Add GitHub CI workflow

.github/workflows/cmake-multi-platform.yml

@@ -0,0 +1,73 @@
+name: CMake on multiple platforms
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+        build_type: [Release]
+        c_compiler: [gcc, clang-16, cl]
+        include:
+          - os: windows-latest
+            c_compiler: cl
+            cpp_compiler: cl
+          - os: ubuntu-latest
+            c_compiler: gcc
+            cpp_compiler: g++
+          - os: ubuntu-latest
+            c_compiler: clang-16
+            cpp_compiler: clang++-16
+        exclude:
+          - os: windows-latest
+            c_compiler: gcc
+          - os: windows-latest
+            c_compiler: clang-16
+          - os: ubuntu-latest
+            c_compiler: cl
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set reusable strings
+      # Turn repeated input strings (such as the build output directory) into step outputs. These step outputs can be used throughout the workflow file.
+      id: strings
+      shell: bash
+      run: |
+        echo "build-output-dir=${{ github.workspace }}/build" >> "$GITHUB_OUTPUT"
+
+    - name: Install Clang 16
+      if: matrix.cpp_compiler == 'clang++-16'
+      run: |
+         wget https://apt.llvm.org/llvm.sh
+         chmod +x ./llvm.sh
+         sudo ./llvm.sh 16
+
+    - name: Install vcpkg
+      run: |
+        git clone https://github.com/microsoft/vcpkg.git
+        ${{ matrix.os == 'windows-latest' && '.\vcpkg\bootstrap-vcpkg.bat' || './vcpkg/bootstrap-vcpkg.sh' }}        
+
+    - 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
+      run: >
+        cmake -B ${{ steps.strings.outputs.build-output-dir }}
+        -DCMAKE_TOOLCHAIN_FILE=${{ github.workspace }}/vcpkg/scripts/buildsystems/vcpkg.cmake
+        -DCMAKE_CXX_COMPILER=${{ matrix.cpp_compiler }}
+        -DCMAKE_C_COMPILER=${{ matrix.c_compiler }}
+        -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
+        ${{ matrix.cpp_compiler == 'clang++-16' && '-DCMAKE_CXX_FLAGS="-stdlib=libstdc++"' || '' }}
+        -S ${{ github.workspace }}
+
+    - name: Build
+      # Build your program with the given configuration. Note that --config is needed because the default Windows generator is a multi-config generator (Visual Studio generator).
+      run: cmake --build ${{ steps.strings.outputs.build-output-dir }} --config ${{ matrix.build_type }}