_temporary_allocation ();
 
-      /* Extern inline function static data has external linkage.
-         Instead of trying to deal with that, we disable inlining of
-         such functions.  The ASM_WRITTEN check is to avoid hitting this
-         for __FUNCTION__.  */
+      /* Static data in a function with comdat linkage also has comdat
+         linkage.  */
       if (TREE_CODE (decl) == VAR_DECL
 	  && TREE_STATIC (decl)
+	  /* Don't mess with __FUNCTION__.  */
 	  && ! TREE_ASM_WRITTEN (decl)
 	  && current_function_decl
 	  && DECL_CONTEXT (decl) == current_function_decl
-	  && DECL_THIS_INLINE (current_function_decl)
+	  && (DECL_THIS_INLINE (current_function_decl)
+	      || DECL_TEMPLATE_INSTANTIATION (current_function_decl))
 	  && TREE_PUBLIC (current_function_decl))
 	{
+	  /* Rather than try to get this right with inlining, we suppress
+	     inlining of such functions.  */
 	  current_function_cannot_inline
 	    = "function with static variable cannot be inline";
+
+	  /* If flag_weak, we don't need to mess with this, as we can just
+	     make the function weak, and let it refer to its unique local
+	     copy.  This works because we don't allow the function to be
+	     inlined.  */
+	  if (! flag_weak)
+	    {
+	      if (DECL_INTERFACE_KNOWN (current_function_decl))
+		{
+		  TREE_PUBLIC (decl) = 1;
+		  DECL_EXTERNAL (decl) = DECL_EXTERNAL (current_function_decl);
+		}
+	      else if (DECL_INITIAL (decl) == NULL_TREE
+		       || DECL_INITIAL (decl) == error_mark_node)
+		{
+		  TREE_PUBLIC (decl) = 1;
+		  DECL_COMMON (decl) = 1;
+		}
+	      /* else we lose. We can only do this if we can use common,
+                 which we can't if it has been initialized.  */
+
+	      if (TREE_PUBLIC (decl))
+		DECL_ASSEMBLER_NAME (decl)
+		  = build_static_name (current_function_decl, DECL_NAME (decl));
+	      else if (! DECL_ARTIFICIAL (decl))
+		{
+		  cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl);
+		  cp_warning_at ("  you can work around this by removing the initializer"), decl;
+		}
+	    }
 	}
 
       else if (TREE_CODE (decl) == VAR_DECL

gcc/cp/pt.c

@@ -3995,6 +3995,7 @@ pop_tinst_level ()
      this instantiation.  */
   lineno = old->line;
   input_filename = old->file;
+  extract_interface_info ();
   
   current_tinst_level = old->next;
   old->next = free_tinst_level;
@@ -8004,8 +8005,6 @@ instantiate_decl (d)
   tree gen_tmpl;
   int nested = in_function_p ();
   int pattern_defined;
-  int line = lineno;
-  char *file = input_filename;
 
   /* This function should only be used to instantiate templates for
      functions and static member variables.  */
@@ -8142,9 +8141,6 @@ instantiate_decl (d)
     {
       /* Defer all templates except inline functions used in another
          function.  */
-      lineno = line;
-      input_filename = file;
-
       if (at_eof && !pattern_defined 
 	  && DECL_EXPLICIT_INSTANTIATION (d))
 	/* [temp.explicit]
@@ -8217,9 +8213,6 @@ instantiate_decl (d)
     }
 
 out:
-  lineno = line;
-  input_filename = file;
-
   pop_from_top_level ();
   pop_tinst_level ();