-bool cmd_receive(UsbCommand* cmd);\r
-bool cmd_send(uint32_t cmd, uint32_t arg0, uint32_t arg1, uint32_t arg2, void* data, size_t len);\r
-\r
-#endif // _PROXMARK_CMD_H_\r
+extern bool cmd_receive(UsbCommand* cmd);\r
+extern bool cmd_send(uint32_t cmd, uint32_t arg0, uint32_t arg1, uint32_t arg2, void* data, size_t len);\r