Portable exe by QT
-
i think so you must buy commercial version of Qt to do this.
-
It depends on what license you want to use for your exes.
For open source projects you have to deliver your source code and may statically link to Qt.But checkout the license options.You would need to create static Qt libs for linking by your own. There are no precompiled static libs prepared here nor should be somewhere else, I believe.
I am not sure if you will have static libs automatically with a commercial license.
-
This question has already been answered. For further information check out https://qt-project.org/products/licensing
Since Qt is a cross platform framework, yes you can create executables for the given platforms.