Webengine example fail with "Unknown module(s) in QT: webengine"

[magiclevinho]

Hi fellow developers,

I'm using Windows 7 and just installed QT 5.7 from the online installer. I checked that webengine is ticked at the installation process. Nonetheless I m unable to run the webengine examples with the error message "Unknown module(s) in QT: webengine".
What am I missing?

[adutzu89]

Add webengine to the project .pro file
Example:

• QT += webengine
• or append webengine to the list of QT values in .pro file

Also in main.cpp file add QtWebEngine::initialize(); after QGuiApplication app(argc, argv);

[magiclevinho]

So when I start the "simplebrowser" example project with 5.7.0 Mingw KIT, then I get these output error messages:
10:51:40: Running steps for project simplebrowser...
10:51:40: Starting: "C:\Qt\5.7\mingw53_32\bin\qmake.exe" C:\Qt\Examples\Qt-5.7\webenginewidgets\simplebrowser\simplebrowser.pro -spec win32-g++ "CONFIG+=debug" "CONFIG+=qml_debug"
Project ERROR: Unknown module(s) in QT: webenginewidgets
10:51:41: The process "C:\Qt\5.7\mingw53_32\bin\qmake.exe" exited with code 3.
Error while building/deploying project simplebrowser (kit: Desktop Qt 5.7.0 MinGW 32bit)
When executing step "qmake"

If I try to change the KIT to MSVC 2013 or 2015 I get this:
Error while building/deploying project simplebrowser (kit: Desktop Qt 5.7.0 MSVC2015 32bit)
When executing step "qmake"

I shifted to Windows 10 and the problem still occurs.

[aatwo]

I don't believe QWebEngine is installed by default. Go to your Qt installation folder and run the Qt Maintenance tool. Select the option to 'Add or remove components' and click next. If you expand the the tree for your Qt version (e.g. Qt 5.7) you should see a component called "Qt WebEngine" in the list. Make sure that is checked and click next to install it if required.

[magiclevinho]

@aatwo Thanks for reply! Although as I stated the webengine is checked and installed. I have tried installing under linux also but with the same result!

[SGaist]

Hi and welcome to devnet,

QtWebEngine is only available for Visual Studio 2013 and 2015.

When you say: "change the Kit", do you mean you installed Qt for either VS2013 and VS2015 ?

[magiclevinho]

@SGaist Yes I installed the for VS2013 and 2015 also. I'm also installed VS2015 application, but after the QT.

[magiclevinho]

@magiclevinho When I go to the Projects tab -> manage kits, then for the msvc 2015 it says no compiler set. How can I set a compiler?

[mrjj]

@magiclevinho

• "C:\Qt\5.7\mingw53_32\bin"

Just so we are very clear on this.
The Qt Vs201X kits do NOT work with mingw.
You must also download the full vs 2013 or 2015 COMPILER from microsoft
and switch to that full compiler. So Besides the Qt kits, you should also have installed
the actual compiler. as its not included same way as mingw kit.
(its not allowed)

[magiclevinho]

@mrjj Thanky for the reply! I had to make my first c++ project in VS 2015 and it installed the neccessary compiler!

[SGaist]

So you have it all working now ?

[cdietz]

After some time I found this information, which does not seem to be published elsewhere:

"MSVC2013 is not supported anymore in Qt WebEngine"
Source: https://bugreports.qt.io/browse/QTBUG-56299

And while I am at it (it took me some time to find this link):
https://www.visualstudio.com/downloads/#visual-studio-community-2015-with-update-3-free

[PSI_lbc]

Project ERROR: Unknown module(s) in QT: webenginewidgets

Initial searching for a solution on the web shows this has been a problem for a number of years.

QTBUG-43614 webenginewidgets examples does not build on Windows
https://bugreports.qt.io/browse/QTBUG-43614
QTBUG-44108 webenginewidgets examples does not build on Windows (second try)
https://bugreports.qt.io/browse/QTBUG-44108

Both of the above QTBUG items are marked as closed. Obviously they are not.

Yes..I have QT += webenginewidgets set in the .pro file.

Windows7 Pro SP1 32 bit OS. Creator4.2.0 Qt5.7.1. from this download..

qt-opensource-windows-x86-mingw530-5.7.1

The exact same project built on OSX using Creator4.2.0 Qt5.7.1. compiles and runs properly.

Do I need to download and install BS compilers from Microsoft to get this to work? If so, do I need a different Qt download in order to use the MSBS compilers??

Do I need to upgrade to a different OS..Win8 or Win10? Or Maybe Win7 Pro 64 bit??

Is there a solution for Windows7 Pro SP1 32 bit OS??

[SGaist]

The QtWebEngine platform notes explain what is needed to build the module.

QtWebEngine is using the Chromium project as backend so it depends on what platform they support. If you would like to have a MinGW build of QtWebEngine then you should rather push this to the Chromium project.

On a side note, there's @Konstantin-Tokarev QtWebKit reboot project that might interest you.

[Konstantin Tokarev]

Note that we provide QtWebKit TP5 binaries compatible with official Qt 5.8.0 MinGW build: https://github.com/annulen/webkit/releases/tag/qtwebkit-tp5

[PSI_lbc]

@SGaist

Thx for the reply. I made a mistake downloading the open source install.
I am now using: qt-unified-windows-x86-2.0.5-online.exe...and have a current Commercial License for Application Development..all handheld and desktop environments are covered.

I tried installing Qt5.7.1 for MinGW but there were no QtWebEngine libraries.
I tried installing Qt5.7.1 for MSVC2015 and it had the QtWebEngine libraries, but no compiler.

I am now re-installing 5.8, 5.7, and 5.6. Maybe one of those will have the libraries I need.

[PSI_lbc]

@Konstantin-Tokarev

Thx for the heads up.

Are the 5.8/Webkit binaries also available for MacOS-clang64 environments?

[Konstantin Tokarev]

@PSI_lbc Yeah, see the same link. Also there are binaries for 64-bit Linux and VS 2015 (both 32-bit and 64-bit)

[mrjj]

@Konstantin-Tokarev
Thank you for all your work. its a huge task for a beginner to build webkit so your project
is very welcome.

[Konstantin Tokarev]

@mrjj As for these binary packages, credits go to CI infrastructure of The Qt Company, and personally to Simon Hausmann who helped a lot with integration of new QtWebKit's build system into Coin.

Also credits go to Vitaly Slobodin and other contributors of revived QtWebKit, who contributed lots of patches enhancing Windows and macOS support. Without them, it could happen that only Linux would be supported.