From: daz <dooby@...10.karoo.co.uk>
Date: 2004-06-17T11:38:23+09:00
Subject: Re: Extension which depends on another extension


Jeff Mitchell wrote:
>
> I have two extensions, ext_x.so and ext_y.so.  ext_y.so references a
> few functions defined in ext_x.so.
>
> On Linux this is okay; both build, link, and run fine.  But on
> Windows, gcc-mingw32 will not let me create ext_y.so, as it complains
> about the undefined symbols which reside in ext_x.so.
>
> In the bigger picture, the Windows build is going to look
> totally different than the unix build.  If I could link with something
> like --ignore-undefined that would be great, however I haven't found
> such an option.
>
> Is there something I'm missing, or is it really going to be this hard?
> ext_x.so should remain independent.  As a last resort, I suppose I
> could combine the two extensions into one, but that would be pretty
> messy.  In fact, I have three other extensions which require ext_x.so.
>

You have to link ext_y.so with the dynamic lib file for ext_x.so which
will be a list of offsets to where the functions reside in ext_x.so .

If you're not actually using those functions in ext_x, maybe you could:

 #ifdef _win32_  // or whatever it is for gcc :-)
 #endif

.... around them.  Or include dummy functions inside "#ifdef"s ??
(which is what Nobu just suggested, IIUC)

I use Borland C and talk rubbish, so don't take too much notice :-)


daz