Licencing: release the same software with double licence

Posted by Luca on Stack Overflow See other posts from Stack Overflow or by Luca
Published on 2010-04-01T17:34:22Z Indexed on 2010/04/02 17:43 UTC
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licence

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gpl

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proprietary-software

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licensing

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dual-licensing

In my free time, I develop (alone, sigh) a project, in particoular an application library. I've released it using GPL v3.

At this time, this project has come very useful for a job. I'd like to release my OSS library toghether with the application using the same GPL v3 licence, with the exception that it can be linked for the specific application, or for the specific application vendor.

AFAIK, the copyright owner can handle the entire source and licencing it, I did it; and probably the licence owner could cut&paste its own code, change its licence and use for other projects, isn't? But an GPL'ed library cannot be linked with a proprietary software, right? But software could be double-licenced, as MySQL does.

So the question is: what should I do to allow the distribution of my GPL'ed library with a proprietary software, being the copyright owner?

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