Wrapping 64bit DLLs

[tomspilman]

So when trying to wrap a 64bit DLL the generator made the wrapper like this:

        [StructLayout(LayoutKind.Explicit, Size = 4)]
        public struct Internal
        {
           ...
        }

        int CppSharp.Runtime.ICppMarshal.NativeDataSize
        {
            get { return 4; }
        }

        public MyClass()
        {
            __Instance = Marshal.AllocHGlobal(4);
            Internal.MyClass_0(__Instance);
        }

Causing memory corruption when calling the 64bit library. Manually replacing all the '4's with '8's fixed it.

How do I define for my ILibrary that my DLL is 64bit?

[tritao]

You need to change the Clang target, IIRC the compiled builds use "i686-pc-win32" by default. Try with "x86_64-pc-win64" if you want to target the MSVC-like 64-bit subset or replace with "mingw32" or "mingw64" for MinGW toolset.

Let me know if it works, we should improve the documentation on this point.

[tomspilman]

So it looks like adding the following to my ILibrary...

options.TargetTriple = "x86_64";

... is enough and it figures out the rest. I can verify that sizeof(MyClass) in C++ matches what the wrapper generates.

Thanks!