extern rtx spu_function_value (const_tree type, const_tree func);
extern rtx spu_function_arg (int cum, enum machine_mode mode, tree type,
int named);
-extern void spu_va_start (tree valist, rtx nextarg);
extern void spu_setup_incoming_varargs (int *cum, enum machine_mode mode,
tree type, int *pretend_size,
int no_rtl);