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Embedded Linux Development Using Yocto Project

Embedded Linux Development Using Yocto Project

By : Otavio Salvador, Angolini
5 (9)
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Embedded Linux Development Using Yocto Project

Embedded Linux Development Using Yocto Project

5 (9)
By: Otavio Salvador, Angolini

Overview of this book

The Yocto Project is the industry standard for developing dependable embedded Linux projects. It stands out from other frameworks by offering time-efficient development with enhanced reliability and robustness. With Embedded Linux Development Using Yocto Project, you’ll acquire an understanding of Yocto Project tools, helping you perform different Linux-based tasks. You’ll gain a deep understanding of Poky and BitBake, explore practical use cases for building a Linux subsystem project, employ Yocto Project tools available for embedded Linux, and uncover the secrets of SDK, recipe tool, and others. This new edition is aligned with the latest long-term support release of the aforementioned technologies and introduces two new chapters, covering optimal emulation in QEMU for faster product development and best practices. By the end of this book, you’ll be well-equipped to generate and run an image for real hardware boards. You’ll gain hands-on experience in building efficient Linux systems using the Yocto Project.
Table of Contents (20 chapters)
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Using packages to generate a rootfs image

One of the most common uses of Poky is the rootfs image generation. The rootfs image should be seen as a ready-to-use root filesystem for a target. The image can be composed of one or more filesystems. It may include other artifacts available during its generation, such as the Linux kernel, the device tree, and bootloader binaries. The process of generating the image is composed of several steps. Its most common uses are as follows:

  1. Generating the rootfs directory
  2. Creating the required files
  3. Wrapping the final filesystem according to the specific requirements (it may be a disk file with several partitions and contents)
  4. Finally, compressing it, if applicable

The sub-tasks of do_rootfs perform all these steps. rootfs is a directory with the desired packages installed, with the required tweaks applied afterward. The tweaks make minor adjustments to the rootfs contents – for example, when building a development...

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