Problems after upgrading Ubuntu 12.0 LTS to 14.04 LTS

[Halcom]

Hi,

i updated my Ubuntu 12.04 LTS to 14.04 LTS to use same Qt Version as my Windows System (5.2.1). I try to compile my Project but he did not find the QStandardPaths (on windows it builds) include so i guess i compile against Qt 4.8.1. I tried to uninstall Qt 4.8.1 via packet manager to remove it completly. But i failed to get it work. My Questions are:

How did i see that qt version i have installed/ is used with Qt Creator?

How can i uninstall all that qt 4.8.1 stuff.? i think there must be some magic sudo apt-get uninstall xxxx stuff

How can i (re)install the qt 5.2.1 version? There must be also some sudo apt-get install xxx package.

Thank you for your help.

[anda_skoa]

How did i see that qt version i have installed/ is used with Qt Creator?

This is really the only Qt specific question here, all others should be asked in an Ubuntu forum.

Anyway: Project (left tool bar), check the details of the kit being used.

How can i uninstall all that qt 4.8.1 stuff.? i think there must be some magic sudo apt-get uninstall xxxx stuff

apt-get uninstall libqt4-dev

How can i (re)install the qt 5.2.1 version? There must be also some sudo apt-get install xxx package.

apt-get install qt5-default

Cheers,
_