[clang] [clang-cl] Add cl compiler build deterministic options for compatibility. (PR #194779)

[Eli Friedman via cfe-commits]

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@@ -0,0 +1,36 @@
+// We have to run the compilation step to see the output, so we must be able to
+// target Windows.
+
+// REQUIRES: system-windows
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efriedma-quic wrote:

I'm not sure this is required?  clang-cl should always be built.  (And I'm not sure system-windows guarantees anything useful here.)

Maybe look at what other clang-cl driver tests do.

https://github.com/llvm/llvm-project/pull/194779