%general-entities; ]> Qt6 Qt6 is a cross-platform application framework that is widely used for developing application software with a graphical user interface (GUI) (in which cases Qt6 is classified as a widget toolkit), and also used for developing non-GUI programs such as command-line tools and consoles for servers. &lfs120_checked; Package Information Download (HTTP): Download (FTP): Download MD5 sum: &qt6-md5sum; Download size: &qt6-size; Estimated disk space required: &qt6-buildsize; Estimated build time: &qt6-time; Qt6 Dependencies Required Recommended , , , , , , (QtMultimedia backend), , , , , , , , , , , , , , (Mesa must be built with Wayland EGL backend), , , , and Optional (for sdpscanner, and at runtime for QtConnectivity module), , , , or MySQL, , , , , , , assimp, Flite, Firebird, FreeTDS, libproxy, OpenAL, speech-dispatcher, tslib, and Vulkan Installing in /opt/qt6 The BLFS editors recommend installing Qt6 in a directory other than /usr, ie /opt/qt6. This is needed to avoid conflicts with Qt5. To do this, set the following environment variable: export QT6PREFIX=/opt/qt6 Sometimes the installation paths are hardcoded into installed files. This is the reason why /opt/qt6 is used as installation prefix instead of /opt/qt-&qt6-version;. To create a versioned Qt6 directory, you may rename the directory and create a symlink: mkdir -pv /opt/qt-&qt6-version; ln -sfnv qt-&qt6-version; /opt/qt6 Later on, you may want to install other versions of Qt6. To do that, just remove the symlink, create the new versioned directory, and recreate the /opt/qt6 symlink again before building the new version. Which version of Qt6 you use depends only on where the symlink points. If Qt6 is being reinstalled into the same directory as an existing instance, run the commands done by root, such as make install, from a console or non-Qt6 based window manager. It overwrites Qt6 libraries that should not be in use during the install process. If you did not install some of the recommended dependencies, examine ./configure --help output to check how to disable them or use internal versions bundled in the source tarball. The build time and space required for the full Qt6 is quite long. The instructions below do not build the tutorials and examples. Removing the -nomake line will create additional resources.. The BLFS editors do not recommend installing Qt6 into the /usr hierarchy because it becomes difficult to find components and to update to a new version. There are also some programs that conflict with those installed by Qt5. The libxkbcommon-1.6.0 package removes some definitions that are not used. Remove those here: sed -i '242,245d' qtbase/src/gui/platform/unix/qxkbcommon.cpp Install Qt6 by running the following commands: ./configure -prefix $QT6PREFIX \ -sysconfdir /etc/xdg \ -dbus-linked \ -openssl-linked \ -system-sqlite \ -nomake examples \ -no-rpath \ -syslog \ -skip qt3d \ -skip qtquick3dphysics \ -skip qtwebengine \ -Wno-dev && ninja ./configure -prefix $QT6PREFIX \ -sysconfdir /etc/xdg \ -dbus-linked \ -openssl-linked \ -system-sqlite \ -nomake examples \ -no-rpath \ -journald \ -skip qt3d \ -skip qtquick3dphysics \ -skip qtwebengine \ -Wno-dev && ninja This package does not come with a test suite. Now, as the &root; user: ninja install Remove references to the build directory from installed library dependency (prl) files by running the following command as the &root; user: find $QT6PREFIX/ -name \*.prl \ -exec sed -i -e '/^QMAKE_PRL_BUILD_DIR/d' {} \; Install images and create the menu entries for installed applications. Again as the &root; user: pushd qttools/src && install -v -Dm644 assistant/assistant/images/assistant-128.png \ /usr/share/pixmaps/assistant-qt6.png && install -v -Dm644 designer/src/designer/images/designer.png \ /usr/share/pixmaps/designer-qt6.png && install -v -Dm644 linguist/linguist/images/icons/linguist-128-32.png \ /usr/share/pixmaps/linguist-qt6.png && install -v -Dm644 qdbus/qdbusviewer/images/qdbusviewer-128.png \ /usr/share/pixmaps/qdbusviewer-qt6.png && popd && cat > /usr/share/applications/assistant-qt6.desktop << EOF [Desktop Entry] Name=Qt6 Assistant Comment=Shows Qt6 documentation and examples Exec=$QT6PREFIX/bin/assistant Icon=assistant-qt6.png Terminal=false Encoding=UTF-8 Type=Application Categories=Qt;Development;Documentation; EOF cat > /usr/share/applications/designer-qt6.desktop << EOF [Desktop Entry] Name=Qt6 Designer GenericName=Interface Designer Comment=Design GUIs for Qt6 applications Exec=$QT6PREFIX/bin/designer Icon=designer-qt6.png MimeType=application/x-designer; Terminal=false Encoding=UTF-8 Type=Application Categories=Qt;Development; EOF cat > /usr/share/applications/linguist-qt6.desktop << EOF [Desktop Entry] Name=Qt6 Linguist Comment=Add translations to Qt6 applications Exec=$QT6PREFIX/bin/linguist Icon=linguist-qt6.png MimeType=text/vnd.trolltech.linguist;application/x-linguist; Terminal=false Encoding=UTF-8 Type=Application Categories=Qt;Development; EOF cat > /usr/share/applications/qdbusviewer-qt6.desktop << EOF [Desktop Entry] Name=Qt6 QDbusViewer GenericName=D-Bus Debugger Comment=Debug D-Bus applications Exec=$QT6PREFIX/bin/qdbusviewer Icon=qdbusviewer-qt6.png Terminal=false Encoding=UTF-8 Type=Application Categories=Qt;Development;Debugger; EOF -nomake examples: This switch disables building of the example programs included in the source tarball. Remove it if you want to build them. -skip qt3d: This switch disables building qt3d support. There is a problem building these files without an external library and no packages in BLFS use qt3d. -system-sqlite: This switch enables use of the system version of SQLite. -dbus-linked -openssl-linked: These switches enable explicit linking of the D-Bus and OpenSSL libraries into Qt5 libraries instead of dlopen()-ing them. -syslog: This switch allows to send Qt messages to the syslog logging system. -journald: This switch allows to send Qt messages to the journald logging system. -skip qtwebengine: This switch disables building the QtWebEngine. The BLFS editors have chosen to build separately. -skip qtquick3dphysics: This switch disables building the Qt Quick 3D Physics submodule. On 32-bit systems, this will cause the build process to fail with an inlining error in Qt6's bundled copy of the PhysX SDK. If is installed, QT6DIR should be available to the super user as well. Execute the following commands as the &root; user: cat > /etc/sudoers.d/qt << "EOF" Defaults env_keep += QT6DIR EOF You now need to update the following configuration files so that Qt6 is correctly found by other packages and system processes. As the &root; user, update the /etc/ld.so.conf file and the dynamic linker's run-time cache file: cat >> /etc/ld.so.conf << EOF # Begin Qt addition /opt/qt6/lib # End Qt addition EOF ldconfig /etc/ld.so.conf As the &root; user, create the /etc/profile.d/qt6.sh file: cat > /etc/profile.d/qt6.sh << "EOF" # Begin /etc/profile.d/qt6.sh QT6DIR=/opt/qt6 pathappend $QT6DIR/bin PATH pathappend $QT6DIR/lib/pkgconfig PKG_CONFIG_PATH export QT6DIR # End /etc/profile.d/qt6.sh EOF Installed Programs Installed Libraries Installed Directories androiddeployqt (hard link to androiddeployqt6), androiddeployqt6, androidtestrunner, assistant, balsam, balsamui, canbusutil, cooker, designer, instancer, lconvert, linguist, lrelease, lupdate, materialeditor, meshdebug, pixeltool, qdbus, qdbuscpp2xml, qdbusviewer, qdbusxml2cpp, qdistancefieldgenerator, qdoc, qmake (hard link to qmake6), qmake6, qml, qmldom, qmleasing, qmlformat, qmllint, qmlls, qmlplugindump, qmlpreview, qmlprofiler, qmlscene, qmltc, qmltestrunner, qmltime, qqem, qsb, qtdiag (hard link to qtdiag6), qtdiag6, qtpaths (hard link to qtpaths6), qtpaths6, qtplugininfo, qt-cmake, qt-cmake-create, qt-configure-module, shadergen, and shapegen libQt6Bluetooth.so, libQt6Bodymovin.so, libQt6BundledEmbree.a, libQt6BundledPhysX.a, libQt6BundledResonanceAudio.a, libQt6Charts.so, libQt6ChartsQml.so, libQt6Coap.so, libQt6Concurrent.so, libQt6Core.so, libQt6Core5Compat.so, libQt6DBus.so, libQt6DataVisualization.so, libQt6DataVisualizationQml.so, libQt6DeclarativeOpcua.so, libQt6Designer.so, libQt6DesignerComponents.so, libQt6DeviceDiscoverySupport.a, libQt6EglFSDeviceIntegration.so, libQt6EglFsKmsGbmSupport.so, libQt6EglFsKmsSupport.so, libQt6ExampleIcons.a, libQt6FbSupport.a, libQt6Graphs.so, libQt6Grpc.so, libQt6Gui.so, libQt6Help.so, libQt6HttpServer.so, libQt6InputSupport.a, libQt6JsonRpc.so, libQt6KmsSupport.a, libQt6LabsAnimation.so, libQt6LabsFolderListModel.so, libQt6LabsQmlModels.so, libQt6LabsSettings.so, libQt6LabsSharedImage.so, libQt6LabsWavefrontMesh.so, libQt6LanguageServer.so, libQt6Location.so, libQt6Mqtt.so, libQt6Multimedia.so, libQt6MultimediaQuick.so, libQt6MultimediaWidgets.so, libQt6Network.so, libQt6NetworkAuth.so, libQt6Nfc.so, libQt6OpcUa.so, libQt6OpenGL.so, libQt6OpenGLWidgets.so, libQt6PacketProtocol.a, libQt6Positioning.so, libQt6PositioningQuick.so, libQt6PrintSupport.so, libQt6Protobuf.so, libQt6Qml.so, libQt6QmlCompiler.so, libQt6QmlCore.so, libQt6QmlDebug.a, libQt6QmlDom.a, libQt6QmlLocalStorage.so, libQt6QmlLS.a, libQt6QmlModels.so, libQt6QmlToolingSettings.a, libQt6QmlTypeRegistrar.a, libQt6QmlWorkerScript.so, libQt6QmlXmlListModel.so, libQt6Quick.so, libQt6Quick3D.so, libQt6Quick3DAssetImport.so, libQt6Quick3DAssetUtils.so, libQt6Quick3DEffects.so, libQt6Quick3DGlslParser.so, libQt6Quick3DHelpers.so, libQt6Quick3DHelpersImpl.so, libQt6Quick3DIblBaker.so, libQt6Quick3DParticleEffects.so, libQt6Quick3DParticles.so, libQt6Quick3DPhysics.so, libQt6Quick3DPhysicsHelpers.so, libQt6Quick3DRuntimeRender.so, libQt6Quick3DSpatialAudio.so, libQt6Quick3DUtils.so, libQt6QuickControls2.so, libQt6QuickControls2Impl.so, libQt6QuickControlsTestUtils.a, libQt6QuickDialogs2.so, libQt6QuickDialogs2QuickImpl.so, libQt6QuickDialogs2Utils.so, libQt6QuickEffects.so, libQt6QuickLayouts.so, libQt6QuickParticles.so, libQt6QuickShapes.so, libQt6QuickTemplates2.so, libQt6QuickTest.so, libQt6QuickTestUtils.a, libQt6QuickTimeline.so, libQt6QuickWidgets.so, libQt6RemoteObjects.so, libQt6RemoteObjectsQml.so, libQt6Scxml.so, libQt6ScxmlQml.so, libQt6Sensors.so, libQt6SensorsQuick.so, libQt6SerialBus.so, libQt6SerialPort.so, libQt6ShaderTools.so, libQt6SpatialAudio.so, libQt6Sql.so, libQt6StateMachine.so, libQt6StateMachineQml.so, libQt6Svg.so, libQt6SvgWidgets.so, libQt6TextToSpeech.so, libQt6UiTools.so, libQt6VirtualKeyboard.so, libQt6WaylandClient.so, libQt6WaylandCompositor.so, libQt6WaylandEglClientHwIntegration.so, libQt6WaylandEglCompositorHwIntegration.so, libQt6WebChannel.so, libQt6WebChannelQuick.so, libQt6WebSockets.so, libQt6WebView.so, libQt6WebViewQuick.so, libQt6Widgets.so, libQt6WlShellIntegration.so, libQt6XcbQpa.so, and libQt6Xml.so /opt/qt6 and /opt/qt-&qt6-version; Short Descriptions assistant is a tool for presenting on-line documentation assistant balsam is a tool to convert 3D scenes from various creation tools to QML format, for use by the new QtQuick 3D library balsam canbustil is a tool to deal with arbitrary CAN bus frames. A Controller Area Network (CAN) is a vehicle bus standard designed to allow microcontrollers and devices to communicate with each other in applications without a host computer canbusutil designer is a full-fledged GUI builder. It includes powerful features such as preview mode, automatic widget layout, support for custom widgets, and an advanced property editor designer lconvert is part of Qt5's Linguist tool chain. It can be used as a standalone tool to convert and filter translation data files lconvert linguist provides support for translating applications into local languages linguist lrelease is a simple command line tool. It reads XML-based translation file in TS format and produces message files used by the application lrelease lupdate finds the translatable strings in the specified source, header and Qt Designer interface files, and stores the extracted messages in translation files to be processed by lrelease lupdate meshdebug displays information about qtquick-3d mesh files meshdebug pixeltool is a desktop magnifier and as you move your mouse around the screen it will show the magnified contents in its window pixeltool qdbus lists available services, object paths, methods, signals, and properties of objects on a bus qdbus qdbuscpp2xml takes a C++ source file and generates a D-Bus XML definition of the interface qdbuscpp2xml qdbusviewer is a graphical D-Bus browser qdbusviewer qdbusxml2cpp is a tool that can be used to parse interface descriptions and produce static code representing those interfaces, qdbusxml2cpp qdistancefieldgenerator allows a font cache to be pregenerated for Text.QtRendering to speed up an application's startup if the user interface has a lot of text, or multiple fonts, or a large amount of distinct characters, e.g. in CJK writing systems qdistancefieldgenerator qdoc is a tool used by Qt Developers to generate documentation for software projects qdoc qmake uses information stored in project files to determine what should go in the makefiles it generates qmake qml executes a QML file qml qmleasing is a tool used to define the easing curves using an interactive curve editor qmleasing qmlformat formats QML files according to the QML coding conventions qmlformat qmllint is a syntax checker for QML files qmllint qmlplugindump is a tool to create a qmltypes file qmlplugindump qmlpreview is a tool used to analyze QML applications qmlpreview qmlprofiler is a tool which watches QML and JavaScript files on disk and updates the application live with any changes qmlprofiler qmlscene is a utility that loads and displays QML documents even before the application is complete qmlscene qmltestrunner is a tool used to make tests qmltestrunner qtdiag is a tool for reporting diagnostic information about Qt and its environment qtdiag qtpaths is a tool to query Qt path information qtpaths qtplugininfo dumps meta-data about Qt plugins in JSON format qtplugininfo