CI: Provides cross-compile builds for armhf, ppc64le, and s390x

.github/workflows/linux_qemu.yml

@@ -0,0 +1,99 @@
+# Meson's Python module doesn't support crosscompiling,
+# and python dependencies may be another potential hurdle.
+# There might also be a need to run runtime tests during configure time.
+#
+# The recommended practice is to rely on Docker to provide the x86_64 crosscompile toolchain,
+# enabling native execution via binfmt.
+#
+# In simpler terms, everything except the crosscompile toolchain will be emulated.
+
+name: Test Linux Qemu
+
+on:
+  pull_request:
+    branches:
+      - main
+      - maintenance/**
+
+defaults:
+  run:
+    shell: bash
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  meson_spin:
+    if: "github.repository == 'numpy/numpy'"
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        ARCH: [
+          ["armhf", "arm-linux-gnueabihf", "arm32v7/ubuntu:22.04"],
+        ]
+    env:
+      QEMU_NAME: ${{ matrix.ARCH[0] }}
+      TOOLCHAIN_NAME: ${{ matrix.ARCH[1] }}
+      DOCKER_CONTAINER: ${{ matrix.ARCH[2] }}
+      CC: ${{ matrix.ARCH[1] }}-gcc
+      CXX: ${{ matrix.ARCH[1] }}-g++
+
+    name: "Test Linux Qemu(${matrix.ARCH[0]})"
+    steps:
+    - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
+      with:
+        submodules: recursive
+        fetch-depth: 0
+
+    - name: Initialize binfmt_misc for qemu-user-static
+      run: |
+        docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
+
+    - name: Creates new container
+      run: |
+        sudo apt update
+        sudo apt install -y ninja-build gcc-${TOOLCHAIN_NAME} g++-${TOOLCHAIN_NAME} gfortran-${TOOLCHAIN_NAME}
+        docker run --name the_container --interactive -v /:/host -v $(pwd):/numpy ${DOCKER_CONTAINER} /bin/bash -c "
+          apt update &&
+          apt install -y git python3 python-is-python3 python3-dev python3-pip
+          ln -s /host/lib64 /lib64 &&
+          ln -s /host/lib/x86_64-linux-gnu /lib/x86_64-linux-gnu &&
+          ln -s /host/usr/${TOOLCHAIN_NAME} /usr/${TOOLCHAIN_NAME} &&
+          rm -rf /usr/lib/gcc/${TOOLCHAIN_NAME} && ln -s /host/usr/lib/gcc-cross/${TOOLCHAIN_NAME} /usr/lib/gcc/${TOOLCHAIN_NAME} &&
+          rm -f /usr/bin/${TOOLCHAIN_NAME}-gcc && ln -s /host/usr/bin/${TOOLCHAIN_NAME}-gcc /usr/bin/${TOOLCHAIN_NAME}-gcc &&
+          rm -f /usr/bin/${TOOLCHAIN_NAME}-g++ && ln -s /host/usr/bin/${TOOLCHAIN_NAME}-g++ /usr/bin/${TOOLCHAIN_NAME}-g++ &&
+          rm -f /usr/bin/${TOOLCHAIN_NAME}-gfortran && ln -s /host/usr/bin/${TOOLCHAIN_NAME}-gfortran /usr/bin/${TOOLCHAIN_NAME}-gfortran &&
+          rm -f /usr/bin/${TOOLCHAIN_NAME}-ar && ln -s /host/usr/bin/${TOOLCHAIN_NAME}-ar /usr/bin/${TOOLCHAIN_NAME}-ar &&
+          rm -f /usr/bin/${TOOLCHAIN_NAME}-as && ln -s /host/usr/bin/${TOOLCHAIN_NAME}-as /usr/bin/${TOOLCHAIN_NAME}-as &&
+          rm -f /usr/bin/${TOOLCHAIN_NAME}-ld && ln -s /host/usr/bin/${TOOLCHAIN_NAME}-ld /usr/bin/${TOOLCHAIN_NAME}-ld &&
+          rm -f /usr/bin/${TOOLCHAIN_NAME}-ld.bfd && ln -s /host/usr/bin/${TOOLCHAIN_NAME}-ld.bfd /usr/bin/${TOOLCHAIN_NAME}-ld.bfd &&
+          rm -f /usr/bin/ninja && ln -s /host/usr/bin/ninja /usr/bin/ninja
+          python -m pip install meson-python>=0.13.1 Cython>=3.0 wheel==0.38.1 spin==0.5
+          python -m pip install pytest pytest-xdist hypothesis typing_extensions
+        "
+        docker commit the_container the_container
+
+    - name: Build
+      run: |
+        sudo docker run --name the_build --interactive -v $(pwd):/numpy -v /:/host the_container /bin/bash -c "
+          uname -a &&
+          gcc --version &&
+          g++ --version &&
+          ${TOOLCHAIN_NAME}-gfortran --version &&
+          python --version &&
+          git config --global --add safe.directory /numpy
+          cd /numpy &&
+          spin build --clean -- -Dallow-noblas=true
+        "
+        docker commit the_build the_build
+
+    - name: Meson Log
+      if: failure()
+      run: 'cat build/meson-logs/meson-log.txt'
+
+    - name: Run Tests
+      run: |
+        docker run --rm --interactive -v $(pwd):/numpy the_build /bin/bash -c "
+          cd /numpy && spin test -- -k 'test_simd or test_kind'
+        "