Release 5.3 (whinlatter)

Migration notes for 5.3 (whinlatter)

This section provides migration information for moving to the Yocto Project 5.3 Release (codename “whinlatter”) from the prior release.

Supported kernel versions

The OLDEST_KERNEL setting is XXX in this release, meaning that out the box, older kernels are not supported. See 4.3 migration notes for details.

Supported distributions

Compared to the previous releases, running BitBake is supported on new GNU/Linux distributions:

XXX

On the other hand, some earlier distributions are no longer supported:

XXX

See all supported distributions.

Rust language changes

systemd changes

Recipe changes

Removed variables

The following variables have been removed:

Removed recipes

The following recipes have been removed in this release:

Removed classes

The following classes have been removed in this release:

kernel-fitimage.bbclass: the class has been replaced by the kernel-fit-image class. The new implementation resolves the long-standing bug 12912.

If you are using the kernel FIT image support, you will need to:
1. Make sure to include kernel-fit-extra-artifacts in your KERNEL_CLASSES variable to ensure the required files are exposed to the DEPLOY_DIR_IMAGE directory:
```
KERNEL_CLASSES += "kernel-fit-extra-artifacts"
```
2. Use the specific FIT image recipe rather than the base kernel recipe. For example, instead of:
```
bitbake linux-yocto
```
  the FIT image is now build by:
```
bitbake linux-yocto-fitimage
```
  For custom kernel recipes, creating a corresponding custom FIT image recipe is usually a good approach.
3. If a FIT image is used as a replacement for the kernel image in the root filesystem, add the following configuration to your machine configuration file:
```
# Create and deploy the vmlinux artifact which gets included into the FIT image
KERNEL_CLASSES += "kernel-fit-extra-artifacts"

# Do not install the kernel image package
RRECOMMENDS:${KERNEL_PACKAGE_NAME}-base = ""
# Install the FIT image package
MACHINE_ESSENTIAL_EXTRA_RDEPENDS += "linux-yocto-fitimage"

# Configure the image.bbclass to depend on the FIT image instead of only
# the kernel to ensure the FIT image is built and deployed with the image
KERNEL_DEPLOY_DEPEND = "linux-yocto-fitimage:do_deploy"
```
See the kernel-fit-image section for more information.

Removed features

The following features have been removed in this release:

Miscellaneous changes