gcc 4.8 gives the following error when building xen/common/compat/memory.c

memory.c: In function 'compat_memory_op':
/builddir/build/BUILD/xen-4.2.1/xen/include/public/arch-x86/xen.h:35:33: error: typedef '__guest_handle_const_compat_memory_exchange_t' locally defined but not used [-Werror=unused-local-typedefs]
     typedef struct { type *p; } __guest_handle_ ## name
                                 ^
/builddir/build/BUILD/xen-4.2.1/xen/include/public/arch-x86/xen.h:43:5: note: in expansion of macro '___DEFINE_XEN_GUEST_HANDLE'
     ___DEFINE_XEN_GUEST_HANDLE(const_##name, const type)
     ^
/builddir/build/BUILD/xen-4.2.1/xen/include/public/arch-x86/xen.h:44:41: note: in expansion of macro '__DEFINE_XEN_GUEST_HANDLE'
 #define DEFINE_XEN_GUEST_HANDLE(name)   __DEFINE_XEN_GUEST_HANDLE(name, name)
                                         ^
memory.c:261:13: note: in expansion of macro 'DEFINE_XEN_GUEST_HANDLE'
             DEFINE_XEN_GUEST_HANDLE(compat_memory_exchange_t);
             ^

The error is harmless in this case so turn the check off.

Signed-off-by: Michael Young <m.a.young@xxxxxxxxxxxx>

--- xen-4.2.1/Config.mk.orig	2013-02-08 20:07:25.006716975 +0000
+++ xen-4.2.1/Config.mk	2013-02-08 20:13:52.184876582 +0000
@@ -166,6 +166,7 @@
 $(call cc-option-add,HOSTCFLAGS,HOSTCC,-Wdeclaration-after-statement)
 $(call cc-option-add,CFLAGS,CC,-Wdeclaration-after-statement)
 $(call cc-option-add,CFLAGS,CC,-Wno-unused-but-set-variable)
+$(call cc-option-add,CFLAGS,CC,-Wno-unused-local-typedefs)
 
 LDFLAGS += $(foreach i, $(EXTRA_LIB), -L$(i)) 
 CFLAGS += $(foreach i, $(EXTRA_INCLUDES), -I$(i))