Do Not Sign the Qt License Agreement Unchanged
Episode 55: Better Built By Burkhard
commercial license
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Using Qt 6 under LGPLv3
Most embedded Qt HMIs don't need the expensive commercial license but can be built with the free LGPL-3.0. Static linking is allowed with LGPL. B2B products need not allow the installation of modified Qt libs. Some Qt modules can be used under GPL albeit in separate processes.