[llvm] [Github] Make libcxx generated files check run on workflow changes (PR #226020)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 created https://github.com/llvm/llvm-project/pull/226020

This is according to our own CI best practices and would have caught the issues caused by upgrading to Ubuntu 26.04 before merging.

>From c0be5f14bea0294561c6d20ed310ce72d2c8af9c Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman at google.com>
Date: Thu, 24 Sep 2026 05:02:58 +0000
Subject: [PATCH] [Github] Make libcxx generated files check run on workflow
 changes

This is according to our own CI best practices and would have caught the
issues caused by upgrading to Ubuntu 26.04 before merging.
---
 .github/workflows/libcxx-pr-check-generated-files.yml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/libcxx-pr-check-generated-files.yml b/.github/workflows/libcxx-pr-check-generated-files.yml
index ca7d58ef183e1..ffe5211033d08 100644
--- a/.github/workflows/libcxx-pr-check-generated-files.yml
+++ b/.github/workflows/libcxx-pr-check-generated-files.yml
@@ -3,13 +3,14 @@ on:
   pull_request:
     paths:
       - 'libcxx/**'
+      - '.github/workflows/libcxx-pr-check-generated-files.yml'
 
 permissions:
   contents: read
 
 jobs:
   check_generated_files:
-    runs-on: ubuntu-26.04
+    runs-on: ubuntu-24.04
     if: github.repository == 'llvm/llvm-project'
     steps:
       - name: Fetch LLVM sources