Deploying Qt Application on Linux

sharath

@jsulm i was trying to build linuxdeployqt and try to create .appImage from my machine. i didn't get how to create app image from linuxdeployqt source.
Can u please tell me how to create and get appImage of linuxdeployqt for ARM?

jsulm

@sharath Please be more precise. You downloaded linuxdeployqt-6-x86_64.AppImage from https://github.com/probonopd/linuxdeployqt/releases, is this correct?
I already asked, but once more:

Did you mark it as executable?
Do you execute it on an x86_64 machine

"Can u please tell me how to create and get appImage of linuxdeployqt for ARM?" - as described here https://github.com/probonopd/linuxdeployqt

Or here https://doc.qt.io/qt-5/linux-deployment.html "Creating the Application Package".

sharath

@jsulm said in Deploying Qt Application on Linux:

Did you mark it as executable?
yes i did
Do you execute it on an x86_64 machine
No i didn't execute it on x86_64 machine

jsulm

@sharath said in Deploying Qt Application on Linux:

No i didn't execute it on x86_64 machine

Well, since it's x86_64 binary it will not work on anything else.
Do it on your PC. And then follow the instructions to deploy.

One question: do you do cross compilation or do you build/deploy directly on your device?

sharath

@jsulm said in Deploying Qt Application on Linux:

One question: do you do cross compilation or do you build/deploy directly on your device?

i'm building directly on target device.

sierdzio

@sharath said in Deploying Qt Application on Linux:

@jsulm said in Deploying Qt Application on Linux:

One question: do you do cross compilation or do you build/deploy directly on your device?

i'm building directly on target device.

Then you need to compile linuxdeployqt on that device, too. Building instructions are in a file called BUILDING https://github.com/probonopd/linuxdeployqt/blob/master/BUILDING.md

sharath

Thanks @sierdzio, i will try this

sharath

hello @sierdzio, i compiled linuxdeployqt on my device and trying to run below command

./linuxdeployqt /path/to/appbinary -appimage

i get following error

linuxdeployqt 6 (commit 5195ec1), build <local dev build> built on 2019-12-10 05:35:49 UTC
ERROR: The host system is too new.
Please run on a system with a glibc version no newer than what comes with the oldest
currently still-supported mainstream distribution (xenial), which is glibc 2.23.
This is so that the resulting bundle will work on most still-supported Linux distributions.
For more information, please see
https://github.com/probonopd/linuxdeployqt/issues/340

hskoglund

There's an alternative that's supposed to work on newer Linux systems:
https://github.com/linuxdeploy/linuxdeploy

sierdzio

@sharath said in Deploying Qt Application on Linux:

i get following error

Well, what do you expect from me? The error message tells you exactly what to do. Use an older operating system so that glibc is older.

Or use -unsupported-allow-new-glibc flag to suppress this error.

sharath

Thanks @sierdzio, it has worked and created all dependent libraries.

But when i take this app and run this in other machine i get below error

./AppRun: error while loading shared libraries: libGLdispatch.so.0: cannot open shared object file: No such file or directory

sierdzio

Do you run linuxdeployqt with -appimage flag? Try running it twice, it sometimes helps.

Does your other machine have OpenGL libraries installed? Does it support OpenGL at all?

sharath

@sierdzio said in Deploying Qt Application on Linux:

Do you run linuxdeployqt with -appimage flag? Try running it twice, it sometimes helps.
Does your other machine have OpenGL libraries installed? Does it support OpenGL at all?

i ran linuxdeployqt with -appimage many times and also openGL is installed on my target system.

i'm getting same issue

sierdzio

OK then. Run with -verbose=3 and look at the output - perhaps there is some warning there that is important for you in this case.

You can try running deploy first without appimage flag, then copy the OpenGL library manually into the package, then run linuxdeployqt again with -appimage.

Lastly, maybe -extra-plugins= flag can be used to force linuxdeployqt to deploy that library.

sharath

@sierdzio thank you for your support, I don't know why this shows diff errors.

./app: /lib/aarch64-linux-gnu/libm.so.6: version `GLIBC_2.27' not found (required by /home/ninetripod/Documents/Vistaro_linux_1.0/bin/libopencv_core.so.4.0)
./app: /lib/aarch64-linux-gnu/libm.so.6: version `GLIBC_2.27' not found (required by /home/ninetripod/Documents/Vistaro_linux_1.0/bin/libopencv_imgproc.so.4.0)
./app: /usr/lib/aarch64-linux-gnu/libstdc++.so.6: version `CXXABI_1.3.11' not found (required by /home/ninetripod/Documents/Vistaro_linux_1.0/bin/libtbb.so.2)
./app: /lib/aarch64-linux-gnu/libz.so.1: version `ZLIB_1.2.9' not found (required by /home/ninetripod/Documents/Vistaro_linux_1.0/bin/libpng16.so.16)

sierdzio

Does the AppImage run correctly when you launch it on the original machine (same where you compile and run linuxdeployqt on)?

I don't have any further ideas.

sharath

@sierdzio when i run linuxdeployqt , below warning i'm getting

ninetripod@X3399:~/Documents/build-linuxdeployqt-Desktop-Debug/bin$ ./linuxdeployqt /home/ninetripod/Documents/vistaro_04_12/vistaro_build/vistaroQtQuick -appimage -unsupported-allow-new-glibc

WARNING: Not checking glibc on the host system.
         The resulting AppDir or AppImage may not run on older systems.
         This mode is unsupported and discouraged.
         For more information, please see
         https://github.com/probonopd/linuxdeployqt/issues/340
app-binary: "/home/ninetripod/Documents/vistaro_04_12/vistaro_build/vistaroQtQuick"
appDirPath: "/home/ninetripod/Documents/vistaro_04_12/vistaro_build"
relativeBinPath: "vistaroQtQuick"
Keeping existing AppRun
WARNING: Plugin "/usr/lib/aarch64-linux-gnu/qt5/plugins/platformthemes/libqgtk2.so" not found, skipping
WARNING: Plugin "/usr/lib/aarch64-linux-gnu/qt5/plugins/styles/libqgtk2style.so" not found, skipping
WARNING: "/home/ninetripod/Documents/vistaro_04_12/vistaro_build/qt.conf" already exists, will not overwrite.

i think this is the issue i guess.

sharath

@sierdzio said in Deploying Qt Application on Linux:

Does the AppImage run correctly when you launch it on the original machine (same where you compile and run linuxdeployqt on)?

yes it has worked correctly.

sierdzio

I don't think gtk style plugins are a problem, they have little to do with OpenGL lib.

sharath

@sierdzio i got to know that im building my linudeployqt on latest version of glibc, it should build on older version of glibc. so that it can be run on any newer version glibc as stated in https://github.com/probonopd/linuxdeployqt/issues/340