Arm support (backport dotnet#14470)

Directory.Build.props

@@ -9,7 +9,7 @@
 
   <PropertyGroup>
     <BuildArchitecture>$([System.Runtime.InteropServices.RuntimeInformation]::ProcessArchitecture.ToString().ToLowerInvariant())</BuildArchitecture>
-    <Architecture Condition="'$(Architecture)' == '' AND '$(BuildArchitecture)' == 'arm64'">$(BuildArchitecture)</Architecture>
+    <Architecture Condition="'$(Architecture)' == '' AND ('$(BuildArchitecture)' == 'arm64' OR '$(BuildArchitecture)' == 'arm')">$(BuildArchitecture)</Architecture>
     <Architecture Condition="'$(Architecture)' == '' AND '$(BuildArchitecture)' == 's390x'">$(BuildArchitecture)</Architecture>
     <Architecture Condition="'$(Architecture)' == ''">x64</Architecture>
   </PropertyGroup>

Native.sln

@@ -11,22 +11,28 @@ Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|x86 = Debug|x86
 		Debug|x64 = Debug|x64
+		Debug|arm = Debug|arm
 		Debug|arm64 = Debug|arm64
 		Release|x86 = Release|x86
 		Release|x64 = Release|x64
+		Release|arm = Release|arm
 		Release|arm64 = Release|arm64
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
 		{688E2883-C5A9-4D66-A207-772C9160989C}.Debug|x86.ActiveCfg = Debug|x86
 		{688E2883-C5A9-4D66-A207-772C9160989C}.Debug|x86.Build.0 = Debug|x86
 		{688E2883-C5A9-4D66-A207-772C9160989C}.Debug|x64.ActiveCfg = Debug|x64
 		{688E2883-C5A9-4D66-A207-772C9160989C}.Debug|x64.Build.0 = Debug|x64
+		{688E2883-C5A9-4D66-A207-772C9160989C}.Debug|arm.ActiveCfg = Debug|arm
+		{688E2883-C5A9-4D66-A207-772C9160989C}.Debug|arm.Build.0 = Debug|arm
 		{688E2883-C5A9-4D66-A207-772C9160989C}.Debug|arm64.ActiveCfg = Debug|arm64
 		{688E2883-C5A9-4D66-A207-772C9160989C}.Debug|arm64.Build.0 = Debug|arm64
 		{688E2883-C5A9-4D66-A207-772C9160989C}.Release|x86.ActiveCfg = Release|x86
 		{688E2883-C5A9-4D66-A207-772C9160989C}.Release|x86.Build.0 = Release|x86
 		{688E2883-C5A9-4D66-A207-772C9160989C}.Release|x64.ActiveCfg = Release|x64
 		{688E2883-C5A9-4D66-A207-772C9160989C}.Release|x64.Build.0 = Release|x64
+		{688E2883-C5A9-4D66-A207-772C9160989C}.Release|arm.ActiveCfg = Release|arm
+		{688E2883-C5A9-4D66-A207-772C9160989C}.Release|arm.Build.0 = Release|arm
 		{688E2883-C5A9-4D66-A207-772C9160989C}.Release|arm64.ActiveCfg = Release|arm64
 		{688E2883-C5A9-4D66-A207-772C9160989C}.Release|arm64.Build.0 = Release|arm64
 	EndGlobalSection

eng/Build.props

@@ -1,7 +1,7 @@
 <Project>
   <ItemGroup Condition=" '$(ArcadeBuildTarball)' != 'true' ">
     <ProjectToBuild Include="$(RepoRoot)Microsoft.DotNet.Cli.sln" />
-    <ProjectToBuild Condition="'$(OS)' == 'Windows_NT' And ('$(Architecture)' == 'x86' Or '$(Architecture)' == 'x64' Or '$(Architecture)' == 'arm64')" 
+    <ProjectToBuild Condition="'$(OS)' == 'Windows_NT' And ('$(Architecture)' == 'x86' Or '$(Architecture)' == 'x64' Or '$(Architecture)' == 'arm64')"
                     Include="$(RepoRoot)eng\version.csproj;
                              $(RepoRoot)eng\native.proj" />
   </ItemGroup>

src/SourceBuild/tarball/content/Directory.Build.props

@@ -17,7 +17,7 @@
   <PropertyGroup>
     <Platform Condition="'$(Platform)' == 'AnyCPU'"></Platform>
     <BuildArchitecture>$([System.Runtime.InteropServices.RuntimeInformation]::ProcessArchitecture.ToString().ToLowerInvariant())</BuildArchitecture>
-    <Platform Condition="'$(Platform)' == '' AND '$(BuildArchitecture)' == 'arm64'">$(BuildArchitecture)</Platform>
+    <Platform Condition="'$(Platform)' == '' AND ('$(BuildArchitecture)' == 'arm64' OR '$(BuildArchitecture)' == 'arm')">$(BuildArchitecture)</Platform>
     <Platform Condition="'$(Platform)' == '' AND '$(BuildArchitecture)' == 's390x'">$(BuildArchitecture)</Platform>
     <Platform Condition="'$(Platform)' == ''">x64</Platform>
 

src/SourceBuild/tarball/content/repos/known-good.proj

@@ -18,7 +18,8 @@
         <RepositoryReference Include="runtime" />
       </ItemGroup>
     </When>
-    <When Condition="$(Platform.Contains('arm')) AND '$(BuildArchitecture)' != 'arm64'">
+    <!-- Originally used to capture arm platforms. Now with support, left as an extension point for bringing up new architectures in the future. -->
+    <When Condition="'true' == 'false'">
       <ItemGroup>
         <RepositoryReference Include="runtime" />
       </ItemGroup>

src/SourceBuild/tarball/content/repos/runtime.common.props

@@ -13,7 +13,7 @@
     <BuildCommandArgs>$(StandardSourceBuildArgs.Replace('-bl', '-nobl'))</BuildCommandArgs>
 
     <BuildCommand>$(StandardSourceBuildCommand) $(BuildCommandArgs)</BuildCommand>
-    <BuildCommand Condition="$(Platform.Contains('arm')) AND '$(BuildArchitecture)' != 'arm64'">$(ArmEnvironmentVariables) $(StandardSourceBuildCommand) $(BuildCommandArgs)</BuildCommand>
+    <BuildCommand Condition="$(Platform.Contains('arm')) AND '$(BuildArchitecture)' != 'arm64' AND '$(BuildArchitecture)' != 'arm'">$(ArmEnvironmentVariables) $(StandardSourceBuildCommand) $(BuildCommandArgs)</BuildCommand>
 
     <CleanCommand>$(ProjectDirectory)/clean$(ShellExtension)</CleanCommand>
   </PropertyGroup>

src/SourceBuild/tarball/content/tools-local/init-build.proj

@@ -138,7 +138,7 @@
   </Target>
 
   <Target Name="GenerateRootFs" Condition="'$(OS)' != 'Windows_NT'">
-     <Exec Condition="$(Platform.Contains('arm')) AND '$(Platform)' != 'armel' AND '$(BuildArchitecture)' != 'arm64'" Command="$(ArmEnvironmentVariables) $(ProjectDir)cross/build-rootfs.sh" />
+     <Exec Condition="$(Platform.Contains('arm')) AND '$(Platform)' != 'armel' AND '$(BuildArchitecture)' != 'arm64' AND '$(BuildArchitecture)' != 'arm'" Command="$(ArmEnvironmentVariables) $(ProjectDir)cross/build-rootfs.sh" />
      <Exec Condition="'$(Platform)' == 'armel'" Command="$(ArmEnvironmentVariables) $(ProjectDir)cross/armel/tizen-build-rootfs.sh" />
   </Target>