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List:       kde-devel
Subject:    Re: kdelibs (L)GPL question - just to be sure
From:       Roberto Alsina <ralsina () conectiva ! com ! ar>
Date:       2001-01-02 12:01:39
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On Sun, 31 Dec 2000, mh wrote:

> Hi,
> sorry for this newbie licensing question, but I just want to be sure
> that I'm not violating a license here :-)
> 
> In my Qt2.2.x app (GPL) I make use of the KProcess class (LGPL).
> After reading several threads on qt-interest, I thought
> this isn't a problem at all, but now, after reading 
> "KDE 2 Development" I'm not longer sure that I don't break
> a license.
> 
> In order to use the KProcess class, I had to make some small modifications.
> The code is compiled with my app, and not as a seperate library.

[snip]

> Does this mean
> 1. what I'm currently doing (adding some modified files of a LGPL'd library 
> to a GPL'd app) is simply illegal.

No. When you take the files, you relicense them GPL. So, mixing GPL and
GPL, you are clear.
 
> 2. that the LGPL classes automatically turn in GPL code, and therfore there's
> no problem at all? If this is true, is it necessary to put an additional
> copyright notice in front of these modified classes ?

You need to change the license in the files to GPL. Or leave it as is,
everyone else does it (and it's not obviously illegal).

 ("\''/").__..-''"`-. .         Roberto Alsina
 `9_ 9  )   `-. (    ).`-._.`)  ralsina@conectiva.com.ar
 (_Y_.)' ._   ) `._`.  " -.-'   Director técnico
  _..`-'_..-_/ /-'_.'           Conectiva SA
(l)-'' ((i).' ((!.'             Buenos Aires - Argentina
                                KDE Developer (MFCH)
"Those who serve the revolution plough the sea" Bolivar


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