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Embedded Linux Development using Yocto Projects

You're reading from   Embedded Linux Development using Yocto Projects Learn to leverage the power of Yocto Project to build efficient Linux-based products

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Product type Paperback
Published in Nov 2017
Publisher
ISBN-13 9781788470469
Length 162 pages
Edition 2nd Edition
Tools
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Authors (2):
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Otavio Salvador Otavio Salvador
Author Profile Icon Otavio Salvador
Otavio Salvador
Daiane Angolini Daiane Angolini
Author Profile Icon Daiane Angolini
Daiane Angolini
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Toc

Table of Contents (15) Chapters Close

Preface 1. Meeting the Yocto Project FREE CHAPTER 2. Baking Our Poky-Based System 3. Using Toaster to Bake an Image 4. Grasping the BitBake Tool 5. Detailing the Temporary Build Directory 6. Assimilating Packaging Support 7. Diving into BitBake Metadata 8. Developing with the Yocto Project 9. Debugging with the Yocto Project 10. Exploring External Layers 11. Creating Custom Layers 12. Customizing Existing Recipes 13. Achieving GPL Compliance 14. Booting Our Custom Embedded Linux

Adding extra files to the existing packages

If we need to include an extra configuration file, we should use FILESEXTRAPATHS, as explained in the previous example and shown in the following lines of code:

FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}-${PV}:"
SRC_URI += "file://newconfigfile.conf"
do_install_append() {
install -m 644 ${WORKDIR}/newconfig.conf ${D}${sysconfdir}
}

The do_install_append function appends the provided block below the metadata already available in the original do_install function. It includes the command needed to copy our new configuration file into the package's filesystem. The file is copied from ${WORKDIR} to ${D} as these are the directories used by Poky to build the package and the destination directory used by Poky to create the package. The ${sysconfdir} directory is the system configuration directory (usually with /etc...

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