QtWebEngine/How to Try
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Get the code
The source code for QtWebEngine can be found at http://code.qt.io/cgit/qt/qtwebengine.git/ .
While this is hidden away in our build system, the build relies on gyp and ninja (fetched along with the chromium sources) to build chromium, hence a build dependency to python, in addition to the usual Qt5 suspects. You currently need at least Qt 5.4 to build QtWebEngine.
Installing dependencies on Ubuntu
sudo apt-get install bison build-essential gperf flex ruby python libasound2-dev libbz2-dev libcap-dev \ libcups2-dev libdrm-dev libegl1-mesa-dev libgcrypt11-dev libnss3-dev libpci-dev libpulse-dev libudev-dev \ libxtst-dev gyp ninja-build
Installing additional dependencies on Ubuntu 16.04
sudo apt-get install libssl-dev libxcursor-dev libxcomposite-dev libxdamage-dev libxrandr-dev \ libfontconfig1-dev libxss-dev libsrtp0-dev libwebp-dev libjsoncpp-dev libopus-dev libminizip-dev \ libavutil-dev libavformat-dev libavcodec-dev libevent-dev
Please note that these libraries need to be installed on other distributions as well, though the package names and the set of libraries that are preinstalled may differ depending on the distribution used.
Installing dependencies on Fedora
sudo yum install "qt5-*" sudo yum install mesa-libEGL-devel libgcrypt-devel libgcrypt pciutils-devel nss-devel libXtst-devel gperf cups-devel pulseaudio-libs-devel libgudev1-devel systemd-devel libcap-devel alsa-lib-devel flex bison ruby
To build a release build (generally recommended) do: qmake -r CONFIG+=release
In case you cloned Qt WebEngine as a separate module from git, you might need to initialize out the src/3rdparty submodule that contains the Chromium and Ninja code:
cd qtwebengine git submodule update --init
Ensure that your $PATH points to a python version 2 binary. Many systems these days use python 3 by default.
qmake -r make sudo make install