CMake does not work with Qt 6.7.0

JoeCFD

@odelaune run command
locate Qt6CoreConfigureFileTemplate.in
to check where it is. It is located under
/home/user/Qt/online/6.7.0/gcc_64/lib/cmake/Qt6Core
Check your path and lib settings for 6.7.0 since you have a local installation.

I just tested a cmake build with Qt 6.7.0 and did not see any issue.

odelaune

The locate command tells me that the file is located in /home/user/Qt/online/6.7.0/gcc_64/lib/cmake/Qt6Core (as expected). I also checked my $PATH and my $LD_LIBRARY_PATH. I did not see anything weird (everything is similar with Qt 6.6.3 that works fine).

odelaune

I installed a fresh Ubuntu 22.04.4 LTS and then installed QT 6.7.1 from Qt Maintenance. Qt is installed in my home and I added this location to the $PATH environment variable. Yet, I get exactly the same error

CMake Error: File /Qt6CoreConfigureFileTemplate.in does not exist.

SGaist

Hi,

You should not alter your PATH environnement variable.

What if you use the qt-cmake wrapper from your Qt installation ?

odelaune

Here is my .bash_aliases

export QT=$HOME/Qt/6.7.1/gcc_64
export LD_LIBRARY_PATH=$QT/lib:$LD_LIBRARY_PATH

And, then I simply try to run cmake like this (in the build directory as a subdirectory of the folder where sources are located):

~/Qt/6.7.1/gcc_64/bin/qt-cmake ..

Yet, still the same CMake error.
Same result with the "system" cmake.

SGaist

Can you try with 6.7.0 ?

Beside that, don't change LD_LIBRARY_PATH like that. You don't want your system to try and load your development Qt libraries in place of the ones provided by your distribution.

odelaune

@SGaist said in CMake does not work with Qt 6.7.0:

Can you try with 6.7.0 ?

I get the same error with Qt 6.7.0, but not with Qt 6.6.x...

Beside that, don't change LD_LIBRARY_PATH like that. You don't want your system to try and load your development Qt libraries in place of the ones provided by your distribution.

How should I change the LD_LIBRARY_PATH? Is there a better way to inform the system where to find the Qt libraries?

jsulm

@odelaune said in CMake does not work with Qt 6.7.0:

Is there a better way to inform the system where to find the Qt libraries?

There is no need for that, You executable contains the information where the Qt libs are, as long as they are still there your application will work. See https://en.wikipedia.org/wiki/Rpath

odelaune

This post is deleted!

odelaune

Someone has the same problem as me here. So there is indeed an issue with Qt 6.7.x. It will be fixed in the 6.7.3 release.

Meanwhile, I fixed the problem moving

find_package(Qt6 COMPONENTS LinguistTools Widgets REQUIRED)

to the root directory's CMakeLists.txt.