FAQ:What do I need to do when I change my recipe to ensure that the changes make it to the image
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Q: What do I need to do when I change my recipe to ensure that the changes make it in to the image?
A: Update the PR variable in your recipe.
Explanation: Every recipe has a variable PR that holds the current release version of this recipe. If you do modifications on the recipe you need to increase the PR variable as well. Example:
Before modification of your recipe:
PR = "r2"
After modification after modification:
PR = "r3"
Bitbake tracks the release versions of every recipe and if the version increases it rebuilds the package(s) for that recipe.