LGPL 2.1 + GPL 3 = problems?

Matthew Flaschen matthew.flaschen at gatech.edu
Mon Jul 16 04:25:19 UTC 2007

Philippe Verdy wrote:
> What the LGPL says is that your modified library as a whole, licenced under
> LGPL v3 can be also licenced under GPLv3 only (excluding any later version
> of the GPL)

It does include later versions.  As noted earlier, it says, "(If a newer 
version than version 2 of the ordinary GNU General Public License has 
appeared, then you can specify that version instead if you wish.)"

, and in that case, the promotion of LGPL to GPL makes an
> explicit "additional restriction" to the default terms of the GPLv3 which
> normally allows by default "version 3.0 of the GPL or any later version".

The terms of GPLv3 do not allow using version 3.0 or later.  The license 
notice usually (but not always) allows that.

Matthew Flaschen

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