I installed QtCreator 5.8 by download Qt.run file(Qt 5.8.0 for Linux 64-bit) from Qt offical site( http://www.qt.io/download-open-source/#section-2).

I installed by command line(sudo ./qt.run).Installation done successfully.

When i tried to open qt-creator from command line.

./qtcreator: symbol lookup error: /opt/Qt5.8.0/Tools/QtCreator/lib/Qt/plugins/platformthemes/libqgtk3.so: undefined symbol: g_type_ensure.

Host : ubuntu 12.04.

  • Please edit your question and describe how you installed QtCreator. – Carl H Mar 7 '17 at 11:09
  • @cal H. Problem solved. I download qt-sdk package through synaptic.Then it starts working – Ravi sankar Mar 8 '17 at 10:17

This is just a platform theme, simply delete the file /opt/Qt5.8.0/Tools/QtCreator/lib/Qt/plugins/platformthemes/libqgtk3.so and it should start.

You will have to tackle another problem regarding "/usr/lib/x86_64-linux-gnu/libstdc++.so.6: version 'GLIBCXX_3.4.18' not found", which can be solved by installing this ppa:

sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install libstdc++6-4.7-dev
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