Hello,
Cups seems to be a little bit heavy for my needs, I found more explanations in busybox sources (lpd.c in printutils):
- create /var/spool/ directory
- create symlink to /dev/lp0 and name it "lp"
- lauch lpd as background process and listen to port 515: tcpsvd -E 0 515 lpd /var/spool &
- just send file with lpr: lpr myFile
Emmanuel