Use cmake_additional_param

Author: pifopi

.github/workflows/cpp-ci-serial-programs.yml

@@ -10,15 +10,25 @@ jobs:
       fail-fast: false
       matrix:
         os: [windows-2025, macos-13, ubuntu-24.04]
-        toolset: ['']
+        compiler: ['default', 'clang']
         qt_version: ['6.9.0']
         include:
           - qt_version: '6.9.0'
             qt_version_major: '6'
             qt_modules: 'qtmultimedia qtserialport'
 
           - os: 'windows-2025'
-            toolset: '-T ClangCL'
+            compiler: 'clang'
+            cmake_additional_param: '-T ClangCL'
+
+          - os: 'ubuntu-24.04'
+            compiler: 'clang'
+            cmake_additional_param: '-DCMAKE_CXX_COMPILER=clang++'
+
+        exclude:
+          - os: 'macos-13'
+            compiler: 'clang'
+            # Excluded because macos default toolset is already clang
 
     steps:
     - uses: actions/checkout@v4
@@ -46,7 +56,7 @@ jobs:
         cd Arduino-Source/SerialPrograms
         mkdir bin
         cd bin
-        cmake .. -DQT_MAJOR:STRING=${{ matrix.qt_version_major }} ${{ matrix.toolset }}
+        cmake .. -DQT_MAJOR:STRING=${{ matrix.qt_version_major }} ${{ matrix.cmake_additional_param }}
         cmake --build . --config Release --parallel 10
     - name: Copy resources
       if: startsWith(matrix.os, 'windows')