re PR fortran/45674 ([OOP] Undefined references for extended types)

2010-09-16  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/45674
	* interface.c (compare_parameter): Create vtab for actual argument,
	instead of formal (if needed).


2010-09-16  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/45674
	* gfortran.dg/class_dummy_2.f03: New.

From-SVN: r164338

gcc/fortran/ChangeLog

+2010-09-16  Janus Weil  <janus@gcc.gnu.org>
+
+	PR fortran/45674
+	* interface.c (compare_parameter): Create vtab for actual argument,
+	instead of formal (if needed).
+
 2010-09-15  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/45577

gcc/fortran/interface.c

@@ -1428,10 +1428,10 @@ compare_parameter (gfc_symbol *formal, gfc_expr *actual,
       && actual->ts.u.derived && actual->ts.u.derived->ts.is_iso_c)
     return 1;
 
-  if (formal->ts.type == BT_CLASS)
+  if (formal->ts.type == BT_CLASS && actual->ts.type == BT_DERIVED)
     /* Make sure the vtab symbol is present when
        the module variables are generated.  */
-    gfc_find_derived_vtab (formal->ts.u.derived);
+    gfc_find_derived_vtab (actual->ts.u.derived);
 
   if (actual->ts.type == BT_PROCEDURE)
     {

gcc/testsuite/ChangeLog

+2010-09-16  Janus Weil  <janus@gcc.gnu.org>
+
+	PR fortran/45674
+	* gfortran.dg/class_dummy_2.f03: New.
+
 2010-09-16  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/45623

gcc/testsuite/gfortran.dg/class_dummy_2.f03

+! { dg-do run }
+!
+! PR 45674: [OOP] Undefined references for extended types
+!
+! Contributed by Dietmar Ebner <dietmar.ebner@gmail.com>
+
+module fails_mod
+  implicit none 
+  type :: a_t
+     integer :: a
+  end type
+  type, extends(a_t) :: b_t
+     integer :: b
+  end type
+contains
+  subroutine foo(a)
+    class(a_t) :: a
+  end subroutine foo
+end module fails_mod
+
+module fails_test
+  implicit none
+contains
+  subroutine bar
+    use fails_mod
+    type(b_t) :: b
+    call foo(b)
+  end subroutine bar
+end module fails_test
+
+end
+
+! { dg-final { cleanup-modules "fails_mod fails_test" } }