Introduction to QtWebEngine

QtWebEngine integrates chromium"s web capabilities into Qt. It ships with its own copy of ninja which it uses for the build if it cannot find a system copy, and various copies of libraries from ffmpeg, icu, libvpx, and zlib (including libminizip) which have been forked by the chromium developers.

This package is known to build and work properly using an LFS-8.2 platform.



By default, ninja will use all online CPUs +2 (if at least 4 exist), even if they are not available to the current task because the build terminal has been restricted with 'taskset'. To work around this, see the Command Explanations below.

Package Information

qtwebengine Dependencies


NSS-3.36, PulseAudio-11.1, and Qt-5.10.1




If these packages are not installed, the build process will compile and install its own (perhaps older) version, with the side effect of increasing build and installed disk space and build time.


libevent-2.1.8, jsoncpp, libsrtp, snappy

User Notes: http://wiki.linuxfromscratch.org/blfs/wiki/qtwebengine

Installation of qtwebengine

Install qtwebengine by running the following commands:

mkdir build &&
cd    build &&

qmake ..    &&

This package does not come with a test suite.

Now, as the root user:

make install

Remove references to the build directory from installed library dependency (prl) files by running the following commands as the root user:

find $QT5DIR/ -name \*.prl \
   -exec sed -i -e '/^QMAKE_PRL_BUILD_DIR/d' {} \;

Command Explanations

qmake: This will build the included copy of ninja if it is not already installed and use it to configure the build.

NINJAJOBS=4 make: If you patched system ninja in LFS to recognize the NINJAJOBS environment variable, this command will run system ninja with the specified number of jobs (i.e. 4). Among the reasons why you might want to do this are: building on a subset of CPUs, either to measure the build time for that number of processors or to run other CPU-intensive tasks on other cores, or to improve the build speed on a less-well endowed 4-core machine. On a machine with a powerful CPU and plenty of RAM, running N+2 jobs (the ninja default for 4+ cores) for the large working sets of the C++ compiles in this package is typically only marginally slower than running 4 jobs at a time. But for a machine with less memory it might be much slower.


Installed Programs: qtwebengine_convert_dict and QtWebEngineProcess
Installed Libraries: libQt5WebEngineCore.so, libQt5WebEngine.so, and libQt5WebEngineWidgets.so
Installed Directories: $QT5PREFIX/doc/qtwebengine, $QT5PREFIX/includeQtWebEngine, $QT5PREFIX/include/QtWebEngineCore, and $QT5PREFIX/include/QtWebEngineWidgets

Short Descriptions


converts hunspell dictionaries (.dic) to chromium format (.bdic)


is a libexec program which runs a zygote process (one that listens for spawn requests from a master process and will fork itself in response).


provides QML types for rendering web content within a QML application.


provides public API shared by both QtWebEngine and QtWebEngineWidgets.


provides a web browser engine as well as C++ classes to render and interact with web content.

Last updated on 2018-02-19 17:32:22 -0600