Mike Linksvayer

Mike Linksvayer at

Glad that FSF's post on BY-SA-4.0->GPLv3 compatibility encourages specifying a proxy that can allow other GPL versions, since the compatibility doesn't explicitly permit GPLv3+ (I advocated for it to, but anyway).

Can anyone point to an existing GPLv3 project that specifies a proxy? I can't find even an example anywhere, not even in the copyleft.org guide (it does mention the proxy clause). Someone point me in the right direction or I will fabricate terrible example with a patch for inclusion in the guide to eventually get @bkuhn's attention on the matter. I will probably do that anyway if nobody beats me to it, but the patch could be less awful with your input!

BTW the FSF post also has a comprehensive (AFAIK) list of people associated at some point with CC and/or FSF who helped on the compatibility project. There was also at least one non-connected person who I think was really helpful with kind and patient but extremely persistent input, Arne Babenhauserheide.

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I am glad that the FSF post explicitly mentioned the source requirements of GPLv3 when ones are considering adapting CC BY-SA 4.0 materials into GPLv3 works. I fully support this precaution, but this also makes clear the burden when one is to make use of others' CC BY-SA 4.0 blobs for GPLv3 works. How to get and verify s/he has the right source materials from which the blobs can be faithfully regenerated? What happens when the source materials are not explicitly BY-SA 4.0 licensed?

Other the other hand, now that it is officially one-way compatible, perhaps there will be a new norm for people to always release CC BY-SA works with the source materials. :-)

Tyng-Ruey Chuang at 2015-10-10T05:50:03Z

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Could such a proxy declaration look like this?

later versions of the GPL are allowed by proxy, if they are deemed compatible by Creativecommons. See http://creativecommons.org/compatiblelicenses

Arne Babenhauserheide at 2015-10-10T09:19:55Z

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(a bit late but still) Thank you for the mention! ☺

I wrote about the compatibility on two pages:


“This is the biggest news for free culture and free software in the past 5 years: The creativecommons attribution sharealike license is now one-way compatible to the GPL”

Arne Babenhauserheide at 2015-11-14T11:50:47Z

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