How to compile/link my apps with my Qt 6.7 installation?

[Tom asso]

I'm installing Qt 6.7.x on my ubuntu 22.04 system with online installer. I follow these installation instructions and at the end of the process have these subdirectories in my designated installation directory:

6.7.0/          dist/  Examples/            installer.dat        junk             Licenses/         MaintenanceTool.dat  network.xml
components.xml  Docs/  InstallationLog.txt  installerResources/  licenseInfo.txt  MaintenanceTool*  MaintenanceTool.ini  Tools/

OK, but now how do I utilize these installed libraries and headers when building with cmake elsewhere on my system?

Thanks!

[Tom asso]

The cmake solution is to set CMAKE_PREFIX_PATH to the appropriate subdirectory in the designated Qt6 install directory. E.g. on my Ubuntu 22.04.3 system:
export CMAKE_PREFIX_PATH=$HOME/Qt6/6.7.2/gcc_64/

[jsulm]

If you use QtCreator you should have a new Kit for that version. If not add a new Kit and configure it to use that Qt version.

[Tom asso]

@jsulm I do not use qtcreator to build - just cmake from the command line.
In this case is there a cmake variable I should set to point at my Qt6 installation directory?
Thanks

[JoeCFD]

@Tom-asso Try to set qmake of the installed Qt6 to PATH, for example
export PATH=Qt6Path/bin/qmake6:$PATH
or
export PATH=Qt6Path/bin/qmake:$PATH
to use your Qt installation first.

[Tom asso]

@JoeCFD - thanks but not using qmake, I'm using cmake.

[Tom asso]

The cmake solution is to set CMAKE_PREFIX_PATH to the appropriate subdirectory in the designated Qt6 install directory. E.g. on my Ubuntu 22.04.3 system:
export CMAKE_PREFIX_PATH=$HOME/Qt6/6.7.2/gcc_64/

[SGaist]

Hi,

You also have the option to call the qt-cmake wrapper that can be found in the bin folder of your Qt installation.