Update Qt from 5.5.1 to 5.6.0

Swati · E Eddy 31 May 2017, 12:16

Hi. I downloaded the source and compiled it myself.

Eddy · 31 May 2017, 13:24

Hi. I downloaded the source and compiled it myself.

Hi Swati,
In that case the choice is up to you. Do you need the older build for your applications or not? You can have both builds next to each other if you want.
Personally I like to clean up older builds completely and have a fresh start. The online installer might be a good choice as @jsulm suggested.

Today Qt 5.9 was released and it LTS, unless you are forced to use Qt 5.6 I would recommend this latest version.

Swati · J jsulm 31 May 2017, 12:27

@jsulm

I'm pretty sure I didn't use packages from KUbuntu.

I used Qt Online Installer for Linux. And as far as I remember, I followed something similar to this:
https://wiki.qt.io/Install_Qt_5_on_Ubuntu

Swati · E Eddy 31 May 2017, 13:08

@Eddy

No. I don't need the older version for my application. I have to use 5.6.0 (recommended).

How to completely remove the older version from system and just keep the updated one?

Eddy · 31 May 2017, 20:38

look for the file named "MaintenanceTool" in the folder where you installed Qt and run it.

You can select from the dialog which version and options you want. If you uncheck the 5.5 version, it will be deleted.

BTW there is some confusion here : you are using the online installer and not the sources.

Swati · 1 Jun 2017, 04:16

@Eddy

I've downloaded 653 MB file of Qt 5.6.2 for Linux 64 bit (offline installer) and then followed these steps: https://wiki.qt.io/Install_Qt_5_on_Ubuntu

Qt creator 5.6.2 is now running fine on system. But i've an issue. The application that requires Qt is still detecting 5.5.1 version. Could you please tell me how to fix that? (It looks for Qt version in usr/lib/x86_64-linux-gnu/cmake/Qt5/Qt5Config.cmake )

jsulm · 1 Jun 2017, 05:34

@Swati You just need to configure your kit in QtCreator properly.
Go to "Tools/Options.../Build & Run" and add your Qt 5.6 version there under "Qt Versions" and then configure a Kit with this Qt version. Then use this Kit.

Swati · 1 Jun 2017, 05:36

@jsulm

This is already added under auto-detected - Qt 5.6.2 GCC 64bit /home/swati/Qt5.6.2/5.6/gcc_64/bin/qmake Do I need to add anything else?

Under Kits, i says Desktop Qt 5.6.2 GCC 64bit (default) under auto-detected.

jsulm · S Swati 1 Jun 2017, 05:34

@Swati said in Update Qt from 5.5.1 to 5.6.0:

Desktop Qt 5.6.2 GCC 64bit (default)

is the correct Qt version selected in this kit?
Try to delete the build folder, execute qmake and build again.

Veluri Mithun · 12 Jan 2017, 09:49

@Swati @Eddy @jsulm I too have similar issue here, my new software require Qt5.7 but, though I have it in my home directory This cmake is not detecting!!

here I attach the screenshot of error and qt install directory

Any help would be much appreciated!!.

Thank you.

SGaist · wrote on 1 Dec 2017, 22:50

Hi and welcome to devnet,

Because you have to tell cmake where to find your other version of Qt. use cmake -DCMAKE_PREFIX_PATH=/path/to/your/Qt/lib/cmake so it can find it.

Veluri Mithun · wrote on 5 Dec 2017, 17:02

Thank you.I got it

SGaist · wrote on 5 Dec 2017, 20:38

You're welcome !

Since that fixes your problem, please mark the thread as solved using the "Topic Tools" button so that other forum users may know a solution has been found :)

Veluri Mithun · 7 Dec 2017, 08:10

I'm really sorry. I didn't open this thread and I'm not able to see that option also here on my screen!!. :/

mrjj · wrote on 7 Dec 2017, 08:10

@Veluri-Mithun
Fair enough :)
The original poster was not online for long time so i marked it solved.