Use live illink to trim framework

Directory.Build.props

@@ -136,6 +136,7 @@
     <LibrariesConfiguration Condition="'$(LibrariesConfiguration)' == ''">$(Configuration)</LibrariesConfiguration>
     <HostConfiguration Condition="'$(HostConfiguration)' == ''">$(Configuration)</HostConfiguration>
     <TasksConfiguration Condition="'$(TasksConfiguration)' == ''">$(Configuration)</TasksConfiguration>
+    <ToolsConfiguration Condition="'$(ToolsConfiguration)' == ''">$(Configuration)</ToolsConfiguration>
   </PropertyGroup>
 
   <PropertyGroup>

eng/Subsets.props

@@ -558,11 +558,13 @@
       <AdditionalProperties Condition="'%(ProjectToBuild.Category)' == 'libs'">%(AdditionalProperties);Configuration=$(LibrariesConfiguration)</AdditionalProperties>
       <AdditionalProperties Condition="'%(ProjectToBuild.Category)' == 'host'">%(AdditionalProperties);Configuration=$(HostConfiguration)</AdditionalProperties>
       <AdditionalProperties Condition="'%(ProjectToBuild.Category)' == 'tasks'">%(AdditionalProperties);Configuration=$(TasksConfiguration)</AdditionalProperties>
+      <AdditionalProperties Condition="'%(ProjectToBuild.Category)' == 'tools'">%(AdditionalProperties);Configuration=$(ToolsConfiguration)</AdditionalProperties>
 
       <!-- Propagate configurations for cross-subset builds -->
       <AdditionalProperties>%(AdditionalProperties);LibrariesConfiguration=$(LibrariesConfiguration)</AdditionalProperties>
       <AdditionalProperties>%(AdditionalProperties);HostConfiguration=$(HostConfiguration)</AdditionalProperties>
       <AdditionalProperties>%(AdditionalProperties);TasksConfiguration=$(TasksConfiguration)</AdditionalProperties>
+      <AdditionalProperties>%(AdditionalProperties);ToolsConfiguration=$(ToolsConfiguration)</AdditionalProperties>
     </ProjectToBuild>
   </ItemGroup>
 

eng/illink.targets

@@ -1,5 +1,26 @@
 <Project>
 
+  <PropertyGroup>
+    <_ILLinkTasksSourceDir>$(ToolsProjectRoot)illink\src\ILLink.Tasks\</_ILLinkTasksSourceDir>
+    <ILLinkAnalyzersPropsPath>$(ToolsProjectRoot)illink\src\ILLink.RoslynAnalyzer\build\Microsoft.NET.ILLink.Analyzers.props</ILLinkAnalyzersPropsPath>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <!-- SkipGetTargetFrameworkProperties builds ILLink.Tasks without any TargetFramework settings
+         based on the referencing project, preventing errors when illink.targets is imported by a
+         project with TargetFrameworks that are incompatible with those of ILLink.Tasks. -->
+    <ProjectReference Include="$(_ILLinkTasksSourceDir)ILLink.Tasks.csproj"
+                      ReferenceOutputAssembly="false"
+                      PrivateAssets="all"
+                      SetConfiguration="Configuration=$(ToolsConfiguration)">
+        <!-- Keep TFMs in sync with ILLink.Tasks.csproj -->
+        <SetTargetFramework Condition="'$(MSBuildRuntimeType)' == 'Core'">TargetFramework=$(NetCoreAppToolCurrent)</SetTargetFramework>
+        <SetTargetFramework Condition="'$(MSBuildRuntimeType)' != 'Core'">TargetFramework=$(NetFrameworkToolCurrent)</SetTargetFramework>
+    </ProjectReference>
+  </ItemGroup>
+
+  <Import Project="$(_ILLinkTasksSourceDir)build\Microsoft.NET.ILLink.Tasks.props" />
+
   <PropertyGroup>
     <IsTrimmable Condition="'$(IsTrimmable)' == ''">true</IsTrimmable>
     <!-- Don't use SDK's trimming functionality.
@@ -10,6 +31,7 @@
          we might be able to use built-in functionality instead of a packagereference.
          -->
     <_RequiresILLinkPack>false</_RequiresILLinkPack>
+    <ILLinkTasksAssembly>$(ToolsILLinkDir)$(NetCoreAppToolCurrent)/ILLink.Tasks.dll</ILLinkTasksAssembly>
     <PrepareResourcesDependsOn>_EmbedILLinkXmls;$(PrepareResourcesDependsOn)</PrepareResourcesDependsOn>
     <TargetsTriggeredByCompilation Condition="'$(DesignTimeBuild)' != 'true'">$(TargetsTriggeredByCompilation);ILLinkTrimAssembly</TargetsTriggeredByCompilation>
 
@@ -43,14 +65,6 @@
     <GenerateResourcesSubstitutions Condition="'$(GenerateResourcesSubstitutions)' == '' and '$(StringResourcesPath)' != ''">true</GenerateResourcesSubstitutions>
   </PropertyGroup>
 
-  <!-- Use ILLink.Tasks version matching the SDK used to build. See comment about _RequiresILLinkPack. -->
-  <PropertyGroup>
-    <SuppressILLinkExplicitPackageReferenceWarning>true</SuppressILLinkExplicitPackageReferenceWarning>
-  </PropertyGroup>
-  <ItemGroup>
-    <PackageReference Include="Microsoft.NET.ILLink.Tasks" Version="$(BundledNETCoreAppPackageVersion)" PrivateAssets="all" />
-  </ItemGroup>
-
   <ItemGroup>
     <ILLinkSuppressionsXmls Include="$(ILLinkSuppressionsXmlFile)"
                             Condition="Exists('$(ILLinkSuppressionsXmlFile)')" />

eng/liveBuilds.targets

@@ -29,7 +29,7 @@
     <CoreCLRAotSdkDir>$([MSBuild]::NormalizeDirectory('$(CoreCLRArtifactsPath)', 'aotsdk'))</CoreCLRAotSdkDir>
     <CoreCLRBuildIntegrationDir>$([MSBuild]::NormalizeDirectory('$(CoreCLRArtifactsPath)', 'build'))</CoreCLRBuildIntegrationDir>
 
-    <ToolsILLinkDir>$([MSBuild]::NormalizeDirectory('$(ArtifactsBinDir)', 'ILLink.Tasks', '$(Configuration)'))</ToolsILLinkDir>
+    <ToolsILLinkDir>$([MSBuild]::NormalizeDirectory('$(ArtifactsBinDir)', 'ILLink.Tasks', '$(ToolsConfiguration)'))</ToolsILLinkDir>
 
     <MonoAotCrossDir>$([MSBuild]::NormalizeDirectory('$(MonoArtifactsPath)', 'cross', $(TargetOS)-$(TargetArchitecture.ToLowerInvariant())))</MonoAotCrossDir>
     <GrpcServerDockerImageDir>$([MSBuild]::NormalizeDirectory('$(LibrariesArtifactsPath)', 'obj', 'grpcserver', 'docker'))</GrpcServerDockerImageDir>

src/libraries/Directory.Build.targets

@@ -127,7 +127,7 @@
   <Import Project="$(RepositoryEngineeringDir)testing\coverage.targets" Condition="'$(EnableRunSettingsSupport)' == 'true' or '$(EnableCoverageSupport)' == 'true'" />
   <Import Project="$(RepositoryEngineeringDir)slngen.targets" Condition="'$(IsSlnGen)' == 'true'" />
 
-  <Import Project="$(RepositoryEngineeringDir)illink.targets" Condition="'$(IsSourceProject)' == 'true'" />
+  <Import Project="$(RepositoryEngineeringDir)illink.targets" Condition="'$(IsSourceProject)' == 'true' or '$(ExplicitlyImportCustomILLinkTargets)' == 'true'" />
   <Import Project="$(RepositoryEngineeringDir)AvoidRestoreCycleOnSelfReference.targets" Condition="'$(AvoidRestoreCycleOnSelfReference)' == 'true'" />
   <Import Project="$(RepositoryEngineeringDir)nativeSanitizers.targets" />
 

src/libraries/oob.proj

@@ -4,6 +4,8 @@
     <TargetFramework>$(NetCoreAppCurrent)-$(TargetOS)</TargetFramework>
     <!-- By default, build the NetCoreAppCurrent vertical only. -->
     <BuildTargetFramework Condition="'$(BuildAllConfigurations)' != 'true'">$(NetCoreAppCurrent)</BuildTargetFramework>
+     <!-- Import the illink file which contains some of the logic required to illink the out-of-band assemblies. -->
+    <ExplicitlyImportCustomILLinkTargets Condition="'$(BuildTargetFramework)' == '$(NetCoreAppCurrent)' or '$(BuildTargetFramework)' == ''">true</ExplicitlyImportCustomILLinkTargets>
   </PropertyGroup>
 
   <ItemGroup Condition="'$(BuildTargetFramework)' == '$(NetCoreAppCurrent)' or '$(BuildTargetFramework)' == ''">
@@ -25,11 +27,6 @@
     <ProjectReference Include="oob-ref.proj" />
   </ItemGroup>
 
-  <ImportGroup Condition="'$(BuildTargetFramework)' == '$(NetCoreAppCurrent)' or '$(BuildTargetFramework)' == ''">
-    <!-- Import the illink file which contains some of the logic required to illink the out-of-band assemblies. -->
-    <Import Project="$(RepositoryEngineeringDir)illink.targets" />
-  </ImportGroup>
-
   <Target Name="GetTrimOOBAssembliesInputs"
           DependsOnTargets="ResolveProjectReferences">
     <PropertyGroup>

src/libraries/sfx.proj

@@ -7,6 +7,8 @@
     <BuildInParallel>false</BuildInParallel>
     <IsPackable>false</IsPackable>
     <FrameworkListOutputPath>$(MicrosoftNetCoreAppRefPackDataDir)FrameworkList.xml</FrameworkListOutputPath>
+    <!-- Import the illink file which contains some of the logic required to illink the shared framework assemblies. -->
+    <ExplicitlyImportCustomILLinkTargets>true</ExplicitlyImportCustomILLinkTargets>
   </PropertyGroup>
 
   <ItemGroup>
@@ -71,9 +73,6 @@
           UseHardlinksIfPossible="true" />
   </Target>
 
-  <!-- Import the illink file which contains some of the logic required to illink the shared framework assemblies. -->
-  <Import Project="$(RepositoryEngineeringDir)illink.targets" />
-
   <Target Name="GetTrimSharedFrameworkAssembliesInputs"
           DependsOnTargets="ResolveProjectReferences">
     <PropertyGroup>

src/tools/illink/src/ILLink.Tasks/build/Microsoft.NET.ILLink.Tasks.props

@@ -14,14 +14,16 @@ Copyright (c) .NET Foundation. All rights reserved.
   <PropertyGroup>
     <!-- N.B. The ILLinkTargetsPath is used as a sentinel to indicate a version of this file has already been imported. It will also be the path
          used to import the targets later in the SDK. -->
-    <ILLinkTargetsPath>$(MSBuildThisFileDirectory)Microsoft.NET.ILLink.targets</ILLinkTargetsPath>
+    <ILLinkTargetsPath Condition="'$(ILLinkTargetsPath)' == ''">$(MSBuildThisFileDirectory)Microsoft.NET.ILLink.targets</ILLinkTargetsPath>
     <!-- Older SDKs used this property as a sentinel instead, to control the import of this file 
          (but not the targets, which were included with the SDK). -->
     <UsingILLinkTasksSdk>true</UsingILLinkTasksSdk>
     <ILLinkTasksAssembly Condition="'$(MSBuildRuntimeType)' == 'Core'">$(MSBuildThisFileDirectory)..\tools\net8.0\ILLink.Tasks.dll</ILLinkTasksAssembly>
     <ILLinkTasksAssembly Condition="'$(MSBuildRuntimeType)' != 'Core'">$(MSBuildThisFileDirectory)..\tools\net472\ILLink.Tasks.dll</ILLinkTasksAssembly>
+
+    <ILLinkAnalyzersPropsPath Condition="'$(ILLinkAnalyzersPropsPath)' == ''">$(MSBuildThisFileDirectory)Microsoft.NET.ILLink.Analyzers.props</ILLinkAnalyzersPropsPath>
   </PropertyGroup>
 
-  <Import Project="Microsoft.NET.ILLink.Analyzers.props" />
+  <Import Project="$(ILLinkAnalyzersPropsPath)" />
 
 </Project>