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Date:      Mon, 18 Mar 2002 16:42:18 -0800
From:      Terry Lambert <tlambert2@mindspring.com>
To:        Greg 'groggy' Lehey <grog@FreeBSD.org>
Cc:        hiten@uk.FreeBSD.org, Chris Mason <mason@suse.com>, Josh MacDonald <jmacd@CS.Berkeley.EDU>, Parity Error <bootup@mail.ru>, freebsd-fs@FreeBSD.org, reiserfs-dev@namesys.com
Subject:   Re: GPL license issues (was: [reiserfs-dev]i Re: metadata update  durability ordering/soft updates)
Message-ID:  <3C96896A.F9F0A36A@mindspring.com>
References:  <20020318174641.A1153@hpdi.ath.cx> <3C9676B4.49A76589@mindspring.com> <20020319095746.D93909@wantadilla.lemis.com>

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Greg 'groggy' Lehey wrote:
> > It can not be distributed compiled into a kernel distributed on
> > CDROM, legally, because of the license conflict, but it can be used
> > in an after-market fashion by an end user.
> 
> No.  This is wrong.  If someone were to do this, they would have to
> distribute the kernel binary under GPL.  No other changes would apply.

http://www.gnu.org/licenses/gpl.txt

    2.b) You must cause any work that you distribute or publish, that in
    whole or in part contains or is derived from the Program or any
    part thereof, to be licensed as a whole at no charge to all third
    parties under the terms of this License.

Section 3 requires that you place the source code itself under
the GPL.  That's not possible.

Section 4 voids your rights to the GPL'ed code, if you do not
comply with section 3.

See also "GPL-Incompatible, Free Software Licenses":

http://www.gnu.org/licenses/license-list.html#GPLIncompatibleLicenses

Specifically, the 4 clause UCB license is listed as
"incompatible".

-- Terry

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