-int jtagkey_init(unsigned short vid, unsigned short pid);
-void jtagkey_close();
-int jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num);
+int __attribute__ ((visibility ("hidden"))) jtagkey_transfer(WD_TRANSFER *tr, int fd, unsigned int request, int ppbase, int ecpbase, int num);
+int __attribute__ ((visibility ("hidden"))) jtagkey_open(int num);
+void __attribute__ ((visibility ("hidden"))) jtagkey_close(int handle);