gateway-dk-ask: pin ASK with libxml2 2.12+ compat fix for fmc

[tomazzaman]

Description

Update the ASK repo pin to a commit that adds a libxml2 compatibility patch for fmc.

Newer libxml2 (2.12.0+, released Oct 2023) changed the xmlStructuredErrorFunc callback signature to take a const xmlError * instead of xmlError *. Without the patch, fmc fails to compile against libxml2 2.12+ headers, breaking builds against newer distributions.

The patch in the ASK repo uses a LIBXML_VERSION preprocessor check to select the correct callback signature for both old and new libxml2.

Distribution coverage

Distribution	libxml2	Status
Debian Trixie	2.9.14 (despite version string)	OK
Ubuntu Noble (24.04 LTS)	2.9.14	OK
Ubuntu Resolute (26.04 dev)	2.12+	Was broken, now fixed

How Has This Been Tested?

• Built locally with `RELEASE=trixie` (passes)
• Built locally with `RELEASE=noble` (passes)
• Built locally with `RELEASE= resolute` (passes)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• My changes generate no new warnings

Summary by CodeRabbit

• Chores
  • Updated pinned source revision for a build dependency.

[coderabbitai]

📝 Walkthrough

Walkthrough

Updated a pinned ASK source commit in extensions/gateway-dk-ask.sh and applied const-correctness changes to local pointer variables in tools/lib/bpf/libbpf.c within a kernel archive patch; no control-flow or public API changes were introduced.

Changes

Cohort / File(s)	Summary
ASK Source Revision Update extensions/gateway-dk-ask.sh	Changed ASK_BRANCH pinned commit from commit:252b6db5a274383917c7a7688c931d61409978c2 to commit:9ea9bda759de70f75fc994fdc8bfa83a54f66f67.
libbpf const-correctness patch/kernel/archive/ls1046a-6.12/004-libbpf-const-correctness-for-newer-glibc.patch, tools/lib/bpf/libbpf.c	Changed local variables receiving strstr()/strchr() results from char * to const char * in kallsyms_cb() and resolve_full_path(); no logic or API changes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

A hop, a skip, a commit so bright,
I swapped a hash beneath moonlight,
Const whispers tucked in code with care,
A rabbit's nibble, small and fair. 🐇✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: pinning ASK to a commit with a libxml2 2.12+ compatibility fix, which matches the core objective of fixing fmc compilation against newer libxml2.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[tomazzaman]

Went ahead and fixed the headers issue as well, however, identified another bug, so I'm fixing the whole ASK patching process for future-proofness. Will push soon.