Learn what Felgo offers to help your business succeed. Start your free evaluation today! Felgo for Your Business

Qt for X11 Requirements

Platform Plugin Dependencies

On Linux, the xcb QPA (Qt Platform Abstraction) platform plugin is used. It provides the basic functionality needed by Qt GUI and Qt Widgets to run against X11. Its library dependencies are described the following table. To build Qt from its source code, you will also need to install the development packages for these libraries for your system.

It's possible to configure Qt with -qt-xcb, which compiles in a set of xcb helper libraries instead of trying to link against the system versions. This can help make Qt less dependent on some of the xcb helper libraries that might not be available on all distributions. The table specifies which dependencies are provided by -qt-xcb.

Name Library Notes Configuration options Minimum working version
XRender libXrender X Rendering Extension; used for anti-aliasing and alpha cursor support -xrender or auto-detected 0.9.0
xcb-render libxcb-render X C Bindings for Render extension auto-detected or provided by -qt-xcb 1.8.1
xcb-render-util libxcb-render-util Utility library for XCB for Render extension auto-detected or provided by -qt-xcb 0.3.8
xcb-shape libxcb-shape X C Bindings for Shape extension auto-detected or provided by -qt-xcb 1.8.1
xcb-randr libxcb-randr X C Bindings for Resize and Rotate Extension auto-detected or provided by -qt-xcb 1.8.1
xcb-xfixes libxcb-xfixes X C Bindings for Fixes Extension auto-detected or provided by -qt-xcb 1.8.1
xcb-sync libxcb-sync X C Bindings for Sync Extension auto-detected or provided by -qt-xcb 1.8.1
xcb-shm libxcb-shm X C Bindings for Shared Memory Extension auto-detected or provided by -qt-xcb 1.8.1
xcb-icccm libxcb-icccm X C Bindings for ICCCM Protocol auto-detected or provided by -qt-xcb 0.3.9
xcb-keysyms libxcb-keysyms Utility library for XCB for keycode conversion auto-detected or provided by -qt-xcb 0.3.9
xcb-image libxcb-image Utility library for XCB for XImage and XShmImage, used for QBackingStore and cursor support auto-detected or provided by -qt-xcb 0.3.9
Fontconfig libfontconfig Font customization and configuration -fontconfig or auto-detected 2.6
FreeType libfreetype Font engine 2.2.0
Xi libXi X11 Input Extensions -xinput or auto-detected 1.3.0
Xext libXext X Extensions 6.4.3
X11 libX11 X11 client-side library 6.2.1
xcb libxcb X C Binding library 1.8.1
X11-xcb libX11-xcb Xlib/XCB interface library 1.3.2
SM libSM X Session Management -sm or auto-detected 6.0.4
ICE libICE Inter-Client Exchange -sm or auto-detected 6.3.5
glib libglib-2.0 Common event loop handling -glib or auto-detected 2.8.3
pthread libpthread Multithreading 2.3.5

Development packages for these libraries contain header files that are used when building Qt from its source code. On Debian-based GNU/Linux systems, for example, we recommend that you install the following development packages:

  • libfontconfig1-dev
  • libfreetype6-dev
  • libx11-dev
  • libxext-dev
  • libxfixes-dev
  • libxi-dev
  • libxrender-dev
  • libxcb1-dev
  • libx11-xcb-dev
  • libxcb-glx0-dev

Additionally, if you do not configure with -qt-xcb, you should also install these development packages:

  • libxcb-keysyms1-dev
  • libxcb-image0-dev
  • libxcb-shm0-dev
  • libxcb-icccm4-dev
  • libxcb-sync0-dev
  • libxcb-xfixes0-dev
  • libxcb-shape0-dev
  • libxcb-randr0-dev
  • libxcb-render-util0-dev

Some of these packages depend on others in this list, so installing one may cause others to be automatically installed. Other distributions may provide system packages with similar names.

OpenGL Dependencies

Configure attempts to automatically detect OpenGL ES 2.0, or later, or regular desktop OpenGL. You can disable OpenGL support by using the -no-opengl option.

Note: The Qt OpenGL module (which contains classes that start with QGL) has been deprecated in favor of the Qt GUI module (which contains classes that start with QOpenGL).

Multimedia Dependencies

As described in the Multimedia overview, Qt Multimedia uses the GStreamer multimedia framework as the backend for audio and video playback on Linux. The minimum required version of GStreamer is 0.10.24. The 1.x series is also supported.

To build Qt Multimedia, you need the GStreamer library, base plugins, and development files for your system. To run applications that use Qt Multimedia, you might also need to install the following GStreamer plugins: 'good', 'ugly', 'bad', ffmpeg (0.10), and libav (1.x). These additional plugins contain various codecs for audio and video decoding, as well as the necessary components for using the camera APIs. The package names for GStreamer vary between Linux distributions; try searching for gstreamer or libgstreamer in your distribution's package repository to find suitable packages.

Qt WebEngine Dependencies

Qt WebEngine has additional build requirements which are listed in the Qt WebEngine Platform Notes.

QDoc Dependencies

Since version 5.11, QDoc uses Clang to parse C++ code. If you wish to build QDoc manually, refer to Installing Clang for QDoc for specific build requirements.

Qt_Technology_Partner_RGB_475 Qt_Service_Partner_RGB_475_padded