From ecd71d3502d0c4dd5289df25ea84d704a38e0a2d Mon Sep 17 00:00:00 2001
From: David Cantu <dacantu@microsoft.com>
Date: Mon, 19 Aug 2019 15:16:58 -0700
Subject: [PATCH] Revert "Enable build on hosted arm64 (#40311)"

This reverts commit 176da26d634fd760d7c8c99956f2e8d3f7d485e7.
---
 Directory.Build.props | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/Directory.Build.props b/Directory.Build.props
index 964441df552a..fe1f406a02d7 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -64,8 +64,10 @@
     <TargetGroup Condition="'$(TargetGroup)' == ''">netcoreapp</TargetGroup>
     <OSGroup Condition="'$(OSGroup)' == ''">$(DefaultOSGroup)</OSGroup>
     <ConfigurationGroup Condition="'$(ConfigurationGroup)' == ''">Debug</ConfigurationGroup>
-    <HostArch>$([System.Runtime.InteropServices.RuntimeInformation]::ProcessArchitecture.ToString().ToLowerInvariant())</HostArch>
-    <ArchGroup Condition="'$(ArchGroup)' == ''">$(HostArch)</ArchGroup>
+    <HostArch>$([System.Runtime.InteropServices.RuntimeInformation]::ProcessArchitecture)</HostArch>
+    <ArchGroup Condition="'$(ArchGroup)' == '' AND '$(HostArch)' == 'Arm'">arm</ArchGroup>
+    <ArchGroup Condition="'$(ArchGroup)' == '' AND '$(HostArch)' == 'Arm64'">arm64</ArchGroup>
+    <ArchGroup Condition="'$(ArchGroup)' == ''">x64</ArchGroup>
 
     <!-- Initialize BuildConfiguration from the individual properties if it wasn't already explicitly set -->
     <BuildConfiguration Condition="'$(BuildConfiguration)' == ''">$(TargetGroup)-$(OSGroup)-$(ConfigurationGroup)-$(ArchGroup)</BuildConfiguration>
@@ -133,9 +135,9 @@
     <_runtimeOS Condition="'$(_runtimeOS)' == 'tizen.4.0.0'">linux</_runtimeOS>
     <_runtimeOS Condition="'$(_runtimeOS)' == 'tizen.5.0.0'">linux</_runtimeOS>
     <_runtimeOS Condition="'$(PortableBuild)' == 'true'">$(_portableOS)</_runtimeOS>
-    <ToolRuntimeRID>$(_runtimeOS)-$(HostArch)</ToolRuntimeRID>
+    <ToolRuntimeRID>$(_runtimeOS)-x64</ToolRuntimeRID>
     <!-- We build linux-musl-arm on a ubuntu container, so we can't use the toolset build for alpine runtime. We need to use portable linux RID for our toolset in order to be able to use it. -->
-    <ToolRuntimeRID Condition="'$(_runtimeOS)' == 'linux-musl' AND $(ArchGroup.StartsWith('arm')) AND !$(HostArch.StartsWith('arm'))">linux-x64</ToolRuntimeRID>
+    <ToolRuntimeRID Condition="'$(_runtimeOS)' == 'linux-musl' AND $(ArchGroup.StartsWith('arm')) AND !$(HostArch.StartsWith('Arm'))">linux-x64</ToolRuntimeRID>
 
     <!-- There are no WebAssembly tools, so treat them as Windows -->
     <ToolRuntimeRID Condition="'$(RuntimeOS)' == 'WebAssembly'">win-x64</ToolRuntimeRID>