From 492f87240bf4ab083e65163600f45f1022d51a99 Mon Sep 17 00:00:00 2001
From: Dirk Stolle <striezel-dev@web.de>
Date: Sat, 25 Jan 2025 02:32:29 +0100
Subject: [PATCH] Fix failing Clang builds on GitHub Actions

A while ago the 'ubuntu-latest' image moved from Ubuntu 22.04 to
Ubuntu 24.04. See <https://github.com/actions/runner-images/issues/10636>.
However, Ubuntu 24.04 does not have packages for Clang 11 and 12
anymore, thus the Clang jobs failed when they tried to install
the corresponding compilers. Therefore, the workflow is changed
to use 'ubuntu-22.04' instead of 'ubuntu-latest'.
---
 .github/workflows/ci.yml | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5f71330..83bf763 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -47,9 +47,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        version: [11, 12]
+        include:
+          - version: 11
+            os: 'ubuntu-22.04'
+          - version: 12
+            os: 'ubuntu-22.04'
 
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
 
     steps:
       - uses: actions/checkout@v4
@@ -61,7 +65,7 @@ jobs:
         env:
           CXX: clang-${{ matrix.version }}
         run: cmake -S . -B build
-          -D CMAKE_CXX_COMPILER=clang++
+          -D CMAKE_CXX_COMPILER=clang++-${{ matrix.version }}
           -D CMAKE_BUILD_TYPE:STRING=Release
           -D ${{ env.PROJECT }}_OPT_SELECT_NONSTD=ON
           -D ${{ env.PROJECT }}_OPT_BUILD_TESTS=ON