what you really want to know is that can Squeak handle a C++ object correctly.
What I known is that there is not a binary standard which defines C++ object.
That's why M$ defined the COM standard. Name mangling is not the only reason
that C++ code can not be used together which were compiled by different
complier. The presentation of a C++ object is also different. It's really
regretable that Bjarne. Stroustrup has not given a standard for how to implement
a C++ object layout. I believe that the only way to use C++ via FFI is to do
like what COM do. Exports C functions from a DLL and manage C++ object by your
own.