qt.qpa.plugin: Could not find the Qt platform plugin
Unsolved
Installation and Deployment
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@al072072 Just realized that the plug-ins were not found. My suggestion was for cases where plug-ins are found but fail to load, so useless for your problem.
The error messages in your first post clearly say that these plug-ins where not found. Check whether they were built (configure script says what is enabled and what not).
Also, do you really need a static Qt build?
This is not enough:
sudo apt install libxcb-xinerama0 sudo apt install qt6-waylandyou also need the dev packages.
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@jsulm
I am sure this plugins (xcb,wayland) were not built becase i checked the plugins platfroms folder and there is no plugins files inside of it. I am not sure about the static build (just want to set it up like in my windows project) and run it as a static (there is no problems with dynamic build). Thank you for information i will try to find a dev libs and install them. What should i do after installing the dev libs? It seems like i need to rebuild the Qt library, is it possible to force disabling the plugins use during the build configuration process? I already tried -skip xcb and -skip wayland, but it didn't help still got the errors when Run the app. -
@al072072 said in qt.qpa.plugin: Could not find the Qt platform plugin:
I already tried -skip xcb and -skip wayland, but it didn't help still got the errors when Run the app.
Well, for graphical Qt applications you need at least one backend. On Linux usually xcb or wayland. So, first decide what you need and then disable what you do not need.
"but it didn't help still got the errors when Run the app" - of course, how should your app run without any backend? -
@jsulm
i also tried to make a configuration without skipping both of (xcb and wayland) - the same result. I've checked the dev packages for :sudo apt install libxcb-xinerama0-dev sudo apt install qt6-wayland-devpackages are installed.
Now i reconfigure the build with the following configuration string:
./configure -release -static -static-runtime -opensource -confirm-license -nomake examples -nomake tests -prefix /home/Qt/6.7.0/static_gcc_64Here is configuration output:
-- Configure summary: Building for: linux-g++ (x86_64, CPU features: ) Compiler: gcc 11.4.0 Build options: Mode ................................... release Optimize release build for size ........ no Fully optimize release builds (-O3) .... no Building shared libraries .............. no Using ccache ........................... no Unity Build ............................ no Using new DTAGS ........................ yes Relocatable ............................ no Using precompiled headers .............. yes Using Link Time Optimization (LTCG) .... no Using Intel CET ........................ yes Target compiler supports: x86 Intrinsics ....................... Basic VAES AVX512VBMI2 Sanitizers: Addresses ............................ no Threads .............................. no Memory ............................... no Fuzzer (instrumentation only) ........ no Undefined ............................ no Build parts ............................ libs tools Install examples sources ............... no Qt modules and options: Qt Concurrent .......................... yes Qt D-Bus ............................... yes Qt D-Bus directly linked to libdbus .... no Qt Gui ................................. yes Qt Network ............................. yes Qt PrintSupport ........................ yes Qt Sql ................................. yes Qt Testlib ............................. yes Qt Widgets ............................. yes Qt Xml ................................. yes Support enabled for: Using pkg-config ....................... no Using vcpkg ............................ no udev ................................... no OpenSSL ................................ no Qt directly linked to OpenSSL ........ no OpenSSL 1.1 ............................ no OpenSSL 3.0 ............................ no Using system zlib ...................... no Zstandard support ...................... no Thread support ......................... yes Common build options: Linker can resolve circular dependencies yes Qt Core: backtrace .............................. yes DoubleConversion ....................... yes Using system DoubleConversion ........ no CLONE_PIDFD support in forkfd .......... yes GLib ................................... no ICU .................................... no Using system libb2 ..................... no Built-in copy of the MIME database ..... yes Application permissions ................ yes Defaulting legacy IPC to POSIX ......... no Tracing backend ........................ <none> OpenSSL based cryptographic hash ....... no Logging backends: journald ............................. no syslog ............................... no slog2 ................................ no PCRE2 .................................. yes Using system PCRE2 ................... no Qt Sql: SQL item models ........................ yes Qt Network: getifaddrs() ........................... no IPv6 ifname ............................ no libproxy ............................... no Linux AF_NETLINK ....................... yes DTLS ................................... no OCSP-stapling .......................... no SCTP ................................... no Use system proxies ..................... yes GSSAPI ................................. no Brotli Decompression Support ........... no qIsEffectiveTLD() ...................... yes Built-in publicsuffix database ....... yes System publicsuffix database ......... yes Core tools: Android deployment tool ................ yes macOS deployment tool .................. no Windows deployment tool ................ no qmake .................................. yes Qt Gui: Accessibility .......................... yes FreeType ............................... yes Using system FreeType ................ no HarfBuzz ............................... yes Using system HarfBuzz ................ no Fontconfig ............................. no Image formats: GIF .................................. yes ICO .................................. yes JPEG ................................. yes Using system libjpeg ............... no PNG .................................. yes Using system libpng ................ no Text formats: HtmlParser ........................... yes CssParser ............................ yes OdfWriter ............................ yes MarkdownReader ....................... yes Using system libmd4c ............... no MarkdownWriter ....................... yes EGL .................................... yes OpenVG ................................. no OpenGL: Desktop OpenGL ....................... yes OpenGL ES 2.0 ........................ no OpenGL ES 3.0 ........................ no OpenGL ES 3.1 ........................ no OpenGL ES 3.2 ........................ no Vulkan ................................. no Session Management ..................... yes Features used by QPA backends: evdev .................................. yes libinput ............................... no HiRes wheel support in libinput ........ no INTEGRITY HID .......................... no mtdev .................................. no tslib .................................. no xkbcommon .............................. yes X11 specific: XLib ................................. yes XCB Xlib ............................. no EGL on X11 ........................... yes xkbcommon-x11 ........................ no xcb-sm ............................... no QPA backends: DirectFB ............................... no EGLFS .................................. yes EGLFS details: EGLFS OpenWFD ........................ no EGLFS i.Mx6 .......................... no EGLFS i.Mx6 Wayland .................. no EGLFS RCAR ........................... no EGLFS EGLDevice ...................... no EGLFS GBM ............................ no EGLFS VSP2 ........................... no EGLFS Mali ........................... no EGLFS Raspberry Pi ................... no EGLFS X11 ............................ no LinuxFB ................................ yes VNC .................................... yes VK_KHR_display ......................... no QNX: lgmon ................................ no IMF .................................. no XCB: Using system-provided xcb-xinput ..... no GL integrations: GLX Plugin ......................... no XCB GLX .......................... no EGL-X11 Plugin ..................... no Windows: Direct 2D ............................ no Direct 2D 1.1 ........................ no DirectWrite .......................... no DirectWrite 3 ........................ no Qt Widgets: GTK+ ................................... no Styles ................................. Fusion Windows Qt Testlib: Tester for item models ................. yes Batch tests ............................ no Qt PrintSupport: CUPS ................................... no Qt Sql Drivers: DB2 (IBM) .............................. no InterBase .............................. no MySql .................................. no OCI (Oracle) ........................... no ODBC ................................... no PostgreSQL ............................. no SQLite ................................. yes Using system provided SQLite ......... no Mimer .................................. no Further Image Formats: JasPer ................................. no MNG .................................... no TIFF ................................... yes Using system libtiff ................. no WEBP ................................... yes Using system libwebp ................. no Qt QML: QML network support .................... yes QML debugging and profiling support .... yes QML just-in-time compiler .............. yes QML XML http request ................... yes QML Locale ............................. yes QML SSL support ........................ no Qt QML: QML network support .................... yes QML debugging and profiling support .... yes QML just-in-time compiler .............. yes QML XML http request ................... yes QML Locale ............................. yes QML SSL support ........................ no Qt QML Models: QML list model ......................... yes QML delegate model ..................... yes Qt Quick: AnimatedImage item ..................... yes Canvas item ............................ yes Support for Qt Quick Designer .......... yes Flipable item .......................... yes GridView item .......................... yes ListView item .......................... yes TableView item ......................... yes TreeView item .......................... yes Path support ........................... yes PathView item .......................... yes Positioner items ....................... yes Repeater item .......................... yes ShaderEffect item ...................... yes Sprite item ............................ yes Qt Quick Templates 2: Hover support .......................... yes Multi-touch support .................... yes Calendar support ....................... yes Qt Quick Controls 2: Styles ................................. Basic Fusion Imagine Material Universal QtQuick3D: Assimp ................................. yes System Assimp .......................... no Qt Multimedia: Spatial Audio .......................... yes Spatial Audio (Quick3D) ................ yes Low level Audio Backend: ALSA (experimental) .................. no PulseAudio ........................... no MMRenderer ........................... no CoreAudio ............................ no Windows Media SDK .................... no Open SLES (Android) .................. no Web Assembly ......................... no Plugin: GStreamer 1.0 ........................ no FFmpeg ............................... no MMRenderer ........................... no AVFoundation ......................... no Windows Media Foundation ............. no Hardware acceleration and features: Video for Linux ...................... yes VAAPI support ........................ no Linux DMA buffer support ............. yes VideoToolbox ......................... no Qt 3D: Assimp ................................. yes System Assimp .......................... no Aspects: Render aspect ........................ yes Input aspect ......................... yes Logic aspect ......................... yes Animation aspect ..................... yes Extras aspect ........................ yes Qt 3D APIs: Vulkan ................................. no Qt 3D Renderers: OpenGL Renderer ........................ yes RHI Renderer ........................... yes Qt3D Geometry Loaders: Autodesk FBX ........................... no Qt 5 Compatibility Libraries: iconv .................................. yes Qt Charts Types: Area Chart ............................. yes Line Chart ............................. yes Spline Chart ........................... yes Scatter Chart .......................... yes Bar Chart .............................. yes Pie Chart .............................. yes Boxplot Chart .......................... yes Candlestick Chart ...................... yes Qt Axis Types: DateTime Axis .......................... yes Qt Bluetooth: BlueZ .................................. no BlueZ Low Energy ....................... no Linux Crypto API ....................... no WinRT Bluetooth API .................... no Qt Graphs Support: 2D Graphs .............................. yes 3D Graphs .............................. yes Qt Graphs 3D: Bars3D ................................. yes Scatter3D .............................. yes Surface3D .............................. yes Serial Port: ntddmodm ............................... no Qt Tools: Qt Assistant ........................... yes libclang found ......................... no Clang-based lupdate parser ............. no Qt Designer ............................ yes Qt Distance Field Generator ............ yes Qt Linguist ............................ yes pixeltool .............................. yes qdbus .................................. yes QDoc ................................... no Qt Attributions Scanner ................ yes qtdiag ................................. yes qtplugininfo ........................... yes WebEngine Repository Build Options: Build Ninja ............................ no Build Gn ............................... yes Jumbo Build ............................ yes Developer build ........................ no Build QtWebEngine Modules: Build QtWebEngineCore ................ no Build QtWebEngineWidgets ............. no Build QtWebEngineQuick ............... no Build QtPdf Modules: Build QtPdfWidgets ................... no Build QtPdfQuick ..................... no Optional system libraries: re2 .................................. no icu .................................. no libwebp, libwebpmux and libwebpdemux . no opus ................................. no ffmpeg ............................... no libvpx ............................... no snappy ............................... no glib ................................. no zlib ................................. no minizip .............................. no libevent ............................. no libxml2 and libxslt .................. no lcms2 ................................ no png .................................. no tiff ................................. no jpeg ................................. no libopenjpeg2 ......................... no harfbuzz ............................. no freetype ............................. no libpci ............................... no Qt 3rdparty libs: qtfreetype ........................... yes qtharfbuzz ........................... yes qtpng ................................ yes qtjpeg ............................... yes qtzlib ............................... yes Qt Protobuf: Qt Core types support ................ no Qt Gui types support ................. no Well-known types support ............. no Qt Protobuf tools: Qt Protobuf generator ................ no Qt GRPC: gRPC support ......................... yes QML gRPC support ..................... yes Qt GRPC tools: Qt GRPC generator .................... no sql storage ............................ yes sql with zlib compression .............. no sql with zstd compression .............. no Qt Opcua: Open62541 ............................ yes Support for namespace 0 NodeId names . yes Internal code generator .............. no Open62541 security support ........... no Support for global discovery server .. no Data type code generator ............. yes Qt Remote Objects: High Availability Manager (ham) ...... no Qt Scxml: ECMAScript data model for QtScxml .... yes Qt Sensors: sensorfw ............................. no sensorfw_enabled_with_cmake .......... no Qt SerialBus: Socket CAN ........................... yes Socket CAN FD ........................ yes SerialPort Support ................... yes Qt TextToSpeech: Flite ................................ no Flite with ALSA ...................... no Speech Dispatcher .................... no Qt Virtualkeyboard: Desktop integration .................. yes Built-in layouts ..................... yes Key navigation ....................... no Retro style as default ............... no Sensitive Debug ...................... no Cerence .............................. no Static Linking ..................... no Handwriting ........................ no Alphabetic ....................... no CJK .............................. no XT9 ................................ no XT9 Debug ........................ no XT9 9-key layouts ................ no Bundle resources ................... no Handwriting ...................... no XT9 .............................. no Hunspell ............................. no Using Hunspell copy from 3rdparty/ . no OpenWnn .............................. yes MyScript ............................. no Example HWR .......................... no Language support enabled for: Arabic ............................. yes Bulgarian .......................... yes Czech .............................. yes Danish ............................. yes German ............................. yes Greek .............................. yes English GB ......................... yes English US ......................... yes Spanish ............................ yes Spanish Mexico ..................... yes Estonian ........................... yes Farsi .............................. yes Finnish ............................ yes French Canada ...................... yes French France ...................... yes Hebrew ............................. yes Hindi .............................. yes Croatian ........................... yes Hungarian .......................... yes Indonesian ......................... yes Italian ............................ yes Japanese ........................... yes Korean ............................. yes Malay .............................. yes Norwegian .......................... yes Dutch .............................. yes Polish ............................. yes Portuguese Brazil .................. yes Portuguese Portugal ................ yes Romanian ........................... yes Russian ............................ yes Slovak ............................. yes Slovenian .......................... yes Albanian ........................... yes Serbian ............................ yes Swedish ............................ yes Thai ............................... yes Turkish ............................ yes Ukrainian .......................... yes Vietnamese ......................... yes Simplified Chinese ................. yes Traditional Chinese ................ yes HongKong Chinese ................... no Traditional chinese input methods: Zhuyin ............................. yes Cangjie ............................ yes Note: Using static linking will disable the use of dynamically loaded plugins. Make sure to import all needed static plugins, or compile needed modules into the library. Note: Hunspell in Qt Virtual Keyboard is not enabled. Spelling correction will not be available. WARNING: Feature static_runtime is insignificant in this configuration, ignoring related command line option(s). WARNING: No backend for low level audio found. WARNING: QDoc will not be compiled, probably because clang's C and C++ libraries could not be located. This means that you cannot build the Qt documentation. You may need to set CMAKE_PREFIX_PATH or LLVM_INSTALL_DIR to the location of your llvm installation. Other than clang's libraries, you may need to install another package, such as clang itself, to provide the ClangConfig.cmake file needed to detect your libraries. Once this file is in place, the configure script may be able to detect your system-installed libraries without further environment variables. On macOS, you can use Homebrew's llvm package. You will also need to set the FEATURE_clang CMake variable to ON to re-evaluate this check. WARNING: Clang-based lupdate parser will not be available. LLVM and Clang C++ libraries have not been found. You will need to set the FEATURE_clangcpp CMake variable to ON to re-evaluate this check. WARNING: QtWebEngine won't be built. Static build is not supported. WARNING: QtPdf won't be built. node.js version 14 or later is required. WARNING: SensorFW support currently not enabled with cmake -- Qt is now configured for building. Just run 'cmake --build . --parallel' Once everything is built, you must run 'cmake --install .' Qt will be installed into '/home/Qt/6.7.0/static_gcc_64' To configure and build other Qt modules, you can use the following convenience script: /home/Qt/6.7.0/static_gcc_64/bin/qt-configure-module If reconfiguration fails for some reason, try removing 'CMakeCache.txt' from the build directory -- Configuring done -- Generating done -- Build files have been written to: /home/alex/Qt/6.7.0/SrcCould you please take a look on it and advice me to do any additional steps for configuration that i will be able to run the static version of app after build? thank you
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@al072072 said in qt.qpa.plugin: Could not find the Qt platform plugin:
X11 specific:
XLib ................................. yes
XCB Xlib ............................. no
EGL on X11 ........................... yes
xkbcommon-x11 ........................ no
xcb-sm ............................... noHow to make it more obvoius that there is some X11 stuff missing?
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@Christian-Ehrlicher said in qt.qpa.plugin: Could not find the Qt platform plugin:
How to make it more obvoius that there is some X11 stuff missing?
Thank you for reply, i am very new to Qt excuse me for a nubies questions, but could you please advice what additional libraries should be installed to ubuntu environment to make a plugins support is ON?
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@al072072 said in qt.qpa.plugin: Could not find the Qt platform plugin:
where the ./configure file is located
The log file is in the build folder, not where configure script is located...
