[PATCH] D127641: [clang-cl][MSVC] Add default /Zc conformance arguments

[Stephen Long via Phabricator via cfe-commits]

steplong added reviewers: rnk, hans, thakis.
steplong added a comment.

I'm not sure how to check for `/std:` at this stage to turn on arguments like `/Zc:alignedNew`



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Comment at: clang/test/Driver/cl-zc.cpp:98
 // thread safe statics are off for versions < 19.
 // RUN: %clang_cl /c -### -fms-compatibility-version=18 -- %s 2>&1 | FileCheck -check-prefix=NoThreadSafeStatics %s
 // RUN: %clang_cl /Zc:threadSafeInit /Zc:threadSafeInit- /c -### -- %s 2>&1 | FileCheck -check-prefix=NoThreadSafeStatics %s
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This line will fail, but I can't find any documentation on thread safe statics being off for versions < 19. https://docs.microsoft.com/en-us/cpp/build/reference/zc-threadsafeinit-thread-safe-local-static-initialization?view=msvc-170 says Visual Studio 2015 implements this by default.


Repository:
  rG LLVM Github Monorepo

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