[ttybird]

One of the "open source" licenses that it is under is LGPL, you can do whatever you want with your code. (Although this does not mean that you should, please avoid publishing closed source software)

[jansommer]

It's not a bad suggestion, but it still doesn't satisfy the requirement. You can't put it all in a single executable if that is what you want

[ttybird]

You can, as long as you give the user the ability to replace the library. Such as by providing .o files.