On Linux Mint 17.x, how do I find out what version of Qt is used?

Question

I'm pretty new to Linux and am maintaining an application that runs on Mint 17.x. The application has a bug that seems to be related to an old version of Qt 5.

How can I find out what version of Qt 5 is on a freshly-created Mint 17.x machine?

Answer 1

I don't have Mint, but what I tried on Debian Jessie is first looking for the qt directory via

ls /usr/share/ | grep qt

I then changed to the directory /usr/share/qt5. From there, I did

grep -r "QtCore 5"

I found a match in /usr/share/qt5/doc/qtcore.qch/

Opening up the file in vim (or whichever editor you prefer), I searched for "QtCore 5" to find the major version. I found several mentions of QtCore 5.3 but none of "QtCore 5.1", "QtCore 5.2", or "QtCore 5.4". To find the minor version, I searched for variants of "project.qtcore.53X" where X is the minor version number. I found "project.qtcore.532" but not any other variant.

Note that for vim searches you will have to use a "\" character to escape the "." regex.

Answer 2

If you are using QtCreator:

Tools > Options... > Build & Run > Qt Versions

Answer 3

There is no Qt 5 on Mint distros, as you can see here