GH runner macos: Add cross-compilation to x86_64 based on the Cirrus CI job

.github/workflows/apple_m.yml

@@ -10,7 +10,7 @@ permissions:
   contents: read # to fetch code (actions/checkout)
 
 jobs:
-  build:
+  build-windows:
     if: "github.repository == 'OpenMathLib/OpenBLAS'"
     runs-on: macos-14
 
@@ -155,3 +155,145 @@ jobs:
               exit 1
               ;;
           esac
+
+  xbuild-x86_64:
+    if: "github.repository == 'OpenMathLib/OpenBLAS'"
+    runs-on: macos-26
+
+    strategy:
+      fail-fast: false
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Print system information
+        run: |
+          if [ "$RUNNER_OS" == "macOS" ]; then
+            sysctl -a | grep machdep.cpu
+          else
+            echo "::error::$RUNNER_OS not supported"
+            exit 1
+          fi
+
+      - name: Install Dependencies
+        run: |
+          if [ "$RUNNER_OS" == "Linux" ]; then
+            sudo apt-get install -y gfortran cmake ccache libtinfo5
+          elif [ "$RUNNER_OS" == "macOS" ]; then
+            # It looks like "gfortran" isn't working correctly unless "gcc" is re-installed.
+            brew reinstall gcc
+            brew install coreutils ccache
+            brew install llvm
+          else
+            echo "::error::$RUNNER_OS not supported"
+            exit 1
+          fi
+
+      - name: Crossbuild OpenBLAS to x86_64
+        run: |
+          #export PATH=/opt/homebrew/opt/llvm/bin:$PATH
+          #export LDFLAGS="-L/opt/homebrew/opt/llvm/lib"
+          #export CPPFLAGS="-I/opt/homebrew/opt/llvm/include" 
+          export ARCHS="i386 x86_64"
+          export ARCHS_STANDARD="i386 x86_64"
+          export ARCHS_STANDARD_32_64_BIT="i386 x86_64"
+          export ARCHS_STANDARD_64_BIT=x86_64
+          export ARCHS_STANDARD_INCLUDING_64_BIT="i386 x86_64"
+          export ARCHS_UNIVERSAL_IPHONE_OS="i386 x86_64"
+          export VALID_ARCHS="i386 x86_64"
+          xcrun --sdk macosx --show-sdk-path
+          xcodebuild -version
+          export CC=/Applications/Xcode_26.0.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
+          export CFLAGS="-O2 -unwindlib=none -Wno-macro-redefined -isysroot /Applications/Xcode_26.0.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX26.0.sdk -arch x86_64"
+          make TARGET=CORE2 DYNAMIC_ARCH=1 NUM_THREADS=32 HOSTCC=clang NOFORTRAN=1 RANLIB="ls -l"
+
+  xbuild-ios:
+    if: "github.repository == 'OpenMathLib/OpenBLAS'"
+    runs-on: macos-26
+
+    strategy:
+      fail-fast: false
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Print system information
+        run: |
+          if [ "$RUNNER_OS" == "macOS" ]; then
+            sysctl -a | grep machdep.cpu
+          else
+            echo "::error::$RUNNER_OS not supported"
+            exit 1
+          fi
+
+      - name: Install Dependencies
+        run: |
+          if [ "$RUNNER_OS" == "Linux" ]; then
+            sudo apt-get install -y gfortran cmake ccache libtinfo5
+          elif [ "$RUNNER_OS" == "macOS" ]; then
+            # It looks like "gfortran" isn't working correctly unless "gcc" is re-installed.
+            brew reinstall gcc
+            brew install coreutils ccache
+            brew install llvm
+          else
+            echo "::error::$RUNNER_OS not supported"
+            exit 1
+          fi
+
+      - name: Crossbuild to iOS
+        run: |
+          #brew install llvm
+          #export #PATH=/opt/homebrew/opt/llvm/bin:$PATH
+          # export #LDFLAGS="-L/opt/homebrew/opt/llvm/lib"
+          export #CPPFLAGS="-I/opt/homebrew/opt/llvm/include" 
+          export CC=/Applications/Xcode_26.0.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
+          export CFLAGS="-O2 -unwindlib=none -Wno-macro-redefined -isysroot /Applications/Xcode_26.0.1.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS26.0.sdk -arch arm64 -miphoneos-version-min=10.0"
+          xcrun --sdk iphoneos --show-sdk-path
+          ls -l /Applications
+          make TARGET=ARMV8 NUM_THREADS=32 HOSTCC=clang NOFORTRAN=1 CROSS=1
+
+  xbuild-ios32:
+    if: "github.repository == 'OpenMathLib/OpenBLAS'"
+    runs-on: macos-26
+
+    strategy:
+      fail-fast: false
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Print system information
+        run: |
+          if [ "$RUNNER_OS" == "macOS" ]; then
+            sysctl -a | grep machdep.cpu
+          else
+            echo "::error::$RUNNER_OS not supported"
+            exit 1
+          fi
+
+      - name: Install Dependencies
+        run: |
+          if [ "$RUNNER_OS" == "Linux" ]; then
+            sudo apt-get install -y gfortran cmake ccache libtinfo5
+          elif [ "$RUNNER_OS" == "macOS" ]; then
+            # It looks like "gfortran" isn't working correctly unless "gcc" is re-installed.
+            brew reinstall gcc
+            brew install coreutils ccache
+            brew install llvm
+            brew install --cask android-ndk
+          else
+            echo "::error::$RUNNER_OS not supported"
+            exit 1
+          fi
+
+      - name: AppleM1/LLVM armv7-androidndk xbuild
+        run: |
+          export ANDROID_NDK_HOME="/opt/homebrew/share/android-ndk"
+          export CC=/opt/homebrew/share/android-ndk/toolchains/llvm/prebuilt/darwin-x86_64/bin/armv7a-linux-androideabi23-clang
+          export AR=/opt/homebrew/share/android-ndk/toolchains/llvm/prebuilt/darwin-x86_64/bin/llvm-ar
+          export RANLIB=/opt/homebrew/share/android-ndk/toolchains/llvm/prebuilt/darwin-x86_64/bin/llvm-ranlib
+          make TARGET=ARMV7 ARM_SOFTFP_ABI=1 NUM_THREADS=32 HOSTCC=clang NOFORTRAN=1
+