Re: [Boost-build] linking with msvc cannot find .lib

From: Andrej van der Zee (mavdzee_at_[hidden])
Date: 2008-06-06 10:17:54

Hi Jurko,

You were right, there are no symbols in the dll. I got
it working now with the __declspec(dllexport).

Thanks a lot for your patience...

Cheers,
Andrej

--- Jurko Gospodnetić <jurko.gospodnetic_at_[hidden]>
wrote:

>    Hi Andrej.
> 
> > So it seems that when I build my libraries the
> .lib
> > import libraries are not created somehow, but the
> > corresponding .dll files are. When I link the
> > executable it looks for the import library and
> cannot
> > find it obviously. Therefor I have some new
> (obvious)
> > questions:
> > 
> > * Why is speedo_handlers.lib not build?
> 
>    I have no idea. So your google is as good as my
> google. :-)
> 
> 
> > * Is it possible to link to the
> speedo_hanedlers.dll
> > directly instead of speedo_handlers.lib? Or is
> this
> > silly?
> 
>    Well.. you can link to it from code... by using 
> LoadLibrary()/GetProcAddress()/FreeLibrary() or
> similar APIs... by I'm 
> guessing that is not the way you want to go...
> 
>    Another way is to construct the import library
> separately, e.g. by 
> defining a .def file containing a list of all the
> files exported from 
> the DLL and then using the implib utility or
> something similar.
> 
>    But the cleanest solution I see is discovering
> why your compiler is 
> not generating the import library in the first place
> and making it do 
> so. Nothing else will be portable between Linux &
> Windows.
> 
>    My first guess now after looking at Microsoft's
> help for the link.exe 
> /IMPLIB option is that you do not have any functions
> exported from your DLL.
> 
>    In order for them to be exported you need to use
> one of the following:
>    - The __declspec(dllexport) keyword in the source
> code
>    - EXPORTS statement in a .def file
>    - An /EXPORT specification in a LINK command
> 
>    Try using the dependency walker (depends.exe)
> utility on your dll and 
> if it sees any functions as exported from the DLL
> you built.
> 
>    I guess the cygwin/GNU nm utility should be able
> to do the same.
> 
>    Hope this helps.
> 
>    Best regards,
>      Jurko Gospodnetić
> 
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