How to pass a class by (const) reference to C++

[Jan]

On Wednesday, 15 December 2021 at 12:36:49 UTC, evilrat wrote:
> You probably know this but just in case - unlike C++ in D 
> variables by default have thread local storage, to link with 
> C++ global variable you need to use __gshared storage modifier 
> in D, it is similar to 'shared' variable that unlike 'shared' 
> tells the compiler "I know how to synchronize it myself".
>
> ```d
> module a;
>
> struct Foo {}
>
> extern(C++)
> __gshared Foo globalFoo;
> ```

Yeah, did that. As I said the mangled name that DMD chose is 
correct.

As I was told linking against functions in DLLs works perfectly, 
because it is identical to static linking. Linking against 
global/static variables supposedly differs and that's not handled 
correctly for DLLs. As I said, I talked to someone who worked on 
fixing lots of those issues a while ago and he immediately knew 
about this limitation.