Learn how to use a Shadow Build directory Qmake. Our Server Management Support team is here to help you with your questions and concerns.

How to use a Shadow Build directory with Qmake

In Qt, we can use a shadow build directory with Qmake to separate the build output files from the source files in a distinct directory. In fact, this is also known as an “out-of-source” or “out-of-tree” build.

According to our experts, when we work on a software project via the Qt framework, we have source files and build output files related to the project.

Usually, projects are built by creating the build files and executables in the same directory as the source files. However, with a shadow build directory, we can keep the build output separate from the source files. This offers several benefits.

Benefits of using a shadow build directory

• When the build files are in a separate directory, it keeps the source directory clean and organized.
• It is easier to clean up the build output without affecting the source files. If we need to start fresh, you can delete the entire shadow build directory and create a new one.
• With shadow build directories, we can create multiple build configurations for the same source files. This allows us to build the project with different build settings.
• Keeping build artifacts separate is useful for version control systems like Git.

How to use a Shadow Build directory with Qmake

1. First, we have to create a new directory outside of the source directory. This will be the shadow build directory.
2. Then, we have to head to the shadow build directory and open a terminal to run qmake with the path to our project’s .pro file as seen below:

   qmake /path/to/source/project.pro
3. Now, Qmake will generate the build files in the shadow build directory.

After that, we have to use a build tool like make or nmake to build our project.

After the build is successful, we can find the binary executable in the shadow build directory and run it from there.

At the end of the day, the shadow build directory, maintains a clear separation between our project’s source files and the build output.

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Conclusion

In summary, our Support Techs demonstrated how to use a Shadow Build directory with Qmake.