[Issue 18894] New: extern(C++) interfaces + OSX

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18894

          Issue ID: 18894
           Summary: extern(C++) interfaces + OSX
           Product: D
           Version: D2
          Hardware: All
                OS: Mac OS X
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: aliloko at gmail.com

Not sure if this is known, on macOS to get C++ ABI compatibility with a pure
virtual class it seems you need to add an additional dummy call.
This is not required on Windows.


extern(C++) interface MyCPPCInterface
{

    // Simulate C++ destructor so that the v-table layout is the same
    void destroyThis();

    // required not to crash...
    version (OSX) void unknownCall(); // THIS IS SURPRISING


    void otherMethod1();


   [ Other methods... ]
}

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