Re: [sigc] Linking dynamically with SigC++

[Ulrich Eckhardt <eckhardt satorlaser com>]

Note up front: please say if you want to be CC'ed, I didn't do so in my other 
reply and it seems you have missed that.

On Wednesday 05 July 2006 18:08, Magnus Lindberg wrote:
> Windows (MSVS.Net 2003).

That's VC7.1, in non-marketing speak.

> > > Does linking dynamically with SigC++ (if possible) entail that any
> > > special considerations must be made when using SigC++?
> >
> > The what?
>
> Then if it's rather complicated I might do something else, for example
> use Boost instead.

I haven't looked at the 2.x versions, but normally dynamic linking is possible 
and supported. On the other hand, if you are not using GTKmm, I don't think 
the difference between Boost.Signal and libsigC++ is that big.

> (I hope you don't mind my asking; perhaps I could attempt to modify
> the source/project settings to find out whether it's possible, but 
> I'd rather not because I'm somewhat short of time...)

Set the project-type (under the 'General' settings) to DLL and set two defines 
(in order to get the _declspec(dllexport) stuff working) - at least that's 
all it took with libsigC++ 1.x.

> I no longer need to know whether it's possible to link dynamically. The
> reason I wanted to know that had something to do with the LGPL license
> and someone thought we needed to link dynamically or otherwise publish
> object files or source code files.

That's true. LGPL requires that people are able to relink your executable with 
a modified version of the LGPLed code, so either you ship objectfiles or use 
dynamic linking. Or, of course, provide the source.

Uli

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