Re: [sigc] Linking dynamically with SigC++ (now rather: License)

[Michael Ekstrand <mekstran scl ameslab gov>]

On Sat, Jul 14, 2007 at 04:31:22AM +0200, Murray Cumming wrote:
> Once again, sorry for the delay in making the LGPL exception text
> official.
> 
> However, I'm now wondering if maybe a change from LGPLv2 to LGPLv3 would
> be simpler. libsigc++ is licensed under "either version 2 of the
> License, or (at your option) any later version" so changing it to
> "version 3 or later" would be a lot less work.
> 
> I think LGPL3 seems to allow more than 10 lines of template code in
> headers, as long as you say that you are using the library, but I'm not
> completely sure:
> http://www.gnu.org/licenses/lgpl-3.0.html 

One thing that I think merits consideration before making this change:
GPL2 compatibility.  It seems that moving to LGPLv3 means that GPL2-only
programs can no longer use the latest libsigc++[1].  I'm not sure if there
are any, or how much of a concern this would be in practice, but it
should probably not be ignored.

- Michael

 1. http://www.fsf.org/licensing/licenses/gpl-faq.html#AllCompatibility