CGAL users discussion list

["Laurent Rineau (CGAL/GeometryFactory)" <>]

Le Saturday, June 10, 2017 6:53:48 AM CEST Sukhraj Singh a écrit :
> Continuing the discussion.
> 
> I found AABB_tree easy to use, as it had a QT UI file and looked simple.
> In order to make a CGAL-QT project I took this as a template code, and
> copied it out side the CGAL source.
> Did a CMAKE, provided paths to CGAL, QT and QGLViewer.
> It build successfully.
> But when I run I got following error.
> 
> ./AABB_demo: /home/sukhraj/Qt5.6.2/5.6/gcc_64/lib/libQt5Core.so.5: version
> `Qt_5.7' not found (required by /usr/lib/x86_64-linux-gnu/libQt5Svg.so.5)

That message shows that you have at least two versions of Qt5 installed on 
that machine:

  - one in your $HOME directory, at /home/sukhraj/Qt5.6.2/ (that seems to be 
Qt-5.6.2)
  - and one installed by the system (seems to be a Debian/Ubuntu), in /usr/, 
that is probably Qt-5.7.x.

Probably you configured your build of the application to use the version in /
home/sukhraj/Qt5.6.2/ but, at run-time, the way the dynamic linker searches 
for shared library makes it find the file /usr/lib/x86_64-linux-gnu/
libQt5Svg.so.5. You should specify the environment variable LD_LIBRARY_PATH, 
to point it to "/home/sukhraj/Qt5.6.2/5.6/gcc_64/lib/", so that the dynamic 
linker can see that `libQt5Svg.so.5` can be found in that directory, before 
looking in the standard directories of the system.


-- 
Laurent Rineau, PhD
R&D Engineer at GeometryFactory           http://www.geometryfactory.com/
Release Manager of the CGAL Project       http://www.cgal.org/