extern int fio_client_add(struct client_ops *, const char *, void **);
extern struct fio_client *fio_client_add_explicit(struct client_ops *, const char *, int, int);
extern void fio_client_add_cmd_option(void *, const char *);
extern int fio_client_add(struct client_ops *, const char *, void **);
extern struct fio_client *fio_client_add_explicit(struct client_ops *, const char *, int, int);
extern void fio_client_add_cmd_option(void *, const char *);