[libcxx-commits] [libcxx] [libc++][test] Enhance `ADDITIONAL_COMPILE_FLAGS` to work with MSVC (PR #74974)

[Nikolas Klauser via libcxx-commits]

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@@ -15,7 +15,7 @@
 // is not trivially copyable, however Clang will sometimes emit additional
 // errors while trying to instantiate the rest of std::atomic<T>.
 // We silence those to make the test more robust.
-// ADDITIONAL_COMPILE_FLAGS: -Xclang -verify-ignore-unexpected=error
+// ADDITIONAL_COMPILE_FLAGS(verify-support): -Xclang -verify-ignore-unexpected=error
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philnik777 wrote:

I'm somewhat surprised that you're running any `.verify.cpp` tests. I was always under the impression that they are basically useless for anybody but libc++. How exactly are they useful to you?

https://github.com/llvm/llvm-project/pull/74974