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

IamSumit

Hi and welcome to devnet

in your .pro file add this line

QT += websockets

and run qmake + Build

goodsogi

It's already added.

QT += core websockets

I ran qmake. I got the same error message.

IamSumit

Hi
http://stackoverflow.com/questions/18699403/project-error-unknown-modules-in-qt-webkitwidgets

goodsogi

I followed the instruction on the link. But it didn't work.

I tried to install libqt5webkit5-dev. But I got the message:
libqt5webkit5-dev is already the newest version.

IamSumit

it could be version problem.

try to install new packeage of libqt5webkit

http://askubuntu.com/questions/378397/how-to-install-libqtwebkit5

goodsogi

I followed your suggestion.

sudo apt-get install libqt5webkit5

but it didn't work:
libqt5webkit5 is already the newest version.

Anyway, I am using qt 5.3.1 on Ubuntu 14.04.

waynix

I have the same problem using qt-everywhere-opensource-src-5.4.0.
I have cross-compiled qt for my device (arm xilinx zynq). I see that there is a libQt5WebSockets.so in my lib folder but the examples/websockets/echoclient does return the error message "Project ERROR: Unknown module(s) in QT: websockets"
EDIT
My error was that I had used the qmake from the build directory and not the qmake from the "./configure --prefix=" path

waynix

I have the same problem using qt-everywhere-opensource-src-5.4.0.
I have cross-compiled qt for my device (arm xilinx zynq). I see that there is a libQt5WebSockets.so in my lib folder but the examples/websockets/echoclient does return the error message "Project ERROR: Unknown module(s) in QT: websockets"
EDIT
My error was that I had used the qmake from the build directory and not the qmake from the "./configure --prefix=" path

sonichy

sudo apt-get install libqt5websockets5-dev

fiorentinoing

The documentation says "Since: Qt 5.3"
Check with "qmake --version" which version you have installed. Cheers.

chraz

Maybe late, but may help anyway.
Go to Tools > Options > Build & Run > Desktop (default)
Then, on Qt version, choose Qt 5 instead of Qt 4.

Hope this will resolve your issue.