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

[Stephan T. Lavavej via libcxx-commits]

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@@ -13,7 +13,12 @@
 import subprocess
 import sys
 
-_isClang = lambda cfg: "__clang__" in compilerMacros(cfg) and "__apple_build_version__" not in compilerMacros(cfg)
+_isAnyClangOrGCC = lambda cfg: "__clang__" in compilerMacros(
+    cfg
+) or "__GNUC__" in compilerMacros(cfg)
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StephanTLavavej wrote:

Great idea, I've pushed a commit to do that. Note that I took a slightly different approach, introducing `_isAnyGCC` so that `_isAnyClangOrGCC`'s evaluation will be more efficient.

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