int __attribute__ ((visibility ("hidden"))) xpcu_transfer(struct xpcu_s *xpcu, struct usb_transfer *ut);
struct xpcu_s __attribute__ ((visibility ("hidden"))) *xpcu_open(void);
int __attribute__ ((visibility ("hidden"))) xpcu_transfer(struct xpcu_s *xpcu, struct usb_transfer *ut);
struct xpcu_s __attribute__ ((visibility ("hidden"))) *xpcu_open(void);