diff -up glib-2.13.7/glib/gthread.c.ppc-cast glib-2.13.7/glib/gthread.c
--- glib-2.13.7/glib/gthread.c.ppc-cast	2007-07-12 21:43:31.000000000 -0400
+++ glib-2.13.7/glib/gthread.c	2007-07-12 21:43:45.000000000 -0400
@@ -223,11 +223,11 @@ void
 g_once_init_leave (volatile gsize *value_location,
                    gsize           initialization_value)
 {
-  g_return_if_fail (g_atomic_pointer_get (value_location) == 0);
+  g_return_if_fail (g_atomic_pointer_get ((gpointer*) value_location) == 0);
   g_return_if_fail (initialization_value != 0);
   g_return_if_fail (g_once_init_list != NULL);
 
-  g_atomic_pointer_set (value_location, initialization_value);
+  g_atomic_pointer_set ((gpointer*) value_location, (gpointer) initialization_value);
   g_mutex_lock (g_once_mutex);
   g_once_init_list = g_slist_remove (g_once_init_list, (gpointer*) value_location);
   g_cond_broadcast (g_once_cond);
@@ -255,7 +255,7 @@ g_static_mutex_get_mutex_impl (GMutex** 
   g_mutex_lock (g_once_mutex);
 
   if (!(*mutex))
-    g_atomic_pointer_set (mutex, g_mutex_new());
+    g_atomic_pointer_set ((gpointer*) mutex, g_mutex_new());
 
   g_mutex_unlock (g_once_mutex);
 
diff -up glib-2.13.7/glib/gthread.h.ppc-cast glib-2.13.7/glib/gthread.h
--- glib-2.13.7/glib/gthread.h.ppc-cast	2007-07-12 21:43:27.000000000 -0400
+++ glib-2.13.7/glib/gthread.h	2007-07-12 21:43:43.000000000 -0400
@@ -332,7 +332,7 @@ void                    g_once_init_leav
 G_INLINE_FUNC gboolean
 g_once_init_enter (volatile gsize *value_location)
 {
-  if G_LIKELY (g_atomic_pointer_get (value_location) !=0)
+  if G_LIKELY (g_atomic_pointer_get ((gpointer*) value_location) !=0)
     return FALSE;
   else
     return g_once_init_enter_impl (value_location);