[quagga-dev 12190] Re: [PATCH 2/2] HACKING: Quagga is a GPL project, all contributions must be compatible with GPL

Greg Troxel gdt at ir.bbn.com
Mon Apr 27 18:58:24 BST 2015

Dave Taht <dave.taht at gmail.com> writes:

> I don't really understand what this is intended to clarify.
> Are you asking contributors to specifically relicense their code as
> GPL as a criterion for inclusion? That does make for headaches with
> alternatively licensed code under lighter licenses with many
> contributors.
> Or are you merely requiring that the license of included code be
> compatible with the GPL (as the BSD, apache, and many other OSI
> approved licenses are.)

Quagga as a whole is GPL2, and thus the derived work which is quagga+foo
may be distributed only under the GPL.  So it's necessary for
contributors to grant permission to copy under the GPL (and to be able
to grant such permission).  This is not odd; pretty much every project
without an explicit CLA or assignment has an "inbound=outbound"
licensing policy.  It's obvious to me that quagga has always been like
this; it's just being explained better because there seems to be

Note that granting permission under GPL2 does not imply anything about
what people have to do with code that already existed outside of quagga.
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