Untested bustage fix for mac+mailnews, from bug 384513

mailnews/build/Makefile.in

@@ -141,7 +141,10 @@ EXTRA_DSO_LDOPTS = \
 		$(NULL)
 
 ifneq (,$(filter mac cocoa,$(MOZ_WIDGET_TOOLKIT)))
-		EXTRA_DSO_LDOPTS += $(TK_LIBS)
+EXTRA_DSO_LDOPTS += \
+  $(DEPTH)/xpcom/MoreFiles/libmacmorefiles_s.a \
+  $(TK_LIBS) \
+  $(NULL)
 endif 
 
 LOCAL_INCLUDES = -I$(srcdir) \