[TYPO3] Extensions and GPL

Martin Kutschker Martin.Kutschker at n0spam-blackbox.net
Fri Sep 8 13:11:47 CEST 2006

Peter Russ schrieb:
> Dmitry Dulepov schrieb:
> [...]
>> Nope. Read GPL and GPL FAQ.
>> Quotes from http://www.gnu.org/licenses/gpl-faq.html:
>> ===============================================
>> Q: If a library is released under the GPL (not the LGPL), does that 
>> mean that any program which uses it has to be under the GPL?
>> A: Yes, because the program as it is actually run includes the library.
>> Q: If a program released under the GPL uses plug-ins, what are the 
>> requirements for the licenses of a plug-in.
>> A: ...If the program dynamically links plug-ins, and they make 
>> function calls to each other and share data structures, we believe 
>> they form a single program, which must be treated as an extension of 
>> both the main program and the plug-ins. This means the plug-ins must 
>> be released under the GPL or a GPL-compatible free software license, 
>> and that the terms of the GPL must be followed when those plug-ins are 
>> distributed.
>> ===============================================
>> There is no way to avoid GPL when writing plugins for TYPO3.
> Sorry, Dimitry: this is not correct. We've had this discussion already 
> several times at the different NGs. Pls check the archieves.

Yes, but the arguments for allowing a TYPO3 extension to be licenced in a 
non-GPL-compatible licence were not convincing ;-)


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