qtchooser exits with error message not changing qt version

[Ralph Janke]

Instead of allowing to choose qt version, qtchooser acts as following:

$ qtchooser -qt=qt5
qtchooser: could not exec '/usr/lib/i386-linux-gnu/qt5/bin/qtchooser': No such file or directory
$ qtchooser -qt=qt4
qtchooser: could not exec '/usr/lib/i386-linux-gnu/qt4/bin/qtchooser': No such file or directory

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu Raring Ringtail (development branch)
Release: 13.04
Codename: raring

All necessary qt4 and qt5 packages are installed

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Diego Schulz (dschulzg)]

same thing with Qt Assistant

$ assistant
assistant: could not exec '/usr/lib/i386-linux-gnu/qt5/bin/assistant': No such file or directory

[Blaze (blaze)]

Diego
do the following thing "sudo apt-get install qt4-default".

Here I must say that due to that switching "innovation" qtcreator is not able to find qmake. Dammit!

[Manner Róbert (the-manni)]

Same here when I have only installed the package "qt5-default". Mine was caused by missing packages.

You can search for a missing file like this:
$ apt-file search /usr/lib/i386-linux-gnu/qt5/bin/assistant
qttools5-dev-tools: /usr/lib/i386-linux-gnu/qt5/bin/assistant

After installing the above package the problem about the missing file went away. I still needed one more package to be able to run assistant:

Error reading collection file '/home/<username>/.local/share/QtProject/Assistant/qthelpcollection_5.0.1.qhc': Cannot load sqlite database driver!.

This could be solved by installing "libqt5sql5-sqlite".

[Diego Schulz (dschulzg)]

@Blaze, I tried it. Unfortunately it didn't work for qtchooser. Assistant is working just fine, though.

Following Manner Róbert advice, installed apt-file tool and it seems that the actual qtchooser binary is not to be found in any package in the standard repositories. The qtchooser package provides a 22k binary (/usr/bin/qtchooser), but that file is what doesn't works in the first place. It seems like it tries to run the actual /usr/lib/i386-linux-gnu/qt${Qt_VERSION}/bin/qtchooser.

[Timo Jyrinki (timo-jyrinki)]

Fixed with qtchooser 26-3ubuntu1 in saucy, also available for Ubuntu 13.04 in qt5-beta-proper PPA at the moment.

That is, qtchooser now shows help text instead of a non-helpful error when called in ways that seem logical like in the bug description but which are actually not supposed ways of using qtchooser.

[marcobra (Marco Braida) (marcobra)]

We need same on 12.04...