Qt version to build the GUI apps

[Nanich87]

I am trying to build the GUI apps but the script terminates while trying to build rtkget_qt with this error:

getmain.cpp:507:35: error: ‘class QDropEvent’ has no member named ‘position’; did you mean ‘posted’?
     if (StaList == childAt(event->position().toPoint()))

qmake --version
QMake version 3.1
Using Qt version 5.9.5 in /usr/lib/x86_64-linux-gnu

lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.6 LTS
Release:	18.04
Codename:	bionic

[nicholasdalhaug]

It is worth noting this comment that says that the Linux GUI is not maintained, but it is available for resurrection if someone wants to do it.