Using DLL

[torhu]

Zarathustra wrote:
> I created lib file:
> implib /s zlib.lib zlib.dll
> and:
> zlib.d
> but when I tryed compile:
> dmd main.d zlib.d zlib.lib
> in main.d is import zlib.d
> I got some errors:
>  main.obj(main)
>  Error 42: Symbol Undefined _D4zlib10deflateEndFPS4zlib8z_streamZi
> main.obj(main)
>  Error 42: Symbol Undefined _D4zlib7deflateFPS4zlib8z_streamiZi
> main.obj(main)
>  Error 42: Symbol Undefined _D4zlib10inflateEndFPS4zlib8z_streamZi
> main.obj(main)
>  Error 42: Symbol Undefined _D4zlib7inflateFPS4zlib8z_streamiZi
> zlib.obj(zlib)
>  Error 42: Symbol Undefined _D4zlib13deflateInit2_FPS4zlib8z_streamiiiiiPaiZi
> zlib.obj(zlib)
>  Error 42: Symbol Undefined _D4zlib13inflateInit2_FPS4zlib8z_streamiPaiZi
> zlib.obj(zlib)
>  Error 42: Symbol Undefined _D4zlib16inflateBackInit_FPS4zlib8z_streamiPhPaiZi
> zlib.obj(zlib)
>  Error 42: Symbol Undefined _D4zlib12inflateInit_FPS4zlib8z_streamPaiZi
> zlib.obj(zlib)
>  Error 42: Symbol Undefined _D4zlib12deflateInit_FPS4zlib8z_streamiPaiZi
> --- errorlevel 9
> 
> I don't know what is wrong, that zlib isn't linked.
> 

If zlib.d contains prototypes of the C functions, you have to declare 
them 'extern (C)'.  Try putting 'extern (C):' at the top of the file.

Phobos includes bindings for zlib, you could try those instead.  I don't 
know what you need to do to use them, though.