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Embedded Linux Development with Yocto Project

You're reading from   Embedded Linux Development with Yocto Project Develop fascinating Linux-based projects using the groundbreaking Yocto Project tools

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Product type Paperback
Published in Jul 2014
Publisher
ISBN-13 9781783282333
Length 142 pages
Edition 1st Edition
Tools
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Toc

Table of Contents (17) Chapters Close

Preface 1. Meeting the Yocto Project FREE CHAPTER 2. Baking Our Poky-based System 3. Using Hob 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 A. References
Index

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 filesystem. The file is copied from ${WORKDIR} to ${D} as the directory 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).

Tip

We should use the variables provided on top of poky/meta/conf/bitbake.conf instead of pointing to hardcoded paths. For...

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