8357079: Fix Windows AArch64 DevKit Creation

Reviewed-by: erikj, ihse

Author: Luigi96

make/devkit/createWindowsDevkit.sh

@@ -64,6 +64,30 @@ IS_WSL=`echo $UNAME_RELEASE | grep Microsoft`
 IS_MSYS=`echo $UNAME_OS | grep -i Msys`
 MSYS2_ARG_CONV_EXCL="*"          # make "cmd.exe /c" work for msys2
 CMD_EXE="cmd.exe /c"
+
+# Detect host architecture to determine devkit platform support
+# Note: The devkit always includes x86, x64, and aarch64 libraries and tools
+# The difference is in toolchain capabilities:
+# - On x64|AMD64 hosts: aarch64 tools are cross-compilation tools (Hostx64/arm64)
+# - On aarch64|ARMv8 hosts: aarch64 tools are native tools (Hostarm64/arm64)
+HOST_ARCH=`echo $PROCESSOR_IDENTIFIER`
+case $HOST_ARCH in
+    AMD64)
+        echo "Running on x64 host - generating devkit with native x86/x64 tools and cross-compiled aarch64 tools."
+        echo "For native aarch64 compilation tools, run this script on a Windows/aarch64 machine."
+        SUPPORTED_PLATFORMS="x86, x64 (native) and aarch64 (cross-compiled)"
+        ;;
+    ARMv8)
+        echo "Running on aarch64 host - generating devkit with native tools for all platforms (x86, x64, aarch64)."
+        SUPPORTED_PLATFORMS="x86, x64, and aarch64 (all native)"
+        ;;
+    *)
+        echo "Unknown host architecture: $HOST_ARCH"
+        echo "Proceeding with devkit generation - toolchain capabilities may vary."
+        SUPPORTED_PLATFORMS="x86, x64, and aarch64"
+        ;;
+esac
+
 if test "x$IS_CYGWIN" != "x"; then
     BUILD_ENV="cygwin"
 elif test "x$IS_MSYS" != "x"; then
@@ -139,6 +163,7 @@ DEVKIT_ROOT="${BUILD_DIR}/VS${VS_VERSION}-${VS_VERSION_SP}-devkit"
 DEVKIT_BUNDLE="${DEVKIT_ROOT}.tar.gz"
 
 echo "Creating devkit in $DEVKIT_ROOT"
+echo "Platform support: $SUPPORTED_PLATFORMS"
 
 MSVCR_DLL=${MSVC_CRT_DIR}/vcruntime${VS_DLL_VERSION}.dll
 VCRUNTIME_1_DLL=${MSVC_CRT_DIR}/vcruntime${VS_DLL_VERSION}_1.dll
@@ -156,7 +181,11 @@ REDIST_SUBDIR="VC/Redist/MSVC/$REDIST_VERSION"
 echo "Copying VC..."
 rm -rf $DEVKIT_ROOT/VC
 mkdir -p $DEVKIT_ROOT/VC/bin
-cp -r "$VS_INSTALL_DIR/${VC_SUBDIR}/bin/Hostx64/arm64" $DEVKIT_ROOT/VC/bin/
+if [ -d "$VS_INSTALL_DIR/${VC_SUBDIR}/bin/Hostarm64/arm64" ]; then
+    cp -r "$VS_INSTALL_DIR/${VC_SUBDIR}/bin/Hostarm64/arm64" $DEVKIT_ROOT/VC/bin/
+else
+    cp -r "$VS_INSTALL_DIR/${VC_SUBDIR}/bin/Hostx64/arm64" $DEVKIT_ROOT/VC/bin/
+fi
 cp -r "$VS_INSTALL_DIR/${VC_SUBDIR}/bin/Hostx64/x64" $DEVKIT_ROOT/VC/bin/
 cp -r "$VS_INSTALL_DIR/${VC_SUBDIR}/bin/Hostx86/x86" $DEVKIT_ROOT/VC/bin/
 mkdir -p $DEVKIT_ROOT/VC/lib