extern char * (*readline_hook) PARAMS ((char *));
extern void (*readline_end_hook) PARAMS ((void));
extern void (*register_changed_hook) PARAMS ((int regno));
-extern void (*disassembly_flavor_hook) PARAMS((char *args, int from_tty));
extern void (*memory_changed_hook) PARAMS ((CORE_ADDR addr, int len));
extern void (*context_hook) PARAMS ((int));
extern int (*target_wait_hook) PARAMS ((int pid,