Az, hogy mi kompatibilis a GPL-llel, abban RMS velemenyenek nagyon nagy sulya van. O azt mondja, hogy a CDDL _NEM_ PGL kompatibilis, a linkeles tehat tiltott GPL-CDDL viszonylatban.
tehat GNU libc+opensolaris kernel egyuttesen _illegalis_. hajra lehet probalkozni a BSD libc-vel.
Az fsf.org-rol idemasolva.
Common Development and Distribution License (CDDL)
This is a free software license which is not a strong copyleft; it has some complex restrictions that make it incompatible with the GNU GPL. That is, a module covered by the GPL and a module covered by the CDDL cannot legally be linked together. We urge you not to use the CDDL for this reason.