Update coreclr test doc to call out LibrariesConfiguration (dotnet#50002

)

Include build configuration in error message about missing artifacts

docs/workflow/testing/coreclr/unix-test-instructions.md

@@ -18,6 +18,12 @@ To build the tests on Unix:
 ./src/tests/build.sh
 ```
 
+By default, the test build uses Release as the libraries configuration. To use a different configuration, set the `LibrariesConfiguration` property to the desired configuration. For example:
+
+```
+./src/tests/build.sh /p:LibrariesConfiguration=Debug
+```
+
 Please note that this builds the Priority 0 tests. To build priority 1:
 
 ```sh

docs/workflow/testing/coreclr/windows-test-instructions.md

@@ -9,6 +9,12 @@ Building coreclr tests must be done using a specific script as follows:
 src\tests\build.cmd
 ```
 
+By default, the test build uses Release as the libraries configuration. To use a different configuration, set the `LibrariesConfiguration` property to the desired configuration. For example:
+
+```
+src\tests\build.cmd /p:LibrariesConfiguration=Debug
+```
+
 ## Building Precompiled Tests
 
 ```
@@ -106,4 +112,4 @@ If you wish to run the test under a debugger (e.g. [WinDbg](http://msdn.microsof
 
 ## Modifying a test
 
-If test changes are needed, make the change, and re-build the test project. This will binplace the binaries in the test binaries folder (e.g. `<repo_root>\artifacts\tests\coreclr\windows.x64.Checked\Exceptions\Finalization`). Then re-run the test following the instructions above.
+If test changes are needed, make the change, and re-build the test project. This will binplace the binaries in the test binaries folder (e.g. `<repo_root>\artifacts\tests\coreclr\windows.x64.Checked\Exceptions\Finalization`). Then re-run the test following the instructions above.

eng/liveBuilds.targets

@@ -48,8 +48,10 @@
   </PropertyGroup>
 
   <Target Name="ResolveRuntimeFilesFromLocalBuild">
-    <Error Condition="!Exists('$(CoreCLRArtifactsPath)') and '$(RuntimeFlavor)' == 'CoreCLR'" Text="The CoreCLR artifacts path does not exist '$(CoreCLRArtifactsPath)'. The 'clr' subset must be built before building this project." />
-    <Error Condition="!Exists('$(MonoArtifactsPath)') and '$(RuntimeFlavor)' == 'Mono'" Text="The Mono artifacts path does not exist '$(MonoArtifactsPath)'. The 'mono' subset must be built before building this project." />
+    <Error Condition="!Exists('$(CoreCLRArtifactsPath)') and '$(RuntimeFlavor)' == 'CoreCLR'"
+           Text="The CoreCLR artifacts path does not exist '$(CoreCLRArtifactsPath)'. The 'clr' subset must be built before building this project. Configuration: '$(CoreCLRConfiguration)'. To use a different configuration, specify the 'RuntimeConfiguration' property." />
+    <Error Condition="!Exists('$(MonoArtifactsPath)') and '$(RuntimeFlavor)' == 'Mono'"
+           Text="The Mono artifacts path does not exist '$(MonoArtifactsPath)'. The 'mono' subset must be built before building this project. Configuration: '$(MonoConfiguration)'. To use a different configuration, specify the 'RuntimeConfiguration' property." />
 
     <PropertyGroup Condition="'$(RuntimeFlavor)' == 'CoreCLR'">
       <CoreCLRArtifactsPath>$([MSBuild]::NormalizeDirectory('$(CoreCLRArtifactsPath)'))</CoreCLRArtifactsPath>
@@ -116,8 +118,10 @@
   </Target>
 
   <Target Name="EnsureLocalArtifactsExist">
-    <Error Condition="!Exists('$(LibrariesSharedFrameworkRefArtifactsPath)')" Text="The 'libs' subset must be built before building this project. Missing artifacts: $(LibrariesSharedFrameworkRefArtifactsPath)" />
-    <Error Condition="'$(IncludeOOBLibraries)' == 'true' and !Exists('$(LibrariesAllRefArtifactsPath)')" Text="The 'libs' subset must be built before building this project. Missing artifacts: $(LibrariesAllRefArtifactsPath)" />
+    <Error Condition="!Exists('$(LibrariesSharedFrameworkRefArtifactsPath)')"
+           Text="The 'libs' subset must be built before building this project. Missing artifacts: $(LibrariesSharedFrameworkRefArtifactsPath). Configuration: '$(LibrariesConfiguration)'. To use a different configuration, specify the 'LibrariesConfiguration' property." />
+    <Error Condition="'$(IncludeOOBLibraries)' == 'true' and !Exists('$(LibrariesAllRefArtifactsPath)')"
+           Text="The 'libs' subset must be built before building this project. Missing artifacts: $(LibrariesAllRefArtifactsPath). Configuration: '$(LibrariesConfiguration)'. To use a different configuration, specify the 'LibrariesConfiguration' property." />
   </Target>
 
   <!--
@@ -126,9 +130,12 @@
   -->
   <Target Name="EnsureLocalOSGroupConfigurationArchitectureSpecificArtifactsExist"
           Condition="'$(LibrariesTargetOSConfigurationArchitecture)' != '*'">
-    <Error Condition="!Exists('$(LibrariesSharedFrameworkBinArtifactsPath)')" Text="The 'libs' subset must be built before building this project. Missing artifacts: $(LibrariesSharedFrameworkBinArtifactsPath)" />
-    <Error Condition="'$(IncludeOOBLibraries)' == 'true' and !Exists('$(LibrariesAllBinArtifactsPath)')" Text="The 'libs' subset must be built before building this project. Missing artifacts: $(LibrariesAllBinArtifactsPath)" />
-    <Error Condition="!Exists('$(LibrariesNativeArtifactsPath)')" Text="The 'libs' subset must be built before building this project. Missing artifacts: $(LibrariesNativeArtifactsPath)" />
+    <Error Condition="!Exists('$(LibrariesSharedFrameworkBinArtifactsPath)')"
+           Text="The 'libs' subset must be built before building this project. Missing artifacts: $(LibrariesSharedFrameworkBinArtifactsPath). Configuration: '$(LibrariesConfiguration)'. To use a different configuration, specify the 'LibrariesConfiguration' property." />
+    <Error Condition="'$(IncludeOOBLibraries)' == 'true' and !Exists('$(LibrariesAllBinArtifactsPath)')"
+           Text="The 'libs' subset must be built before building this project. Missing artifacts: $(LibrariesAllBinArtifactsPath). Configuration: '$(LibrariesConfiguration)'. To use a different configuration, specify the 'LibrariesConfiguration' property." />
+    <Error Condition="!Exists('$(LibrariesNativeArtifactsPath)')"
+           Text="The 'libs' subset must be built before building this project. Missing artifacts: $(LibrariesNativeArtifactsPath). Configuration: '$(LibrariesConfiguration)'. To use a different configuration, specify the 'LibrariesConfiguration' property." />
   </Target>
 
   <Target Name="ResolveLibrariesFromLocalBuild"