在 2025-03-02 23:31, Alvin Wong via Mingw-w64-public 写道:
Honestly I've never thought about this before, so I just gave it a check on MSVC. Testing with the version I have installed (19.35.32215), by comparing the output of `cl /PD /Zc:preprocessor test.cpp` and `cl /PD /Zc:preprocessor /guard:cf test.cpp`. To my surprise (or maybe I shouldn't have been surprised?), the output of the latter command has an additional `#define _CONTROL_FLOW_GUARD 1`. It seems to me that LLVM/Clang does not implement this behaviour, even in MSVC mode. We might need to request this to be implemented upstream.Regardless, mingw-w64 will need to support versions of LLVM without this preprocessor. Also, I'm not sure if this preprocessor would even apply to assembly files.
Ideally there should always be a load config directory. If it is compiled into libmingwex then it's not possible to turn it on or off at their disposal.
-- Best regards, LIU Hao
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