Upgrading from QT 5.12.8 to 5.15

[GargDivanshu]

I am currently working on QT 5.12, but application i want to compile is available on QT 5.15.2, and i find myself unable to upgrade it Can anyone pls help me. Every time i try it just breaks something.
I am on WSL2 Ubuntu 20.04

[Christian Ehrlicher]

Looks like there are still development packages for Qt 5.12 around - upgrade them to 5.15

[JoeCFD]

@GargDivanshu said in Upgrading from QT 5.12.8 to 5.15:

QT 5.15.2

Install QT 5.15.2 under /opt/Qt and set its path for your cmake.
export Qt5_DIR=/opt/Qt/5.15.2/gcc_64/lib/cmake/Qt5
or
export QT_DIR=/opt/Qt/5.15.2/gcc_64
export PATH=$QT_DIR/bin:$PATH /* this will override Qt 5.12.8 */
in .bashrc file

[GargDivanshu]

@JoeCFD Can you pls send a link for tutorial ans or a video, coz i am unable to do as you mentioned.

[mchinand]

How did you install the newer version of Qt? Where is it located in the filesystem?

[JoeCFD]

@GargDivanshu
download qt-unified-linux-x64-online.run from
https://download.qt.io/official_releases/online_installers/
and install QT 5.15.2 into /opt/Qt

[GargDivanshu]

@JoeCFD i tried finding opt/QT in my system, but not able to find. Actually I am on WSL2 so is it really the correct way for me to upgrade to 5.15.2?

[JoeCFD]

@GargDivanshu it is /opt and you create Qt dir inside /opt with command: sudo mkdir Qt.
You actually do not need it. I believe Qt installer has /opt/Qt as default install dir.

[mchinand]

@GargDivanshu

1. Download qt-unified-linux-x64-online.run
2. Go to your download directory
3. run chmod +x qt-unified-linux-x64-online.run
4. run sudo ./qt-unified-linux-x64-online.run
5. Install Qt 5.15.2 (or whatever version), it should automatically install it in /opt/Qt

I should start a Qt-related TikTok channel.

[GargDivanshu]

@mchinand ya do make TikTok videos or Youtube shorts, these technologies do require such content ;p

[jsulm]

@JoeCFD said in Upgrading from QT 5.12.8 to 5.15:

You actually do not need it. I believe Qt installer has /opt/Qt as default install dir.

By default the installer installs in home folder: /home/USER_NAME/Qt