[Bug target/64384] mingw-w64: stdcall function returning an aggregate is incompatible with MS ABI

[mity at morous dot org]

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

--- Comment #4 from mity <mity at morous dot org> ---
Daniel, COM interface should be, by definition, language agnostic. COM can be
called from C++ as well as from C, and also COM object may be implemented in
C++ as well as C. This implies that (at least for stdcall, as COM uses stdcall
convention) there shouldn't be any difference between C and C++.