set ubuntu-24.04 and clang version to 16

Author: Gogoshika-ga

.github/workflows/cmake.yml

@@ -31,17 +31,17 @@ jobs:
       #
       # To add more build types (Release, Debug, RelWithDebInfo, etc.) customize the build_type list.
       matrix:
-        os: [ubuntu-latest, windows-latest, macOS-latest] 
+        os: [ubuntu-24.04, windows-latest, macOS-latest] 
         build_type: ${{ fromJSON(format('[{0}]', inputs.build_type || '"Debug","Release"')) }}
         c_compiler: [gcc, clang, cl]
         include:
           - os: windows-latest
             c_compiler: cl
             cpp_compiler: cl
-          - os: ubuntu-latest
+          - os: ubuntu-24.04
             c_compiler: gcc
             cpp_compiler: g++
-          - os: ubuntu-latest
+          - os: ubuntu-24.04
             c_compiler: clang
             cpp_compiler: clang++
           - os: macOS-latest
@@ -52,7 +52,7 @@ jobs:
             c_compiler: gcc
           - os: windows-latest
             c_compiler: clang
-          - os: ubuntu-latest
+          - os: ubuntu-24.04
             c_compiler: cl
           - os: macOS-latest
             c_compiler: cl
@@ -71,6 +71,12 @@ jobs:
       run: |
         echo "build-output-dir=${{ github.workspace }}/build" >> "$GITHUB_OUTPUT"
 
+    - 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
+
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
       # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type