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[NativeAOT] MSBuild-related logic to get projects to build
This is an initial step to get the NativeAOT build working the same as
iOS does. At a high level, the changes are:
* Run `ILLink` with our existing trimmer/linker pipeline.
* Temporarily change our RID to `linux-bionic-arm64`.
* Pass the output to `ILC`, the NativeAOT compiler.
* Turn the RID back to `android-arm64`.
A list of MSBuild/workload changes required so far:
* `$(UseMonoRuntime)` is false when `$(PublishAot)` is true
* Set `$(_IsPublishing)` as NativeAOT expects `dotnet publish` to be
the only way NativeAOT is used. Setting this in our targets allows
the proper `*.NativeAOT.*` packs to restore inside of a `dotnet
build`.
* `$(SelfContained)=true`, seems to be required for the
`linux-bionic-arm64` runtime packs to restore. All Android apps are
self-contained, so this might be fine.
* Create a new `Microsoft.Android.Sdk.NativeAOT.targets` file that
uses `$(_AndroidNdkDirectory)` to set various properties for
NativeAOT's build (ILC).
* `HACK:` set `$(_targetOS)` to `linux` to make the NativeAOT build
attempt to run. `--targetos:android` results in a build error that
says Android is not supported.
* Disable `$(RunAOTCompilation)`, Mono's AOT compiler and the
`<RemoveRegisterAttribute/>` MSBuild task.
* Disable `$(AndroidEnableMarshalMethods)` to be re-enabled in a
future PR.
A list of blockers or things that don't work yet:
* NativeAOT apps won't launch yet (future changes for that)
* The NativeAOT cross compiler doesn't run on Windows:
Microsoft.NETCore.Native.Publish.targets(61,5): Cross-OS native compilation is not supported.
Microsoft.NETCore.Native.Unix.targets(296,5): error : Platform linker ('C:\Android\android-sdk\ndk\26.3.11579264\toolchains/llvm/prebuilt/windows-x86_64/bin/aarch64-linux-android21-clang++' or 'gcc') not found in PATH. Ensure you have all the required prerequisites documented at https://aka.ms/nativeaot-prerequisites.
* You can only target `-r android-arm64` as there are no other
`linux-bionic-*` runtime packs yet.
* `-p:PublishAotUsingRuntimePack=true` is currently required, but I
will investigate if we should just set this by default.- Loading branch information
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...Android.Build.Tasks/Microsoft.Android.Sdk/targets/Microsoft.Android.Sdk.NativeAOT.targets
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| <!-- | ||
| *********************************************************************************************** | ||
| Microsoft.Android.Sdk.NativeAOT.targets | ||
| This file contains the NativeAOT-specific MSBuild logic for .NET for Android. | ||
| *********************************************************************************************** | ||
| --> | ||
| <Project> | ||
|
|
||
| <!-- Make IlcCompile depend on the trimmer --> | ||
| <PropertyGroup> | ||
| <IlcCompileDependsOn> | ||
| _AndroidBeforeIlcCompile; | ||
| SetupOSSpecificProps; | ||
| PrepareForILLink; | ||
| ILLink; | ||
| ComputeIlcCompileInputs; | ||
| _AndroidComputeIlcCompileInputs; | ||
| $(IlcCompileDependsOn) | ||
| </IlcCompileDependsOn> | ||
| </PropertyGroup> | ||
|
|
||
| <Target Name="_AndroidBeforeIlcCompile" BeforeTargets="SetupProperties"> | ||
| <!-- Example settings from: https://github.com/jonathanpeppers/Android-NativeAOT/blob/ea69d122cdc7de67aa6a5db14b7e560763c63cdd/DotNet/libdotnet.targets --> | ||
| <PropertyGroup> | ||
| <_NdkSysrootAbi>aarch64-linux-android</_NdkSysrootAbi> | ||
| <_NdkClangPrefix>aarch64-linux-android21-</_NdkClangPrefix> | ||
| <_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>$(_NdkBinDir)$(_NdkClangPrefix)clang++</CppCompilerAndLinker> | ||
| <CppLinker>$(CppCompilerAndLinker)</CppLinker> | ||
| <ObjCopyName>$(_NdkBinDir)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>$(SuppressTrimAnalysisWarnings)</_OriginalSuppressTrimAnalysisWarnings> | ||
| <SuppressTrimAnalysisWarnings>true</SuppressTrimAnalysisWarnings> | ||
|
|
||
| <!-- The list of hacks below should go away when we have NativeAOT.android-* packs --> | ||
| <!-- HACK: we are android-arm64, so this is required for the right path(s) to be found --> | ||
| <_OriginalRuntimeIdentifier>$(RuntimeIdentifier)</_OriginalRuntimeIdentifier> | ||
| <RuntimeIdentifier Condition=" '$(RuntimeIdentifier)' == 'android-arm64' ">linux-bionic-arm64</RuntimeIdentifier> | ||
| <!-- HACK: -targetos:android results in error, so use linux --> | ||
| <_targetOS>linux</_targetOS> | ||
| <!-- HACK: prevents libSystem.Net.Security.Native.a from being added --> | ||
| <_linuxLibcFlavor>bionic</_linuxLibcFlavor> | ||
| </PropertyGroup> | ||
| </Target> | ||
|
|
||
| <Target Name="_AndroidComputeIlcCompileInputs"> | ||
| <PropertyGroup> | ||
| <!-- Turn trimmer warnings back to original value --> | ||
| <SuppressTrimAnalysisWarnings>$(_OriginalSuppressTrimAnalysisWarnings)</SuppressTrimAnalysisWarnings> | ||
| </PropertyGroup> | ||
| <ItemGroup> | ||
| <!-- Give ILLink's output to ILC --> | ||
| <IlcCompileInput Remove="@(IlcCompileInput)" /> | ||
| <IlcCompileInput Include="$(IntermediateLinkDir)$(TargetName)$(TargetExt)" /> | ||
| <IlcReference Remove="@(IlcReference)" /> | ||
| <IlcReference Include="@(PrivateSdkAssemblies)" /> | ||
| <IlcReference Include="@(ManagedAssemblyToLink->'$(IntermediateLinkDir)%(Filename)%(Extension)')" Condition="Exists('$(IntermediateLinkDir)%(Filename)%(Extension)')" Exclude="@(IlcCompileInput)" /> | ||
| </ItemGroup> | ||
| </Target> | ||
|
|
||
| <Target Name="_AndroidAfterLinkNative" AfterTargets="LinkNative"> | ||
| <PropertyGroup> | ||
| <!-- Turn $(RuntimeIdentifier) back to original value --> | ||
| <RuntimeIdentifier>$(_OriginalRuntimeIdentifier)</RuntimeIdentifier> | ||
| </PropertyGroup> | ||
| </Target> | ||
|
|
||
| </Project> |
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