Cross-OS native compilation is not supported.

[akoc95]

Description

It's a new project. No any changes.
Once I switch < PublishAot >true< /PublishAot > error below.

Severity Code Description Project File Line Suppression State
Error (active) Cross-OS native compilation is not supported. MauiTestAot(net8.0-android) .nuget\packages\microsoft.dotnet.ilcompiler\8.0.7\build\Microsoft.NETCore.Native.Publish.targets 60

net8.0-android;

<OutputType>Exe</OutputType>
<RootNamespace>MauiApp1</RootNamespace>
<UseMaui>true</UseMaui>
<SingleProject>true</SingleProject>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<RuntimeIdentifier>android-arm64</RuntimeIdentifier>
<PublishAot>true</PublishAot>
<!-- Display name -->
<ApplicationTitle>MauiApp1</ApplicationTitle>

<!-- App Identifier -->
<ApplicationId>com.companyname.mauiapp1</ApplicationId>

<!-- Versions -->
<ApplicationDisplayVersion>1.0</ApplicationDisplayVersion>
<ApplicationVersion>1</ApplicationVersion>

<SupportedOSPlatformVersion Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == 'android'">28.0</SupportedOSPlatformVersion>

Steps to Reproduce

No response

Link to public reproduction project repository

No response

Version with bug

8.0.61 SR6.1

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

No response

Did you find any workaround?

No

Relevant log output

No response

<ItemGroup>
  <_ResolvedCopyLocalPublishAssets Remove="@(_AssembliesToSkipPublish)" />
  <_ResolvedCopyLocalPublishAssets Include="@(_LinkedResolvedAssemblies)" />
</ItemGroup>

<ItemGroup>
  <_NativeIntermediateAssembly Include="@(IntermediateAssembly->'$(NativeOutputPath)%(Filename)$(NativeBinaryExt)')" />
  <IntermediateAssembly Remove="@(IntermediateAssembly)" />
  <IntermediateAssembly Include="@(_NativeIntermediateAssembly)" />
</ItemGroup>

<Warning Condition="Exists($(UserRuntimeConfig))" Text="The published project has a runtimeconfig.template.json that is not supported by PublishAot. Move the configuration to the project file using RuntimeHostConfigurationOption." />
<!-- Fail with descriptive error message for common mistake. -->
<Error Condition="$([MSBuild]::VersionLessThan('$(NETCoreSdkVersion)', '6.0.0'))" Text=".NET SDK 6+ is required for native compilation." />
<Error Condition="$([MSBuild]::VersionLessThan('$(TargetFrameworkVersion)', '6.0'))" Text="For native compilation, the project needs to target .NET 6 or higher." />
<Error Condition="'$(RuntimeIdentifier)' == ''"
  Text="RuntimeIdentifier is required for native compilation. Try running dotnet publish with the -r option value specified." />
<Error Condition="'$(GeneratePackageOnBuild)' == 'true'" Text="GeneratePackageOnBuild is not supported for native compilation." />
<Error Condition="'$(OutputType)' != 'Library' and '$(NativeLib)' != '' and '$(CustomNativeMain)' != 'true'" Text="NativeLib requires OutputType=Library." />
<Warning Condition="'$(NativeLib)' != '' and '$(EventSourceSupport)' == 'true' and '$(_SuppressNativeLibEventSourceWarning)' != 'true'" Text="EventSource is not supported or recommended when compiling to a native library. Please go to https://github.com/dotnet/runtime/issues/91762 for more details." />

<Error Condition="'$(PublishTrimmed)' == 'false'" Text="PublishTrimmed is implied by native compilation and cannot be disabled." />

<Error Condition="'$(PublishAot)' == 'true' and '$(PublishSingleFile)' == 'true'" Text="PublishAot and PublishSingleFile cannot be specified at the same time." />

<!-- Fail with descriptive error message for common unsupported cases. -->
<Error Condition="'$(DisableUnsupportedError)' != 'true' and '$(OS)' == 'Windows_NT' and '$(_targetOS)' != 'win'"
  Text="Cross-OS native compilation is not supported." />

<Error Condition="'$(DisableUnsupportedError)' != 'true' and '$(OS)' != 'Windows_NT' and '$(_targetOS)' == 'win'"
  Text="Cross-OS native compilation is not supported." />

<Error Condition="'$(DisableUnsupportedError)' != 'true' and '$(_targetArchitecture)' != 'x64' and '$(_targetArchitecture)' != 'arm64'"
  Text="Native compilation does not support targeting $(RuntimeIdentifier) yet." />

<Error Condition="'$(DisableUnsupportedError)' != 'true' and !('$(_hostArchitecture)' == 'x64' or '$(_hostArchitecture)' == 'arm64')"
  Text="Native compilation can run on x64 and arm64 hosts only." />

<Error Condition="'$(IlcHostPackagePath)' == '' and '$(RuntimePackagePath)' != '' and ('$(_hostArchitecture)' == 'x64' or '$(_hostArchitecture)' == 'arm64')"
  Text="Add a PackageReference for '$(_hostPackageName)' to allow cross-compilation for $(_targetArchitecture)" />

<!-- NativeAOT runtime pack assemblies need to be defined to avoid the default CoreCLR implementations being set as compiler inputs -->
<Error Condition="'@(PrivateSdkAssemblies)' == '' and '$(PublishAotUsingRuntimePack)' != 'true'" Text="The PrivateSdkAssemblies ItemGroup is required for _ComputeAssembliesToCompileToNative" />
<Error Condition="'@(FrameworkAssemblies)' == '' and '$(PublishAotUsingRuntimePack)' != 'true'" Text="The FrameworkAssemblies ItemGroup is required for _ComputeAssembliesToCompileToNative" />

<ComputeManagedAssembliesToCompileToNative
  Assemblies="@(_ResolvedCopyLocalPublishAssets)"
  DotNetAppHostExecutableName="$(_DotNetAppHostExecutableName)"
  DotNetHostFxrLibraryName="$(_DotNetHostFxrLibraryName)"
  DotNetHostPolicyLibraryName="$(_DotNetHostPolicyLibraryName)"
  SdkAssemblies="@(PrivateSdkAssemblies)"
  FrameworkAssemblies="@(FrameworkAssemblies)">

  <Output TaskParameter="ManagedAssemblies" ItemName="_ManagedResolvedAssembliesToPublish" />
  <Output TaskParameter="SatelliteAssemblies" ItemName="_SatelliteAssembliesToPublish" />
  <Output TaskParameter="AssembliesToSkipPublish" ItemName="_AssembliesToSkipPublish" />
</ComputeManagedAssembliesToCompileToNative>

<PropertyGroup>
  <_symbolExt Condition="'$(OS)' == 'Windows_NT'">$(NativeSymbolExt)</_symbolExt>
  <_symbolExt Condition="'$(OS)' != 'Windows_NT'">$(NativeBinaryExt)$(NativeSymbolExt)</_symbolExt>
  <_symbolSourcePath>$(NativeOutputPath)$(TargetName)$(_symbolExt)</_symbolSourcePath>
  <_symbolTargetPath>$(PublishDir)\$(TargetName)$(_symbolExt)</_symbolTargetPath>
  <!-- If the symbol is a dsym bundle, it's a folder not a file. -->
  <_symbolIsFile Condition="'$(NativeSymbolExt)' == '.dsym'">false</_symbolIsFile>
  <_symbolIsFile Condition="'$(_symbolIsFile)' == ''">true</_symbolIsFile>
</PropertyGroup>

<ItemGroup>
  <_symbolRecursivePath Include="$(NativeOutputPath)$(TargetName)$(_symbolExt)/**/*" />
</ItemGroup>

<!-- replace native symbol file if it exists. On Mac, the symbol path may be a folder-->
<Delete Files="$(_symbolTargetPath)" Condition="'$(_symbolIsFile)' == 'true' and Exists('$(_symbolTargetPath)')" />
<Copy SourceFiles="$(_symbolSourcePath)" DestinationFolder="$(PublishDir)"
  Condition="'$(_symbolIsFile)' == 'true' and Exists('$(_symbolSourcePath)')" />

<!-- Copy folder otherwise -->
<RemoveDir Directories="$(_symbolTargetPath)" Condition="'$(_symbolIsFile)' == 'false' and Exists('$(_symbolTargetPath)')" />
<Copy SourceFiles="@(_symbolRecursivePath)" DestinationFolder="$(_symbolTargetPath)/%(RecursiveDir)"
  Condition="'$(_symbolIsFile)' == 'false' and Exists('$(_symbolSourcePath)')" />

[github-actions]

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[RoiChen001]

I can repro this issue at Android platform on the latest 17.11.0 Preview 5.0 (8.0.61&8.0.70).

[jonathanpeppers]

NativeAOT is not yet supported for Android (such as .NET MAUI applications). Java interop is not implemented.

You can use linux-bionic-* RIDs, but you would be limited to plain .NET APIs, unable to call Android or Java APIs.

For tracking .NET MAUI / NativeAOT support you can follow these:

• Fix known issues with NativeAOT java-interop#1192
• Fix known issues with NativeAOT android#8724
• NativeAOT status for Android #106748

I will transfer this issue to dotnet/runtime, in case they want to comment about the error:

Cross-OS native compilation is not supported.

It seems like if NativeAOT were supported for Android, we'd want builds to work on Windows, Mac, & Linux.

[sudharsan-narayanan]

@jonathanpeppers For WinUI 3, the AOT support will works in latest SDK version?

[jonathanpeppers]

NativeAOT works on Windows and iOS right now.

"Mono AOT" works for Android, iOS, etc. if you haven't opted into NativeAOT.

[agocke]

It seems like if NativeAOT were supported for Android, we'd want builds to work on Windows, Mac, & Linux.

Assuming the necessary native bits are available for each of these platforms we'll make it work. I don't know offhand whether the Android native toolchain is installable on, say, Mac OS.