use vswhere

Author: Steve Lee (POWERSHELL HE/HIM) (from Dev Box)

.pipelines/DSC-Official.yml

@@ -125,6 +125,11 @@ extends:
         - pwsh: |
             Set-Location "$(Build.SourcesDirectory)/DSC"
             write-verbose -verbose (dir "$($env:PROGRAMFILES)\Microsoft Visual Studio\2022\Enterprise" -r clang.exe | out-string)
+            $VSINSTALLDIR = $(vswhere.exe -latest -requires Microsoft.VisualStudio.Component.VC.Llvm.Clang -property installationPath)
+            $VCINSTALLDIR = Join-Path $VSINSTALLDIR "VC"
+            $LLVM_ROOT = Join-Path $VCINSTALLDIR "Tools\Llvm\x64"
+            $Env:PATH += ";$LLVM_ROOT\bin"
+            write-verbose -verbose (gcm clang.exe | out-string)
             ./build.ps1 -Release -Architecture $(buildName) -SkipLinkCheck
           displayName: 'Build $(buildName)'
           env: