`ObjWriterRid` always defaults to `linux-$(Platform)` on Alpine Linux on non-portable build

[ayakael]

Description

ObjWriterRid should equal linux-musl-$(Platform) when building non-portable build. It always defaults to linux-$(Platform) despite setting /p:ObjWriterRid=linux-musl-$(Platform)

Reproduction Steps

Build with /p:TargetRid=alpine.3.16-x64

Expected behavior

Should pick-up runtime.linux-musl-x64.Microsoft.NETCore.Runtime.ObjWriter on building non-portable runtime.

Actual behavior

Picks up runtime.linux-x64.Microsoft.NETCore.Runtime.ObjWriter

Regression?

No response

Known Workarounds

While setting /p:ObjWriterRid=linux-musl-$(Platform) on build should work due to

runtime/src/coreclr/tools/aot/ILCompiler/ILCompiler.props

Line 38 in 4ff5a3a

<ObjWriterRid Condition="'$(ObjWriterRid)' == ''">$(ObjWriterRidWithoutPlatform)-$(ObjWriterRidPlatform)</ObjWriterRid>

...it is not picked up for some reason.

The following patch forces it:

From b2f5f8bdab0b921c224aa3611f311c6317897c3a Mon Sep 17 00:00:00 2001
From: "build@apk-groulx" <build@apk-groulx.praxis>
Date: Wed, 14 Sep 2022 19:59:07 +0000
Subject: [PATCH 1/1] fix-musl

---
 src/coreclr/tools/aot/ILCompiler/ILCompiler.props | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/coreclr/tools/aot/ILCompiler/ILCompiler.props b/src/coreclr/tools/aot/ILCompiler/ILCompiler.props
index 8c4fce52390..722eddc1adc 100644
--- a/src/coreclr/tools/aot/ILCompiler/ILCompiler.props
+++ b/src/coreclr/tools/aot/ILCompiler/ILCompiler.props
@@ -29,7 +29,7 @@
     <ObjWriterRidPlatform>$(RuntimeIdentifier.Substring($(_objWriterRidPlatformIndex)).TrimStart('-'))</ObjWriterRidPlatform>
 
     <!-- If it's not win/osx/linux-musl, it's a non-portable Linux. Treat as Linux. -->
-    <ObjWriterRidWithoutPlatform Condition="'$(ObjWriterRidWithoutPlatform)' != 'win' and '$(ObjWriterRidWithoutPlatform)' != 'osx' and '$(ObjWriterRidWithoutPlatform)' != 'linux-musl'">linux</ObjWriterRidWithoutPlatform>
+    <ObjWriterRidWithoutPlatform Condition="'$(ObjWriterRidWithoutPlatform)' != 'win' and '$(ObjWriterRidWithoutPlatform)' != 'osx' and '$(ObjWriterRidWithoutPlatform)' != 'linux-musl'">linux-musl</ObjWriterRidWithoutPlatform>
 
     <!-- OSX builds have a version -->
     <ObjWriterRidWithoutPlatform Condition="'$(ObjWriterRidWithoutPlatform)' == 'osx' and '$(ObjWriterRidPlatform)' == 'x64'">osx.10.12</ObjWriterRidWithoutPlatform>
-- 
2.37.1

Configuration

Build with commit hash 6d10e4c, as pulled by commit 8a0eb58a5a825e10ea2bf06a892dd441355818c8 of dotnet/installer's tarball.

Other information

No response

[steveisok]

@MichalStrehovsky are you the right person to look into this?

[jkotas]

For .NET 7, we do not plan to build native aot compiler as part of the source build. This should be addressed by #76206.

For .NET 8, there is a larger workitem to make native aot compiler source buildable that this is closely related to.

In the meantime, @ayakael Would you be interested in submitting a PR with a change that solves the problem for you without breaking the non-portable build for other people who care about it? I am not sure what that fix should be.

[tmds]

I think that in line with making runtime build using non-portable artifacts, we should produce a non-portable rid package for ObjWriter and consume that package in runtime.

[TIHan]

Resolved by #99733