Add GitHub actions

.github/workflows/cmake.yml

@@ -0,0 +1,126 @@
+name: CMake
+
+on: [push, pull_request]
+
+env:
+  # Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
+  BUILD_TYPE: Release
+
+jobs:
+  build:
+    # The CMake configure and build commands are platform agnostic and should work equally
+    # well on Windows or Mac.  You can convert this to a matrix build if you need
+    # cross-platform coverage.
+    # See: https://docs.github.com/en/actions/configuring-and-managing-workflows/configuring-a-workflow#configuring-a-build-matrix
+    name: ${{ matrix.config.name }}
+    runs-on: ${{ matrix.config.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+          - {
+            name: "Linux g++ 10.2",
+            os: ubuntu-20.04,
+            cxx: "g++-10",
+          }
+          - {
+            name: "Linux clang-10",
+            os: ubuntu-20.04,
+            cxx: "clang++-10",
+            cxx_flags: -stdlib=libc++,
+            exe_linker_flags: -lc++,
+          }
+          - {
+            name: "Linux clang-11",
+            os: ubuntu-20.04,
+            cxx: "clang++-11",
+            cxx_flags: -stdlib=libc++,
+            exe_linker_flags: -lc++,
+          }
+          - {
+            name: "Windows MSVC 2017 (x64)",
+            os: windows-2016,
+            cxx: "cl",
+            environment_script: "C:/Program Files (x86)/Microsoft Visual Studio/2017/Enterprise/VC/Auxiliary/Build/vcvars64.bat",
+          }
+          - {
+            name: "Windows MSVC 2019 (x64)",
+            os: windows-latest,
+            cxx: "cl",
+            environment_script: "C:/Program Files (x86)/Microsoft Visual Studio/2019/Enterprise/VC/Auxiliary/Build/vcvars64.bat",
+          }
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Install Clang 10
+      id: install_clang_10
+      if: startsWith(matrix.config.os, 'ubuntu') && ( matrix.config.cxx == 'clang++-10' )
+      shell: bash
+      working-directory: ${{ env.HOME }}
+      run: |
+        wget https://apt.llvm.org/llvm.sh
+        chmod +x llvm.sh
+        sudo ./llvm.sh 10
+        sudo apt-get install libc++-10-dev libc++abi-10-dev
+
+    - name: Install Clang 11
+      id: install_clang_11
+      if: startsWith(matrix.config.os, 'ubuntu') && ( matrix.config.cxx == 'clang++-11' )
+      shell: bash
+      working-directory: ${{ env.HOME }}
+      run: |
+        wget https://apt.llvm.org/llvm.sh
+        chmod +x llvm.sh
+        sudo ./llvm.sh 11
+        sudo apt-get install libc++-11-dev libc++abi-11-dev
+
+    - name: Install g++ 10
+      id: install_gcc_10
+      if: startsWith(matrix.config.os, 'ubuntu') && ( matrix.config.cxx == 'g++-10' )
+      shell: bash
+      working-directory: ${{ env.HOME }}
+      run: |
+        sudo add-apt-repository ppa:ubuntu-toolchain-r/ppa
+        sudo apt-get install g++-10
+
+    - name: Create Build Environment
+      # Some projects don't allow in-source building, so create a separate build directory
+      # We'll use this as our working directory for all subsequent commands
+      run: cmake -E make_directory ${{runner.workspace}}/build
+
+    - name: Configure CMake
+      # Use a bash shell so we can use the same syntax for environment variable
+      # access regardless of the host operating system
+      shell: bash
+      working-directory: ${{runner.workspace}}/build
+      env: 
+        CXX: ${{ matrix.config.cxx }}
+      # Note the current convention is to use the -S and -B options here to specify source 
+      # and build directories, but this is only available with CMake 3.13 and higher.  
+      # The CMake binaries on the Github Actions machines are (as of this writing) 3.12
+      run: |
+        # run environment setup script if any
+        [ -n "${{ matrix.config.environment_script }}" ] && "${{ matrix.config.environment_script }}"
+
+        cmake $GITHUB_WORKSPACE \
+          -DCMAKE_BUILD_TYPE=$BUILD_TYPE \
+          -DCMAKE_CXX_STANDARD=20 \
+          -DBUILD_TESTING=ON \
+          -DCMAKE_CXX_FLAGS=${{ matrix.config.cxx_flags }} \
+          -DCMAKE_EXE_LINKER_FLAGS=${{ matrix.config.exe_linker_flags }} \
+          -DCMAKE_VERBOSE_MAKEFILE=ON
+
+    - name: Build
+      working-directory: ${{runner.workspace}}/build
+      shell: bash
+      # Execute the build.  You can specify a specific target with "--target <NAME>"
+      run: cmake --build . --config $BUILD_TYPE
+
+    - name: Test
+      working-directory: ${{runner.workspace}}/build
+      shell: bash
+      # Execute tests defined by the CMake configuration.  
+      # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
+      run: ctest --output-on-failure -C $BUILD_TYPE