Microsoft.Android.Sdk.NativeAOT.targets

<!--
***********************************************************************************************
Microsoft.Android.Sdk.NativeAOT.targets

This file contains the NativeAOT-specific MSBuild logic for .NET for Android.
***********************************************************************************************
-->
<Project>

  <UsingTask TaskName="Xamarin.Android.Tasks.SetNdkPathForIlc" AssemblyFile="$(_XamarinAndroidBuildTasksAssembly)" />

  <!-- Default property values for NativeAOT -->
  <PropertyGroup>
    <_AndroidRuntimePackRuntime>NativeAOT</_AndroidRuntimePackRuntime>
    <_AndroidCodeGenerationTarget Condition=" '$(_AndroidCodeGenerationTarget)' == '' ">JavaInterop1</_AndroidCodeGenerationTarget>
    <!-- NativeAOT's targets currently gives an error about cross-compilation -->
    <DisableUnsupportedError Condition=" $([MSBuild]::IsOSPlatform('windows')) and '$(DisableUnsupportedError)' == '' ">true</DisableUnsupportedError>
  </PropertyGroup>

  <!-- Make IlcCompile depend on the trimmer -->
  <PropertyGroup>
    <IlcCompileDependsOn>
      _AndroidBeforeIlcCompile;
      SetupOSSpecificProps;
      PrepareForILLink;
      ILLink;
      ComputeIlcCompileInputs;
      _AndroidComputeIlcCompileInputs;
      $(IlcCompileDependsOn)
    </IlcCompileDependsOn>
  </PropertyGroup>

  <Target Name="_AndroidBeforeIlcCompile"
      DependsOnTargets="_PrepareLinking"
      BeforeTargets="SetupProperties">
    <!-- Example settings from: https://github.com/jonathanpeppers/Android-NativeAOT/blob/ea69d122cdc7de67aa6a5db14b7e560763c63cdd/DotNet/libdotnet.targets -->
    <PropertyGroup>
      <_NdkAbi Condition=" '$(RuntimeIdentifier)' == 'android-arm64' ">aarch64</_NdkAbi>
      <_NdkAbi Condition=" '$(RuntimeIdentifier)' == 'android-x64' ">x86_64</_NdkAbi>
      <_NdkSysrootAbi>$(_NdkAbi)-linux-android</_NdkSysrootAbi>
      <_NdkPrebuiltAbi Condition=" $([MSBuild]::IsOSPlatform('windows')) ">windows-x86_64</_NdkPrebuiltAbi>
      <_NdkPrebuiltAbi Condition=" $([MSBuild]::IsOSPlatform('osx')) ">darwin-x86_64</_NdkPrebuiltAbi>
      <_NdkPrebuiltAbi Condition=" $([MSBuild]::IsOSPlatform('linux')) ">linux-x86_64</_NdkPrebuiltAbi>
      <_NdkSysrootDir>$(_AndroidNdkDirectory)toolchains/llvm/prebuilt/$(_NdkPrebuiltAbi)/sysroot/usr/lib/$(_NdkSysrootAbi)/</_NdkSysrootDir>
      <_NdkBinDir>$(_AndroidNdkDirectory)toolchains/llvm/prebuilt/$(_NdkPrebuiltAbi)/bin/</_NdkBinDir>
      <CppCompilerAndLinker>clang++</CppCompilerAndLinker>
      <ObjCopyName>llvm-objcopy</ObjCopyName>

      <!-- Example settings from: https://github.com/xamarin/xamarin-macios/blob/c43d4ea40bc777969e3b158cf46446df292d8449/dotnet/targets/Xamarin.Shared.Sdk.targets#L541-L550 -->
      <RunILLink>true</RunILLink>
      <!--
        We want to suppress warnings from trimmer and only show warnings from ILC.
        Otherwise, you would get 2x for every warning.
      -->
      <_OriginalSuppressTrimAnalysisWarnings>$(SuppressTrimAnalysisWarnings)</_OriginalSuppressTrimAnalysisWarnings>
      <SuppressTrimAnalysisWarnings>true</SuppressTrimAnalysisWarnings>
      <!-- Ensure ILLink respects the value of SuppressTrimAnalysisWarnings -->
      <_ExtraTrimmerArgs>$(_ExtraTrimmerArgs) --notrimwarn</_ExtraTrimmerArgs>

      <!-- The list of hacks below should go away when we have NativeAOT.android-* packs -->
      <!-- HACK: we are android-arm64, so this is required for the right path(s) to be found -->
      <_OriginalRuntimeIdentifier>$(RuntimeIdentifier)</_OriginalRuntimeIdentifier>
      <RuntimeIdentifier Condition=" '$(RuntimeIdentifier)' == 'android-arm64' ">linux-bionic-arm64</RuntimeIdentifier>
      <RuntimeIdentifier Condition=" '$(RuntimeIdentifier)' == 'android-x64' ">linux-bionic-x64</RuntimeIdentifier>
      <!-- HACK: -targetos:android results in error, so use linux -->
      <_targetOS>linux</_targetOS>
      <!-- HACK: prevents libSystem.Net.Security.Native.a from being added -->
      <_linuxLibcFlavor>bionic</_linuxLibcFlavor>
      <!-- HACK: prevents: java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "__start___modules" -->
      <LinkerFlavor Condition=" '$(LinkerFlavor)' == '' ">lld</LinkerFlavor>
    </PropertyGroup>

    <SetNdkPathForIlc NdkBinDirectory="$(_NdkBinDir)" />
  </Target>

  <Target Name="_AndroidComputeIlcCompileInputs">
    <PropertyGroup>
      <!-- Turn trimmer warnings back to original value -->
      <SuppressTrimAnalysisWarnings>$(_OriginalSuppressTrimAnalysisWarnings)</SuppressTrimAnalysisWarnings>
    </PropertyGroup>
    <ItemGroup>
      <!-- Android needs a proper soname property or it will refuse to load the library -->
      <LinkerArg Include="-Wl,-soname,lib$(TargetName)$(NativeBinaryExt)" />
      <!-- Give ILLink's output to ILC -->
      <IlcCompileInput Remove="@(IlcCompileInput)" />
      <IlcCompileInput Include="$(IntermediateLinkDir)$(TargetName)$(TargetExt)" />
      <_AndroidILLinkAssemblies Include="@(ManagedAssemblyToLink->'$(IntermediateLinkDir)%(Filename)%(Extension)')" Condition="Exists('$(IntermediateLinkDir)%(Filename)%(Extension)')" />
      <IlcReference Remove="@(IlcReference)" />
      <IlcReference Include="@(PrivateSdkAssemblies)" />
      <IlcReference Include="@(_AndroidILLinkAssemblies)" />
      <!-- Root *everything* for ILC, as it's already trimmed -->
      <TrimmerRootAssembly Include="@(_AndroidILLinkAssemblies->'%(Filename)')" Exclude="System.Private.CoreLib" TrimMode="All" />
      <!-- Passes linked assemblies to outer MSBuild tasks/targets -->
      <ResolvedFileToPublish Include="@(IlcCompileInput);@(_AndroidILLinkAssemblies)" RuntimeIdentifier="$(_OriginalRuntimeIdentifier)" />
      <!-- Include libc++ -->
      <ResolvedFileToPublish Include="$(_NdkSysrootDir)libc++_shared.so" RuntimeIdentifier="$(_OriginalRuntimeIdentifier)" />
    </ItemGroup>
  </Target>

  <Target Name="_AndroidAfterLinkNative" AfterTargets="LinkNative">
    <PropertyGroup>
      <!-- Turn $(RuntimeIdentifier) back to original value -->
      <RuntimeIdentifier>$(_OriginalRuntimeIdentifier)</RuntimeIdentifier>
    </PropertyGroup>
  </Target>

  <Target Name="_AndroidFixNativeLibraryFileName" AfterTargets="ComputeFilesToPublish">
    <ItemGroup>
      <!-- Fix paths to contain lib-prefix -->
      <ResolvedFileToPublish Update="@(ResolvedFileToPublish)" ArchiveFileName="lib%(FileName)%(Extension)" Condition=" '%(Filename)%(Extension)' == '$(TargetName)$(NativeBinaryExt)' " />
    </ItemGroup>
  </Target>

</Project>