https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64384

Jay <jay.krell at cornell dot edu> changed:

           What    |Removed                     |Added
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                 CC|                            |jay.krell at cornell dot edu

--- Comment #6 from Jay <jay.krell at cornell dot edu> ---
This is probably a bug in Visual C++ when compiling as C.
Or rather, whatever is/was correct, C and C++ should have matched.
At this point, one must be considered correct, the other incorrect, and neither
changable.

Since most "COM" programming is done with C++, given no good choice here, the
C++ behavior should be considered "correct", and either g++ but not gcc, or 
g++ and gcc should follow it. Certainly, at least, g++ should follow Visual C++
C++ behavior.

Consider warning.

Really there is no perfect fix here.

The relatively few C programmers using COM, will have to write a little bit of
C++ to interface correctly with such rare functions.

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