Installation and Deployment

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  Which version of Qt am I using? How do I find out?
  • JKSH  

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  UNSOLVED Added DESTDIR
  • debian  

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  @debian I had a similar problem recently and posting here since it's still unsolved and other people may need. I've found a variable called INSTALL_ROOT at least in recent Qt: using the command "make INSTALL_ROOT=<dir> install" made the job.
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  UNSOLVED I can NOT find any useful solution while compiling the source code of Qt 4.8.7 with MSVC 2010 Express?
  • Charley Choi  

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  Don't use Qt4 and MSVC2010 when you're start with Qt. Use a pre-build Qt available with the Qt installer and MSVC2019. I'm pretty sure Qt4/MSVC2010 will not work with 64bit at all.
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  UNSOLVED Linux application failed to run with error: qt.qpa.plugin: Could not find the Qt platform plugin "windows" in "plugins/platforms/"
  • Sheetal Deshpande  

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  SOLVED qt examples doesnt start after deployment with windeployqt.exe
  • al072  

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  @SGaist I dont even know how to thank you!!! You helped me a lot!!! Finally i have got my first project in Qt
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  UNSOLVED Custom build step for mysql
  • romain.donze  

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  Since you are using Boot2Qt, you should ask the Qt Company directly.
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  UNSOLVED I get an error "Cannot Download Archive" during the installation.
  • Big Garlic Bread  

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  Hi and welcome to devnet, You might be hitting a faulty mirror. Try using a different one.
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  UNSOLVED QSerial Port
  • Mar_60  

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  @Mar_60 In your code, you open serialport, but you close serial. Might that be a problem? Otherwise provide more code. From the snippet, its not obvious. Regards
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  UNSOLVED Maintenance Tool mandatory account and NO valid license
  • Mercurus  

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  @porcupinebrux said in Maintenance Tool mandatory account and NO valid license: protesting loudly to the management of the Qt Company (like 5 years ago) will be the only way to revert this intrusive policy. This will only work if You are big customers, or a lot of customers do that This company is not going to backrupt. For me, looks like they are going to die soon enough, that is why they try desperately to collect the data of users in order to sell this company with higher prices. Check their report, you could see they did not earn a penny many years.
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  UNSOLVED Error with MQTT Client GUI Written with Qt
  • Juancinho_cardecan  

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  @Pablo-J-Rogina @Juancinho_cardecan Looks like that, but in this case his -L points to the source directory, unless he built that lib and put the libs inside that directory it can't work. My impressions is that he actually did not build the lib...
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  UNSOLVED [Link error]Cross-Compiling QT 5.14.2 To RPi4 failed.
  • Lak4CYUT  

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  I guess the problem is caused by that libQt5Qml.so be linked to host's libc (libstdc++ -> libm), but when other projects link to libQt5Qml.so, linker will go to reference --sysroot or -rpath specified path, and found the remote libc. I don't know why, does anyone have any idea?? Thanks.
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  SOLVED dll error when starting Qt Creator 4.8.2
  • gabor53  

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  It seems like the error is misleading. I got the same error and fixed it by removing LLVM.!
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  SOLVED Passing target directory from QT Installer to the Application
  • faiszalkhan  

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  @SGaist Thanks.
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  UNSOLVED Setup Qt for android on mac
  • Qims  

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  Hi ! Thank you, it seems that SDK tools is now detected ! But "SDK manager runs" is not found (red cross) anymore and "Platform SKD installed" is still not found. I tried several version of jdk (1.8) but their not detected, i am currently using: java -version: java version "1.8.0_241" Java(TM) SE Runtime Environment (build 1.8.0_241-b07) Java HotSpot(TM) 64-Bit Server VM (build 25.241-b07, mixed mode) What is installed: NDK r10e installed separately. The SDK Manager is now clickable in Qt Creator but still no displayed package.
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  SOLVED Qtcreator build q5 from git
  • Psnarf  

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  @Psnarf said in Qtcreator build q5 from git: code.qt.io/qt/qt5.git Thanks! Thought I could use qtcreator to build q5. That wasn't a smart idea. I skipped to the "Getting the source code" section this time, since the last time I looked at that page, all I saw were the Linux distributions that I'm not running. This time I found the good stuff. Thanks again!
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  UNSOLVED Cross-compiling Qt for ARM target not working - Need help
  • razorlikes  

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  Hi, The cross-compiler I used was the newest one from the 18.04 sources, I think 7.4. I have now downgraded to 4.9 but I still get the same error. I'm sorry if I'm missing something really simple here but I'm a total newbie when it comes to stuff like this. This is the version on my target: root@tolino:~# g++ -v Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabihf/4.9/lto-wrapper Target: arm-linux-gnueabihf Configured with: ../src/configure -v --with-pkgversion='Debian 4.9.2-10+deb8u2' --with-bugurl=file:///usr/share/doc/gcc-4.9/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.9 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.9 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libitm --disable-libquadmath --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.9-armhf/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.9-armhf --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.9-armhf --with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-sjlj-exceptions --with-arch=armv7-a --with-fpu=vfpv3-d16 --with-float=hard --with-mode=thumb --enable-checking=release --build=arm-linux-gnueabihf --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf Thread model: posix gcc version 4.9.2 (Debian 4.9.2-10+deb8u2) And this is the version of my cross compiler: vmuser@ubuntu:~/Desktop/qt_5.14.2$ arm-linux-gnueabihf-g++ -v Using built-in specs. COLLECT_GCC=arm-linux-gnueabihf-g++ COLLECT_LTO_WRAPPER=/usr/lib/gcc-cross/arm-linux-gnueabihf/4.9/lto-wrapper Target: arm-linux-gnueabihf Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.9.3-13ubuntu2' --with-bugurl=file:///usr/share/doc/gcc-4.9/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.9 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/arm-linux-gnueabihf/include/c++/4.9.3 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-libitm --disable-libquadmath --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.9-armhf-cross/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.9-armhf-cross --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.9-armhf-cross --with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libgcj --enable-objc-gc --enable-multiarch --enable-multilib --disable-sjlj-exceptions --with-arch=armv7-a --with-fpu=vfpv3-d16 --with-float=hard --with-mode=thumb --disable-werror --enable-multilib --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=arm-linux-gnueabihf --program-prefix=arm-linux-gnueabihf- --includedir=/usr/arm-linux-gnueabihf/include Thread model: posix gcc version 4.9.3 (Ubuntu/Linaro 4.9.3-13ubuntu2)
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  UNSOLVED qt5.14.1 raspberry pi 4 eglfs_kms failed
  • Gio26  

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  For days I been looking for the environment variable set to "C:\SysGCC\mingw32\msys64\usr\bin/pkg-config.exe", I think it is wrong and for this it cannot find any package. How can I correctly it to "C: /SysGCC/mingw32/msys64/usr/bin/pkg-config.exe"? Thanks.
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  UNSOLVED Offline-installer 'make install' equivalent?
  • Tom asso  

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  You did not install the corresponding development package. Search for the -dev variants of them.
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  SOLVED Attempting Windows deployment - .exe file not opening with no error messages
  qml windows deployment • • adamlaird  

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  I posted this Question on SO as well, who directed me towards a logger which made it really easy to see what was up and lead to an easy fix. Heres a link to the question if anyone would find it helpful: https://stackoverflow.com/questions/61035096/attempting-windows-deployment-exe-file-not-opening-with-no-error-messages/61036646#61036646
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  UNSOLVED undefined reference to `qt_resourceFeatureZlib'
  • nshiell  

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  @jsulm thanks very much！！ Qt libraries is 5.11，App is 5.14 。I copy libraries to imx6 ，It works！ thanks again！
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  UNSOLVED Add a new font to QtCreator
  • maher_electronic  

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  UNSOLVED Want to add a embedded device to Host machine for QT5 as USB device
  • Rathore  

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  I have imx6sx based custom board. I want to do remote debuging using QTCreator via USB. is it possible? My board does not have any ethernet port so debugging using ssh is not possible on it.
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  Slow downloads with the online installer? Try this tool
  • JKSH  

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  Fiddler-proxy with hostname-replacing helped me download from fastest mirror in my country. I try this tool, but Qt Installer still download from download.qt.io (only local rep was enabled) I past all links from this page http://download.qt.io/official_releases/online_installers/qt-unified-windows-x86-online.exe.mirrorlist in DownloadMaster and find the fastest server in Kazakhstan is mirrors.dotsrc.org In Qt Installer settings I add proxy 127.0.0.1:8888 In Fiddler I change Customize Rules "OnBeforeRequest": if (oSession.HostnameIs("download.qt.io") && oSession.PathAndQuery.StartsWith("/online/")) { oSession.hostname = "mirrors.dotsrc.org"; oSession.PathAndQuery = oSession.PathAndQuery.Replace("/online/", "/qtproject/online/"); } downloading speed changed from 300Kb/s to 10MB/s
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  SOLVED Qt doesn't find MSVC2017 compiler - installed from VS Build Tools 2019
  • Photatum  

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  You can configure Qt Creator's compiler to pick up vs2017 compiler installed with VS2019 build tool by passing "amd64 -vcvars_ver=14.16.27023" arguments to the "Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Auxiliary\Build\vcvarsall.bat" script.
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  UNSOLVED installer not working
  • Goddard  

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  Hi, I have the same problem so I tried to follow the suggestion by jsulm. I) I go to the link https://github.com/JKSH/QtSdkRepoChooser II) There I go to the link under instructions III) At step 2 of the new instructions the info links are not there anymore So I downloaded the redistributable file: qt-everywhere-src-5.14.2.tar.xz.mirrorlist But xarchiver 0.5.4.12 gives me this: an error occurred please check the store archiver output to see it Could you please make instructions on how to install Qt from the redistributable file? I am not sure if the file I downloaded is the right one. I need Qt to be able to install Hashcat gui. Thanks. Regards. Marcelo
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  UNSOLVED What's the proper way to bisect qtbase on windows?
  • _BPL_  

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  SOLVED Building with Gstreamer on Windows
  • erikherz  

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  OK. I got it to work by switching to MSVC, creating a plugins directory, setting a Gstreamer ENV to that path, like so: set GST_PLUGIN_PATH=C:\Users\vivoh\Desktop\mini\plugins, and dropping in the two required plugins, in this case: gstvideotestsrc.dll and gstd3d.dll
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  UNSOLVED QML plugins are not imported when using CMake and static Qt
  • Erulission  

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  UNSOLVED Undefined reference to `qFloatToFloat16_fast' after build Qt from source
  • Requ  

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  I just realized something: there's no need to rebuild all of Qt ! Just build the module you want using the Qt version you already installed.
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  UNSOLVED Executable from binaries doesn t work
  • TeofanG  

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  Hi, What version of Qt ? On what OS ? Where are executing your application from ?
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  This topic is deleted!
  • TeofanG  

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  UNSOLVED cannot find -lcurl, unsure on how to manipulate INCLUDEPATH & LIBS
  • lurvecoding  

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  Hi and welcome to devnet, You likely are missing the -L argument to add the path to the folder where the library can be found.
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  This topic is deleted!
  • lurvecoding  

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  UNSOLVED Add a stopwatch in QTwidget application.
  • Mar_60  

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  Hi Which part do you need help with ? You can use a QTimer + qelapsedtimer for keeping track of time. https://doc.qt.io/qt-5/qelapsedtimer.html https://forum.qt.io/topic/75609/proper-way-to-code-a-stopwatch Or you can use QDateTime as in this example https://github.com/jesslarsen21/stopwatch-QT/tree/master/a5-erik-jessica-stopwatch
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  SOLVED QApplication: No such file or directory
  • avnishsachar  

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  Solved the issue. I had not added Qt5Widgets to find_package in a top-level CMakeLists.txt.
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  UNSOLVED Microsoft Visual Studio 2010 for QT 5.3.2
  • Mar_60  

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  @Mar_60 Hi No, it just seems like a project issue. It looks like it cannot find the lib ADSDIOd did you change from release to debug and then got error or what did you do before just before it stopped compiling ?
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  SOLVED Cross-compiling Qt Embedded for Raspberry (Pi 4 model B)
  • Gio26  

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  Again me!!! :) I'm trying some examples and some is fine like "hellogl2" many others no!!!! The error: "qt.qpa.egldeviceintegration: Failed to load EGL device integration" eglfs_kms ". I can't compile kms because drm failed, it doesn't find "drm.h" which is however present in "sysroot/usr/include/drm". Could this be the problem or I need to see anything else? Thanks a lot for your help.
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  UNSOLVED QtIFW - Maintenance Tool Generates Multiple Registry Entries
  qtifw maintenancetool binary installer fw maintenance • • mgagnon-boreas  

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  UNSOLVED Qt5 CMake include all libraries into executable
  • Vildnex  

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  Hi, To execute your application outside of Qt Creator, you have to deploy it using windeployqt.
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  UNSOLVED Qt WebEngine problems during Qt 5.14.1 static build from source
  • bruh  

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  UPD: I've built Qt shared and it's all ok but I still want to solve this.