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If the Open Source Edition is GNU GPL, aren there license conflicts with incompatible open source licenses? How come people can even run commercial software like the Opera web browser with it?

April 26, 2017conflicts edition GNU GPL incompatible license licenses open source people

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If the Open Source Edition is GNU GPL, aren there license conflicts with incompatible open source licenses? How come people can even run commercial software like the Opera web browser with it?

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If the Open Source Edition was licensed purely under the GNU GPL, there would be problems. However, as long as Qt-based software is either open source or was developed under a commercial license agreement with Trolltech, we grant permission to compile, link and run those programs with the Open Source Edition. This is written down in our second free software license, the QPL.