Installation and Deployment

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  Unsolved how to compile mysql plugin for Qt5.7 in centos 7.5
  • rahulvishwakarma

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  Unsolved Is it possible to build QtMqtt on Windows 10 for Android ARM v7?
  • Matthias Klein

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  Hi and welcome to devnet,

  One maybe simpler way to do that would be to open the module in Qt Creator and build it using the Android Kit.

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  Unsolved Project ERROR: Cannot run compiler 'clang++'. Output
  • jarelsanders1986

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  HI, I have solved the same problem in Ubuntu 18 just by installing qt creator from the repository. In my case it was:

  sudo apt-get install qtcreator

  This will install all necessary package by itself and then you can run your currently installed version, as this command, unfortunately, doesn't show docs and examples (in my case).

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  Unsolved Deployment to remote Linux development
  • SPlatten

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  @SPlatten Can you log on the device by SSH?

  Then it should be possible to create a SSH public/private key pair on your development station by ssh-keygen. Afterwards you copy the public key (e.g. ~/.ssh/id_rsa.pub to the device and append it to the file ~/.ssh/authorized_keys.

  Afterwards you should be able to log-in on the device without password, just by the key.

  And if you now point QtCreator to your private key: voilá, it should work from there too.

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  Solved Deploy qt desktop app 'Driver not loaded'
  • AdrianN17

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  Sure. It was a mistake using static QSqlDatabase object, because only fail at the deployment.

  Thanks guys.

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  Unsolved publish app microsoft store
  microsoft uwp desktop bridge • • Guigiidre

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  @Guigiidre If you want to publish for WinRT why don't you want to rebuild it for WinRT?
  That would be the clean solution and not some hacks with Desktop bridge.

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  Unsolved Qt Creator and Maintenance tool does not react to user input
  • Saeid

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  Hi,

  Any chances that you had a Windows update in between ? A graphic card driver update ?

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  This topic is deleted!
  • SPlatten

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  Unsolved Qt LGPL Dynamic Library Check (cybersecurity process)
  • educhene

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  @sierdzio said in Qt LGPL Dynamic Library Check (cybersecurity process):

  @educhene said in Qt LGPL Dynamic Library Check (cybersecurity process):

  So even if library are not the same, we let the possibility to the user to run the software (at his own risk) , we are ok with the LGPL ?

  That seems fine to me.

  But I'm not a lawyer and all that ;-)

  I, a non-lawyer, agree with @sierdzio :)

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  Unsolved Building pyside2 on Windows 10 VS2017
  • dhabbyc

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  @dhabbyc said in Building pyside2 on Windows 10 VS2017:

  pyside2 is officcially supported

  Given that, could it be possible you mark your post as solved? Thanks.

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  Solved qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
  • twar

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  @DevAlone

  qt.qpa.xcb: could not connect to display <<-- Is that the message you're talking about?

  Could you explain a little better what was your problem and how did you fix it?

  What is lxc? And why to run another GUI app? I really didn't understand what you did to fix this problem.

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  Unsolved Install Qt 5.9.8 on Windows 7 x32
  • koluna

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  @koluna said in Install Qt 5.9.8 on Windows 7 x32:

  I see an update SP1, but it is not present in system info

  Looks like SP1 is not installed, you should install it.

  "MinGW 5.3 is present twice in screen above. Should I use both items?" - the naming of the first is unfortunate I would say. It should rather be "Qt MinGW 5.3.0 32 bit" to avoid confusion. In short: the first (at the top) is the Qt version to use with WinGW compiler, second one is to install MinGW 5.3. You need both of them.

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  Solved {Tahoma8}Installer in the "Install" button of latest qt unified installer
  • kamui

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  Seems to be solved in the last update (3.1.1 online installer).

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  Unsolved Build Qt5.9.1: error: invalid conversion from ‘xcb_window_t {aka unsigned int}’ to ‘EGLNativeWindowType {aka void*}’ [-fpermissive]
  • MHermann

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  Hi,

  Are you locked to that old version of Qt ?
  If not, you should update to Qt 5.12 and check if things get better.

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  Unsolved Who is using Qt5?
  • BKBK

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  @BKBK said in Who is using Qt5?:

  Their rules now state that software from foreign owned companies cannot be used

  Qt is open source. Qt Company does not own the project - there is an agreement with KDE that if Qt Company ever "goes bad" and closes Qt source, KDE will automatically take the code over and keep it open source.

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  Solved How to configure Qt with enabled udev support?
  • MHermann

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  @SGaist : I re-run 'configure' again. But this time with the option '-recheck-all'. Now udev support is enabled.

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  Solved QtWidgets/qwidget.h: No such file or directory
  • mcggoal

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  @mcggoal Good! at least a step forward.

  Cross compilation is an advanced topic and needs quite some experience.

  Maybe someone else can help you better than me, but at least I've some questions for you:

  Do you have another (native) Qt version on your system? If yes, where is it installed? Do you call an environment-setup script to set-up your cross-compiler? Usually such scripts set the environment variables needed to find the compiler, the tools and also set up the sysroot for your embedded device. Have you already verified that the files below /usr/local/lib are the cross-compiled ones? You can check with file libXXXX.so. That gives me the impression that the files are wrongly installed. Reason: /lib, /usr/lib, and /usr/local/lib are for native libraries, same applies for /bin, /usr/bin and /usr/local/bin for the binaries. Cross compiled binaries and should rather be installed in /opt or in your home directory.

  Regards

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  Solved windeployqt.exe file is empty
  • Togar1560

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  @Togar1560

  Sometimes the antivirus app is removing files. That happened to me in the past.

  Good to know that you solved your issue.

• 

  Solved Crossplatform shared build
  • EndrII 0

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  Found
  They lay elsewhere.

  andrei@quasarapp:~$ locate libgcc_s_seh-1.dll /usr/lib/gcc/x86_64-w64-mingw32/7.3-posix/libgcc_s_seh-1.dll /usr/lib/gcc/x86_64-w64-mingw32/7.3-win32/libgcc_s_seh-1.dll
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  Unsolved Qt 5 build recipe for target 'sub-assimp-make_first' failed
  • Appa_k

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  Solved QVPNClient file not found
  • LeVence

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  Ahh, I see. Okay, thank you!

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  Unsolved QT UWP and Qt Widget
  • Craftplorer

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  Yes I put a label and a button on the main widget with the qt form editor also I can start the widget project with the desktop MSVC qt kit but when I change to uwp MSVC kit I just get a blank window and lots of errors (see above). Also I did all updates one thing to say it is only a windows 10 vm but it should work anyway right?

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  Unsolved Strange error building qtwebengine component on Windows (5.7.1)
  • Dan G.

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  In case anyone else hits the same problem, it is probably a path length issue. See https://lists.qt-project.org/pipermail/development/2016-November/027700.html for a similar problem.

  I had this problem and reduced the path length and now QtWebEngine has built fine.

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  Unsolved compile qtwebengine with extra compile flag
  • joeyskeys

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  Unsolved RPI cross-compilation errors : lGLESv2,cannot find id and xcb
  raspberry eglfs cross-compiling ubuntu 16.04 lglesv2 xcb opengl • • vishbynature

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  It's not a problem of Qt Creator. The mkspec used for the RPI3 is still valid unless your sysroot comes from a Debian Stretch were they have changed the library name.

  You need to modify the mkspec under devices that matches the Rpi3

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  Solved Unable to cross compile Qt5.12.3 for Armv7
  • Kelsey

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  I was able to figure this out with more testing. I noticed that if I configured with the -no-opengl option I was able to compile/install without errors.

  This led me to looking into my .conf file to make sure I had my paths setup correctly. I used this configure input

  ./configure -release -opengl es2 -device linux-beagleboard-g++ -device-option CROSS_COMPILE=/opt/gcc-linaro-6.4.1-2018.05-x86_64_arm-linux-gnueabihf/bin/arm-linux-gnueabihf- -sysroot /mnt/Smartlog-rootfs -opensource -confirm-license -make libs -no-use-gold-linker -prefix /usr/local/qt5-SLL -extprefix /home/scorpion/Qt_Source/Qt_Installed/Qt_5.11.3_Beagleboard -skip qtserialbus -skip qtscxml -skip qtscript -skip qtcharts -skip qt3d -skip qtdatavis3d -skip qtcanvas3d -skip qtgamepad -skip qtvirtualkeyboard -skipqtwayland -skip qtwebengine -skip qtwebchannel -skip qtwebglplugin -qt-zlib -recheck-all

  and this .conf file

  MAKEFILE_GENERATOR = UNIX CONFIG += incremental QMAKE_INCREMENTAL_STYLE = sublib QMAKE_RPATHLINKDIR_POST += $$[QT_SYSROOT]/usr/lib/arm-linux-gnueabihf QMAKE_RPATHLINKDIR_POST += $$[QT_SYSROOT]/lib/arm-linux-gnueabihf include(../../common/linux.conf) include(../../common/gcc-base-unix.conf) include(../../common/g++-unix.conf) load(device_config) QT_QPA_DEFAULT_PLATFORM = eglfs # modifications to g++.conf QMAKE_CC = $${CROSS_COMPILE}gcc QMAKE_CXX = $${CROSS_COMPILE}g++ QMAKE_LINK = $${QMAKE_CXX} QMAKE_LINK_SHLIB = $${QMAKE_CXX} # modifications to linux.conf QMAKE_AR = $${CROSS_COMPILE}ar cqs QMAKE_OBJCOPY = $${CROSS_COMPILE}objcopy QMAKE_NM = $${CROSS_COMPILE}nm -P QMAKE_STRIP = $${CROSS_COMPILE}strip COMPILER_FLAGS = -march=armv7-a -mtune=cortex-a8 -mfpu=neon -mthumb #modifications to gcc-base.conf QMAKE_CFLAGS += $${COMPILER_FLAGS} QMAKE_CXXFLAGS += $${COMPILER_FLAGS} QMAKE_CXXFLAGS_RELEASE += -O3 QMAKE_LIBS += -lrt -lpthread -ldl # Extra stuff (OpenGL, DirectFB, ...) QMAKE_INCDIR_EGL = $$[QT_SYSROOT]/usr/include/EGL QMAKE_LIBDIR_EGL = $$[QT_SYSROOT]/usr/lib/arm-linux-gnueabihf QMAKE_INCDIR_OPENGL_ES2 = $${QMAKE_INCDIR_EGL} QMAKE_LIBDIR_OPENGL_ES2 = $${QMAKE_LIBDIR_EGL} QMAKE_INCDIR_OPENVG = $${QMAKE_INCDIR_EGL} QMAKE_LIBDIR_OPENVG = $${QMAKE_LIBDIR_EGL} QMAKE_LIBS_EGL = -lEGL -lIMGegl -lsrv_um QMAKE_LIBS_OPENGL_ES2 = -lGLESv2 $${QMAKE_LIBS_EGL} QMAKE_LIBS_OPENVG = -lOpenVG $${QMAKE_LIBS_EGL} DISTRO_OPTS += hard-float # No need for any special EGL device integration. # Prioritize the default, compiled-in integration over any plugins. EGLFS_DEVICE_INTEGRATION = none include(../common/linux_arm_device_post.conf) load(qt_config)

  With these changes I was able to compile without errors and everything seems to be running as intended.

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  Solved Completely clean Git Qt sources
  • PS76

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  @aha_1980 Thanks - the second git clean step did the trick.

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  Unsolved Configuration is faulty. Check the Issues view for details. Error while building/deploying project unti (kit: Desktop Qt 5.6.2 MSVC2015 64bit) When executing step "Make"
  • Guest

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  It seems this issue has come back (we're now 2019). It occurred to me several times. Restarting QtCreator works for me (terrible solution!)

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  Unsolved Qml deploiment to Android, in a sub project architecture
  • drenghel

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  Solved Qt 5.12.3 for UWP Kit not Loading
  • ndt_mike

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  Thanks for the help. I am going to mark this closed.

  Seems like loading MSVS 2019 does something to the MSVS2017 install. I was able to get it to run on a new machine without either Qt or MSVS already installed. I was able to get QtCreator running and compiling on the machine I had previously loaded MSVS 2019 installed but it was still doing flaky things.

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  Solved OpenCV 4.x+ requires enabled C++11 support
  • Hugo Mayorga

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  Ok, Working without problems on Qt 5.12

  Thanks!

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  Unsolved Using cross compile in windows for ARM use.
  • victor wang

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  @victor-wang

  I have chosen to go through desktop linux in a VirtualBox

  As @koahnig said , maybe using a VM for your development machine will save you time and headaches, since most of the toolchains for cross-compiling are available for Linux as first option

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  Solved Qt doesn't find MSVC2017 compiler - installed from VS Build Tools 2019
  • Photatum

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  @Photatum I guess QtCreator needs to be adapted to different folder structure in order to recognise the compiler installed this way. I'm sure QtCreator developers are working on this :-) If not it is possible to file a change request.

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  Unsolved Upgrade from Qt 5.5 to 5.12
  • MaxMueller

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  Unsolved Older versions versus new
  • yuliana

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  One thing I would do is to search through all the content of these folder to find out what defines the build type.

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  Solved Windows deployment and missing DLL dependencies
  • mewster

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  @hskoglund said in Windows deployment and missing DLL dependencies:

  One question: the list of dependent dlls for an .exe file only include the filenames, the source path windeployqt uses for the copying seems to be Qt's bin directory only. So, in order for your Qt5Pdf.dl to be successfully copied by windeployqt, did you first copy Qt5Pdf.dl into Qt's bin directory?

  Yep, both Qt5Pdf.dll and qca-qt5.dll are inside C:\Qt\5.12.3\msvc2017_64\bin (same folder as windeploy). They were automatically copied with their post-build installation

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  Unsolved Qt build for Raspberry Pi 3 on Windows 10 using mingw32, gcc and raspberry-gcc6.3.0-r3 fails
  • Napi

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  @FluxDice

  Hi and welcome to devnet forum

  Here is a link to the Qt documentation for cross compiling.
  https://doc.qt.io/qt-5/embedded-linux.html

  For raspberry specifically there is also https://www.raspberrypi.org/forums/viewtopic.php?t=204778

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  Solved Script to help build/cross-compile Qt from sources
  • r3d9u11

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  Unsolved Qt app UI elements randomly rendered as blank/black in Docker
  c++ qtcreator docker • • Geeva

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  But... why? Why docker?

  Anyway. Do other applications show normally? Like some standard Gnome/KDE apps.

  I strongly recommend using something newer than Qt 5.0.1. It was an extremely buggy release. And it's super old.

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  Solved QtMultimedia can't detect libs during cross-compilation
  • r3d9u11

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  @r3d9u11 Well, topic was solved with previous version of toolchain (g++ v6)