search for: libusb_unref_device

...rpath or -rpath-link) /mnt/ARM_FS/lib/libusb.so: undefined reference to `libusb_clear_halt' /mnt/ARM_FS/lib/libusb.so: undefined reference to `libusb_get_device_address' /mnt/ARM_FS/lib/libusb.so: undefined reference to `libusb_close' /mnt/ARM_FS/lib/libusb.so: undefined reference to `libusb_unref_device' [...] The libusb-1.0.so.0 file should be in the same directory as libusb.so, meaning that -rpath* options shouldn't be necessary. But if there is something special about the way libusb was installed (packaging, etc.) then you might need to fiddle with those options. > > An...