name: Arm cross-compilation build
on: [push, pull_request]
concurrency:
  group: ${{ github.workflow }}-${{ github.job }}-${{ github.ref }}
  cancel-in-progress: true
jobs:
  build:
    runs-on: ubuntu-20.04
    name: '${{ matrix.target.arch }}, ${{ matrix.sys.compiler }} ${{ matrix.sys.version }}'
    strategy:
      matrix:
        target:
          - { platform: 'arm',     arch: 'armv7-a', dir: 'arm-linux-gnueabihf', flags: '-mfpu=neon' }
          - { platform: 'aarch64', arch: 'armv8-a', dir: 'aarch64-linux-gnu', flags: '' }
        sys:
          - { compiler: 'gcc',   version: '8' }
          - { compiler: 'clang', version: 'latest' }
    steps:
    - name: Setup compiler
      if: ${{ matrix.sys.compiler == 'clang' }}
      run: |
        LLVM_VERSION=${{ matrix.sys.version }}
        wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add - || exit 1
        if [[ $LLVM_VERSION -eq 'latest' ]]; then
          sudo add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal main" || exit 1
        else
          sudo add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal-$LLVM_VERSION main" || exit 1
        fi
        sudo apt-get update || exit 1
        if [[ $LLVM_VERSION -eq 'latest' ]]; then
          sudo apt-get --no-install-suggests --no-install-recommends install clang || exit 1
        else
          sudo apt-get --no-install-suggests --no-install-recommends install clang-$LLVM_VERSION || exit 1
        fi
        sudo apt-get --no-install-suggests --no-install-recommends install g++-9-${{ matrix.target.dir }} g++-9-multilib || exit 1
    - name: Setup compiler
      if: ${{ matrix.sys.compiler == 'gcc' }}
      run: |
        sudo apt-get update || exit 1
        sudo apt-get --no-install-suggests --no-install-recommends install g++-${{ matrix.sys.version }}-${{ matrix.target.dir }} g++-${{ matrix.sys.version }}-multilib || exit 1
        sudo update-alternatives --remove-all ${{ matrix.target.dir }}-gcc || true
        sudo update-alternatives --remove-all ${{ matrix.target.dir }}-g++ || true
        sudo update-alternatives --install /usr/bin/${{ matrix.target.dir }}-gcc ${{ matrix.target.dir }}-gcc /usr/bin/${{ matrix.target.dir }}-gcc-${{ matrix.sys.version }} 20
        sudo update-alternatives --install /usr/bin/${{ matrix.target.dir }}-g++ ${{ matrix.target.dir }}-g++ /usr/bin/${{ matrix.target.dir }}-g++-${{ matrix.sys.version }} 20
    - name: Setup QEMU
      run: |
        sudo apt-get --no-install-suggests --no-install-recommends install qemu-user
    - name: Setup Ninja
      run: |
        sudo apt-get install ninja-build
    - name: Checkout xsimd
      uses: actions/checkout@v2
    - name: Setup
      run: |
        mkdir _build
        cd _build && cmake .. -DBUILD_TESTS=ON -DDOWNLOAD_DOCTEST=ON -DBUILD_BENCHMARK=ON -DBUILD_EXAMPLES=ON -DCMAKE_BUILD_TYPE=Release -DTARGET_ARCH=generic -DCMAKE_C_FLAGS="-march=${{ matrix.target.arch }} ${{ matrix.target.flags }}" -DCMAKE_CXX_FLAGS="-march=${{ matrix.target.arch }} ${{ matrix.target.flags }}" -DCMAKE_TOOLCHAIN_FILE=${{ github.workspace }}/.github/toolchains/${{ matrix.sys.compiler }}-${{ matrix.target.dir }}.cmake
    - name: Build
      run: cmake --build _build
    - name: Testing xsimd
      run: |
        qemu-${{ matrix.target.platform }} -L /usr/${{ matrix.target.dir}}/ ./test/test_xsimd
      working-directory: ${{ github.workspace }}/_build
