arpack-ng/.github/workflows/cross-build-ubuntu.yml

name: cross-build-ubuntu
on:
  workflow_dispatch:
  push:
  pull_request:

concurrency: ci-cross-build-ubuntu-${{ github.ref }}

jobs:

  cross-build:
    runs-on: ${{ matrix.os }}

    strategy:
      # Allow other runners in the matrix to continue if some fail
      fail-fast: false

      matrix:
        # List of architectures that are supported by Ubuntu:
        # https://canonical-ubuntu-packaging-guide.readthedocs-hosted.com/en/latest/reference/architectures/
        arch: [armhf, ppc64el, s390x, riscv64]
        include:
          - arch: armhf
            target-triple: arm-linux-gnueabihf
            os: ubuntu-24.04-arm
            ccache-max: 1G
            qemu-user:
          - arch: ppc64el
            target-triple: powerpc64le-linux-gnu
            os: ubuntu-24.04-arm
            ccache-max: 1G
            qemu-user: qemu-ppc64le
          - arch: s390x
            target-triple: s390x-linux-gnu
            os: ubuntu-24.04
            ccache-max: 1G
            qemu-user: qemu-s390x
          - arch: riscv64
            target-triple: riscv64-linux-gnu
            os: ubuntu-24.04-arm
            ccache-max: 1.4G
            qemu-user: qemu-riscv64

    name: cross ${{ matrix.arch }}

    env:
      CC: ${{ matrix.target-triple }}-gcc
      CXX: ${{ matrix.target-triple }}-g++
      FC: ${{ matrix.target-triple }}-gfortran

    steps:
      - name: get CPU information
        run: lscpu

      - name: checkout repository
        uses: actions/checkout@v7

      - name: install toolchain for ${{ matrix.arch }}
        run: |
          sudo apt -qq update
          sudo apt install -y \
            g++-${{ matrix.target-triple }} \
            gfortran-${{ matrix.target-triple }} \
            cmake \
            ccache \
            ${{ matrix.arch == 'armhf' && ' ' || 'qemu-user-binfmt' }}

      - name: add repositories for ${{ matrix.arch }} packages
        # deb822-style format:
        # https://manpages.ubuntu.com/manpages/noble/man5/sources.list.5.html
        run: |
          sudo dpkg --add-architecture ${{ matrix.arch }}
          case ${{ matrix.os }} in
            "ubuntu-24.04-arm")
              sudo bash -c 'cat - >/etc/apt/sources.list.d/ubuntu.sources' <<-EOF
          Types: deb
          URIs: http://ports.ubuntu.com/ubuntu-ports/
          Suites: noble noble-updates noble-backports
          Components: main restricted universe multiverse
          Architectures: arm64 ${{ matrix.arch }}
          Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg
          
          Types: deb
          URIs: http://security.ports.ubuntu.com/ubuntu-ports/
          Suites: noble-security
          Components: main restricted universe multiverse
          Architectures: arm64 ${{ matrix.arch }}
          Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg
          
          EOF
              ;;
            "ubuntu-24.04")
              sudo bash -c 'cat - >/etc/apt/sources.list.d/ubuntu.sources' <<-EOF
          Types: deb
          URIs: http://archive.ubuntu.com/ubuntu/
          Suites: noble noble-updates noble-backports
          Components: main restricted universe multiverse
          Architectures: amd64
          Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg
          
          Types: deb
          URIs: http://security.ubuntu.com/ubuntu/
          Suites: noble-security
          Components: main restricted universe multiverse
          Architectures: amd64
          Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg
          
          Types: deb
          URIs: http://ports.ubuntu.com/ubuntu-ports/
          Suites: noble noble-updates noble-backports
          Components: main restricted universe multiverse
          Architectures: ${{ matrix.arch }}
          Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg
          
          Types: deb
          URIs: http://security.ports.ubuntu.com/ubuntu-ports/
          Suites: noble-security
          Components: main restricted universe multiverse
          Architectures: ${{ matrix.arch }}
          Signed-By: /usr/share/keyrings/ubuntu-archive-keyring.gpg
          
          EOF
              ;;
          esac
          sudo apt update

      - name: install dependencies for ${{ matrix.arch }}
        run: |
          sudo apt install -y \
            openmpi-bin:${{ matrix.arch }} \
            libblas-dev:${{ matrix.arch }} \
            liblapack-dev:${{ matrix.arch }} \
            libeigen3-dev:${{ matrix.arch }}
          # Trying to install libopenmpi-dev for the cross-environment causes
          # apt to complain about missing .mod file dependencies.  Those .mod
          # files are already installed with the cross-compiler.  Ignore those
          # bogus dependency errors and install the package manually.
          apt-get download libopenmpi-dev:${{ matrix.arch }}
          sudo dpkg -i --force-depends libopenmpi-dev_*_${{ matrix.arch }}.deb

      - name: prepare ccache
        # create key with human readable timestamp
        # used in action/cache/restore and action/cache/save steps
        id: ccache-prepare
        run: |
          echo "key=ccache:cross:${{ matrix.os }}:${{ matrix.arch }}:${{ github.ref }}:$(date +"%Y-%m-%d_%H-%M-%S"):${{ github.sha }}" >> $GITHUB_OUTPUT

      - name: restore ccache
        # setup the github cache used to maintain the ccache from one job to the next
        uses: actions/cache/restore@v6
        with:
          path: ~/.ccache
          key: ${{ steps.ccache-prepare.outputs.key }}
          restore-keys: |
            ccache:cross:${{ matrix.os }}:${{ matrix.arch }}:${{ github.ref }}
            ccache:cross:${{ matrix.os }}:${{ matrix.arch }}:refs/heads/default

      - name: configure ccache
        env:
          CCACHE_MAX: ${{ matrix.ccache-max }}
        run: |
          test -d ~/.ccache || mkdir ~/.ccache
          echo "max_size = $CCACHE_MAX" >> ~/.ccache/ccache.conf
          echo "compression = true" >> ~/.ccache/ccache.conf
          ccache -s
          echo "/usr/lib/ccache" >> $GITHUB_PATH

      - name: configure
        run: |
          echo $PATH
          echo which ccache
          which ccache
          echo which $CC
          which $CC
          echo $CC --version
          $CC --version
          echo which $CXX
          which $CXX
          echo $CXX --version
          $CXX --version
          echo which $FC
          which $FC
          echo $FC --version
          $FC --version
          mkdir -p ${GITHUB_WORKSPACE}/build && cd ${GITHUB_WORKSPACE}/build
          echo "::group::Configure with CMake"
          cmake \
            -DEXAMPLES=ON \
            -DMPI=OFF \
            -DICB=ON \
            -DEIGEN=ON \
            -DCMAKE_C_COMPILER_LAUNCHER="ccache" \
            -DCMAKE_CXX_COMPILER_LAUNCHER="ccache" \
            -DBLA_VENDOR="Generic" \
            ..
          echo "::endgroup::"

      - name: build
        run: |
          cd ${GITHUB_WORKSPACE}/build
          cmake --build .

      - name: ccache status
        continue-on-error: true
        run: ccache -s

      - name: save ccache
        # Save the cache after we are done (successfully) building
        uses: actions/cache/save@v6
        with:
          path: ~/.ccache
          key: ${{ steps.ccache-prepare.outputs.key }}

      - name: test
        env:
          driver: ${{ matrix.qemu-user }}
        run: |
          cd ${GITHUB_WORKSPACE}/build
          CTEST_OUTPUT_ON_FAILURE=1 ctest .