Update to target .NET5 framework

Directory.Build.props

@@ -7,6 +7,8 @@
     <IsReferenceAssembly Condition="'$(IsReferenceAssembly)' == '' and '$([System.IO.Path]::GetFileName($(MSBuildProjectDirectory)))' == 'ref'">true</IsReferenceAssembly>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(IsReferenceAssembly)' == 'true' ">
+    <!-- Since .NET 5 reference assemblies are always produced -->
+    <ProduceReferenceAssembly>false</ProduceReferenceAssembly>
     <ProduceOnlyReferenceAssembly>true</ProduceOnlyReferenceAssembly>
     <!-- Used by Arcade to compute OutputPath, IntermediateOutputPath, etc. early in the import chain. -->
     <OutDirName>$(MSBuildProjectName)/ref</OutDirName>

eng/Versions.props

@@ -17,7 +17,7 @@
     <!-- see https://github.com/dotnet/runtime/issues/1338 -->
     <MicrosoftNETCoreILAsmVersion>$(MicrosoftNETSdkILPackageVersion)</MicrosoftNETCoreILAsmVersion>
     <!-- These should match the SDK version at https://github.com/dotnet/sdk/blob/master/eng/Versions.props -->
-    <SystemReflectionMetadataVersion>1.5.0</SystemReflectionMetadataVersion>
+    <SystemReflectionMetadataVersion>1.8.0</SystemReflectionMetadataVersion>
     <MicrosoftBuildFrameworkVersion>15.4.8</MicrosoftBuildFrameworkVersion>
     <MicrosoftBuildUtilitiesCoreVersion>15.4.8</MicrosoftBuildUtilitiesCoreVersion>
     <MicrosoftDotNetApiCompatVersion>5.0.0-beta.20427.5</MicrosoftDotNetApiCompatVersion>

eng/ilasm.ilproj

@@ -4,7 +4,7 @@
   project. -->
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
   <Target Name="CopyILAsmTool" DependsOnTargets="ResolveIlasmToolPaths" Condition="'$(MonoBuild)' == ''">

global.json

@@ -1,9 +1,9 @@
 {
   "tools": {
-    "dotnet": "5.0.100-preview.6.20310.4",
+    "dotnet": "5.0.100-rc.1.20454.5",
     "runtimes": {
       "dotnet": [
-        "3.0.0"
+        "5.0.0-rc.1.20451.14"
       ]
     }
   },

src/ILLink.Tasks/ILLink.Tasks.csproj

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <!-- Keep these in sync with _ILLinkTasksTFM in Sdk.props. -->
     <!-- Keep the netcoreapp TFM in sync with the Mono.Linker.csproj condition below. -->
-    <TargetFrameworks>netcoreapp3.0;net472</TargetFrameworks>
+    <TargetFrameworks>net5.0;net472</TargetFrameworks>
     <EnableDefaultCompileItems>false</EnableDefaultCompileItems>
     <Description>MSBuild tasks for running the IL Linker</Description>
     <LangVersion>latest</LangVersion>
@@ -36,7 +36,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="../linker/Mono.Linker.csproj" PrivateAssets="All" Condition=" '$(TargetFramework)' == 'netcoreapp3.0' " />
+    <ProjectReference Include="../linker/Mono.Linker.csproj" PrivateAssets="All" Condition=" '$(TargetFramework)' == 'net5.0' " />
     <PackageReference Condition="'$(UseCecilPackage)' == 'true'" Include="Mono.Cecil" Version="$(MonoCecilVersion)" PrivateAssets="All" Publish="True" />
     <ProjectReference Condition="'$(UseCecilPackage)' != 'true'" Include="../../external/cecil/Mono.Cecil.csproj" PrivateAssets="All" />
   </ItemGroup>

src/ILLink.Tasks/LinkTask.cs

@@ -235,7 +235,7 @@ public string ILLinkPath {
 
 				var taskDirectory = Path.GetDirectoryName (Assembly.GetExecutingAssembly ().Location);
 				// The linker always runs on .NET Core, even when using desktop MSBuild to host ILLink.Tasks.
-				_illinkPath = Path.Combine (Path.GetDirectoryName (taskDirectory), "netcoreapp3.0", "illink.dll");
+				_illinkPath = Path.Combine (Path.GetDirectoryName (taskDirectory), "net5.0", "illink.dll");
 				return _illinkPath;
 			}
 			set => _illinkPath = value;

src/analyzer/analyzer.csproj

@@ -9,7 +9,7 @@
 
   <PropertyGroup Condition="'$(MonoBuild)' == ''">
     <DefineConstants>$(DefineConstants);FEATURE_ILLINK</DefineConstants>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(MonoBuild)' != ''">

src/analyzer/common/Mono.Options/Options.cs

@@ -748,7 +748,7 @@ public string OptionName {
 			get {return this.option;}
 		}
 
-#if !PCL
+#if !PCL && !NETCOREAPP
 #pragma warning disable 618 // SecurityPermissionAttribute is obsolete
 		[SecurityPermission (SecurityAction.LinkDemand, SerializationFormatter = true)]
 #pragma warning restore 618

src/linker/Directory.Build.props

@@ -10,7 +10,6 @@
   <PropertyGroup Condition="'$(MonoBuild)' == ''">
     <AssemblyName>illink</AssemblyName>
     <Description>IL Linker</Description>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
     <PackageId>Microsoft.NET.ILLink</PackageId>
   </PropertyGroup>
 

src/linker/Mono.Linker.csproj

@@ -5,6 +5,7 @@
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(MonoBuild)' == ''">
+    <TargetFramework>net5.0</TargetFramework>
     <DefineConstants>$(DefineConstants);FEATURE_ILLINK</DefineConstants>
     <IsPackable>true</IsPackable>
     <!-- Nuget issues a warning about missing <reference> items in the generated nuspec,
@@ -31,6 +32,7 @@
     <Compile Remove="Linker.Steps\PreserveCalendarsStep.cs" />
     <Compile Remove="Linker.Steps\RemoveFeaturesStep.cs" />
     <Compile Remove="Linker.Steps\ResolveFromXApiStep.cs" />
+    <Compile Remove="System.Diagnostics.CodeAnalysis\*.cs" />
   </ItemGroup>
 
   <ItemGroup>

src/linker/ref/Mono.Linker.csproj

@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <BuildOutputTargetFolder>ref</BuildOutputTargetFolder>
+    <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>

test/ILLink.Tasks.Tests/ILLink.Tasks.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 

test/Mono.Linker.Tests.Cases.Expectations/Mono.Linker.Tests.Cases.Expectations.csproj

@@ -5,10 +5,14 @@
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(MonoBuild)' == ''">
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
   <PropertyGroup Condition="'$(MonoBuild)' != ''">
     <TargetFramework>net471</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup Condition="'$(MonoBuild)' == ''">
+    <Compile Remove="System.Diagnostics.CodeAnalysis\*.cs" />
+  </ItemGroup>
+
 </Project>

test/Mono.Linker.Tests.Cases/Mono.Linker.Tests.Cases.csproj

@@ -5,11 +5,11 @@
     <WarningLevel>0</WarningLevel>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
-    <LangVersion>8.0</LangVersion>
+    <LangVersion>Latest</LangVersion>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(MonoBuild)' == ''">
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <DefineConstants>$(DefineConstants);ILLINK</DefineConstants>
   </PropertyGroup>
 

test/Mono.Linker.Tests/Mono.Linker.Tests.csproj

@@ -7,11 +7,9 @@
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(MonoBuild)' == ''">
-    <TargetFramework>netcoreapp3.0</TargetFramework>
+    <TargetFramework>net5.0</TargetFramework>
     <DefineConstants>$(DefineConstants);ILLINK</DefineConstants>
     <DefineConstants Condition="'$(Configuration)' == 'Debug'">$(DefineConstants);DEBUG</DefineConstants>
-    <!-- Simulate https://github.com/dotnet/sdk/pull/2073 until it ships. -->
-    <DefineConstants Condition="'$(TargetFramework)' == 'netcoreapp3.0'">$(DefineConstants);NETCOREAPP</DefineConstants>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(MonoBuild)' != ''">

test/Mono.Linker.Tests/TestCases/TestDatabase.cs

@@ -251,12 +251,14 @@ static void GetDirectoryPaths (out string rootSourceDirectory, out string testCa
 			var configDirectoryName = "Release";
 #endif
 
-#if NETCOREAPP3_0
+#if NET5_0
+			var tfm = "net5.0";
+#elif NETCOREAPP3_0
 			var tfm = "netcoreapp3.0";
 #elif NET471
 			var tfm = "net471";
 #else
-			var tfm = "";
+#error "Unknown TFM"
 #endif
 
 #if ILLINK

test/Mono.Linker.Tests/TestCasesRunner/TestCaseSandbox.cs

@@ -127,7 +127,7 @@ public virtual void Populate (TestCaseMetadaProvider metadataProvider)
 
 		private static NPath GetExpectationsAssemblyPath ()
 		{
-			return new Uri (typeof (KeptAttribute).Assembly.CodeBase).LocalPath.ToNPath ();
+			return new Uri (typeof (KeptAttribute).Assembly.Location).LocalPath.ToNPath ();
 		}
 
 		protected void CopyToInputAndExpectations (NPath source)