[clang] [clang] Add /Zc:__STDC__ flag to clang-cl (PR #68690)

[via cfe-commits]

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@@ -8065,6 +8069,9 @@ void Clang::AddClangCLArgs(const ArgList &Args, types::ID InputType,
    CmdArgs.push_back("-fno-wchar");
  }
 
+ if (!types::isCXX(InputType) && Args.hasArg(options::OPT_fms_define_stdc))
+   CmdArgs.push_back("-fms-define-stdc");
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xbjfk wrote:

Sounds good to me, thanks. 

https://github.com/llvm/llvm-project/pull/68690