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By Karim Yaghmour; et al

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Extra info for Building embedded Linux systems : Previous ed.: published as by Karim Yaghmour. 2003. - Includes index

Sample text

Failing that, there’s always Google. Community support Community support is perhaps one of the biggest strengths of Linux. This is where the spirit of the free software and open source community can be felt most. As with application needs, it is likely that someone has encountered the same problems as you in similar circumstances. Often, this person will gladly share his solution with you, provided you ask. The development and support mailing lists are the best place to find this community support, and the level of expertise found there often surpasses what can be found through expensive support phone calls with proprietary OS vendors.

Modules are software components that can be dynamically loaded and unloaded to add functionality to the kernel. While they are mainly used for device drivers, they can and have been used for other purposes (for example, for new filesystems, crypto library support for cryptographic storage, and a whole multitude of other purposes). Many components of the kernel can actually be built as loadable modules to reduce the kernel image’s size. When needed, the various modules can be loaded during runtime (as discussed in Chapter 5).

This may result in “featurism,” whereby your system will have lots and lots of features but won’t necessarily fulfill its primary purpose. Therefore, before you go looking at all the latest Linux gizmos, sit down and write a list of what you need. ” This doesn’t mean that you shouldn’t change your list if you see something pertinent; it is just a warning about the quantity of software available for Linux and the inherent abundance of choices. Chapter 3 discusses the hardware components that can be found as part of an embedded Linux system.

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