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<!--
***********************************************************************************************
Microsoft.NET.ILLink.targets

WARNING:  DO NOT MODIFY this file unless you are knowledgeable about MSBuild and have
          created a backup copy.  Incorrect changes to this file will make it
          impossible to load or build your projects from the command-line or the IDE.

Copyright (c) .NET Foundation. All rights reserved.
***********************************************************************************************
-->
<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">

  <!-- These properties should be set even if PublishTrimmed != true, to allow SDK components to
       set PublishTrimmed in targets which are imported after these targets. -->
  <PropertyGroup>
    <IntermediateLinkDir Condition=" '$(IntermediateLinkDir)' == '' ">$(IntermediateOutputPath)linked\</IntermediateLinkDir>
    <IntermediateLinkDir Condition=" !HasTrailingSlash('$(IntermediateLinkDir)') ">$(IntermediateLinkDir)\</IntermediateLinkDir>
    <!-- Used to enable incremental build for the linker target. -->
    <_LinkSemaphore>$(IntermediateLinkDir)Link.semaphore</_LinkSemaphore>
  </PropertyGroup>

  <ItemGroup>
    <AssemblyAttribute Condition="'$(IsTrimmable)' == 'true'" Include="System.Reflection.AssemblyMetadata">
      <_Parameter1>IsTrimmable</_Parameter1>
      <_Parameter2>True</_Parameter2>
    </AssemblyAttribute>
  </ItemGroup>

  <!-- We disable features for trimmed apps here so that the feature
      switches can flow to the runtimeconfig.json. Features are disabled
      by default since they may require assemblies, types or members that
      could be removed by the linker, causing a trimmed app to crash. -->
  <PropertyGroup Condition="'$(PublishTrimmed)' == 'true' And
                            $([MSBuild]::VersionGreaterThanOrEquals($(_TargetFrameworkVersionWithoutV), '6.0'))">
    <StartupHookSupport Condition="'$(StartupHookSupport)' == ''">false</StartupHookSupport>
    <CustomResourceTypesSupport Condition="'$(CustomResourceTypesSupport)' == ''">false</CustomResourceTypesSupport>
    <EnableUnsafeBinaryFormatterInDesigntimeLicenseContextSerialization Condition="'$(EnableUnsafeBinaryFormatterInDesigntimeLicenseContextSerialization)' == ''">false</EnableUnsafeBinaryFormatterInDesigntimeLicenseContextSerialization>
    <EnableUnsafeBinaryFormatterSerialization Condition="'$(EnableUnsafeBinaryFormatterSerialization)' == ''">false</EnableUnsafeBinaryFormatterSerialization>
    <EnableUnsafeUTF7Encoding Condition="'$(EnableUnsafeUTF7Encoding)' == ''">false</EnableUnsafeUTF7Encoding>
    <BuiltInComInteropSupport Condition="'$(BuiltInComInteropSupport)' == ''">false</BuiltInComInteropSupport>
    <AutoreleasePoolSupport Condition="'$(AutoreleasePoolSupport)' == ''">false</AutoreleasePoolSupport>
    <EnableCppCLIHostActivation Condition="'$(EnableCppCLIHostActivation)' == ''">false</EnableCppCLIHostActivation>
    <!-- C++/CLI activation requires native hosting -->
    <_EnableConsumingManagedCodeFromNativeHosting Condition="'$(EnableCppCLIHostActivation)' == 'true'">true</_EnableConsumingManagedCodeFromNativeHosting>
    <_EnableConsumingManagedCodeFromNativeHosting Condition="'$(_EnableConsumingManagedCodeFromNativeHosting)' == ''">false</_EnableConsumingManagedCodeFromNativeHosting>
    <VerifyDependencyInjectionOpenGenericServiceTrimmability Condition="'$(VerifyDependencyInjectionOpenGenericServiceTrimmability)' == ''">true</VerifyDependencyInjectionOpenGenericServiceTrimmability>
  </PropertyGroup>


  <PropertyGroup Condition="'$(SuppressTrimAnalysisWarnings)' == '' And '$(PublishTrimmed)' == 'true' And '$(EnableTrimAnalyzer)' != 'true'">
    <!-- Trim analysis warnings are suppressed for .NET < 6. -->
    <SuppressTrimAnalysisWarnings Condition="$([MSBuild]::VersionLessThan('$(TargetFrameworkVersion)', '6.0'))">true</SuppressTrimAnalysisWarnings>
    <!-- Suppress for WPF/WinForms -->
    <SuppressTrimAnalysisWarnings Condition="'$(UseWpf)' == 'true' Or '$(UseWindowsForms)' == 'true'">true</SuppressTrimAnalysisWarnings>
    <!-- Otherwise, for .NET 6+, warnings are on by default -->
    <SuppressTrimAnalysisWarnings Condition="'$(SuppressTrimAnalysisWarnings)' == ''">false</SuppressTrimAnalysisWarnings>
  </PropertyGroup>

  <!-- Suppress warnings produced by the linker or by the ILLink Roslyn analyzer. -->
  <PropertyGroup Condition="'$(SuppressTrimAnalysisWarnings)' == 'true'">
    <_ExtraTrimmerArgs>$(_ExtraTrimmerArgs) --notrimwarn</_ExtraTrimmerArgs>
    <EnableTrimAnalyzer Condition="'$(EnableTrimAnalyzer)' == ''">false</EnableTrimAnalyzer>
  </PropertyGroup>

  <!-- Disable Redundant Warning Suppressions by default-->
  <PropertyGroup Condition="'$(_TrimmerShowRedundantSuppressions)' != 'true'">
    <NoWarn>$(NoWarn);IL2121</NoWarn>
  </PropertyGroup>

  <!--
    ============================================================
                     ILLink

    Replace the files to be published with versions that have been
    passed through the linker. Also prevent removed files from being
    included in the generated deps.json.
    ============================================================
    -->
  <Target Name="ILLink"
          Condition=" '$(PublishTrimmed)' == 'true' And
                      '$(RunILLink)' != 'false' And
                      '$(_TargetFrameworkVersionWithoutV)' >= '3.0' And '$(TargetFrameworkIdentifier)' == '.NETCoreApp' "
          DependsOnTargets="_RunILLink">

    <NETSdkError Condition="'$(_ILLinkExitCode)' != '' And '$(_ILLinkExitCode)' != '0'" ResourceName="ILLinkFailed" />

    <ItemGroup>
      <_LinkedResolvedFileToPublish Include="@(_LinkedResolvedFileToPublishCandidate)" Condition="Exists('%(Identity)')" />
      <ResolvedFileToPublish Remove="@(ManagedAssemblyToLink)" />
      <ResolvedFileToPublish Remove="@(_PDBToLink)" />
      <ResolvedFileToPublish Include="@(_LinkedResolvedFileToPublish)" />
    </ItemGroup>

    <!-- Remove assemblies from inputs to GenerateDepsFile. See
         https://github.com/dotnet/sdk/pull/3086 -->
    <ItemGroup>
      <_RemovedManagedAssembly Include="@(ManagedAssemblyToLink)" Condition="!Exists('$(IntermediateLinkDir)%(Filename)%(Extension)')" />

      <ResolvedCompileFileDefinitions Remove="@(_RemovedManagedAssembly)" />
      <RuntimeCopyLocalItems Remove="@(_RemovedManagedAssembly)" />
      <RuntimeTargetsCopyLocalItems Remove="@(_RemovedManagedAssembly)" />
      <UserRuntimeAssembly Remove="@(_RemovedManagedAssembly)" />
      <RuntimePackAsset Remove="@(_RemovedManagedAssembly)" />
    </ItemGroup>

  </Target>


  <!--
    ============================================================
                     _RunILLink

    Execute the linker. This target runs incrementally, only executing
    if the output semaphore file is out of date with respect to the inputs.
    ============================================================
    -->
  <UsingTask TaskName="ILLink" AssemblyFile="$(ILLinkTasksAssembly)" Condition="'$(ILLinkTasksAssembly)' != ''" />
  <Target Name="_RunILLink"
          DependsOnTargets="_ComputeManagedAssemblyToLink;PrepareForILLink"
          Inputs="$(MSBuildAllProjects);@(ManagedAssemblyToLink);@(TrimmerRootDescriptor);@(ReferencePath)"
          Outputs="$(_LinkSemaphore)">
    <NETSdkInformation ResourceName="ILLinkRunning" />
    <!-- When running from Desktop MSBuild, DOTNET_HOST_PATH is not set.
         In this case, explicitly specify the path to the dotnet host. -->
    <PropertyGroup Condition=" '$(DOTNET_HOST_PATH)' == '' ">
      <_DotNetHostDirectory>$(NetCoreRoot)</_DotNetHostDirectory>
      <_DotNetHostFileName>dotnet</_DotNetHostFileName>
      <_DotNetHostFileName Condition="$([MSBuild]::IsOSPlatform(`Windows`))">dotnet.exe</_DotNetHostFileName>
    </PropertyGroup>

    <Delete Files="@(_LinkedResolvedFileToPublishCandidate)" />
    <ILLink AssemblyPaths="@(ManagedAssemblyToLink)"
            ReferenceAssemblyPaths="@(ReferencePath)"
            RootAssemblyNames="@(TrimmerRootAssembly)"
            TrimMode="$(TrimMode)"
            DefaultAction="$(_TrimmerDefaultAction)"
            RemoveSymbols="$(TrimmerRemoveSymbols)"
            FeatureSettings="@(_TrimmerFeatureSettings)"
            CustomData="@(_TrimmerCustomData)"

            BeforeFieldInit="$(_TrimmerBeforeFieldInit)"
            OverrideRemoval="$(_TrimmerOverrideRemoval)"
            UnreachableBodies="$(_TrimmerUnreachableBodies)"
            UnusedInterfaces="$(_TrimmerUnusedInterfaces)"
            IPConstProp="$(_TrimmerIPConstProp)"
            Sealer="$(_TrimmerSealer)"

            Warn="$(ILLinkWarningLevel)"
            NoWarn="$(NoWarn)"
            TreatWarningsAsErrors="$(ILLinkTreatWarningsAsErrors)"
            WarningsAsErrors="$(WarningsAsErrors)"
            WarningsNotAsErrors="$(WarningsNotAsErrors)"
            SingleWarn="$(TrimmerSingleWarn)"

            CustomSteps="@(_TrimmerCustomSteps)"
            RootDescriptorFiles="@(TrimmerRootDescriptor)"
            OutputDirectory="$(IntermediateLinkDir)"
            DumpDependencies="$(_TrimmerDumpDependencies)"
            DependenciesFileFormat="$(_TrimmerDependenciesFileFormat)"
            ExtraArgs="$(_ExtraTrimmerArgs)"
            ToolExe="$(_DotNetHostFileName)"
            ToolPath="$(_DotNetHostDirectory)"
            ContinueOnError="ErrorAndContinue">
        <Output TaskParameter="ExitCode" PropertyName="_ILLinkExitCode" />
      </ILLink>

     <Touch Files="$(_LinkSemaphore)" AlwaysCreate="true" Condition=" '$(_ILLinkExitCode)' == '0' " />

  </Target>

  <!--
    ============================================================
                     PrepareForILLink

    Set up the default options and inputs to ILLink. Other targets are expected to hook into
    this extension point via BeforeTargets/AfterTargets to opt assemblies into or out of trimming
    using global ILLink options, or per-assembly IsTrimmable and TrimMode metadata.

    Note that adding items to or removing items from ManagedAssemblyToLink is unsupported. To change
    the set of inputs to the linker, instead use a different extension point to
    set PostprocessAssembly metadata on ResolvedFileToPublish.
   -->
   <Target Name="PrepareForILLink"
           DependsOnTargets="_ComputeManagedAssemblyToLink">

    <!-- We print a message to the user to explain that trimming is
         potentially problematic when warnings are suppressed. -->
    <NETSdkInformation Condition="'$(PublishTrimmed)' == 'true' And '$(SuppressTrimAnalysisWarnings)' == 'true'" ResourceName="ILLinkOptimizedAssemblies" />

    <!-- The defaults currently root non-framework assemblies, which
         is a no-op for portable apps. If we later support more ways
         to customize the behavior we can allow linking portable apps
         in some cases. If we're not running ILLink because e.g. this
         is a NativeAOT app, value of SelfContained doesn't matter. -->
    <NETSdkError Condition="'$(RunILLink)' != 'false' And '$(SelfContained)' != 'true'" ResourceName="ILLinkNotSupportedError" />

    <PropertyGroup Condition=" '$(ILLinkWarningLevel)' == '' ">
      <ILLinkWarningLevel Condition=" '$(EffectiveAnalysisLevel)' != '' And
                                       $([MSBuild]::VersionGreaterThanOrEquals($(EffectiveAnalysisLevel), '5.0')) ">5</ILLinkWarningLevel>
      <ILLinkWarningLevel Condition=" '$(ILLinkWarningLevel)' == '' ">0</ILLinkWarningLevel>
    </PropertyGroup>

    <!-- In .NET 7, TrimmerDefaultAction is deprecated. TrimMode can be used for the supported configurations. -->
    <Warning Condition="'$(TrimmerDefaultAction)' != '' And $([MSBuild]::VersionGreaterThan('$(TargetFrameworkVersion)', '6.0'))"
             Text="Property 'TrimmerDefaultAction' is deprecated in .NET 7 and will be ignored. Use TrimMode instead." />

    <!-- Use a sidecar file to suppress warnings when targeting net6.0, for changes that added or changed warnings. -->
    <ItemGroup Condition="$([MSBuild]::VersionEquals($(TargetFrameworkVersion), '6.0'))">
      <_ILLinkSuppressions Include="$(MSBuildThisFileDirectory)6.0_suppressions.xml" />
    </ItemGroup>

    <PropertyGroup Condition="'@(_ILLinkSuppressions->Count())' != '0'">
      <_ExtraTrimmerArgs>$(_ExtraTrimmerArgs) --link-attributes "@(_ILLinkSuppressions->'%(Identity)', '" --link-attributes "')"</_ExtraTrimmerArgs>
    </PropertyGroup>

    <!-- Set up TrimMode and TrimmerDefaultAction. -->
    <PropertyGroup>
      <TrimMode Condition="'$(TrimMode)' == '' And $([MSBuild]::VersionLessThan($(TargetFrameworkVersion), '6.0'))">copyused</TrimMode>
      <TrimMode Condition="'$(TrimMode)' == '' And $([MSBuild]::VersionEquals($(TargetFrameworkVersion), '6.0'))">partial</TrimMode>
      <TrimMode Condition="'$(TrimMode)' == ''">full</TrimMode>

      <!-- Set TrimmerDefaultAction for compat in < 7.0 -->
      <_TrimmerDefaultAction Condition="$([MSBuild]::VersionLessThan($(TargetFrameworkVersion), '7.0'))">$(TrimmerDefaultAction)</_TrimmerDefaultAction>
      <_TrimmerDefaultAction Condition="'$(_TrimmerDefaultAction)' == '' And $([MSBuild]::VersionLessThan($(TargetFrameworkVersion), '6.0'))">$(TrimMode)</_TrimmerDefaultAction>
      <_TrimmerDefaultAction Condition="'$(_TrimmerDefaultAction)' == '' And $([MSBuild]::VersionEquals($(TargetFrameworkVersion), '6.0'))">copy</_TrimmerDefaultAction>
    </PropertyGroup>

    <PropertyGroup>
      <ILLinkTreatWarningsAsErrors Condition=" '$(ILLinkTreatWarningsAsErrors)' == '' ">$(TreatWarningsAsErrors)</ILLinkTreatWarningsAsErrors>
      <_ExtraTrimmerArgs>--skip-unresolved true $(_ExtraTrimmerArgs)</_ExtraTrimmerArgs>
      <TrimmerSingleWarn Condition=" '$(TrimmerSingleWarn)' == '' ">true</TrimmerSingleWarn>
    </PropertyGroup>

   <!-- Suppressions to work around issues in previous versions of the framework. See https://github.com/dotnet/runtime/issues/40336 -->
    <PropertyGroup Condition="'$(SuppressTrimAnalysisWarnings)' == 'true' And $([MSBuild]::VersionLessThan('$(TargetFrameworkVersion)', '6.0'))">
      <!-- Framework embedded XML descriptors reference windows-only members. -->
      <NoWarn Condition=" !$(RuntimeIdentifier.StartsWith('win')) ">$(NoWarn);IL2008</NoWarn> <!-- Unresolved type referenced in XML. -->
      <NoWarn Condition=" !$(RuntimeIdentifier.StartsWith('win')) ">$(NoWarn);IL2009</NoWarn> <!-- Unresolved member on type referenced in XML. -->
      <!-- Framework has DynamicDependencyAttributes that reference windows-only members. -->
      <NoWarn Condition=" !$(RuntimeIdentifier.StartsWith('win')) ">$(NoWarn);IL2037</NoWarn> <!-- Unresolved member for DynamicDependencyAttribute -->
      <!-- Framework embedded XML descriptors reference 32-bit-only members. -->
      <NoWarn Condition=" '$(PlatformTarget)' != 'x64' AND '$(PlatformTarget)' != 'arm64'">$(NoWarn);IL2009;IL2012</NoWarn> <!-- Unresolved field referenced in XML -->
    </PropertyGroup>

    <!-- Enable serialization discovery for compat in < 7.0 -->
    <PropertyGroup Condition="$([MSBuild]::VersionLessThan('$(TargetFrameworkVersion)', '7.0'))">
      <_ExtraTrimmerArgs>--enable-serialization-discovery $(_ExtraTrimmerArgs)</_ExtraTrimmerArgs>
    </PropertyGroup>

    <!-- Set a default value for TrimmerRemoveSymbols unless set explicitly. -->
    <PropertyGroup Condition=" '$(TrimmerRemoveSymbols)' == '' ">
      <!-- The default is to remove symbols when debugger support is disabled, and keep them otherwise. -->
      <TrimmerRemoveSymbols Condition=" '$(DebuggerSupport)' == 'false' ">true</TrimmerRemoveSymbols>
      <TrimmerRemoveSymbols Condition=" '$(DebuggerSupport)' != 'false' ">false</TrimmerRemoveSymbols>
    </PropertyGroup>

    <PropertyGroup Condition="'$(_TrimmerUnreachableBodies)' == '' And
                              '$(PublishTrimmed)' == 'true' And
                              $([MSBuild]::VersionLessThan($(_TargetFrameworkVersionWithoutV), '6.0'))">
      <_TrimmerUnreachableBodies>false</_TrimmerUnreachableBodies>
    </PropertyGroup>

    <!-- Set IsTrimmable for any assemblies that already have customized TrimMode. -->
    <ItemGroup>
      <ManagedAssemblyToLink Condition=" '%(ManagedAssemblyToLink.TrimMode)' != '' ">
        <IsTrimmable>true</IsTrimmable>
      </ManagedAssemblyToLink>
    </ItemGroup>

    <!-- SetIsTrimmable for any assemblies listed in TrimmableAssembly. -->
    <JoinItems Left="@(ManagedAssemblyToLink)" LeftKey="FileName" LeftMetadata="*"
               Right="@(TrimmableAssembly)"
               ItemSpecToUse="Left">
      <Output TaskParameter="JoinResult" ItemName="_TrimmableManagedAssemblyToLink" />
    </JoinItems>
    <ItemGroup>
      <ManagedAssemblyToLink Remove="@(_TrimmableManagedAssemblyToLink)" />
      <ManagedAssemblyToLink Include="@(_TrimmableManagedAssemblyToLink)" IsTrimmable="true" />
    </ItemGroup>

    <!-- Root the main assembly, whether or not it has IsTrimmable set. -->
    <ItemGroup>
      <TrimmerRootAssembly Include="@(IntermediateAssembly)" />
    </ItemGroup>

    <!-- For .NET < 6, root and copy assemblies without IsTrimmable=true MSBuild metadata. -->
    <ItemGroup Condition=" $([MSBuild]::VersionLessThan('$(TargetFrameworkVersion)', '6.0')) ">
      <TrimmerRootAssembly Include="@(ManagedAssemblyToLink)" Condition=" '%(ManagedAssemblyToLink.IsTrimmable)' != 'true' " />
      <ManagedAssemblyToLink Condition=" '%(ManagedAssemblyToLink.IsTrimmable)' != 'true' ">
        <TrimMode>copy</TrimMode>
      </ManagedAssemblyToLink>
    </ItemGroup>

    <ItemGroup>
      <!-- Don't collapse to a single warning for the intermediate assembly.
           This just sets metadata on the items in ManagedAssemblyToLink that came from IntermediateAssembly. -->
      <!-- Find ManagedAssemblyToLink _except_ IntermediateAssembly -->
      <__SingleWarnIntermediateAssembly Include="@(ManagedAssemblyToLink)" />
      <__SingleWarnIntermediateAssembly Remove="@(IntermediateAssembly)" />
      <!-- Subtract these from ManagedAssemblyToLink, to get the intersection. -->
      <_SingleWarnIntermediateAssembly Include="@(ManagedAssemblyToLink)" />
      <_SingleWarnIntermediateAssembly Remove="@(__SingleWarnIntermediateAssembly)" />
      <!-- Set metadata on the intersection. -->
      <_SingleWarnIntermediateAssembly>
        <TrimmerSingleWarn Condition=" '%(_SingleWarnIntermediateAssembly.TrimmerSingleWarn)' == '' ">false</TrimmerSingleWarn>
      </_SingleWarnIntermediateAssembly>
      <!-- Replace these items in ManagedAssemblyToLink. -->
      <ManagedAssemblyToLink Remove="@(_SingleWarnIntermediateAssembly)" />
      <ManagedAssemblyToLink Include="@(_SingleWarnIntermediateAssembly)" />

      <!-- Don't collapse to a single warning for project references -->
      <ManagedAssemblyToLink Condition=" '%(ManagedAssemblyToLink.ProjectReferenceOriginalItemSpec)' != '' ">
        <TrimmerSingleWarn Condition=" '%(ManagedAssemblyToLink.TrimmerSingleWarn)' == '' ">false</TrimmerSingleWarn>
      </ManagedAssemblyToLink>
    </ItemGroup>

    <ItemGroup>
      <_TrimmerFeatureSettings Include="@(RuntimeHostConfigurationOption)" Condition="'%(RuntimeHostConfigurationOption.Trim)' == 'true'" />
    </ItemGroup>

   </Target>

  <!--
    ============================================================
                     _ComputeManagedAssemblyToLink

    Compute the set of inputs to the linker.
    ============================================================
    -->
  <UsingTask TaskName="ComputeManagedAssemblies" AssemblyFile="$(ILLinkTasksAssembly)" Condition="'$(ILLinkTasksAssembly)' != ''" />
  <Target Name="_ComputeManagedAssemblyToLink" DependsOnTargets="_ComputeAssembliesToPostprocessOnPublish">

    <!-- NB: There should not be non-managed assemblies in this list, but we still give the linker a chance to
         further refine this list. It currently drops C++/CLI assemblies in ComputeManageAssemblies. -->
    <ComputeManagedAssemblies Assemblies="@(ResolvedFileToPublish->WithMetadataValue('PostprocessAssembly', 'true'))">
      <Output TaskParameter="ManagedAssemblies" ItemName="ManagedAssemblyToLink" />
    </ComputeManagedAssemblies>

    <ItemGroup>
      <!-- The linker implicitly picks up PDBs next to input assemblies. We will filter these out of the publish set. -->
      <__PDBToLink Include="@(ResolvedFileToPublish)" Exclude="@(ManagedAssemblyToLink->'%(RelativeDir)%(Filename).pdb')" />
      <_PDBToLink Include="@(ResolvedFileToPublish)" Exclude="@(__PDBToLink)" />
    </ItemGroup>

    <ItemGroup>
      <_LinkedResolvedFileToPublishCandidate Include="@(ManagedAssemblyToLink->'$(IntermediateLinkDir)%(Filename)%(Extension)')" />
      <_LinkedResolvedFileToPublishCandidate Include="@(_PDBToLink->'$(IntermediateLinkDir)%(Filename)%(Extension)')" />
    </ItemGroup>
  </Target>

</Project>

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