Missing VS pre-req leads to non-obvious build error

[bwadswor]

Initial cost estimate: 2 days
Initial contacts: @trylek, @ViktorHofer

Description

Would be nice if missing dependencies were flagged clearly in the build.

Steps to Repro

1. starting with a clean machine, install all the pre-reqs except for VS2019. (i just failed to install it...)

https://github.com/dotnet/runtime/blob/master/docs/workflow/requirements/windows-requirements.md clearly lists VS as a pre-req.

2. clone
3. build.cmd
4. observe error, and scratch head trying to figure out why it didn't work cleanly..

Fragment of Output from build

Restore was successful.
All projects are up-to-date for restore.
Determining projects to restore...
All projects are up-to-date for restore.
System.Private.CoreLib -> D:\CoreCLR6\runtime\artifacts\bin\coreclr\windows.x64.Debug\IL\System.Private.CoreLib.dll
DIALib -> D:\CoreCLR6\runtime\artifacts\bin\DIALib\Debug\DIALib.dll
D:\CoreCLR6\runtime.dotnet\sdk\5.0.100\Microsoft.Common.CurrentVersion.targets(4818,5): error MSB3030: Could not copy the file "D:\DIA SDK\bin\amd64\msdia140.dll" because it was not found. [D:\CoreCLR6\runtime\src\coreclr\src\ToolBox\SOS\DacTableGen\DacTableGen.csproj]

Hopeful

It'd be nice if this dependency (and frankly all dependencies) were nicely flagged as missing during build.

I've listed this one here as I hit it... and now others will quickly find this via issue search and know what to do...

I dont really expect that we spend much effort fixing this.. but if someone wanted to take a few moments that also wouldn't be bad....

[Dotnet-GitSync-Bot]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[tommcdon]

@trylek

[ViktorHofer]

Most of the discussion about this happened in #39052. I think we can close this as a dup of the original issue the PR is trying to fix.