LGPLv3 and GPLv2 incompatibility

Wilson, Andrew andrew.wilson at intel.com
Wed Aug 1 22:42:06 UTC 2007

David Woolley wrote:

> Wilson, Andrew wrote:
>> allowing a GPLv2/LPGLv3 combined work by allowing such a
>> combined work to be governed by GPLv2's copyleft under LGPLv3.
> Which would allow trivial downgrading any V3 licensed code by adding
> code with no real purpose other than to benefit from the proposed 
> special case.

This is quite correct.

Two points:

1) There is a great deal of GPLv2 code in the world.  As 'special cases'
   go, this one is extremely likely to occur in practice.

2) This discussion is in the context of /L/GPL.  Presumably, one
   chooses LGPL for one's code rather than GPL prime with the intent
   of enabling its broadest possible use.  See (1) for why preventing
   use with GPLv2 code seems inconsistent with the raison d'etre of
Andy Wilson
Intel open source technology center

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