Installation and Deployment

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  UNSOLVED qt.qpa.xcb: could not connect to display AND Failed to create OpenGL context for format QSurfaceFormat
  deploy qt 5 • • johnyboy  

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  if you dont have any windows manager running then it will be an issue for xcb. Yes, it looks like @mrjj is right here. However, you could still run the Qt app in the RPi device and make it display on another machine if you connect via SSH with X Forwarding enabled. $ ssh -X user@RPi /path/to/your/Qt/app -platform xcb
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  UNSOLVED setup.py - how should such a file be structured?
  • PythonQTMarlem  

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  You're welcome ! Since you have it working now, please mark the thread as solved using the "Topic Tools" button or the three doted menu beside the answer you deem correct so that other forum users may know a solution has been found.
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  UNSOLVED Create Setup.py file with PyCharm
  • PythonQTMarlem  

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  Hi, As posted in your other thread, unless you have very specific needs, installing dependencies should be done using python's package manager. Use a proper dependency list to trigger their installation.
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  UNSOLVED Unable to find the platform plugin.
  • saitej  

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  Did you do that in a clean folder ?
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  UNSOLVED To import external library in Qt.
  • Mrityunjay  

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  How are you trying? What does not work? What are you trying to achieve? What compiler are you using? Was ImageMagick compiled using the same compiler? Is it linking properly?
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  UNSOLVED Is it possible to deploy/develop a Linux app from windows QT platform?
  • jensen  

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  @jensen Well i have not tried it (i use a virtual machine) but with WSL2 supports graphical apps so good chances you can make it work with Creator. But you will be able to compile etc for sure as everything command line just works. https://ubuntu.com/blog/ubuntu-on-wsl-2-is-generally-available https://www.pcworld.com/article/3543763/windows-10-moves-closer-to-true-linux-with-graphical-support-for-wsl2.html
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  UNSOLVED Uninstaller doesn't work
  • An0n  

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  Hi, and welcome! @An0n said in Uninstaller doesn't work: I've tried some fixes but they also didn't work What fixes did you try? If I try to uninstall it via the uninstaller itself, via the win10 uninstaller, or een by running MaintenenceTool.exe directly, nothing happens. What happens if you run MaintenanceTool.exe as Administrator? (Right-click > "Run as Administrator") What happens if you run it from the command line? Do you see any error messages?
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  UNSOLVED Is it possible to compile once, run everywhere for windows.
  deploy compile commercial platform • • ramzy  

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  Hi and welcome to the forums Yes it should run on most other windows 10 64 bit. Maybe even win 7. But there is no guarantee as such with brand new mega patches. A license would give you many benefits but it's not better to deploy as such.
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  SOLVED Issues setting up GCC 8.3.0 Cross Compiler to compile Qt 5.15 for Raspberry Pi 4
  embedded cross-compile toolchain raspberry pi 4 qt 5.15 • • cosmonaut65  

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  I managed to solve this issue by following this guide: https://github.com/UvinduW/Cross-Compiling-Qt-for-Raspberry-Pi-4 I think the cross-compiler I downloaded above had issues using my sysroot directory. The instructions linked above use a linaro compiler (albeit an older one) and it compiled Qt 5.15 successfully.
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  SOLVED QApplication, QLabel : no such file or directory
  qlabel qapplication • • Genne  

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  PATH ? Why did you change that environment variable manually ?
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  UNSOLVED Qmake not included on Opensource 4.12.4?
  • Neodreadlord  

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  Hi Sgaist and thank you, I am thinking that is the case though now I have followed the instructions and installed qt and still don't have qmake so I am now going through it step by step to ensure I have done everything correctly. If I cannot resolve it, I will remove everything and start from scratch but it seems to be that qmake just isn't there when I install it. I will update here as I go. Thanks Neo
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  SOLVED Create Linux Executable for Qt Application
  • jineshmehta  

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  @jsulm I found the problem and the solution as well. Check this out: https://stackoverflow.com/questions/45329372/ubuntu-recognizes-executable-as-shared-library-and-wont-run-it-by-clicking
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  UNSOLVED Can't use QT 5.12
  • Lucas Figueiras  

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  @Lucas-Figueiras said in Can't use QT 5.12: @SGaist After some time without my pc, i finally got back, and I reinstalled ubuntu fresh, and the only thing i did was download QT from this link, and the same error still happens. If i try to do qmake --version, it says it's version 5.9.5, even tho QTcreator doesn't even have this option, since I only installed versions 5.12.9 and 5.15.0. So now i'm stuck again You are invoking the qmake matching the Qt version installed by your distribution which is the correct behaviour.
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  UNSOLVED qtmqtt build on windows
  • JungJIhyun  

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  @JungJIhyun said in qtmqtt build on windows: When I try qtmqtt build using mingw32-make below errors are come The idea is that you have Qt already installed, either by installing pre-built files for your OS or by building Qt yourself, before building mqtt module. Is that your case? Could you please describe your environment (OS, Qt version, how you installed it, etc.)?
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  UNSOLVED Build Issue; Updating to Android 10
  • Edward P.  

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  Any help would be really appreciated. Is there more useful information that I could provide ?
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  SOLVED Apparently successful build but missing modules
  • DirkDS  

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  Abbendum: In the meanwhile I ran in the qtwebengine folder qtwebengine> qmake -r (in addition to configure/make in the qt toplevel source directory) and learned from the output that I had to install a couple of more packages like fontconfig, xrandr ( libXrandr-devel on this centos machine ) After the dependenciese where solved, qtwebengine was built and my problem seems to be solved. (I am just waiting for the compiler and will then mark this as solved).
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  UNSOLVED Be able to develop in Ubuntu for i.mx 8 nano debian buster
  • aeg1  

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  Qt installation issue on ubuntu and application deployment. Shows xcb error!!
  • sash17  

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  Hi it seems just using xlaunch or xming solved the problem, thank you for ur reply
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  UNSOLVED Attempting to build QT from source for I.MX 8 Nano Debian.
  • aeg1  

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  UNSOLVED Static Qt 5.12.6 build on Ubuntu 18.04 - dreaded 'qt.qpa.plugin: Could not find the Qt platform plugin "xcb" in ""' error
  • Will  

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  @Skhms-E if I remember correctly it was fixed with the next Qt 5.12.7 update since it was a bug in Qt's build configuration. If you still get the bug then one of your build options. Below is part of my discussion with Qt support on this topic: I looked in both files and didn't see an obvious failure the anything relating to XCB. I've attached files. It doesn't list QPA modules that are not going to be built and that doesn't seem to be listing XCB under there. In config.log it looks like xcb libraries are found, but xkbcommon is not which is one of the dependencies for it: looking for library xkbcommon Trying source 0 (type pkgConfig) of library xkbcommon ... /usr/bin/pkg-config --exists --silence-errors xkbcommon '>=' 0.5.0 pkg-config did not find package. => source produced no result. Trying source 1 (type inline) of library xkbcommon ... None of [libxkbcommon.so libxkbcommon.a] found in [] and global paths. => source produced no result. test config.qtbase_gui.libraries.xkbcommon FAILED You can probably just install libxkbcommon-dev package, then rerun configure with -recheck-all as an additional option to force it to recheck all features.
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  UNSOLVED qt for android building error Mac
  • fatih1  

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  I uninstalled it and tried again: the result is still this
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  SOLVED QT on Debian imx 8 Nano
  • aeg1  

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  @Pablo-J-Rogina said in QT on Debian imx 8 Nano: -no-opengl Now it configures but fails during the linking on make. I truly appreciate all the help you have provided so far!! /home/agarza/working/gcc-linaro-6.3.1-2017.05-x86_64_aarch64-linux-gnu/bin/../lib/gcc/aarch64-linux-gnu/6.3.1/../../../../aarch64-linux-gnu/bin/ld: /home/agarza/working/sysroot/usr/lib/aarch64-linux-gnu/libpthread.a(pthread_create.o)(.text+0x4dc): unresolvable R_AARCH64_ADR_PREL_PG_HI21 relocation against symbol `__stack_chk_guard@@GLIBC_2.17' /home/agarza/working/gcc-linaro-6.3.1-2017.05-x86_64_aarch64-linux-gnu/bin/../lib/gcc/aarch64-linux-gnu/6.3.1/../../../../aarch64-linux-gnu/bin/ld: final link failed: Bad value collect2: error: ld returned 1 exit status Makefile:1225: recipe for target '../../lib/libQt5Core.so.5.15.0' failed make[3]: *** [../../lib/libQt5Core.so.5.15.0] Error 1 make[3]: Leaving directory '/home/agarza/working/qt-everywhere-src-5.15.0/qtbase/src/corelib' Makefile:225: recipe for target 'sub-corelib-make_first' failed make[2]: *** [sub-corelib-make_first] Error 2 make[2]: Leaving directory '/home/agarza/working/qt-everywhere-src-5.15.0/qtbase/src' Makefile:50: recipe for target 'sub-src-make_first' failed make[1]: *** [sub-src-make_first] Error 2 make[1]: Leaving directory '/home/agarza/working/qt-everywhere-src-5.15.0/qtbase' Makefile:87: recipe for target 'module-qtbase-make_first' failed make: *** [module-qtbase-make_first] Error 2
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  UNSOLVED Test the Python QT program on MacOS
  • PythonQTMarlem  

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  @PythonQTMarlem Not the slightest ? What cpu do you have ? 8GB seems fine so have a look at cpu usage and see if it very taxed.
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  UNSOLVED qt-unified-windows-x86-3.2.3-online fails immediately
  • js12  

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  @mrjj said in qt-unified-windows-x86-3.2.3-online fails immediately: but they removed them now it seems Those are now for commercial users
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  UNSOLVED Qt installer silently fails to run on Windows 10
  • chrisvo  

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  Hi , try downloading and starting DebugView https://docs.microsoft.com/en-us/sysinternals/downloads/debugview Then start the installer again and see if there’s any messages in DebugView
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  UNSOLVED Python and Qt application: Deployment platform-independent and user-friendly
  • PythonQTMarlem  

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  thank you.
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  UNSOLVED (Another) question about Qt creator licenses.
  • umiedotre9  

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  @umiedotre9 said in (Another) question about Qt creator licenses.: On the license page it says "Must provide a relinking mechanism for Qt libraries" Which page exactly? You can use QtCreator for closed source projects. The only problem is if you modify QtCreator and distribute that modified version, but this is not what you want to do, right? Another example: you can use GCC for closed source projects even though it is GPL. It is just a tool which you do not distribute and which is not part of your project.
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  UNSOLVED How to install qt version?(for Linux)
  • kisa  

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  @kisa How did you install Qt? /usr/lib/qt5 is most probably Qt from your distribution. Did you use Qt online installer?
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  SOLVED Qml static application fail to deploy.
  • anups  

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  Found the fix. It was the VM display driver which don't have opengl support. Once I turned on the 3D Acceleration in VirtualBox settings the static application worked perfectly. So, I guess the bug has been fixed. I can confirm that I have built Qt 5.15.0 statically on Windows and 5.12.9 on Linux and in both cases static application worked with -opengl desktop.
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  UNSOLVED Release build error on static build of QT 5.15.0
  • WildcardZLT  

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  Can you post your configure command line? By looking at the error you might try building Qt with -qt-zlib.
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  UNSOLVED Online installer downloading useless information
  • jnewbon  

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  Thought is add an update to this, found a program called aqtinstaller, reduced the amount i needed to download as well and the annoyance of having to login. Didn't eliminate everything i didn't need but took the download time from an hour to about 5 mins (once I choose the right mirror) Might be able to change the mirror in the online installer, tbh I didn't look I was too annoyed with it at that point to ever want to use it again.
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  SOLVED Qt5.12.8 missing QMySql Plugin
  • DiegoN  

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  Thank you for your help! I suspected something like that. Best Regards, Diego.
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  UNSOLVED Use QTDIR environment variable in XCode Build Settings
  • Gilbert Hsu  

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  UNSOLVED Qt5.14.2 qt-everywhere-src-5.14.2.zip cannot run in ubuntu18.04
  • dijia  

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  Hi, and welcome! @dijia said in Qt5.14.2 qt-everywhere-src-5.14.2.zip cannot run in ubuntu18.04: 'bash: ./configure: /bin/sh^M: ^M is related to the Windows line ending. Linux interprets it wrongly. Download qt-everywhere-src-5.14.2.tar.xz instead. These source files use Linux line endings.
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  UNSOLVED Qt app UI elements randomly rendered as blank/black in Docker
  c++ qtcreator docker • • Geeva  

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  @lduboeuf Hi Nothing we can do about it. Its a docker issue. Make sure you run a full Linux with X server etc inside the docker. Then i had no issues running my app. If you use a special docker, it might have side effects as not operating like a normal OS would.
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  UNSOLVED Re-question) Poppler arm cross compile error
  qt 4.8 poppler • • Hwanwoo  

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  @Hwanwoo maybe this command helps a little bit ./configure --help to understand all the possible options to configure
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  SOLVED Qt online installer access denied
  • jineshmehta  

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  started working now.
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  This topic is deleted!
  • Alertjohn  

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  SOLVED Deploy on remote windows/android device
  • JobRecrd  

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  @JobRecrd said in Deploy on remote windows/android device: Do I need to use Debug > Start Debugging > Attach to Running Debug Server? This is for debugging, not deploying. You would first need to deploy it to the remote machine. I'm not sure QtCreator supports deployment to a Windows machine. If you go to "Options/Devices/Devices" you can only add Linux QNX devices, no Windows. You should be able to add a deployment step in your pro file (but can't tell you exactly how). Or you create a package using windeployqt, copy it manually to the remote machine and start it there.
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  UNSOLVED Procedural entry point not found
  • dittelund  

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  A Path to the msvc2019 binary files and the QtDir variable to the Qt directory. (Sorry can only post every 10mins as new user)