If Turtle Arena contains both GPLv2+ modules (from ioquake3) and GPLv3 modules
(from WolfET)
I'm late to this discussion, but I wanted to throw in an important note:
Enemy Territory, as far as I can tell, isn't compatible with the GPL3.
http://icculus.org/~icculus/dotplan/ET-COPYING.txt
You can't say "this is GPL3 licensed, oh, but delete this section and
use this text instead." I mean, you _can_, but then you can't
intermingle it with other GPL code. Basically, it's not the GPL3 license
anymore once you make modifications to it...and all versions of the GPL
explicit require that you not add new restrictions to the license.
This is almost certainly fallout from id Software's sale to Zenimax.
Apparently the new set of lawyers don't "get it" like the old ones did.
You can still use, modify, and distribute ET source code, and
by-and-large, use it like GPL3 source code. But it's not the GPL3.
ioquake3 should not commit any patches based on ET source code. I'm
sorry, that sucks, but that's how they (probably unintentionally) set it
up in the ET source release.
tl;dr: you can't intermingle the open source releases of ET and Quake3
at all.
I am not a lawyer, this is not legal advice,
--ryan.
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