Using Qt under LGPL-3.0

You have probably heard some of the following statements, if you intend to use Qt under LGPL-3.0:

  • “You must make the source code of your proprietary application public.
  • “You cannot link the Qt libraries statically.”
  • “You must allow users to install a modified version of the Qt libraries on your X-ray machine.”
  • “You cannot switch from Qt Commercial to Qt LGPL or vice versa.”
  • “Qt Commercial gives you complete peace of mind when it comes to licensing.”

These statements have one thing in common: They are all wrong. In my talk, I’ll explain why and how you can safely use Qt under LGPL-3.0 on embedded devices – as thousands of companies do.