Who has to buy a license when selling games made with an open source builder using Qt?

Question

Qt

Hello, I want to make an open source game engine builder using Qt and SDL. Since its code will be open source, no license is required, but what happens if a game on this engine is sold (for example, on Steam)? Accordingly, the code will be closed. Does anyone who plans to sell their game on this engine have to buy a Qt license?

Answer 1

Qt\SDL is licensed under the LGPL.
It imposes a restriction:
*You do not have the right to close their modification.
*If you are statically linking a library to a project, then you must distribute it so that you can rebuild it with a different version.
Purchasing a commercial license is not a requirement for closed source use.