work around the GPL
Banned - Reputation: 147
Crossbones+ - Reputation: 6956
Posted 18 September 2012 - 11:33 PM
My game: Gnoblins
Developer journal about Gnoblins
Small goodies: Simple alpha transparency in deferred shader
Crossbones+ - Reputation: 6974
Posted 18 September 2012 - 11:58 PM
You don't have to order a copy to get the sorucecode.
It's open: http://code.google.com/p/sasl/
The commercial version just adds an additional module to encrypt the scripts, and that module is of course not GPL.
Moderators - Reputation: 28614
Posted 19 September 2012 - 12:02 AM
*X-plane is a commercial product
*SASL is a GPL project
*There is also a commercial version of SASL, created by the original authors of SASL.
The bold bit is the key. Normally, this commercial version of SASL would also have to be GPL licensed (which means you would be able to ask them for the source-code).
However, because the same company makes the GPL and the commercial version, this is known as dual-licensing -- they own the original copyright over the SASL code, and as long as they don't accept any public GPL-licensed contibutions, they continue to own the copyright over that code.
If they own the code, they can license it however they want. They can even release it under multiple licenses, which is what they've done. They've released a 99% complete version of their code, under the GPL license, and they've also released a 100% complete binary version under a commercial license.