Found unsuitable Qt version "5.12.8" from /usr/bin/qmake, this code requires Qt 4.x

[ashfaq92]

I have been trying to install baxter simulator by following the official link. However, I am stuck in the Build Source section where catkin_make give following error:

CMake Error at /usr/share/cmake-3.16/Modules/FindQt4.cmake:1314 (message):
  Found unsuitable Qt version "5.12.8" from /usr/bin/qmake, this code
  requires Qt 4.x
Call Stack (most recent call first):
  baxter_simulator/baxter_sim_io/CMakeLists.txt:15 (find_package)

Here are my implementation details:

ROS Version: noetic (I figured everything else for neotic)
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.6 LTS
Release:        20.04
Codename:       focal

[LiferLifer]

I have the same problem, try below:

Install Qt4:
https://ubuntuhandbook.org/index.php/tag/install-qt4-ubuntu-20-04/

(There are other methods to install, but many of resource are no longer valid. If you want, you can try build from the source:
https://download.qt.io/archive/qt/ )

The key point is to install qmake of qt4.

Then, view the current default version:

qmake -v

Open config:

cd /usr/lib/x86_64-linux-gnu/qt-default/qtchooser
sudo gedit default.conf

In it, edit "qt4" to "qt5".

And then, view the current default version again.

qmake -v

May.. can help(

[knorth55]

Please try this PR.
#132