How can you statically compile applications in Qt?

In Qt, it is possible to use static compilation to build applications. This method compiles all dependencies, including Qt libraries, into the final executable file, making the deployment process of the application simpler.

Here are the steps to statically compile an application in Qt:

1. Open Qt Creator and open your project.
2. To enable static compilation, add the following code line in the project file (.pro file).
3. Enable static configuration.
4. Save and close the project file.
5. In the “Build” menu of Qt Creator, choose “Rebuild Project” or press Ctrl + B to rebuild the project. This will compile the application using the static compile option.
6. Once built, you can locate the generated executable file in the project’s output directory. It will be a standalone file, no longer dependent on Qt library files.

It should be noted that static compilation may increase the size of the application and the build time may be longer than dynamic compilation. Additionally, some plugins and features may not be able to be used in static compilation. Therefore, when choosing static compilation, make sure your application does not rely on these plugins and features.