By Gene Sally
This present day, Linux is incorporated with approximately each embedded platform. Embedded builders can take a extra smooth direction and spend extra time tuning Linux and benefiting from open resource code to construct extra powerful, feature-rich purposes. whereas Gene Sally doesn't overlook porting Linux to new undefined, glossy embedded is extra refined than ever: so much structures comprise the features stumbled on on machine platforms. This booklet is written from the point of view of a person utilising applied sciences and methods quite often reserved for machine structures. glossy consultant for constructing embedded Linux structures exhibits you the way to paintings with current Linux embedded method, whereas nonetheless educating easy methods to port Linux Explains top practices from anyone who has performed it sooner than What you’ll research The anatomy of an embedded Linux venture tips to create an embedded Linux improvement surroundings tips on how to configure and construct an embedded Linux kernel the right way to configure and construct open resource initiatives for embedded structures tips on how to reduce assets and boot instances What assets are available open resource that will help you construct your venture Who this publication is for This e-book is for pro embedded builders who've an realizing of uncomplicated software program improvement recommendations. You don’t must be acquainted with Linux, yet try to be cozy operating from the command-line. desk of Contents approximately Embedded Linux Configuring the software program surroundings aim Emulation and digital Machines beginning Your undertaking Getting Linux in your Board making a Linux Distribution from Scratch Booting the Board Configuring the appliance improvement setting program improvement Debugging functions Kernel Configuration and improvement actual Time utilizing Open resource software program tasks BusyBox method layout approach Tuning Deploying functions dealing with box Updates
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Additional resources for Pro Linux Embedded Systems (Expert's Voice in Linux)
Example text
Your Application After the boot loader loads the kernel and the kernel mounts the root file system, it’s time for something to start running that you and your boss view as useful. When Linux starts, it looks for a program to execute by default, or you can supply it with the name of something to run. This program runs as the first process and must continue to run. When this process stops, the kernel, and thus the entire system, stops running. On your desktop Linux system, this program is likely init.
Root file system: Everything under the / directory, containing the programs run by the kernel. Every Linux system has a root file system. Embedded systems have a great amount of flexibility in this respect: the root file system can reside in flash, can be bundled with the kernel, or can reside on another computer on the network. • Application: The program that runs on the board. The application can be a single file or a collection of hundreds of executables. All these components are interrelated and thus depend on each other to create a running system.
These are separate, albeit related, projects in Linux. This separation is vexing for engineers used to tools from a certain company in Redmond, Washington, where the tools are monolithic in nature. But not to worry; when you’re working on an embedded project, this separation is an advantage, because the additional choice lets you select the right tool for your application. The GCC compiler installed on your host machine is preconfigured to use the GNU C Standard Library, frequently called glibc.