"The 'libs' subset must be built before building this project" when subset has been built

[kg]

Description

Attempting to build+run tests on Debian on a git checkout by following documentation but the libs subset is not being picked up after building.

I've run the following successfully:

PATH=~/cmake/bin:$PATH ./build.sh -subset clr+libs -runtimeconfiguration Debug
PATH=~/cmake/bin:$PATH ./build.sh -subset clr+libs -runtimeconfiguration Release

But any time I do PATH=~/cmake/bin:$PATH ./src/coreclr/build-test.sh I get errors about the libs subset:

Starting the Managed Tests Build...
Building step 'Managed tests build (build tests)' testGroupToBuild=1 via "/home/kate/Projects/runtime/eng/common/msbuild.sh"  --warnAsError false /home/kate/Projects/runtime/src/coreclr/tests/build.proj /p:RestoreDefaultOptimizationDataPackage=false /p:PortableBuild=true /p:UsePartialNGENOptimization=false /maxcpucount "/flp:Verbosity=normal;LogFile=/home/kate/Projects/runtime/artifacts/log/Tests_Managed.Linux.x64.Debug.log;Append=false" "/flp1:WarningsOnly;LogFile=/home/kate/Projects/runtime/artifacts/log/Tests_Managed.Linux.x64.Debug.wrn;Append=false" "/flp2:ErrorsOnly;LogFile=/home/kate/Projects/runtime/artifacts/log/Tests_Managed.Linux.x64.Debug.err;Append=false"  /p:TargetArchitecture=x64 /p:Configuration=Debug /p:TargetOS=Linux /nodeReuse:false     "/p:CopyNativeProjectBinaries=true" /p:__SkipPackageRestore=true
  Building Targeting Pack
  external -> 
/home/kate/Projects/runtime/eng/liveBuilds.targets(148,5): error : The 'libs' subset must be built before building this project. Missing artifacts: /home/kate/Projects/runtime/artifacts/bin/ref/microsoft.netcore.app/Release/ [/home/kate/Projects/runtime/src/coreclr/tests/src/Common/CoreCLRTestLibrary/CoreCLRTestLibrary.csproj]
/home/kate/Projects/runtime/eng/liveBuilds.targets(148,5): error : The 'libs' subset must be built before building this project. Missing artifacts: /home/kate/Projects/runtime/artifacts/bin/ref/microsoft.netcore.app/Release/ [/home/kate/Projects/runtime/src/coreclr/tests/src/CoreMangLib/system/environment/environment_version.csproj]
Attempting to cancel the build...

Build FAILED.

After messing around for a bit it seems like the solution is:

PATH=~/cmake/bin:$PATH ./build.sh -subset clr+libs -runtimeconfiguration Release -c Release

Because that got me past the 'subset must be built' error. But I didn't find this anywhere in the documentation on how to build so it seems like it shouldn't necessarily be required (or the docs are just outdated).

Configuration

Debian Buster (10), Intel x64
git commit 7debfe4

[ViktorHofer]

Based on the path in the error message I would say you need to build the libs subset in Release. We should probably refine the error message to include the required configuration.

PATH=~/cmake/bin:$PATH ./build.sh clr+libs -runtimeconfiguration Debug -c Release

or if you want to build everything in Release:

PATH=~/cmake/bin:$PATH ./build.sh clr+libs -c Release

[kg]

OK, that was the answer I arrived at. The docs should probably specify this since as-is none of the instructions for how to build the tests actually work - i.e. https://github.com/dotnet/runtime/blob/master/docs/workflow/building/coreclr/linux-instructions.md which doesn't ever mention needing to explicitly build in release configuration. Some of the other docs I looked at didn't mention this either.

[ViktorHofer]

cc @jashook @trylek