[Lemon-user] Question on compiling application that uses LEMON

[Pierre Moulon]

Under visual studio add:
LEMON_ONLY_TEMPLATES  into the preprocessor field.

If you using cmake based build you could add the following line directly
into your cmake
ADD_DEFINITIONS(-DLEMON_ONLY_TEMPLATES)

2012/8/1 Alpár Jüttner <alpar at cs.elte.hu>

> Hi,
>
> > I get a link error and would be most grateful for a tip to fix it
> > I use Visual Studio C++ 2010.  I believe all directories are specified
> > correctly to point to the correct folders containing LEMON libraries.
> > LEMON compiled without error.
> >
> > Issue has to do with the INVALID symbol in lemon:
> >
> > 1>CompareGpuToGraphCoverSpaceWorker.obj : error LNK2001: unresolved
> > external symbol "struct lemon::Invalid const
> > lemon::INVALID" (?INVALID at lemon@@3UInvalid at 1@B)
>
> You need to _link_ the lemon library to your code during the
> compilation. There are several alternative ways of doing it:
>
>       * Use the CMAKE build system for your projects. It is highly
>         recommended, for it is be very handy for larger project, and it
>         is a platform independent solution platform solution. See
>         http://lemon.cs.elte.hu/trac/lemon/wiki/HowToCompile for more
>         details.
>       * Build and install LEMON, then set the lemon library by hand to
>         the compiler. The library is named lemon.lib on Windows.
>       * INVALID is declared in lemon/base.cc. You can copy it to your
>         project and compile it along with your own files. Note that this
>         is quite cumbersome. The using CMAKE recommended above does
>         exactly the same but in a much more sophisticated and
>         comfortable way.
>       * It is possible to use LEMON as a header only library, then you
>         don't need to link it to lemon.lib. (At the cost that some parts
>         will such as the LP/MIP interface of the EPS export will not
>         work). For this you have to define LEMON_ONLY_TEMPLATES during
>         the compilation. Sorry, but I don't know how to do it with VS.
>         Using gcc it is done with the -DLEMON_ONLY_TEMPLATES compiler
>         switch.
>
> Regards,
> Alpar
>
> >
> > 1>C:\VSProjects\SPU\x64\Debug\SPU.exe : fatal error LNK1120: 1
> > unresolved externals
> >
> >
> >
> > Any recommendations?
> >
> >
> >
> > Thanks for the help.
> >
> >
> >
> > Best Regards,
> >
> >
> >
> > George Shannon
> >
> > PhD Candidate
> >
> >
> > _______________________________________________
> > Lemon-user mailing list
> > Lemon-user at lemon.cs.elte.hu
> > http://lemon.cs.elte.hu/mailman/listinfo/lemon-user
>
>
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>



-- 
Regards/Cordialement,
Pierre M
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