Enabled source-building with mono runtime on any architecture.

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

@@ -11,6 +11,7 @@ usage() {
     echo "  --run-smoke-test                   don't build; run smoke tests"
     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-mono-runtime                 output uses the mono runtime"
     echo "use -- to send the remaining arguments to MSBuild"
     echo ""
 }
@@ -65,6 +66,9 @@ while :; do
             fi
             shift
             ;;
+        --use-mono-runtime)
+            MSBUILD_ARGUMENTS+=( "/p:SourceBuildUseMonoRuntime=true" )
+            ;;
         --)
             shift
             echo "Detected '--': passing remaining parameters '$@' as build.sh arguments."

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>

src/SourceBuild/tarball/patches/aspnetcore/0002-source-build-support-building-with-mono-runtime.patch

@@ -0,0 +1,24 @@
+From bdad8007363d3cd6409de7994de21b0f0670b90c Mon Sep 17 00:00:00 2001
+From: Tom Deseyn <tom.deseyn@gmail.com>
+Date: Wed, 19 Oct 2022 13:01:12 +0200
+Subject: [PATCH] source-build: support building with mono runtime.
+
+---
+ eng/SourceBuild.props | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/eng/SourceBuild.props b/eng/SourceBuild.props
+index 32108e1f..3dfbd5ef 100644
+--- a/eng/SourceBuild.props
++++ b/eng/SourceBuild.props
+@@ -55,6 +55,7 @@
+
+     <PropertyGroup>
+       <InnerBuildArgs>$(InnerBuildArgs) /p:SourceBuildRuntimeIdentifier=$(TargetRuntimeIdentifier)</InnerBuildArgs>
++      <InnerBuildArgs Condition="'$(SourceBuildUseMonoRuntime)' == 'true'">$(InnerBuildArgs) /p:CrossgenOutput=false</InnerBuildArgs>
+     </PropertyGroup>
+   </Target>
+
+-- 
+2.37.3
+

src/SourceBuild/tarball/patches/runtime/0001-source-build-support-building-with-mono-runtime.patch

@@ -0,0 +1,24 @@
+From c562789d1ad0cab0e924c49c3df16974c81099b9 Mon Sep 17 00:00:00 2001
+From: Tom Deseyn <tom.deseyn@gmail.com>
+Date: Wed, 19 Oct 2022 13:00:50 +0200
+Subject: [PATCH] source-build: support building with mono runtime.
+
+---
+ eng/SourceBuild.props | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/eng/SourceBuild.props b/eng/SourceBuild.props
+index c197d8afd..55c1c1d22 100644
+--- a/eng/SourceBuild.props
++++ b/eng/SourceBuild.props
+@@ -41,6 +41,7 @@
+       <InnerBuildArgs>$(InnerBuildArgs) /p:EnableNgenOptimization=false</InnerBuildArgs>
+       <InnerBuildArgs>$(InnerBuildArgs) /p:EnablePackageValidation=false</InnerBuildArgs>
+       <InnerBuildArgs>$(InnerBuildArgs) /p:DisableSourceLink=false</InnerBuildArgs>
++      <InnerBuildArgs Condition="'$(SourceBuildUseMonoRuntime)' == 'true'">$(InnerBuildArgs) /p:PrimaryRuntimeFlavor=Mono /p:RuntimeFlavor=Mono</InnerBuildArgs>
+     </PropertyGroup>
+   </Target>
+
+-- 
+2.37.3
+