Package libusb (0.1.10a-r1) is installed on root and has the following files:
/usr/lib/libusbpp-0.1.so.4
/usr/lib/libusb-0.1.so.4
/usr/lib/libusb-0.1.so.4.4.2
/usr/bin/libusb-config
/usr/lib/libusbpp-0.1.so.4.4.2