windows_arm64.yml

name: Windows ARM64 CI

on:
  push:
    branches:
      - develop
    paths-ignore:
      - 'docs/**'
      - '**/*.md'
  pull_request:
    branches:
      - develop
    paths-ignore:
      - 'docs/**'
      - '**/*.md'

concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

permissions:
  contents: read # to fetch code (actions/checkout)

jobs:
  build:
    if: "github.repository == 'OpenMathLib/OpenBLAS'"
    runs-on: windows-11-arm
    steps:
      - name: Checkout repository
        uses: actions/checkout@v6

      # The runner's preinstalled LLVM archive has no flang; the official installer does
      - name: Install LLVM with flang
        shell: pwsh
        run: |
          $version = '22.1.8'
          Invoke-WebRequest "https://github.com/llvm/llvm-project/releases/download/llvmorg-$version/LLVM-$version-woa64.exe" -OutFile LLVM-woa64.exe
          $proc = Start-Process -FilePath .\LLVM-woa64.exe -ArgumentList '/S', '/D=C:\LLVM' -Wait -PassThru
          if ($proc.ExitCode) { throw "LLVM installer failed with exit code $($proc.ExitCode)" }

      - name: Set up Visual Studio environment
        shell: pwsh
        run: |
          $vsPath = & "${env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vswhere.exe" -latest -products * `
            -requires Microsoft.VisualStudio.Component.VC.Tools.ARM64 -property installationPath
          if (-not $vsPath) { throw "No Visual Studio installation with ARM64 C++ tools found" }

          $before = @{}
          Get-ChildItem env: | ForEach-Object { $before[$_.Name] = $_.Value }
          & "$vsPath\Common7\Tools\Launch-VsDevShell.ps1" -Arch arm64 -HostArch arm64 -SkipAutomaticLocation
          # VS ships its own LLVM (with an incomplete flang); ours must come first
          $llvmBin = 'C:\LLVM\bin'
          foreach ($tool in 'clang-cl.exe', 'flang.exe') {
            if (-not (Test-Path "$llvmBin\$tool")) { throw "$tool not found in $llvmBin" }
          }
          $env:PATH = "$llvmBin;$env:PATH"

          Get-ChildItem env: | Where-Object { $before[$_.Name] -cne $_.Value } |
            ForEach-Object { "$($_.Name)=$($_.Value)" } >> $env:GITHUB_ENV

      - name: Configure OpenBLAS
        shell: pwsh
        run: |
          cmake -S . -B build -G Ninja `
            -DCMAKE_BUILD_TYPE=Release `
            -DTARGET=ARMV8 `
            -DBINARY=64 `
            -DCMAKE_C_COMPILER=C:/LLVM/bin/clang-cl.exe `
            -DCMAKE_Fortran_COMPILER=C:/LLVM/bin/flang.exe `
            -DBUILD_SHARED_LIBS=ON `
            -DCMAKE_SYSTEM_PROCESSOR=arm64 `
            -DCMAKE_SYSTEM_NAME=Windows `
            -DCMAKE_INSTALL_PREFIX=C:/opt

      - name: Build OpenBLAS
        shell: pwsh
        run: cmake --build build -j16

      - name: Install OpenBLAS
        shell: pwsh
        run: cmake --install build

      - name: Run ctests
        shell: pwsh
        run: |
          $env:PATH = "C:\opt\bin;$env:PATH"
          cd build
          ctest