In this chapter, we learned the metadata concept, how recipes depend on each other, and how Poky deals with dependencies. We also got a better view of the behind-the-scenes tasks done by BitBake to download all the required source code, to store it in the build directory used to build and generate packages, as well as and how these packages fit into generated images.

In the next chapter, we will see the contents of the build directory after complete image generation and how BitBake uses it in the baking process, including the contents of the temporary build directory and its generated files.