From 2fbb7eb1ba014de7200e39f048d1ea74a39f0b61 Mon Sep 17 00:00:00 2001
From: Jo Shields <directhex@apebox.org>
Date: Mon, 3 Jul 2023 17:53:34 -0400
Subject: [PATCH] Try adding cross-compilers for Musl (#87841)

* Add cross-compilers for Musl

* Fix LLVM linkage on Musl
---
 eng/Version.Details.xml            | 16 ++++++++++++++++
 eng/Versions.props                 |  4 ++++
 eng/pipelines/runtime-official.yml |  2 ++
 eng/pipelines/runtime.yml          |  2 ++
 src/mono/llvm/llvm-init.proj       |  3 +++
 src/mono/monoaotcross.proj         |  4 +++-
 6 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 3ca5d77..381f93e 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -246,6 +246,14 @@
       <Uri>https://github.com/dotnet/llvm-project</Uri>
       <Sha>bd3acea90cae502d9a62164b863708d57d7993bc</Sha>
     </Dependency>
+    <Dependency Name="runtime.linux-musl-arm64.Microsoft.NETCore.Runtime.Mono.LLVM.Sdk" Version="16.0.5-alpha.1.23330.2">
+      <Uri>https://github.com/dotnet/llvm-project</Uri>
+      <Sha>bd3acea90cae502d9a62164b863708d57d7993bc</Sha>
+    </Dependency>
+    <Dependency Name="runtime.linux-musl-arm64.Microsoft.NETCore.Runtime.Mono.LLVM.Tools" Version="16.0.5-alpha.1.23330.2">
+      <Uri>https://github.com/dotnet/llvm-project</Uri>
+      <Sha>bd3acea90cae502d9a62164b863708d57d7993bc</Sha>
+    </Dependency>
     <Dependency Name="runtime.linux-x64.Microsoft.NETCore.Runtime.Mono.LLVM.Sdk" Version="16.0.5-alpha.1.23330.2">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
       <Sha>bd3acea90cae502d9a62164b863708d57d7993bc</Sha>
@@ -254,6 +262,14 @@
       <Uri>https://github.com/dotnet/llvm-project</Uri>
       <Sha>bd3acea90cae502d9a62164b863708d57d7993bc</Sha>
     </Dependency>
+    <Dependency Name="runtime.linux-musl-x64.Microsoft.NETCore.Runtime.Mono.LLVM.Sdk" Version="16.0.5-alpha.1.23330.2">
+      <Uri>https://github.com/dotnet/llvm-project</Uri>
+      <Sha>bd3acea90cae502d9a62164b863708d57d7993bc</Sha>
+    </Dependency>
+    <Dependency Name="runtime.linux-musl-x64.Microsoft.NETCore.Runtime.Mono.LLVM.Tools" Version="16.0.5-alpha.1.23330.2">
+      <Uri>https://github.com/dotnet/llvm-project</Uri>
+      <Sha>bd3acea90cae502d9a62164b863708d57d7993bc</Sha>
+    </Dependency>
     <Dependency Name="runtime.win-x64.Microsoft.NETCore.Runtime.Mono.LLVM.Sdk" Version="16.0.5-alpha.1.23330.2">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
       <Sha>bd3acea90cae502d9a62164b863708d57d7993bc</Sha>
diff --git a/eng/Versions.props b/eng/Versions.props
index 95ca08c..40bccdb 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -219,8 +219,12 @@
     <!-- Mono LLVM -->
     <runtimelinuxarm64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion>16.0.5-alpha.1.23330.2</runtimelinuxarm64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion>
     <runtimelinuxarm64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion>16.0.5-alpha.1.23330.2</runtimelinuxarm64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion>
+    <runtimelinuxmuslarm64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion>16.0.5-alpha.1.23330.2</runtimelinuxmuslarm64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion>
+    <runtimelinuxmuslarm64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion>16.0.5-alpha.1.23330.2</runtimelinuxmuslarm64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion>
     <runtimelinuxx64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion>16.0.5-alpha.1.23330.2</runtimelinuxx64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion>
     <runtimelinuxx64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion>16.0.5-alpha.1.23330.2</runtimelinuxx64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion>
+    <runtimelinuxmuslx64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion>16.0.5-alpha.1.23330.2</runtimelinuxmuslx64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion>
+    <runtimelinuxmuslx64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion>16.0.5-alpha.1.23330.2</runtimelinuxmuslx64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion>
     <runtimewinx64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion>16.0.5-alpha.1.23330.2</runtimewinx64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion>
     <runtimewinx64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion>16.0.5-alpha.1.23330.2</runtimewinx64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion>
     <runtimeosxarm64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion>16.0.5-alpha.1.23330.2</runtimeosxarm64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion>
diff --git a/eng/pipelines/runtime-official.yml b/eng/pipelines/runtime-official.yml
index 3e3d343..293f5d4 100644
--- a/eng/pipelines/runtime-official.yml
+++ b/eng/pipelines/runtime-official.yml
@@ -221,6 +221,7 @@ extends:
           buildConfig: release
           platforms:
           - linux_x64
+          - linux_musl_x64
           jobParameters:
             buildArgs: -s mono+packs -c $(_BuildConfig)
                       /p:MonoCrossAOTTargetOS=android+browser /p:SkipMonoCrossJitConfigure=true /p:BuildMonoAOTCrossCompilerOnly=true
@@ -244,6 +245,7 @@ extends:
           buildConfig: release
           platforms:
           - linux_arm64
+          - linux_musl_arm64
           jobParameters:
             buildArgs: -s mono+packs -c $(_BuildConfig)
                        /p:MonoCrossAOTTargetOS=browser /p:SkipMonoCrossJitConfigure=true /p:BuildMonoAOTCrossCompilerOnly=true
diff --git a/eng/pipelines/runtime.yml b/eng/pipelines/runtime.yml
index b97d380..a42a26b 100644
--- a/eng/pipelines/runtime.yml
+++ b/eng/pipelines/runtime.yml
@@ -731,6 +731,7 @@ extends:
           buildConfig: release
           platforms:
           - linux_x64
+          - linux_musl_x64
           # - linux_arm64
           # - linux_musl_arm64
           - windows_x64
@@ -784,6 +785,7 @@ extends:
           buildConfig: release
           platforms:
           - linux_arm64
+          - linux_musl_arm64
           - osx_arm64
           jobParameters:
             runtimeVariant: crossaot
diff --git a/src/mono/llvm/llvm-init.proj b/src/mono/llvm/llvm-init.proj
index 781b758..f4ab585 100644
--- a/src/mono/llvm/llvm-init.proj
+++ b/src/mono/llvm/llvm-init.proj
@@ -4,10 +4,13 @@
     <MonoLLVMHostOS Condition="'$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::Linux)))' == 'true'">linux</MonoLLVMHostOS>
     <MonoLLVMHostOS Condition="'$([System.Runtime.InteropServices.RuntimeInformation]::IsOSPlatform($([System.Runtime.InteropServices.OSPlatform]::OSX)))' == 'true'">osx</MonoLLVMHostOS>
     <MonoLLVMHostOS Condition="'$(OS)' == 'Windows_NT'">win</MonoLLVMHostOS>
+    <MonoLLVMHostOS Condition="Exists('$(ROOTFS_DIR)/lib/ld-musl-aarch64.so.1') or Exists('$(ROOTFS_DIR)/lib/ld-musl-x86_64.so.1')">linux-musl</MonoLLVMHostOS>
     <MonoLLVMSDKVersion Condition="'$(MonoLLVMHostOS)' == 'linux'">$(runtimelinuxx64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion)</MonoLLVMSDKVersion>
+    <MonoLLVMSDKVersion Condition="'$(MonoLLVMHostOS)' == 'linux-musl'">$(runtimelinuxmuslx64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion)</MonoLLVMSDKVersion>
     <MonoLLVMSDKVersion Condition="'$(MonoLLVMHostOS)' == 'win'">$(runtimewinx64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion)</MonoLLVMSDKVersion>
     <MonoLLVMSDKVersion Condition="'$(MonoLLVMHostOS)' == 'osx'">$(runtimeosxx64MicrosoftNETCoreRuntimeMonoLLVMSdkVersion)</MonoLLVMSDKVersion>
     <MonoLLVMToolsVersion Condition="'$(MonoLLVMHostOS)' == 'linux'">$(runtimelinuxx64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion)</MonoLLVMToolsVersion>
+    <MonoLLVMToolsVersion Condition="'$(MonoLLVMHostOS)' == 'linux-musl'">$(runtimelinuxmuslx64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion)</MonoLLVMToolsVersion>
     <MonoLLVMToolsVersion Condition="'$(MonoLLVMHostOS)' == 'win'">$(runtimewinx64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion)</MonoLLVMToolsVersion>
     <MonoLLVMToolsVersion Condition="'$(MonoLLVMHostOS)' == 'osx'">$(runtimeosxx64MicrosoftNETCoreRuntimeMonoLLVMToolsVersion)</MonoLLVMToolsVersion>
   </PropertyGroup>
diff --git a/src/mono/monoaotcross.proj b/src/mono/monoaotcross.proj
index 22f402d..52648d9 100644
--- a/src/mono/monoaotcross.proj
+++ b/src/mono/monoaotcross.proj
@@ -34,6 +34,8 @@
     <PropertyGroup>
       <MonoAotTargetOS>$(MonoAotTargetRid.Substring(0,$(MonoAotTargetRid.LastIndexOf('-'))))</MonoAotTargetOS>
       <MonoAotTargetArchitecture>$(MonoAotTargetRid.Substring($([MSBuild]::Add(1, $(MonoAotTargetRid.LastIndexOf('-'))))))</MonoAotTargetArchitecture>
+      <MonoAotHostOS>$(TargetOS)</MonoAotHostOS>
+      <MonoAotHostOS Condition="'$(TargetsLinuxMusl)' == 'true'">linux-musl</MonoAotHostOS>
     </PropertyGroup>
 
     <MSBuild Targets="Build"
@@ -42,7 +44,7 @@
 
     <MSBuild Targets="BuildMono"
              Projects="$(MSBuildThisFileDirectory)mono.proj"
-             Properties="AotHostOS=$(TargetOS);AotHostArchitecture=$(TargetArchitecture);BuildMonoAOTCrossCompilerOnly=true;SkipMonoCrossJitConfigure=$(SkipMonoCrossJitConfigure);TargetArchitecture=$(MonoAotTargetArchitecture);TargetOS=$(MonoAotTargetOS)" />
+             Properties="AotHostOS=$(MonoAotHostOS);AotHostArchitecture=$(TargetArchitecture);BuildMonoAOTCrossCompilerOnly=true;SkipMonoCrossJitConfigure=$(SkipMonoCrossJitConfigure);TargetArchitecture=$(MonoAotTargetArchitecture);TargetOS=$(MonoAotTargetOS)" />
 
     <ItemGroup>
       <_MonoAOTCrossFiles Include="$(ArtifactsBinDir)mono\$(MonoAotTargetOS).$(MonoAotTargetArchitecture).$(Configuration)\cross\$(MonoAotTargetRid.ToLower())\**" />
-- 
2.7.4