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[NativeAOT] Let SDK select ILCompiler version - #12356

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jonathanpeppers-allow-nativeaot-ilc-divergence
Aug 12, 2026
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[NativeAOT] Let SDK select ILCompiler version#12356
jonathanpeppers merged 1 commit into
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jonathanpeppers-allow-nativeaot-ilc-divergence

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@jonathanpeppers jonathanpeppers commented Aug 12, 2026

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Summary

The Android workload currently pins Microsoft.DotNet.ILCompiler to the runtime version used to build the workload. This couples NativeAOT compiler updates to Android workload rebuilds instead of allowing the installed .NET SDK to select its compiler pack.

Remove the ILCompiler version override. Android runtime-pack RID and version selection remain unchanged and can intentionally diverge from the SDK-selected compiler version.

  • Useful description of why the change is necessary.
  • Links to issues fixed: N/A
  • Unit tests: N/A; this removes a version-policy override without changing runtime-pack restore logic.

@jonathanpeppers
[NativeAOT] Let SDK select ILCompiler version
c3b9a4a 
Do not pin Microsoft.DotNet.ILCompiler to the runtime version used to build the Android workload. Let the installed .NET SDK select its compiler pack so SDK servicing does not require rebuilding the Android workload.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: d491dde7-1e63-4f1b-abaa-c8405b8adb89
Copilot AI lite review requested due to automatic review settings August 12, 2026 13:08
Copilot AI reviewed Aug 12, 2026
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Pull request overview

This PR removes the Android workload’s MSBuild override that forced Microsoft.DotNet.ILCompiler to use the workload build-time runtime version, allowing the installed .NET SDK to select the ILCompiler pack version instead. This decouples NativeAOT compiler updates from Android workload rebuilds while keeping Android runtime-pack RID/version selection behavior unchanged.

Changes:

  • Removed the KnownILCompilerPack metadata update that pinned Microsoft.DotNet.ILCompiler to $(MicrosoftNETCoreAppRefPackageVersion).
  • Kept existing NativeAOT runtime-pack selection logic intact (still setting LatestRuntimeFrameworkVersion for the NativeAOT-labeled Microsoft.NETCore.App runtime pack).

akoeplinger
akoeplinger reviewed Aug 12, 2026
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Comment thread ...in.Android.Build.Tasks/Microsoft.Android.Sdk/targets/Microsoft.Android.Sdk.NativeAOT.targets
<KnownRuntimePack Include="@(_AndroidNetCoreAppNativeAotKnownRuntimePack)">
<LatestRuntimeFrameworkVersion>$(MicrosoftNETCoreAppRefPackageVersion)</LatestRuntimeFrameworkVersion>
<RuntimePackRuntimeIdentifiers>%(RuntimePackRuntimeIdentifiers);android-arm</RuntimePackRuntimeIdentifiers>
</KnownRuntimePack>

@akoeplinger akoeplinger Aug 12, 2026

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this also seems like it might cause issues, KnownRuntimePack should have android-arm for nativeaot now

@akoeplinger akoeplinger Aug 12, 2026

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hm actually, looks like it's not in sdk yet...

@akoeplinger akoeplinger Aug 12, 2026

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dotnet/sdk#55750

@jonathanpeppers jonathanpeppers Aug 12, 2026

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filed follow-up: #12362

@jonathanpeppers jonathanpeppers mentioned this pull request Aug 12, 2026
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jonpryor added a commit to unoplatform/uno that referenced this pull request Aug 12, 2026
@jonpryor
chore: Update to .NET 11 Preview 7
446e5a9 
Context: dotnet/android#12356

Update version numbers accordingly.

To sanity-check locally, try:

	\cp build/ci/net11/_global.json global.json

	dotnet build -f net11.0-ios26.5 src/Uno.Foundation/Uno.Foundation.netcoremobile.csproj
	dotnet build -f net11.0 src/Uno.UI/Uno.UI.csproj
	dotnet publish -f net11.0-android src/SamplesApp/SamplesApp.Skia.netcoremobile/SamplesApp.Skia.netcoremobile.csproj -p:UnoTargetFrameworkOverride=net11.0-android -p:UNO_DISABLE_ANALYZERS_IN_SAMPLES=true -bl
	dotnet build -f net11.0-ios -c Release -p:UnoTargetFrameworkOverride=net11.0-ios -bl src/SamplesApp/SamplesApp.Skia.netcoremobile/SamplesApp.Skia.netcoremobile.csproj

	# Android+NativeAOT
	dotnet publish -f net11.0-android src/SamplesApp/SamplesApp/SamplesApp.csproj -r android-arm64 -p:UnoTargetFrameworkOverride=net11.0-android -p:ApplicationId=uno.platform.samplesapp.skia.nativeaot -p:SkiaPublishAot=true -p:SkiaSharpVersion=4.151.1 -bl

Note: Android+NativeAOT build fails by default, due to a bug in
.NET 11 Preview 7:

	% dotnet publish src/SamplesApp/SamplesApp/SamplesApp.csproj -r android-arm64 -f net11.0-android -p:UnoTargetFrameworkOverride=net11.0-android -p:ApplicationId=uno.platform.samplesapp.skia.nativeaot -p:SkiaPublishAot=true -p:SkiaSharpVersion=4.151.1 -bl
	    …/uno/src/SamplesApp/SamplesApp/SamplesApp.csproj : error NU1603: Warning As Error: SamplesApp depends on Microsoft.DotNet.ILCompiler (>= 11.0.0-preview.7.26378.119) but Microsoft.DotNet.ILCompiler 11.0.0-preview.7.26378.119 was not found. Microsoft.DotNet.ILCompiler 11.0.0-preview.7.26381.103 was resolved instead.
	    …/uno/src/SamplesApp/SamplesApp/SamplesApp.csproj : error NU1102:
	      Unable to find package Microsoft.NETCore.App.Runtime.NativeAOT.android-arm64 with version (= 11.0.0-preview.7.26378.119)
	        - Found 21 version(s) in NuGet official package source [ Nearest version: 11.0.0-preview.7.26381.103 ]
	        - Found 0 version(s) in Solution Packages
	        - Found 0 version(s) in …/dotnet-sdk-11.0.100-preview.7.26381.103/library-packs
	    …/uno/src/SamplesApp/SamplesApp/SamplesApp.csproj : error NU1102:
	      Unable to find package Microsoft.NETCore.App.Runtime.NativeAOT.android-x64 with version (= 11.0.0-preview.7.26378.119)
	        - Found 21 version(s) in NuGet official package source [ Nearest version: 11.0.0-preview.7.26381.103 ]
	        - Found 0 version(s) in Solution Packages
	        - Found 0 version(s) in …/dotnet-sdk-11.0.100-preview.7.26381.103/library-packs
	    …/uno/src/SamplesApp/SamplesApp/SamplesApp.csproj : error NU1102:
	      Unable to find package runtime.osx-arm64.Microsoft.DotNet.ILCompiler with version (= 11.0.0-preview.7.26378.119)
	        - Found 96 version(s) in NuGet official package source [ Nearest version: 11.0.0-preview.7.26381.103 ]
	        - Found 0 version(s) in Solution Packages
	        - Found 0 version(s) in …/dotnet-sdk-11.0.100-preview.7.26381.103/library-packs

Update `Uno.CrossTargetting.targets` to contain a workaround; this
should not be needed in the next .NET 11 release.
@jonathanpeppers jonathanpeppers added the ready-to-review This PR is ready to review/merge, I think any CI failures are just flaky (ignorable). label Aug 12, 2026
@jonathanpeppers

jonathanpeppers commented Aug 12, 2026

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@dalexsoto review

dalexsoto
dalexsoto approved these changes Aug 12, 2026
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ILCompiler version selection now follows the SDK while preserving Android runtime-pack behavior; the deferred RID modernization is out of scope.

@jonathanpeppers
jonathanpeppers merged commit 3744f6b into main Aug 12, 2026
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@jonathanpeppers
jonathanpeppers deleted the jonathanpeppers-allow-nativeaot-ilc-divergence branch August 12, 2026 17:32
jonpryor added a commit to unoplatform/uno that referenced this pull request Aug 12, 2026
@jonpryor
chore: Update to .NET 11 Preview 7
17c823f 
Context: #22745
Context: dotnet/android#12356

Update version numbers accordingly.

To sanity-check locally, try:

	\cp build/ci/net11/_global.json global.json

	dotnet build -f net11.0-ios26.5 src/Uno.Foundation/Uno.Foundation.netcoremobile.csproj
	dotnet build -f net11.0 src/Uno.UI/Uno.UI.csproj
	dotnet publish -f net11.0-android src/SamplesApp/SamplesApp.Skia.netcoremobile/SamplesApp.Skia.netcoremobile.csproj -p:UnoTargetFrameworkOverride=net11.0-android -p:UNO_DISABLE_ANALYZERS_IN_SAMPLES=true -bl
	dotnet build -f net11.0-ios -c Release -p:UnoTargetFrameworkOverride=net11.0-ios -bl src/SamplesApp/SamplesApp.Skia.netcoremobile/SamplesApp.Skia.netcoremobile.csproj

	# Android+NativeAOT
	dotnet publish -f net11.0-android src/SamplesApp/SamplesApp/SamplesApp.csproj -r android-arm64 -p:UnoTargetFrameworkOverride=net11.0-android -p:ApplicationId=uno.platform.samplesapp.skia.nativeaot -p:SkiaPublishAot=true -p:SkiaSharpVersion=4.151.1 -bl

Note: Android+NativeAOT build fails by default, due to a bug in
.NET 11 Preview 7:

	% dotnet publish src/SamplesApp/SamplesApp/SamplesApp.csproj -r android-arm64 -f net11.0-android -p:UnoTargetFrameworkOverride=net11.0-android -p:ApplicationId=uno.platform.samplesapp.skia.nativeaot -p:SkiaPublishAot=true -p:SkiaSharpVersion=4.151.1 -bl
	    …/uno/src/SamplesApp/SamplesApp/SamplesApp.csproj : error NU1603: Warning As Error: SamplesApp depends on Microsoft.DotNet.ILCompiler (>= 11.0.0-preview.7.26378.119) but Microsoft.DotNet.ILCompiler 11.0.0-preview.7.26378.119 was not found. Microsoft.DotNet.ILCompiler 11.0.0-preview.7.26381.103 was resolved instead.
	    …/uno/src/SamplesApp/SamplesApp/SamplesApp.csproj : error NU1102:
	      Unable to find package Microsoft.NETCore.App.Runtime.NativeAOT.android-arm64 with version (= 11.0.0-preview.7.26378.119)
	        - Found 21 version(s) in NuGet official package source [ Nearest version: 11.0.0-preview.7.26381.103 ]
	        - Found 0 version(s) in Solution Packages
	        - Found 0 version(s) in …/dotnet-sdk-11.0.100-preview.7.26381.103/library-packs
	    …/uno/src/SamplesApp/SamplesApp/SamplesApp.csproj : error NU1102:
	      Unable to find package Microsoft.NETCore.App.Runtime.NativeAOT.android-x64 with version (= 11.0.0-preview.7.26378.119)
	        - Found 21 version(s) in NuGet official package source [ Nearest version: 11.0.0-preview.7.26381.103 ]
	        - Found 0 version(s) in Solution Packages
	        - Found 0 version(s) in …/dotnet-sdk-11.0.100-preview.7.26381.103/library-packs
	    …/uno/src/SamplesApp/SamplesApp/SamplesApp.csproj : error NU1102:
	      Unable to find package runtime.osx-arm64.Microsoft.DotNet.ILCompiler with version (= 11.0.0-preview.7.26378.119)
	        - Found 96 version(s) in NuGet official package source [ Nearest version: 11.0.0-preview.7.26381.103 ]
	        - Found 0 version(s) in Solution Packages
	        - Found 0 version(s) in …/dotnet-sdk-11.0.100-preview.7.26381.103/library-packs

Update `Uno.CrossTargetting.targets` to contain a workaround; this
should not be needed in the next .NET 11 release.
jonpryor added a commit to unoplatform/uno that referenced this pull request Aug 13, 2026
@jonpryor
chore: Update to .NET 11 Preview 7
f42da04 
Context: #22745
Context: dotnet/android#12356

Update version numbers accordingly.

To sanity-check locally, try:

	\cp build/ci/net11/_global.json global.json

	dotnet build -f net11.0-ios26.5 src/Uno.Foundation/Uno.Foundation.netcoremobile.csproj
	dotnet build -f net11.0 src/Uno.UI/Uno.UI.csproj
	dotnet publish -f net11.0-android src/SamplesApp/SamplesApp.Skia.netcoremobile/SamplesApp.Skia.netcoremobile.csproj -p:UnoTargetFrameworkOverride=net11.0-android -p:UNO_DISABLE_ANALYZERS_IN_SAMPLES=true -bl
	dotnet build -f net11.0-ios -c Release -p:UnoTargetFrameworkOverride=net11.0-ios -bl src/SamplesApp/SamplesApp.Skia.netcoremobile/SamplesApp.Skia.netcoremobile.csproj

	# Android+NativeAOT
	dotnet publish -f net11.0-android src/SamplesApp/SamplesApp/SamplesApp.csproj -r android-arm64 -p:UnoTargetFrameworkOverride=net11.0-android -p:ApplicationId=uno.platform.samplesapp.skia.nativeaot -p:SkiaPublishAot=true -p:SkiaSharpVersion=4.151.1 -bl

Note: Android+NativeAOT build fails by default, due to a bug in
.NET 11 Preview 7:

	% dotnet publish src/SamplesApp/SamplesApp/SamplesApp.csproj -r android-arm64 -f net11.0-android -p:UnoTargetFrameworkOverride=net11.0-android -p:ApplicationId=uno.platform.samplesapp.skia.nativeaot -p:SkiaPublishAot=true -p:SkiaSharpVersion=4.151.1 -bl
	    …/uno/src/SamplesApp/SamplesApp/SamplesApp.csproj : error NU1603: Warning As Error: SamplesApp depends on Microsoft.DotNet.ILCompiler (>= 11.0.0-preview.7.26378.119) but Microsoft.DotNet.ILCompiler 11.0.0-preview.7.26378.119 was not found. Microsoft.DotNet.ILCompiler 11.0.0-preview.7.26381.103 was resolved instead.
	    …/uno/src/SamplesApp/SamplesApp/SamplesApp.csproj : error NU1102:
	      Unable to find package Microsoft.NETCore.App.Runtime.NativeAOT.android-arm64 with version (= 11.0.0-preview.7.26378.119)
	        - Found 21 version(s) in NuGet official package source [ Nearest version: 11.0.0-preview.7.26381.103 ]
	        - Found 0 version(s) in Solution Packages
	        - Found 0 version(s) in …/dotnet-sdk-11.0.100-preview.7.26381.103/library-packs
	    …/uno/src/SamplesApp/SamplesApp/SamplesApp.csproj : error NU1102:
	      Unable to find package Microsoft.NETCore.App.Runtime.NativeAOT.android-x64 with version (= 11.0.0-preview.7.26378.119)
	        - Found 21 version(s) in NuGet official package source [ Nearest version: 11.0.0-preview.7.26381.103 ]
	        - Found 0 version(s) in Solution Packages
	        - Found 0 version(s) in …/dotnet-sdk-11.0.100-preview.7.26381.103/library-packs
	    …/uno/src/SamplesApp/SamplesApp/SamplesApp.csproj : error NU1102:
	      Unable to find package runtime.osx-arm64.Microsoft.DotNet.ILCompiler with version (= 11.0.0-preview.7.26378.119)
	        - Found 96 version(s) in NuGet official package source [ Nearest version: 11.0.0-preview.7.26381.103 ]
	        - Found 0 version(s) in Solution Packages
	        - Found 0 version(s) in …/dotnet-sdk-11.0.100-preview.7.26381.103/library-packs

Update `Uno.CrossTargetting.targets` to contain a workaround; this
should not be needed in the next .NET 11 release.
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