[vtkusers] CMake use either VTK 5.x or 6.0

[Bill Lorensen]

For the wiki examples themselves, I don't see harm in using all of the
libraries. For applications, using the modular features is probably best.



On Tue, Jun 25, 2013 at 11:19 AM, Marcus D. Hanwell <
marcus.hanwell at kitware.com> wrote:

> On Tue, Jun 25, 2013 at 10:39 AM, Shawn Waldon <swaldon at cs.unc.edu> wrote:
> > Hi all,
> >
> > I was reading over the build system migration guide
> > http://www.vtk.org/Wiki/VTK/Build_System_Migration
> > and I had a question.
> >
> > What if you have an application that you would like to support
> compilation
> > against either VTK 5 or 6?  How should you handle that in CMake?
>
> We were just talking about this in light of a recent report of linking
> issues. The current path taken in the VTK examples to support both is
> not ideal - it finds/links to every VTK library built if using VTK 6.
> >
> > Reason: I would like my application to be able to build on Ubuntu with
> the
> > version of vtk that you can get from apt-get install libvtk (Currently
> 5.8
> > and unlikely to update to 6.0 anytime soon as far as I know).  But when
> > building for Mac or Windows where I have to compile vtk anyway, I would
> like
> > to use the lastest version.
> >
> > I also like the idea of using only a subset of the vtk libraries as
> > dependencies as explained in the migration guide.
> >
> > If anyone can point me in the right direction I would appreciate it.
> >
> I will see if we can collect our thoughts and address this use case, I
> think it is important to still target the libraries you actually want
> to use from VTK when finding >=6. After all, modularization was
> supposed to make it easier to find/link to a subset rather than all of
> VTK! Some fo this is addressed in the page you link to (COMPONENTS,
> compiler definitions, VTK_LIBRARIES etc).
>
> Marcus
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