I've been needing to set up printing, so I went ahead and compiled libusb
1.0.9 and cups 1.5.3.
libusb needs the  TIMESPEC_TO_TIMEVAL macro; for the time being, I added
the definition to libusb (diff attached for Gregor's sake).
It probably should go in sys/time.h with gnu | bsd visibility instead.
Other than that, libusb compiles.

CUPS builds for the most part; in ppdc, genstrings segfaults (haven't
built gdb, can't say what the issue is). make || make would finish,
though...
It _partly_ passes make -i test; I attached the logs it generated. CUPS
wants -D_BSD_SOURCE (some implicit definitions).