Bootstrap is failing on platform without AOT support

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#116,929 opened on Jun 23, 2025 10 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 38/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Stale
Tech stack: csharp
Domain: build-system

Research direction

Start with build.sh's --bootstrap flow and Build.proj, then trace how PublishSingleFile handles the bootstrap artifacts under artifacts/bootstrap/illumos-x64/host/. Reproduce the NETSDK1084 failure in the provided illumos cross-build and verify that --use-bootstrap completes on a platform without AOT support while using the bootstrapped single-file host.

Written by the indexing model from the issue text.

Description

area-Infrastructure

On platforms where AOT is not supported, --use-bootstrap fails with error like: https://github.com/dotnet/runtime/pull/105403#issuecomment-2994802484.

This is because PublishSingleFile is not respecting bootstrapped singlefile:

$ ls artifacts/bootstrap/illumos-x64/host/
apphost  singlefilehost

Repro:

$ git clone https://github.com/gwr/dotnet-runtime runtime --branch illumos5 --single-branch --depth 1
$ docker run --rm -v$(pwd)/runtime:/runtime -e ROOTFS_DIR=/crossrootfs/x64 \
    -it mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-22.04-cross-illumos

$ /runtime/build.sh clr+libs+packs -c Debug -os illumos -cross -gcc --bootstrap
...
Cleaning up artifacts from bootstrap build...
  Determining projects to restore...
  Tool 'coverlet.console' (version '6.0.4') was restored. Available commands: coverlet
  Tool 'dotnet-reportgenerator-globaltool' (version '5.4.3') was restored. Available commands: reportgenerator
  Tool 'microsoft.dotnet.xharness.cli' (version '10.0.0-prerelease.25255.1') was restored. Available commands: xharness
  Tool 'microsoft.visualstudio.slngen.tool' (version '12.0.15') was restored. Available commands: slngen
  
  Restore was successful.
  All projects are up-to-date for restore.
  Determining projects to restore...
/runtime/.dotnet/sdk/10.0.100-preview.6.25302.104/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(188,5): error NETSDK1084: There is no application host available for the specified RuntimeIdentifier 'illumos-x64'. [/runtime/Build.proj]
/runtime/.dotnet/sdk/10.0.100-preview.6.25302.104/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(188,5): error NETSDK1084: There is no application host available for the specified RuntimeIdentifier 'illumos-x64'. [/runtime/Build.proj]
/runtime/.dotnet/sdk/10.0.100-preview.6.25302.104/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(188,5): error NETSDK1084: There is no application host available for the specified RuntimeIdentifier 'illumos-x64'. [/runtime/Build.proj]
/runtime/.dotnet/sdk/10.0.100-preview.6.25302.104/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(188,5): error NETSDK1084: There is no application host available for the specified RuntimeIdentifier 'illumos-x64'. [/runtime/Build.proj]
/runtime/.dotnet/sdk/10.0.100-preview.6.25302.104/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(188,5): error NETSDK1084: There is no application host available for the specified RuntimeIdentifier 'illumos-x64'. [/runtime/Build.proj]
/runtime/.dotnet/sdk/10.0.100-preview.6.25302.104/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(188,5): error NETSDK1084: There is no application host available for the specified RuntimeIdentifier 'illumos-x64'. [/runtime/Build.proj]
/runtime/.dotnet/sdk/10.0.100-preview.6.25302.104/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(188,5): error NETSDK1084: There is no application host available for the specified RuntimeIdentifier 'illumos-x64'. [/runtime/Build.proj]
/runtime/.dotnet/sdk/10.0.100-preview.6.25302.104/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(188,5): error NETSDK1084: There is no application host available for the specified RuntimeIdentifier 'illumos-x64'. [/runtime/Build.proj]

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