If you are trying to launch the application via SSH then display it on your host's display, have you tried export DISPLAY=:0 on your SSH terminal?

Hi,

You can set the LD_LIBRARY_PATH environment variable before starting your application. Otherwise, if memory serves well, you need to configure the rpath when building your application. See QMAKE_RPATHDIR.

@raven-worx doing a shadow build in a parallel directory (instead of build inside the source folder), the tslib support has been added succesfully (the reason is a mistery for now). The make process gives other errors, but the tslib subject is solved. Thank you.

Yes, it is. But Qbs is better (IMHO), and you can use QtCreator && VSCode IDEs. ;)
CMake it is pain...

@ben80 said in Use two QT5.x versions in parallel:

@jeremy_k said in Use two QT5.x versions in parallel:

What's the reason for using different versions of Qt 5? Going down this route opens up a class of problems involving incompatible intermingling.

@jeremy_k said in Use two QT5.x versions in parallel:

Option 4)
Have you looked into using a virtualenv for the python program? Apt-get won't install into it, but pip will. This encapsulates the library path mangling, although the same environment pollution problem exists for child processes.

It seems like there is so much that i can do wrong here. I am running this raspberry only at my home, so i am not distributing it. As long as i have a working solution (not too messy) it's ok for me.

That's the best version of an unfortunate scenario. If you're careful about not executing other programs, the environment variable issue is manageable. Python modules that use external commands to discover bits of system configuration appears to be common. For example, https://github.com/pyinstaller/pyinstaller/issues/4657. QDesktopServices::openUrl() failing to work is another one to watch for.

I cannot use pip on the raspberry, since there are no ARM packages for PySide2 provided. Therefore i am using apt-get. I am also using a pyenv virtualenv, but i need to copy the site-package files manually. Not nice, but it works.

It might be reasonable to tell apt-get to install into the venv directory as an alternative root. For dpkg, the option appears to be --root=<alternative root>.

hi vpettersson,

i got the same errors and got it working with 3 symlinks:

in sysroot/opt/vc/include/EGL

mv egl.h egl.h-old
mv eglext.h eglext.h-old
mv eglplatform.h eglplatform.h-old

ln -s /home/jw78/raspi/qt-everywhere-src-5.15.2/qtwebengine/src/3rdparty/chromium/third_party/khronos/EGL/eglext.h eglext.h
ln -s /home/jw78/raspi/qt-everywhere-src-5.15.2/qtwebengine/src/3rdparty/chromium/third_party/khronos/EGL/egl.h egl.h
ln -s /home/jw78/raspi/qt-everywhere-src-5.15.2/qtwebengine/src/3rdparty/chromium/third_party/khronos/EGL/eglplatform.h eglplatform.h

of course you must adjust your paths (/home/jw78/raspi/qt-everywhere-src-5.15.2)

there are many egl.h/eglext.h/eglplatform.h to include and because of the include order the comiler fetches first the files in sysroot/opt/vc/include/EGL
probably the better solution is to reorder the "-I" flags for the compiler, but i have no idea how to do this

i did not
dpkg --purge libraspberrypi-dev

I completely forgot to ask if this is even the "usual" or "preferred" way to cross build, deploy and remote debug?

My only concern is to start with the start script, so the executable itself and the called command actually differ

Hi author here,

Now there's a dedicated guide available to follow for cross-compiling latest QT for any Raspberry Pi Model or Version with mentioned GCC toolchains:

https://github.com/abhiTronix/raspberry-pi-cross-compilers/blob/master/QT_build_instructions.md

I fixed it! My qmake.conf was correct but I was missing a configuration option. Now my configuration looks lit this:

~/qt-everywhere-src-5.11.2//configure -opensource -confirm-license -release -device stm32mp1 -device-option CROSS_COMPILE=~/gcc-linaro-7.4.1-2019.02-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf- -sysroot ~/STM32MPU_workspace/STM32MP15-Ecosystem-v1.0.0/Developer-Package/SDK/sysroots/cortexa7t2hf-neon-vfpv4-openstlinux_weston-linux-gnueabi -skip qtwebengine -prefix /usr/local/Qt-5.11.2-arm -nomake examples -nomake tests -opengl es2

Hi,

If you copy the files over your target respecting the same folders as your desktop machine, then you won't have anything special to do.

Hi, I described the steps I followed in a post over here, https://mechatronicsblog.com/cross-compile-and-deploy-qt-5-12-for-raspberry-pi/

Some people found some issues and posted comments there, the “qendian” issue seems to be related to this bug, there is also a patch there.

https://bugreports.qt.io/browse/QTBUG-71945

@PatZim said in RaspberryPi2EGLFS tutorial fail at Step 10 "./configure":

I am wondering if there is no native solution for Macs

As you figured out yourself, I guess it all just comes down to get a cross-compiler for ARM that runs on Mac...

But I bet using the VM with Linux is a good approach, given that lots of guides/tutorials are based on such platform

May I suggest to change for Python 3 ?
Python 2.7 will reached end of life next year so it's not a good idea to start a new project with it.

Thank you! Yes, InputPanel was what was needed to make the VirtualKeyboard actually show on embedded (eglfs_kms or wayland). Then it also needs a y and width. And then it is always visible by default, so I guess need to bind visible: active.

The code shown on this page, i.e. without InputPanel, "just worked" on desktop (except the virtual keyboard was massive), but not embedded
https://doc.qt.io/qt-6/qtvirtualkeyboard-basic-example.html
and the "Detailed Description" here didn't really explain why/when to use it
https://doc.qt.io/qt-6/qml-qtquick-virtualkeyboard-inputpanel.html

@bignumb It did help me too!!!!

Hi,

Where did you get this library from in the first place ?

@ZenitFan219

How to use "windeployqt" on Ubuntu?

You have two options:

You pack what's needed by hand and don't use the deployment tool at all. You try to run the said tool through wine, which may or may not work.

Cheers!

@Zevero I had the same problem, is there a solution for the mouse click that doesn't work in the web pages.