hans added a comment.

> If we're all using `clang` for the command, we'd all get the same behavior, 
> right? There's no expectation that `clang` and `cl` behave the same way, 
> that's what `clang-cl` is for. I guess I don't see why we care about how MSVC 
> behaves unless passing `-fms-compatibility` or using `clang-cl` as the driver 
> and so I don't see why MSVC should dictate our behavior. (e.g., using clang 
> and libc++ on Windows because the programmer doesn't want to use MSVC at all 
> [except for the C runtime, I suppose] is something I believe we want to 
> support, and with such a use case, defaulting to what MSVC defaults to seems 
> surprising to me without other motivation.)

Okay, should we key this off the driver mode then (clang-cl vs clang), or on 
the `-fms-compatibility` version?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D131465/new/

https://reviews.llvm.org/D131465

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