Using deal.ii 9.1.1 in a Qt5 program

[Arnoud de Geus]

Hello,

I'm trying to use deal.ii 9.1.1 in a Qt5 program,

effectively trying to build a functional FEM UI on deal.ii

The usage of the Cmake system for Qt and Deal.ii

do seem to be completely incompatible though.

Has anyone experience with this?

[Wolfgang Bangerth]

> I'm trying to use deal.ii 9.1.1 in a Qt5 program,
> effectively trying to build a functional FEM UI on deal.ii
> The usage of the Cmake system for Qt and Deal.ii
> do seem to be completely incompatible though.

Arnoud,
I know nothing about the Qt configuration system and how they are
incompatible.

But the way to approach this would be if you had a separate project for
the GUI that simply uses both deal.II and Qt as external dependencies.
At this point, it doesn't matter any more how the two dependencies were
configured and/or built -- you just import them as you would do with any
other dependency.

Or you lean more heavily on deal.II's machinery and build a project like
ASPECT that utilizes parts of deal.II's configuration functionality in
the project's CMakeLists.txt file -- take a look here:
https://github.com/geodynamics/aspect
In that case, you'd treat deal.II as a building block and Qt as an
external dependency. If you look at

https://github.com/geodynamics/aspect/blob/master/CMakeLists.txt#L119-L154
you can see how ASPECT treats "WorldBuilder" as a dependency.

Best
W.

--
------------------------------------------------------------------------
Wolfgang Bangerth email: bang...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/

[Bruno Turcksin]

Arnoud,

Wolfgang already explained how to get CMake working but I wanted to let you know about an issue (and a solution!) when using QT and deal.II together: https://github.com/dealii/dealii/issues/7524

Best,

Bruno