-GSList *list_serial_ports(void);
-int serial_open(const char *pathname, int flags);
-int serial_close(int fd);
-int serial_flush(int fd);
-int serial_write(int fd, const void *buf, size_t count);
-int serial_read(int fd, void *buf, size_t count);
-void *serial_backup_params(int fd);
-void serial_restore_params(int fd, void *backup);
-int serial_set_params(int fd, int speed, int bits, int parity, int stopbits,
- int flowcontrol);
+SR_PRIV GSList *list_serial_ports(void);
+SR_PRIV int serial_open(const char *pathname, int flags);
+SR_PRIV int serial_close(int fd);
+SR_PRIV int serial_flush(int fd);
+SR_PRIV int serial_write(int fd, const void *buf, size_t count);
+SR_PRIV int serial_read(int fd, void *buf, size_t count);
+SR_PRIV void *serial_backup_params(int fd);
+SR_PRIV void serial_restore_params(int fd, void *backup);
+SR_PRIV int serial_set_params(int fd, int speed, int bits, int parity,
+ int stopbits, int flowcontrol);