extern int fio_show_option_help(const char *);
extern void fio_options_set_ioengine_opts(struct option *long_options, struct thread_data *td);
extern void fio_options_dup_and_init(struct option *);
+extern char *fio_option_dup_subs(const char *);
extern void fio_options_mem_dupe(struct thread_data *);
extern void td_fill_rand_seeds(struct thread_data *);
extern void td_fill_verify_state_seed(struct thread_data *);