D and .lib files. C++/Other?

[Nicholas Wilson via Digitalmars-d-learn]

On Saturday, 1 July 2017 at 20:47:55 UTC, Damien Gibson wrote:
> Well I finally somehow got it to stop complaining about a bad 
> lib file, but now it wants to tell me the entry point for the 
> functions i list isnt correct, so now im just unsure if its 
> being stupid on me or im not writing something write on the D 
> or C++ end...
>
> The D code:
> _______________________________________________________________
> import std.stdio;
>
> export:
>
> void ConsoleWrite()
> {
> 	writeln("This is a test written in DLang/DMD!");
> }
>
> void ConsoleWait()
> {
> 	readln();
> }
> _______________________________________________________________
>
> i imported the stuff on CPP and tried to call it.. this is the 
> hpp file:
>
> myclass.hpp:
> _______________________________________________________________
> #pragma once
>
> #ifdef _MYDLL_EXPORTS
> 	#define DllAPI __declspec(dllexport)
> #else
> 	#define DllAPI __declspec(dllimport)
> #endif
>
> DllAPI void ConsoleWrite();
> DllAPI void ConsoleWait();
> _______________________________________________________________
>
> The errors:
>
> _______________________________________________________________
> 2 error LNK1120: 1 unresolved externals
> 1 error LNK2019: unresolved external symbol 
> "__declspec(dllimport) void __cdecl ConsoleWrite (void)" 
> (__imp_?ConsoleWrite at myclass@@SAXXZ) referenced in function 
> _wmain
> _______________________________________________________________

If you're wanting to use the names (e.g. "ConsoleWrite") as is on 
the C++ side them you need to declare them extern(C++) ( or 
extern(C)) on the D side. if you were to run whatever the 
equivalent of "nm my.dll | grep Console" on windows on the dll 
then you'd see the two symbols with a different name (i.e. not 
__imp_?ConsoleWrite at myclass@@SAXXZ).