[Solved] [Linux] Unknown module(s) in QT: webkitwidgets

[vitb]

Hi,

I know this question is not new, but I coundn't find an answer that helps me.

OS: Linux Mint
Qt: 5.3.0
Qt Creator: 3.1.81

I downloaded Qt and compiled it with
./init-repository
./configure -developer-build
make

I downloaded Qt Creator and compiled it with
qmake qtcreaotr.pro -recursive
make

Then in Qt Creator I set the path to the compiled qmake, for example:
/home/dev/qt5.3.0/qtbase/bin/qmake

When I add to the *.pro file QT += webkitwidgets it says
Project ERROR: Unknown module(s) in QT: webkitwidgets

-Maybe I don't have some packages installed, but I don't know which.-

Edit: I have to correct myself. I have two Qt Creator versions. One, let's call it A, I installed with the online installer, and one, let's call it B, I compiled myself as described before. Qt Creator A recognizes the WebKit, if i point it to its qmake. But Qt Creator B cannot find it.

Maybe I must make some configuration to compile Qt with WebKit or point Qt Creator B to the WebKit.

[clochydd]

Hi, you should use QT += webkit

[vitb]

This gives me the same error.
Project ERROR: Unknown module(s) in QT: webkit

[clochydd]

Did you #include <QtWebKitWidgets>
or - with QT += webkit #include <QtWebKit>

EDIT:
check if libqt5webkit is installed
sudo apt-get install libqt5webkit5-dev

[vitb]

I updated my original post.

Only the Qt Creator that I compiled myself can not find WebKit. The other Qt Creator, that I installed with the online installer, has no problems. So the problem is not the missing packages, but maybe how I compiled or configured my Qt Creator.

It's no use to try #include <QtWebKitWidgets> or #include <QtWebKit> when the WebKit can not be found by Qt Creator, and neither QT += webkit, nor QT += webkitwidgets work.

[clochydd]

I've read your updated post and again read through the Qt Doc. I agree it must be an issue with compiling! Good luck!

[vitb]

Ok, I solved the problem with the help of a guy from the #qt IRC channel.

It seems that the module qtwebkit isn't built while compiling Qt. To compile qtwebkit change into directory qtwebkit:

• cd <qt path>/qtwebkit

Create/configure Makefile:

• ../qtbase/bin/qmake

Compile qtwebkit:

• make

I don't know whether the missing compilation of qtwebkit is the expected behaviour.

PS: Compilation of qtwebkit takes a half hour on i7-4770k.