Azure Linux 4.0 .NET 11 build images — package blockers

[richlander]

Context

We are porting the full src/azurelinux/3.0/net11.0/ image graph (29 Dockerfiles) to Azure Linux 4.0. Azure Linux 4.0 is based on Fedora 44, which changes several packages.

Most images can be ported with straightforward package renames (see "Resolved" below), but a few packages are missing entirely from AzL 4.0 repos.

Blockers

1. debootstrap — not available in AzL 4.0

• Used by: crossdeps-builder/amd64 (Tier 1 image)
• Impact: Blocks all 18 cross/* images, plus android, webassembly, and crossdeps-llvm (24 of 29 images)
• Purpose: Used by build-rootfs.sh to bootstrap Ubuntu/Debian rootfs for cross-compilation
• Possible fix: Install from source (it is a shell script), or find an alternative repo

2. libbsd-devel — not available in AzL 4.0

• Used by: crossdeps-builder/amd64
• Impact: Same as above — blocks the cross-compilation chain
• Note: The base libbsd runtime package is available, but the -devel headers are not
• Previous source: Was installed from the AzL 3.0 extended repo (packages.microsoft.com/azurelinux/3.0/prod/extended/...)

3. No AzL 4.0 extended repo

• The extended repo URL pattern https://packages.microsoft.com/azurelinux/4.0/prod/extended/x86_64/config.repo returns 404
• Impact: Any package that was only available in the extended repo (e.g., libbsd-devel) cannot be installed
• Used by: crossdeps-builder/amd64

4. powershell — not available in AzL 4.0

• Used by: crossdeps/amd64, build/amd64
• Impact: These images need PowerShell for Azure DevOps functionality
• Workaround available: COPY from mcr.microsoft.com/dotnet/sdk:10.0-azurelinux3.0 (validated locally)

5. mcr.microsoft.com/dotnet/runtime-deps — no AzL 4.0 variant

• Used by: build/amd64 (as base image: runtime-deps:10.0-azurelinux3.0)
• Impact: The build image cannot use the standard .NET runtime-deps base
• Workaround available: Inline the runtime dependencies (icu, etc.) on top of core:4.0 and COPY the .NET runtime from mcr.microsoft.com/dotnet/runtime:10.0-azurelinux3.0
• Note: This workaround creates a dependency on the AzL 3.0 runtime/SDK images as COPY sources. Once runtime-deps is available for AzL 4.0, the build image should be rebased.

Resolved Package Renames

These have been verified against AzL 4.0 repos and have working replacements:

AzL 3.0 Package	AzL 4.0 Package	Affected Images
tdnf (pkg manager)	dnf	All
ca-certificates-microsoft	ca-certificates	crossdeps, build
awk	gawk	crossdeps, fpm, freebsd cross
build-essential	gcc + make	fpm
moby-cli	docker-cli	android/docker
wget	wget2-wget	crossdeps-builder, opt, android, crossdeps
zlib-devel	zlib-ng-compat-devel	crossdeps-builder, opt
libgcc-atomic	libatomic	helix (already ported)
libmsquic	removed (unavailable)	helix (already ported)
powershell	COPY from SDK image	crossdeps, build

Other Notes

• The FreeBSD cross images have an AzL 3.0-specific workaround for liblzma.so symlink. On AzL 4.0, the library path is /usr/lib64/ instead of /usr/lib/. This needs updating but is not a blocker.
• The openjdk/jdk:17-mariner image used by android/amd64 is an external dependency and does not need porting.

[am11]

#1 debootstrap is removed in #1655.

#2 libbsd is built from source on FreeBSD with #1657.

#3 is not needed any more because of #2.

[richlander]

Does that means we're good to go?

[richlander]

Looks like it.