build: Last attempts to get 32-bit ARM working

Rely on the 22621 SDK for 32-bit ARM support on VS 2022.
Also modified the `setup.ps1` script to always fetch this SDK version.

lxmonika.props

@@ -17,6 +17,11 @@
     <MaTargetPlatformVersion Condition="'$(MaTargetPlatformVersion)' == ''">10.0.17134.0</MaTargetPlatformVersion>
   </PropertyGroup>
 
+  <PropertyGroup Label="Monika" Condition="'$(Platform)' == 'ARM' and '$(MaLatestTargetPlatformVersion)' > '10.0.22621.0'">
+    <!-- Last SDK/WDK version to support 32-bit ARM. -->
+    <MaLatestTargetPlatformVersion>10.0.22621.0</MaLatestTargetPlatformVersion>
+  </PropertyGroup>
+
   <PropertyGroup Label="WDK">
     <WDKContentRoot Condition="'$(WDKContentRoot)' == ''">$(MaWindowsKitsRoot)</WDKContentRoot>
     <WDKBuildFolder Condition="'$(WDKBuildFolder)' == ''">$(MaLatestTargetPlatformVersion)</WDKBuildFolder>

setup.ps1

@@ -24,21 +24,33 @@ curl.exe `
 Start-Process .\wdksetup_17134.exe -Wait -ArgumentList '/ceip off /features + /q'
 Remove-Item wdksetup_17134.exe
 
+curl.exe `
+    -SL https://download.microsoft.com/download/3/b/d/3bd97f81-3f5b-4922-b86d-dc5145cd6bfe/windowssdk/winsdksetup.exe `
+    -o sdksetup_22621.exe
+Start-Process .\sdksetup_22621.exe -Wait -ArgumentList '/ceip off /features + /q'
+Remove-Item sdksetup_22621.exe
+
+curl.exe `
+    -SL https://download.microsoft.com/download/7/b/f/7bfc8dbe-00cb-47de-b856-70e696ef4f46/wdk/wdksetup.exe `
+    -o wdksetup_22621.exe
+Start-Process .\wdksetup_22621.exe -Wait -ArgumentList '/ceip off /features + /q'
+Remove-Item wdksetup_22621.exe
+
 # Hacks to enable ARM32 builds
 
 $vsPath = (vswhere -property installationPath | Out-String).Trim();
 
-$arm64Path = (Join-Path $vsPath "\MSBuild\Microsoft\VC\v170\Platforms\ARM64");
-$armPath = (Join-Path $vsPath "\MSBuild\Microsoft\VC\v170\Platforms\ARM")
+$vcArm64Path = (Join-Path $vsPath "\MSBuild\Microsoft\VC\v170\Platforms\ARM64");
+$vcArmPath = (Join-Path $vsPath "\MSBuild\Microsoft\VC\v170\Platforms\ARM")
 
-if (Test-Path $arm64Path)
+if (Test-Path $vcArm64Path)
 {
-    Push-Location $arm64Path
-    foreach ($file in (Get-ChildItem -Recurse $arm64Path -File))
+    Push-Location $vcArm64Path
+    foreach ($file in (Get-ChildItem -Recurse $vcArm64Path -File))
     {
         $relativePath = Resolve-Path -Path $file.FullName -Relative
-        $armFilePath = Join-Path $armPath $relativePath
-        if (Test-Path (Join-Path $armPath $relativePath))
+        $armFilePath = Join-Path $vcArmPath $relativePath
+        if (Test-Path (Join-Path $vcArmPath $relativePath))
         {
             continue;
         }
@@ -47,3 +59,41 @@ if (Test-Path $arm64Path)
     }
     Pop-Location
 }
+
+$kitPath = (Get-ItemPropertyValue `
+    "Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Kits\Installed Roots" `
+    -Name KitsRoot10 | `
+    Out-String).Trim();
+
+foreach ($sdkDir in (Get-ChildItem (Join-Path $kitPath "build") -Directory -Filter "10.0.*"))
+{
+    $sdkPath = $sdkDir.FullName
+
+    $sdkArm64Path = (Join-Path $sdkPath "ARM64")
+    $sdkArmPath = (Join-Path $sdkPath "ARM")
+
+    if ((Test-Path $sdkArmPath) -or !(Test-Path $sdkArm64Path))
+    {
+        continue;
+    }
+
+    Push-Location $sdkArm64Path
+    foreach ($file in (Get-ChildItem -Recurse $sdkArm64Path -File))
+    {
+        $relativeArm64Path = Resolve-Path -Path $file.FullName -Relative
+        $relativeArmPath = $relativeArm64Path.Replace("arm64", "arm").Replace("Arm64", "Arm");
+        $fileArmPath = (Join-Path $sdkArmPath $relativeArmPath)
+        if (Test-Path $fileArmPath)
+        {
+            continue;
+        }
+        New-Item -ItemType File -Path $fileArmPath -Force
+        $fileContent = (Get-Content $relativeArm64Path | Out-String).Replace( `
+            "arm64", "arm" `
+        ).Replace( `
+            "Arm64", "Arm" `
+        )
+        Set-Content $fileArmPath -Value $fileContent
+    }
+    Pop-Location
+}