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Mastering Embedded Linux Development

Mastering Embedded Linux Development

By : Frank Vasquez, Mr. Chris Simmonds
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Mastering Embedded Linux Development

Mastering Embedded Linux Development

By: Frank Vasquez, Mr. Chris Simmonds

Overview of this book

Mastering Embedded Linux Development' is designed to be both a learning resource and a reference for your embedded Linux projects. The book starts by breaking down the fundamental elements that underpin all embedded Linux projects: the toolchain, the bootloader, the kernel, and the root filesystem. First, you will download and install a pre-built toolchain. After that, you will cross-compile each of the remaining three elements from scratch and learn to automate the process using Buildroot and the Yocto Project. The book progresses with coverage of over-the-air software updates and rapid prototyping with add-on boards. Two new chapters tackle modern development practices including Python packaging and deploying containerized applications. These are followed by a chapter on writing multithreaded code and another on techniques to manage memory in an efficient way. The final chapters demonstrate how to debug your code, whether it resides in user space or in the Linux kernel itself. In addition to GDB, the book also covers the different tracers and profilers that are available for Linux so that you can quickly pinpoint any performance bottlenecks in your system. By the end of this book, you will be able to create efficient and secure embedded devices with Linux that will delight your users.
Table of Contents (28 chapters)
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1
Part 1: Elements of Embedded Linux
7
Part 2: Building Embedded Linux Images
11
Part 3: System Architecture and Design Decisions
18
Part 4: Developing Applications
23
Part 5: Debugging and Optimizing Performance

Building your own distro

At the start of the previous chapter, I told you about distro layers such as meta-poky and the distribution metadata contained in their conf/distro subdirectories. As we have seen, you don’t need your own distro layer to build your own custom images. You can go a long way without ever having to modify any of Poky’s distribution metadata. But if you want to alter distro policies (e.g., features, C library implementations, choice of package manager, and so on), then you can choose to build your own distro.

Building your own distro is a three-step process:

  1. Create a new distro layer.
  2. Create a distro configuration file.
  3. Add more recipes to your distro.

But before we get into the technical details of how to do that, let’s consider when it’s the right time to roll your own distro.

When and when not to

Distro settings define the package format (rpm, deb, or ipk), package feed, init system (systemd...

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