PROCESS_ADAPTERS([USB1_ADAPTERS], [$use_libusb1 = yes], [libusb-1.x])
PROCESS_ADAPTERS([USB_ADAPTERS], [$use_libusb1 = yes -o $use_libusb0 = yes], [libusb-1.x or libusb-0.1])
PROCESS_ADAPTERS([USB0_ADAPTERS], [$use_libusb0 = yes], [libusb-0.1])
PROCESS_ADAPTERS([USB1_ADAPTERS], [$use_libusb1 = yes], [libusb-1.x])
PROCESS_ADAPTERS([USB_ADAPTERS], [$use_libusb1 = yes -o $use_libusb0 = yes], [libusb-1.x or libusb-0.1])
PROCESS_ADAPTERS([USB0_ADAPTERS], [$use_libusb0 = yes], [libusb-0.1])