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Mastering Embedded Linux Programming

Mastering Embedded Linux Programming

By : Chris Simmonds
4.8 (20)
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Mastering Embedded Linux Programming

Mastering Embedded Linux Programming

4.8 (20)
By: Chris Simmonds

Overview of this book

Mastering Embedded Linux Programming takes you through the product cycle and gives you an in-depth description of the components and options that are available at each stage. You will begin by learning about toolchains, bootloaders, the Linux kernel, and how to configure a root filesystem to create a basic working device. You will then learn how to use the two most commonly used build systems, Buildroot and Yocto, to speed up and simplify the development process. Building on this solid base, the next section considers how to make best use of raw NAND/NOR flash memory and managed flash eMMC chips, including mechanisms for increasing the lifetime of the devices and to perform reliable in-field updates. Next, you need to consider what techniques are best suited to writing applications for your device. We will then see how functions are split between processes and the usage of POSIX threads, which have a big impact on the responsiveness and performance of the final device The closing sections look at the techniques available to developers for profiling and tracing applications and kernel code using perf and ftrace.
Table of Contents (16 chapters)
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15
Index

Chapter 6. Selecting a Build System

The preceding chapters covered the four elements of embedded Linux and showed you, step-by-step, how to build a toolchain, a bootloader, a kernel, and a root filesystem, and then combine them into a basic embedded Linux system. And there are a lot of steps! Now it is time to look at ways to simplify the process by automating it as much as possible. I will look at how embedded build systems can help, and look at two in particular: Buildroot and the Yocto Project. Both are complex and flexible tools which would require an entire book to adequately describe how they work. In this chapter, I only want to show you the general ideas behind build systems. I will show you how to build a simple device image to get an overall feel of the system and then how to make some useful changes, using the Nova board example from the previous chapters.

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