Book Image

Embedded Linux Development Using Yocto Project Cookbook - Second Edition

By : Alex Gonzalez
Book Image

Embedded Linux Development Using Yocto Project Cookbook - Second Edition

By: Alex Gonzalez

Overview of this book

The Yocto Project has become the de facto distribution build framework for reliable and robust embedded systems with a reduced time to market.You'll get started by working on a build system where you set up Yocto, create a build directory, and learn how to debug it. Then, you'll explore everything about the BSP layer, from creating a custom layer to debugging device tree issues. In addition to this, you’ll learn how to add a new software layer, packages, data, scripts, and configuration files to your system. You will then cover topics based on application development, such as using the Software Development Kit and how to use the Yocto project in various development environments. Toward the end, you will learn how to debug, trace, and profile a running system. This second edition has been updated to include new content based on the latest Yocto release.
Table of Contents (13 chapters)
Title Page
Packt Upsell

Adding new packages

We have seen how to customize our image so that we can add supported packages to it. When we can't find an existing recipe, or we need to integrate some new software we have developed, we will need to create a new Yocto recipe.

Getting ready

There are some questions we need to ask ourselves before starting to write a new recipe:

  • Where is the source code stored?
  • Is it source-controlled or released as a tarball?
  • What is the source code license?
  • What build system is it using?
  • Does it need configuration?
  • Can we cross-compile it as it is, or does it need to be patched?
  • What files need to be deployed to the root filesystem, and where do they go?
  • Are there any system changes that need to happen, such as new users orinit scripts?
  • Are there any dependencies that need to be installed into sysroot beforehand?

Once we know the answers to these questions, we are ready to start writing our recipe.

How to do it...

It is best to start from a blank template such as the one that follows rather than...