Erm, at the risk of getting flamed, where does IAX come into this picture? If I re-implement IAX(2) in a different language (not using iaxcomm except as a refererence or test ) and want to sell a product based on it can I do that, or do I need a license ?
You are probably ok without a comercial license. It depends on how heavily
you borrow directly from the gpl:ed source. The usual (unclear to me)
rules for what constitutes a "derived work" applies.
If you start from the specification there should be no problem whatsoever.
When in doubt contact the original author and/or your legal councel.
You can modify and/or link to GPLed code with commercial code and get away with it as long as you don't distribute the stuff. That's the story with G.729, with nVidia drivers etc etc etc
roy
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