Re: Can't use _declspec(dllimport) in SWIG to import data from DLL

Pereira, Ricardo Scachetti wrote:

>         Hi, there.
>
>         I'm building a Java interface for some C++ classes I have (SWIG 
> 1.3.21 + Windows + Visual C++ 6.0). Those classes exist in a DLL. In 
> that DLL there is one global object that is being exported from the DLL as:
>
> class _declspec(dllexport) Log g_log();
>
>         It is imported by the clients of my DLL by the code:
>
> class _declspec(dllimport) Log g_log();
>
>         Neither line is accepted by SWIG. So I went ahead and put macros 
> defining both _declspecs and set them to blank in the SWIG interface file.
>
>         I could get away with the _declspec(dllexport) part, but without 
> the _declspec(dllimport) I can't get the SWIG dll to link. It can't find 
> the symbol "class Log g_log()".
>
>         In fact, by omitting the _declspec(dllimport), VC++ assumes that 
> is an export declaration so I can't get to tell the compiler to look for 
> that symbol in a dll.
>
>         As expected SWIG generates this:
>
> class Log g_log();
SWIG generates what you tell it to. How did you get SWIG to do this?

>         My current workaround is to manually change the c++ file 
> generated by SWIG to have this instead:
>
> class _declspec(dllimport) Log g_log();
>
>         Then all works fine.
>         Does anyone has a better idea to solve the problem?
>         Regards,

You add stuff into the wrapper file using %{ %}...

%{
class _declspec(dllimport) Log g_log();
%}

SWIG won't parse any of this and will merely copy it all into the wrapper file.

William
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