CI: Add win-arm64 support

.github/windows_arm64_steps/action.yml

@@ -0,0 +1,21 @@
+name: Build Dependencies(Win-ARM64)
+description: "Setup LLVM for Win-ARM64 builds"
+
+runs:
+  using: "composite"
+  steps:
+    - name: Install LLVM with checksum verification
+      shell: pwsh
+      run: |
+        Invoke-WebRequest https://github.com/llvm/llvm-project/releases/download/llvmorg-20.1.6/LLVM-20.1.6-woa64.exe -UseBasicParsing -OutFile LLVM-woa64.exe
+        $expectedHash = "92f69a1134e32e54b07d51c6e24d9594852f6476f32c3d70471ae00fffc2d462"
+        $fileHash = (Get-FileHash -Path "LLVM-woa64.exe" -Algorithm SHA256).Hash
+        if ($fileHash -ne $expectedHash) {
+            Write-Error "Checksum verification failed. The downloaded file may be corrupted or tampered with."
+            exit 1
+        }
+        Start-Process -FilePath ".\LLVM-woa64.exe" -ArgumentList "/S" -Wait
+        echo "C:\Program Files\LLVM\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+        echo "CC=clang-cl" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+        echo "CXX=clang-cl" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
+        echo "FC=flang-new" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append

.github/workflows/build-wheels.yml

@@ -19,23 +19,26 @@ jobs:
       fail-fast: false
       matrix:
         python: [cp310, cp311, cp312, cp313]
-        os: [ubuntu-latest, windows-latest, macos-13, macos-latest]
+        os: [ubuntu-latest, windows-latest, macos-13, macos-latest, windows-11-arm]
         python_impl: [Python]
         include:
           - python: cp312
             os: ubuntu-latest
             python_impl: Pyodide
+        exclude:
+          - os: windows-11-arm
+            python: cp310
     env:
       BUILD_COMMIT: "main"  # or a specific version, e.g., v0.13.1
       CIBW_BUILD: ${{ matrix.python }}-*
       CIBW_ARCHS_LINUX: "x86_64 aarch64"
       # No support for pypy, musl, Win32 for 3.10+
       # Skip musl for 3.8 and 3.9 since no upstream wheels
-      CIBW_SKIP: "pp* *-win32 cp38-musllinux* cp39-musllinux* *musllinux_aarch64*"
+      CIBW_SKIP: "pp* *-win32 *musllinux_aarch64*"
       CIBW_TEST_REQUIRES: pytest pytest-xdist
       CIBW_TEST_COMMAND: python -c "import statsmodels; statsmodels.test(['--skip-examples','--skip-slow','-n','2'], exit=True)"
       # Avoid testing on emulated architectures and Pyodide
-      CIBW_TEST_SKIP: "*-*linux_{aarch64,ppc64le,s390x} *pyodide*"
+      CIBW_TEST_SKIP: "*-*linux_{aarch64,ppc64le,s390x} *pyodide* *win_arm64*"
       CIBW_REPAIR_WHEEL_COMMAND_LINUX: 'auditwheel repair --strip -w {dest_dir} {wheel}'
       CIBW_BUILD_VERBOSITY: 1
       MULTIBUILD_WHEELS_STAGING_ACCESS: ${{ secrets.MULTIBUILD_WHEELS_STAGING_ACCESS }}