linux-kernel - Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3

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Date:	Thu, 14 Jun 2007 23:25:57 -0300
From:	Alexandre Oliva <aoliva@...hat.com>
To:	Florin Malita <fmalita@...il.com>
Cc:	Daniel Hazelton <dhazelton@...er.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Adrian Bunk <bunk@...sta.de>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, Greg KH <greg@...ah.com>,
	debian developer <debiandev@...il.com>, david@...g.hm,
	Tarkan Erimer <tarkan@...one.net.tr>,
	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>, mingo@...e.hu
Subject: Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3

On Jun 14, 2007, Bill Nottingham <notting@...hat.com> wrote:

> Alexandre Oliva (aoliva@...hat.com) said: 
>> And since the specific implementation involves creating a derived work
>> of the GPLed kernel (the signature, or the signed image, or what have
>> you)

> Wait, a signed filesystem image that happens to contain GPL code
> is now a derived work? Under what sort of interpretation does *that*
> occur?

Is the signature not derived from the bits in the GPLed component, as
much as it is derived from the key?

Isn't the signature is a functional portion of the image, i.e., if I
take it out from the system, it won't work any more?

> (This pretty much throws the 'aggregation' premise in GPLv2 completely
> out.)

Not really.  It could take some explicit distinguishing between
functional and non-functional signatures, but that's about it.

GPLv3 chose a different path to make this clarification.

-- 
Alexandre Oliva         http://www.lsd.ic.unicamp.br/~oliva/
FSF Latin America Board Member         http://www.fsfla.org/
Red Hat Compiler Engineer   aoliva@...dhat.com, gcc.gnu.org}
Free Software Evangelist  oliva@...d.ic.unicamp.br, gnu.org}
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