LGPL 2.1 + GPL 3 = problems?

Arnoud Engelfriet arnoud at engelfriet.net
Sun Jul 15 10:28:48 UTC 2007

Jesse Hannah wrote:
> But I could license the LGPL v2.1 parts under the LGPL v3:
>     This library is free software; you can redistribute it and/or
>     modify it under the terms of the GNU Lesser General Public
>     License as published by the Free Software Foundation; either
>     version 2.1 of the License, ***or (at your option) any later  
> version.***

If the library says that, then yes. But not all LGPL libraries carry
that particular message.

> The way I'm reading that, I'm free to redistribute the library under  
> the LGPL v3 if I want to, meaning (presumably) that I can use it with  
> a GPLv3 program. Does that sound right?

Yes, because the LGPLv3 allows conversion of the license to GPLv3.
With that conversion you can comply with GPLv3 for the entire work.


Arnoud Engelfriet, Dutch & European patent attorney - Speaking only for myself
Patents, copyright and IPR explained for techies: http://www.iusmentis.com/
              Arnoud blogt nu ook: http://blog.iusmentis.com/

More information about the License-discuss mailing list