[osg-users] OpenSceneGraph-3.5.9 developer release tagged

Jordi Torres jtorresfabra at gmail.com
Thu Nov 30 21:46:00 PST 2017

Hi Robert,

So just comenting the lines referring to those libraries in the
FindOpenCascade.cmake file did the trick. Also tested with a few igs files
and all worked ok.
So not sure for your opencascade version these libraries are needed to
build or/and run, but definitely not needed for me (installed from apt).

Could it be version dependent issues?


2017-11-30 21:30 GMT+01:00 Robert Osfield <robert.osfield at gmail.com>:

> Hi Jordi,
> On 30 November 2017 at 20:11, Jordi Torres <jtorresfabra at gmail.com> wrote:
> > No I don't have this dependency in my system, fresh build. In fact
> >
> > OPENCASCADE_TKDCAF is part from the package oce-draw, so CMake does not
> find
> > it automatically. But OPENCASCADE_TKVCAF is definitely not there.
> I don't understand the what specifically happening on your system, the
> FindOpenCascade script is long winded, I can only guess that some
> combination of dependencies on your system are causing an issue.
> > Can you tell me what packages do you have installed w.r.t opencascade?
> Maybe
> > a newer version?
> It's a year since I worked on the OpenCascade so I'm a bit rusty.
> Looking at where it's installed on my system it's in
> /usr/local/include/opencascade and /usr/local/lib so I probably
> installed from a local install/build rather than pulling it in from
> debian/ubuntu repositories.
> > BTW Is probable that we don't need all the libraries here:
> > https://github.com/openscenegraph/OpenSceneGraph/
> blob/master/CMakeModules/FindOpenCascade.cmake#L57-L112
> > to build the plugin.
> OpenCascade requires an massive number of separate libs to do even
> basic things with it, I tried to keep the number down as much as I
> possible could.  It was one of these tasks that at the start looked to
> be a straight forward but ended up a bit of nightmare to get things
> linking, lib after lib had to be added.
> I'm pretty sure we can't cut down the number of libs that are linked
> in.  Whether we can cut down the number of Find's I don't know.  It's
> a whole heap of stuff to iterate through to find out the minimum
> required.
> As to what is wrong with the FidOpenCascade script in your case I
> don't know.  Could it be finding a subset of all the libs but not all
> of them but is still assuming that it can build the plugin?
> Robert.
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Jordi Torres
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