re PR target/40068 (GCC fails to apply dllexport attribute to typeinfo.)

2012-02-07  Kai Tietz  <ktietz@redhat.com>
            Dave Korn  <dave.korn.cygwin@gmail.com>

        PR target/40068
        * config/i386/winnt-cxx.c (i386_pe_adjust_class_at_definition):
        Take care that typinfo gets dllexport-attribute.

Co-Authored-By: Dave Korn <dave.korn.cygwin@gmail.com>

From-SVN: r183962

gcc/ChangeLog

+2012-02-07  Kai Tietz  <ktietz@redhat.com>
+            Dave Korn  <dave.korn.cygwin@gmail.com>
+
+	PR target/40068
+	* config/i386/winnt-cxx.c (i386_pe_adjust_class_at_definition):
+	Take care that typinfo gets dllexport-attribute.
+
 2012-02-07  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/52074

gcc/config/i386/winnt-cxx.c

@@ -97,6 +97,20 @@ i386_pe_adjust_class_at_definition (tree t)
  
   if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (t)) != NULL_TREE)
     {
+      tree tmv = TYPE_MAIN_VARIANT (t);
+
+      /* Make sure that we set dllexport attribute to typeinfo's
+	 base declaration, as otherwise it would fail to be exported as
+	 it isn't a class-member.  */
+      if (tmv != NULL_TREE
+	  && CLASSTYPE_TYPEINFO_VAR (tmv) != NULL_TREE)
+	{
+	  tree na, ti_decl = CLASSTYPE_TYPEINFO_VAR (tmv);
+	  na = tree_cons (get_identifier ("dllexport"), NULL_TREE,
+			  NULL_TREE);
+	  decl_attributes (&ti_decl, na, 0);
+	}
+
       /* Check static VAR_DECL's.  */
       for (member = TYPE_FIELDS (t); member; member = DECL_CHAIN (member))
 	if (TREE_CODE (member) == VAR_DECL)