build_mingw.yml

---
name: Windows / MinGW / CPU tests

permissions:
  contents: read

on:
  push:
  workflow_dispatch:
  pull_request:
    paths-ignore:
      - 'doc/**'
      - 'CHANGES'
      - 'COPYING'
      - 'CREDITS'
      - 'LICENSE'
      - 'README.*'

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref || github.run_id }}
  cancel-in-progress: true

jobs:
  mingw_test_matrix:
    name: LLVM ${{ matrix.llvm_version }} - MinGW ${{ matrix.config }}
    runs-on: windows-latest
    defaults:
      run:
        shell: msys2 {0}
    strategy:
      fail-fast: false
      matrix:
        llvm_version: [18, 19]
        config: [cpu]

    steps:
      - name: Setup MSYS2
        uses: msys2/setup-msys2@d44ca8e88d8b43d56cf5670f91747359d5537f97 # v2.26.0
        with:
          msystem: MINGW64
          update: true
          install: >-
            mingw-w64-x86_64-gcc
            mingw-w64-x86_64-cmake
            mingw-w64-x86_64-ninja
            mingw-w64-x86_64-hwloc
            mingw-w64-x86_64-pkg-config

      - name: Checkout PoCL
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683

      - name: Setup Build Environment
        run: |
          # Convert the Windows workspace path to an MSYS2 compatible one
          WORKSPACE=$(cygpath -u "${{ github.workspace }}")
          echo "WORKSPACE=${WORKSPACE}" >> $GITHUB_ENV

      - name: Checkout LLVM
        id: checkout-llvm
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
        with:
          repository: llvm/llvm-project
          ref: release/${{ matrix.llvm_version }}.x
          path: llvm-project

      - name: Restore Cached LLVM
        id: cache-llvm
        uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57
        with:
          path: install-llvm
          key: llvm-mingw-${{ matrix.llvm_version }}-${{ runner.os }}

      - if: ${{ steps.cache-llvm.outputs.cache-hit != 'true' }}
        name: Configure LLVM
        run: |
          cmake -S llvm-project/llvm -B build-llvm \
            -DCMAKE_BUILD_TYPE=Release \
            -DLLVM_ENABLE_PROJECTS=clang \
            -DLLVM_TARGETS_TO_BUILD=host \
            -DCMAKE_INSTALL_PREFIX=${{ env.WORKSPACE }}/install-llvm \
            -DLLVM_BUILD_LLVM_DYLIB=ON \
            -DLLVM_LINK_LLVM_DYLIB=ON \
            -G "Ninja"
        # XXX: DYLIBs are necessary to work around export ordinal overflows

      - if: ${{ steps.cache-llvm.outputs.cache-hit != 'true' }}
        name: Build LLVM
        run: |
          cmake --build build-llvm
          cmake --install build-llvm

      - if: ${{ steps.cache-llvm.outputs.cache-hit != 'true' }}
        name: Save LLVM
        uses: actions/cache/save@1bd1e32a3bdc45362d1e726936510720a7c30a57
        with:
          path: install-llvm
          key: llvm-mingw-${{ matrix.llvm_version }}-${{ runner.os }}

      - name: Load Env vars
        id: load-env
        run: |
          cat ${{ env.WORKSPACE }}/.github/variables.txt >> $GITHUB_ENV

      - name: Configure PoCL
        run: |
          cmake -S ${{ env.WORKSPACE }} -B ${{ env.WORKSPACE }}/build-pocl \
            -DCMAKE_BUILD_TYPE=Release \
            -DCMAKE_INSTALL_PREFIX=${{ env.WORKSPACE }}/install-pocl \
            -DWITH_LLVM_CONFIG=${{ env.WORKSPACE }}/install-llvm/bin/llvm-config.exe \
            -DBUILD_SHARED_LIBS=OFF \
            -DENABLE_ICD=OFF \
            -DENABLE_LOADABLE_DRIVERS=OFF \
            -G "Ninja"
        # XXX: ENABLE_ICD=OFF because ocl-icd doesn't support Windows,
        #      and PoCL doesn't support Khronos' ICD loader
        # XXX: BUILD_SHARED_LIBS=OFF because the CI workers have OpenCL.dll
        #      in System32 which takes preference over our version.
        # XXX: ENABLE_LOADABLE_DRIVERS=OFF because PoCL doesn't know how to
        #      find drivers when built with BUILD_SHARED_LIBS=OFF

      - name: Build PoCL
        run: |
          cmake --build ${{ env.WORKSPACE }}/build-pocl

      - name: Run Tests
        env:
          POCL_CACHE_DIR: "${{ runner.temp }}/GH_POCL_CACHE"
        timeout-minutes: 120
        run: |
          rm -rf ${{ env.POCL_CACHE_DIR }}
          mkdir -p ${{ env.POCL_CACHE_DIR }}
          cd ${{ env.WORKSPACE }}/build-pocl
          export PATH=${{ env.WORKSPACE }}/install-llvm/bin:$PATH
          ${{ env.WORKSPACE }}/tools/scripts/run_cpu_tests mingw $CTEST_FLAGS -j$(nproc)