Can't build runtime with recent SDK due to `IsTrimmable` errors

[MihaZupan]

Build fails with the IsTrimmable is not supported for the target framework. Consider multi-targeting to a supported framework to enable trimming, and set IsTrimmable only for the supported frameworks. error.

Build FAILED.

C:\Program Files\dotnet\sdk\8.0.100-rc.2.23422.11\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(90,5): error NETSDK1212: IsTrimmable is not supported for the target framework. Consider multi-targeting to a supported framework to enable trimming, and set IsTrimmable only for the supported frameworks. For example: [C:\MihaZupan\runtime\Build.proj]
C:\Program Files\dotnet\sdk\8.0.100-rc.2.23422.11\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(90,5): error NETSDK1212: <IsTrimmable Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">true</IsTrimmable> [C:\MihaZupan\runtime\Build.proj]
C:\Program Files\dotnet\sdk\8.0.100-rc.2.23422.11\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(90,5): error NETSDK1212: IsTrimmable is not supported for the target framework. Consider multi-targeting to a supported framework to enable trimming, and set IsTrimmable only for the supported frameworks. For example: [C:\MihaZupan\runtime\Build.proj]
C:\Program Files\dotnet\sdk\8.0.100-rc.2.23422.11\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(90,5): error NETSDK1212: <IsTrimmable Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">true</IsTrimmable> [C:\MihaZupan\runtime\Build.proj]
    0 Warning(s)
    2 Error(s)

cc: @sbomer @eerhardt

I see net6.0 mentioned in the message - will this problem potentially go away with #90880?

Tagging subscribers to this area: @dotnet/area-infrastructure-libraries
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Build fails with the IsTrimmable is not supported for the target framework. Consider multi-targeting to a supported framework to enable trimming, and set IsTrimmable only for the supported frameworks. error.

Build FAILED.

C:\Program Files\dotnet\sdk\8.0.100-rc.2.23422.11\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(90,5): error NETSDK1212: IsTrimmable is not supported for the target framework. Consider multi-targeting to a supported framework to enable trimming, and set IsTrimmable only for the supported frameworks. For example: [C:\MihaZupan\runtime\Build.proj]
C:\Program Files\dotnet\sdk\8.0.100-rc.2.23422.11\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(90,5): error NETSDK1212: <IsTrimmable Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">true</IsTrimmable> [C:\MihaZupan\runtime\Build.proj]
C:\Program Files\dotnet\sdk\8.0.100-rc.2.23422.11\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(90,5): error NETSDK1212: IsTrimmable is not supported for the target framework. Consider multi-targeting to a supported framework to enable trimming, and set IsTrimmable only for the supported frameworks. For example: [C:\MihaZupan\runtime\Build.proj]
C:\Program Files\dotnet\sdk\8.0.100-rc.2.23422.11\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(90,5): error NETSDK1212: <IsTrimmable Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">true</IsTrimmable> [C:\MihaZupan\runtime\Build.proj]
    0 Warning(s)
    2 Error(s)

cc: @sbomer @eerhardt

I see net6.0 mentioned in the message - will this problem potentially go away with #90880?

Author:	MihaZupan
Assignees:	-
Labels:	area-Infrastructure-libraries
Milestone:	-

[ViktorHofer]

cc @jkoritzinsky

Tagging subscribers to this area: @dotnet/runtime-infrastructure
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Build fails with the IsTrimmable is not supported for the target framework. Consider multi-targeting to a supported framework to enable trimming, and set IsTrimmable only for the supported frameworks. error.

Build FAILED.

C:\Program Files\dotnet\sdk\8.0.100-rc.2.23422.11\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(90,5): error NETSDK1212: IsTrimmable is not supported for the target framework. Consider multi-targeting to a supported framework to enable trimming, and set IsTrimmable only for the supported frameworks. For example: [C:\MihaZupan\runtime\Build.proj]
C:\Program Files\dotnet\sdk\8.0.100-rc.2.23422.11\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(90,5): error NETSDK1212: <IsTrimmable Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">true</IsTrimmable> [C:\MihaZupan\runtime\Build.proj]
C:\Program Files\dotnet\sdk\8.0.100-rc.2.23422.11\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(90,5): error NETSDK1212: IsTrimmable is not supported for the target framework. Consider multi-targeting to a supported framework to enable trimming, and set IsTrimmable only for the supported frameworks. For example: [C:\MihaZupan\runtime\Build.proj]
C:\Program Files\dotnet\sdk\8.0.100-rc.2.23422.11\Sdks\Microsoft.NET.Sdk\targets\Microsoft.NET.Sdk.FrameworkReferenceResolution.targets(90,5): error NETSDK1212: <IsTrimmable Condition="$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net6.0'))">true</IsTrimmable> [C:\MihaZupan\runtime\Build.proj]
    0 Warning(s)
    2 Error(s)

cc: @sbomer @eerhardt

I see net6.0 mentioned in the message - will this problem potentially go away with #90880?

Author:	MihaZupan
Assignees:	-
Labels:	area-Infrastructure, untriaged
Milestone:	-

[jkoritzinsky]

This is an issue with a new warning in the SDK. It should go away with #90880, but in the meantime, if you can get a binlog of the NuGet restore, you can figure out which project is having the failure. @sbomer would know more about how to easily trace this down without a binlog.

[sbomer]

dotnet/docs#36775 has more details about the breaking change. I'm curious why source-build hasn't reported the break since it looks like they updated to the RC1 SDK in dotnet/dotnet@a61d7e3. We might still need to fix this in .NET 8 though.

[sbomer]

I think we can close this as fixed by #90880. Pretty sure source-build is avoiding the issue because of source-build specific settings, such as having some analyzers disabled. Please re-open if this it's still a problem somewhere.