testtool won't build with
make USB=kernel
unless you modify the Makefile (obviously kernel USB
support is required).
Sane backends won't build at all without libusb, even
when kernel USB support is enabled (and testtool has
successfully scanned using kernel support only).
cheers
j
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user_id=22590
sane backends not building without libusb is not a bug - [lib]sane itself
depends on libusb (and, of course, libusb-dev) for other various
backends. (all of this on debian)