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Can I use GPL in proprietary software?
Software under the GPL may be run for all purposes, including commercial purposes and even as a tool for creating proprietary software, such as when using GPL-licensed compilers. Users or companies who distribute GPL-licensed works (e.g. software), may charge a fee for copies or give them free of charge.
How do I get my GPL code?
How to use GNU licenses for your own software
- Get a copyright disclaimer from your employer or school.
- Give each file the proper copyright notices.
- Add a COPYING file with a copy of the GNU GPL or GNU AGPL.
- Also add a COPYING.
- Put a license notice in each file.
- (Optionally) make the program display a startup notice.
Can I distribute my plugin without violating the GPL?
Your whole plugin is covered by the GPL, since it links to a GPL library. Therefore, when you distribute your compiled binary, it must be accompanied by the source code per the requirements of the GPL. You cannot provide source code for the proprietary library, so you cannot distribute the plugin without violating the GPL.
Does GPL-licensed software require a proprietary library?
A GPL-licensed software may of course require a proprietary library. But as no-one is allowed to distribute the resulting executable, it makes such programme in all situations pointless where the ready-to-use software leaves your computer(s).
Can I distribute a modified version of a project under the GPL?
No. The GPL says that your modified versions must carry all the freedoms stated in the GPL. Thus, anyone who receives a copy of your version from you has the right to redistribute copies (modified or not) of that version. You may not distribute any version of the work on a more restrictive basis.
Does the GPL apply to private use?
Yes, the GPL does not affect private use. This is both due to private use exception in copyright law, and because the GPL explicitly says that it only applies to distributions of “something” containing GPL code. Can I distribute the plugin as a compiled executable?