SR_PRIV int std_cleanup(const struct sr_dev_driver *di);
#ifdef HAVE_LIBSERIALPORT
SR_PRIV int std_serial_dev_open(struct sr_dev_inst *sdi);
SR_PRIV int std_cleanup(const struct sr_dev_driver *di);
#ifdef HAVE_LIBSERIALPORT
SR_PRIV int std_serial_dev_open(struct sr_dev_inst *sdi);