advice regarding doom-engine licences
I am emailing the list to ask your advice regarding a collection of licences
which the doom engine and related engines have been licenced under. This is in
relation to bug #264816 , `doomlegacy-sdl: combines incompatible, non-dfsg
The doom computer game consists of two main files - the executable and a data
file known as the IWAD. ID Software release the source of the engine under the
non-profit licence described in DOOMLIC.TXT. They later released it under
the GPL licence. The IWAD is only available commercially and for that
reason all doom ports currently go in contrib.
Raven Software / Activision later released the heretic and hexen source code
under a new licence.
I am mailing to ask your opinions of the following points:
1) The original ID licence and the heretic/hexen licence are both incompatible
with the GPL and thus attempts to mix them result in a combination which
cannot be included in debian nor non-free. Both licences are additionally
not DFSG free.
2) The original ID licence and the heretic/hexen licence are compatible with
3) the heretic/hexen licence is suitable for inclusion in non-free.
The doom licence has been discussed on -legal before and the concencus
seems to have been that the original doom licence is not suitable for
inclusion in non-free. This leads me to believe that point 3 above is
Thank you for your help.
 Please find the mentioned files attached to the bug report #264816
 possibly as a result of a very popular derivation of the
source going missing due to a single hard disk crash.
 Note: there is a project (which I am involved in) to create a free IWAD
and so it is not long before we can put doom engines in main:
http://freedoom.sf.net/ which has been ITPd: http://bugs.debian.org/206139