Enabled source-building with mono runtime on any architecture. (#14792)

* Enabled source-building with mono runtime on any architecture.

Adds an argument to the top-level build script to use the mono
runtime, and sets the flags needed for the different repos
to work with mono.

* Sync with sdk patch.

* Remove patches.

* PR feedback.

eng/SourceBuild.props

@@ -11,6 +11,7 @@
       <InnerBuildArgs>$(InnerBuildArgs) /p:IncludeNuGetPackageArchive=false</InnerBuildArgs>
       <InnerBuildArgs>$(InnerBuildArgs) /p:IncludeAdditionalSharedFrameworks=false</InnerBuildArgs>
       <InnerBuildArgs>$(InnerBuildArgs) /p:IncludeSharedFrameworksForBackwardsCompatibilityTests=false</InnerBuildArgs>
+      <InnerBuildArgs Condition="'$(SourceBuildUseMonoRuntime)' == 'true'">$(InnerBuildArgs) /p:DISABLE_CROSSGEN=true</InnerBuildArgs>
     </PropertyGroup>
   </Target>
 

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

@@ -24,6 +24,11 @@
 
     <UseStableVersions Condition="'$(UseStableVersions)' == ''">false</UseStableVersions>
 
+    <SourceBuildUseMonoRuntime>false</SourceBuildUseMonoRuntime>
+    <!-- These architectures are only supported with mono runtime -->
+    <SourceBuildUseMonoRuntime Condition="'$(BuildArchitecture)' == 's390x'">true</SourceBuildUseMonoRuntime>
+    <SourceBuildUseMonoRuntime Condition="'$(BuildArchitecture)' == 'ppc64le'">true</SourceBuildUseMonoRuntime>
+
     <!-- new supported portable/nonportable options.  These control whether to build portable runtime
          or portable SDK.  The PortableBuild flag is only set in runtime-portable.proj and should
          no longer be passed in.  -->

src/SourceBuild/tarball/content/build.sh

@@ -9,6 +9,7 @@ usage() {
     echo "  --online                           build using online sources"
     echo "  --poison                           build with poisoning checks"
     echo "  --run-smoke-test                   don't build; run smoke tests"
+    echo "  --use-mono-runtime                 output uses the mono runtime"
     echo "  --with-packages <dir>              use the specified directory of previously-built packages"
     echo "  --with-sdk <dir>                   use the SDK in the specified directory for bootstrapping"
     echo "use -- to send the remaining arguments to MSBuild"
@@ -45,6 +46,9 @@ while :; do
             runningSmokeTests=true
             MSBUILD_ARGUMENTS+=( "/t:RunSmokeTest" )
             ;;
+        --use-mono-runtime)
+            MSBUILD_ARGUMENTS+=( "/p:SourceBuildUseMonoRuntime=true" )
+            ;;
         --with-packages)
             CUSTOM_PACKAGES_DIR="$(cd -P "$2" && pwd)"
             if [ ! -d "$CUSTOM_PACKAGES_DIR" ]; then

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

@@ -143,6 +143,7 @@
     <StandardSourceBuildArgs>$(StandardSourceBuildArgs) /p:AdditionalSourceBuiltNupkgCacheDir="$(SourceBuiltPackagesPath)"</StandardSourceBuildArgs>
     <StandardSourceBuildArgs>$(StandardSourceBuildArgs) /p:ReferencePackageNupkgCacheDir="$(ReferencePackagesDir)"</StandardSourceBuildArgs>
     <StandardSourceBuildArgs>$(StandardSourceBuildArgs) /p:PreviouslySourceBuiltNupkgCacheDir="$(PrebuiltSourceBuiltPackagesPath)"</StandardSourceBuildArgs>
+    <StandardSourceBuildArgs>$(StandardSourceBuildArgs) /p:SourceBuildUseMonoRuntime=$(SourceBuildUseMonoRuntime)</StandardSourceBuildArgs>
 
     <StandardSourceBuildCommand>$(ProjectDirectory)\build$(ShellExtension)</StandardSourceBuildCommand>
   </PropertyGroup>