From kde-core-devel  Sat Mar 04 11:12:30 2006
From: Thiago Macieira <thiago () kde ! org>
Date: Sat, 04 Mar 2006 11:12:30 +0000
To: kde-core-devel
Subject: Re: Common Public License (CPL)
Message-Id: <200603041212.31133.thiago () kde ! org>
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George Kraft wrote:
>> I am not a license expert but looking at
>> http://www.gnu.org/licenses/license-list.html
>> I see problems, as the CPL license is described as not being
>> compatible with GPL (assuming that we are talking about the same CPL
>> license).
>
>With respect to relative incompatibility, LGPL is incompatible to GPL,
>because GPL libraries force applications to become GPL.  LGPL and CPL
>libraries do not force application licensing.

LGPL isn't incompatible to GPL. However, GPL is incompatible with LGPL.

Don't invert the order because it's significant.

However, all KDE library code must be LGPL-compliant *and* GPL-compatible.=
=20
The reason for that is that the KDE libraries are licensed under the=20
union of all the licenses' restrictions: the union must be LGPL. And they=20
must be GPL-compatible, since the KDE application code is GPL.

I haven't read the terms of the CPL and I'm not a lawyer, so I'm not=20
commenting on whether we're allowed to link to CPL-licensed code or not.

>I'm not asking to mix code with different licenses.  :-)  I'm trying to
>get folks to realize that CPL is another license for header files and
>libraries that be used to build GPL code.

As long as CPL is LGPL and GPL-compliant, it's ok. [I'm not saying it is=20
or it isn't]

=2D-=20
  Thiago Macieira  -  thiago (AT) macieira.info - thiago (AT) kde.org
    PGP/GPG: 0x6EF45358; fingerprint:
    E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358

4. And =E6fter se scieppend ingelogode, he wr=E1t "cenn", ac eala! se=20
rihtendgesamnung andswarode "cenn: ne w=E1t h=FA cennan 'eall'. =C1stynt."

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