alpine.yaml

# .github/workflows/alpine.yaml

name: Build on Alpine Linux (Chroot)

on:
  workflow_dispatch: {}
  push:
    branches: [ test ]

jobs:

  build:
    strategy:
      fail-fast: false
      matrix:
        target: [
          "x86_64", "x86", "aarch64", "armhf", "ppc64le", "armv7"
        ]
        compiler:
        - { apk: "g++",     GCC: "gcc",      GXX: "g++"        }
        - { apk: "clang14", GCC: "clang-14", GXX: "clang++-14" }
        - { apk: "clang15", GCC: "clang-15", GXX: "clang++-15" }
        - { apk: "clang16", GCC: "clang-16", GXX: "clang++-16" }
        - { apk: "clang17", GCC: "clang-17", GXX: "clang++-17" }
    name: Build on Alpine Linux for ${{matrix.target}} with ${{matrix.compiler.GCC}}
    runs-on: ubuntu-22.04

    defaults:
      run:
        shell: bash

    steps:

    - name: Machine Information
      run: |
        lscpu; free -h; df -h .
    - name: System Information
      run: |
        date; uname -a; uptime; cat /etc/os-release; ls -C /boot || :
    - name: Context Information
      run: |
        tty || :; id; printf %s\\n "$SHELL"; printf %s\\n "$PATH"; pwd

    - name: Setup Host System
      run: |
        set -x
        sudo apt-get update
        sudo apt-get install qemu-user-static
    - name: Setup Alpine Linux Chroot
      run: |

        wget -q -O- https://dl-cdn.alpinelinux.org/alpine/v3.19/releases/${{matrix.target}}/alpine-minirootfs-3.19.1-${{matrix.target}}.tar.gz |
           (sudo mkdir /srv/alpine && sudo tar xz -C /srv/alpine)
        (for d in dev proc sys; do sudo mount --rbind -o ro {,/srv/alpine}/"$d"; done)
        (for d in run tmp; do sudo mount {-t,}tmpfs /srv/alpine/"$d"; done)
        sudo cp -L /etc/resolv.conf /srv/alpine/etc

        sudo chroot /srv/alpine su - <<'END'
           uname -a && pwd && printf %s\\n "$PATH"
        END

        sudo chroot /srv/alpine su - <<'END'
           set -x; addgroup -g127 docker && adduser -D -u1001 -Gdocker -s/bin/ash runner && delgroup runner docker
        END
        (set -x; sudo mount --rbind . /srv/alpine/home/runner)

        sudo chroot /srv/alpine su - <<'END'
           apk update && apk add ${{matrix.compiler.apk}} libc-dev make
        END

    - name: Build Tools Information
      run: |
        sudo chroot /srv/alpine su - <<'END'
           make --version; ${{matrix.compiler.GCC}} --version
        END

    - name: Checkout
      uses: actions/checkout@v4

    - name: Run Make (and Check)
      run: |
        sudo chroot /srv/alpine su - runner <<'END'
           make -j3 run \
              CFLAGS='-Wno-psabi -O3 -fno-stack-protector -fcf-protection=none' \
              GCC='${{matrix.compiler.GCC}}' \
              GXX='${{matrix.compiler.GXX}}' \
              MARCH=
        END

    - name: Upload Results
      uses: actions/upload-artifact@v4
      with:
        name: build-${{matrix.target}}-${{matrix.compiler.GCC}}
        path: build