1. AGENDA
Basics of Yocto
Sample Recipe
​Patches

2. Yocto
Yocto Project help developers to create custom Linux image for target boards.
Layered Architecture.
Recipe : set of instructions
Bitbake : It is the build engine in the Yocto Project.it executes the task according
to provided recipes.
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3. Yocto - Architecture

4. Content of The Recipe
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title
 DESCRIPTION
 SECTION
 LICENSE
 LIC_FILES_CHKSUM
 SRC_URI
 S
 do_compile
 do_install
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5. What is Patches ?
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• Patch management is the process of distributing and
applying updates to software. These patches are often
necessary to correct errors
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6. Patch using quilt
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Make Make clean build.
Exit Exit from current window [exit]
Create Create patch [quilt refresh]
Edit Edit the file [ quilt edit filename.c]
Add Add the file which need to be edited [ quilt add filename.c]
Check Check if our patch is on top .[quilt top]
Run Run the command inside build directory [bitbake recipe-name -c devshell]
Add Add the path to Patch in SRC_URI [file://temp.patch]
Create Create Patch file in files directory.[touch files/temp.patch]

7. Patch using git
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 Git add & Commit the current code [git commit -m "message“]
 Edit the code
 Git add & Commit the current code [git commit -m "message“]
 git format-patch -1 <commitid>
 Copy the patch file to the "/files/*“ directory
 Add the path to patch in recipe.
 Clean and Build
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8. Q&A