Update cmake.yml

Author: Gogoshika-ga

.github/workflows/cmake.yml

@@ -71,6 +71,20 @@ jobs:
       run: |
         echo "build-output-dir=${{ github.workspace }}/build" >> "$GITHUB_OUTPUT"
 
+    - name: Install Clang and Libraries
+      if: matrix.os == 'ubuntu-22.04' && matrix.c_compiler == 'clang'
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y clang libc++-dev libc++abi-dev
+
+    - name: Set Clang 16 as Default
+      if: matrix.os == 'ubuntu-24.04' && matrix.c_compiler == 'clang'
+      run: |
+        sudo update-alternatives --install /usr/bin/clang clang /usr/bin/clang-16 100
+        sudo update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-16 100
+        sudo update-alternatives --set clang /usr/bin/clang-16
+        sudo update-alternatives --set clang++ /usr/bin/clang++-16
+
     - name: Check Clang Settings
       if: matrix.os == 'ubuntu-22.04' && matrix.c_compiler == 'clang'
       run: |