QT5 Crosscompile MX8MP Yocto

Hello,

There is a new version of the F&S Introduction to QT5 Debugging an Application Version documentation available.

It also describes how to cross-compile QT5 applications with the Yocto toolchain.

F&S Introduction to QT5 Debugging an Application Version 1.5

We only tested it with i.MX8MM so far so please let us know if you have any difficulties with i.MX8MP

Your F&S Support Team

Thanks for the hint.

We have updated the documentation accordingly.

Your F&S Support Team

Hi,

I just came across this post, and I'd like to point out, that the commands also did not work for me (as it is still written in the Doc-File F&S Introduction to QT Debugging an Application v.1.11).

Instead, I did:

This seems to work fine (Qt and all Qt packages were built).

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I'd kindly like to ask another question, related to the documentary pointed out earlier.

After building the toolkit and running the bash script in /tmp/deploy/sdk, the documentation guides me to do:

"After that you have to install the new root filesystem on your remote target system." (p. 10)

I am unsure, what it means. I have built a fus-image-qt6 earlier and flashed it to my efusa9r2q.

After running the bash script, the toolchain was installed to /opt/fus-imx-wayland/5.15-kirkstone. However, the images and build files in /tmp/deploy/images/fsimx6/ remained untouched.

Should I bitbake the qt6-image again, after installation of the toolchain?

Thanks!

Hello,

if you have added additional QT libraries, you should use also install a new QT image, so the libraries installed on the board match the one from the toolchain.

If not you can just use the fus-image-qt6 example image.

Your F&S Support Team

Hi,

thank you for your quick response.

So, I followed the steps in the doc, and I successfully deployed two Qt applications on the board, one QtQUick and one QtWidgets application. The board runs on the fus-image-qt6 example image.

I indeed did install an additional library in the VM (QSerialPort), but it is not used for the example applications I try to test the remote debugging with.

However, when running it (either from the VM via SSH, or directly on the board), the program crashes with the error:

The same with the QtQuick app:

I guess, this is due to missing libraries on the board, which I assumed were present after building and deploying the fus-image-qt6 example image.

Yes it seems that way.

Your F&S Support Team

Hiya,

I have built a core-image-base image, and included the following lines to my conf/local.conf file:

This works just fine, now. I can deploy and run Qt Widgets and Qt Quick applications via SSH on the target!

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The two applications I tested successfully were built with qmake. However, if I try to deploy and run an application which is being built by CMake, it fails with the following errors:

Is there a way to also run and debug CMake-built applications using the Kit described in the Documentation via SSH?

Hello,

did you add the path of the CMAKE Version of your Yocto SDK to your Kit?

Your F&S Support Team

Good morning,

yes, I have set up the Kit (Qt Version, compiler, debugger, cmake) as stated in the documentary, pointing to the SDK in /opt/fus-imx-wayland/5.15-kirkstone/sysroots/x86_64-pokysdk-linux/.

I could get rid of the errors I posted before, by setting the CMAKE_SYSROOT variable.

Furthermore, I explicitly set the target architecture and FPU (floating point unit), since I experienced errors stating, that the FPU for the target was not set:

Just to make sure, I also specified the installation directory on the target conditionally, just as it is suggested to do in a .pro-file, if qmake is used

However, the error I see after adjusting these settings in my CMakeLists.txt file, are now of a nature of missing dependencies, I assume. I have attached the error output to this post.

The line, the error message points to in CMakeLists.txt:10, reads:

In the attached cmake error output, the lines

• Line 40: CMake Warning at /opt/fus-imx-wayland/5.15-kirkstone/sysroots/x86_64-pokysdk-linux/usr/share/cmake-3.22/Modules/CMakeFindDependencyMacro.cmake:47 (find_package):
  Found package configuration file:
  /opt/fus-imx-wayland/5.15-kirkstone/sysroots/cortexa9t2hf-neon-poky-linux-gnueabi/usr/lib/cmake/Qt6Core/Qt6CoreConfig.cmake
  but it set Qt6Core_FOUND to FALSE so package "Qt6Core" is considered to be NOT FOUND.
• Line 55: CMake Warning at /opt/fus-imx-wayland/5.15-kirkstone/sysroots/cortexa9t2hf-neon-poky-linux-gnueabi/usr/lib/cmake/Qt6/Qt6Config.cmake:223 (find_package):
  Found package configuration file:
  /opt/fus-imx-wayland/5.15-kirkstone/sysroots/cortexa9t2hf-neon-poky-linux-gnueabi/usr/lib/cmake/Qt6Quick/Qt6QuickConfig.cmake
  but it set Qt6Quick_FOUND to FALSE so package "Qt6Quick" is considered to be NOT FOUND.

make me suspecting, there is some sort of misconfiguration of CMake, not finding the QtCore and QtQuick packages.

I checked, the Qt6CoreConfig.cmake and Qt6QuickConfig.cmake files are located at the correct path.

I checked the Qt6Config.cmake at line 223 (first error in call stacks), and it failes at the find_package command.

I will investigate further today, but any hints, tips or black magic will be helpful!

Cheers.