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I am trying to create deb of QT 5.5 app which uses QT5 webkit and webkitwidgets in it. When I am trying to create deb with command "debuild -kMYGPGKEY" then it gives me below error.

/usr/bin/ld: warning: libQt5WebChannel.so.5, needed by /home/myusername/Qt5.5.0/5.5/gcc_64/lib/libQt5WebKit.so.5.5.0, not found (try using -rpath or -rpath-link)

/home/myusername/Qt5.5.0/5.5/gcc_64/lib/libQt5WebKit.so.5.5.0: undefined reference to `QAccelerometer::QAccelerometer(QObject*)'
/home/myusername/Qt5.5.0/5.5/gcc_64/lib/libQt5WebKit.so.5.5.0: undefined reference to `QRotationReading::x() const'

any many more these types of undefined reference errors.

From the error I found that libQt5WebKit is taking the reference libQt5WebChannel which is not found in my machine.

So if anybody has any idea about the issue or how can I install libqt5webchannel.so.5 in Ubuntu 16.04 then please let me know.

Thanks.

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3
  • (lib)qt5webchannel-devel-5.x.x is available for "all" new 'Linux OS´s' , except Debian and Debian clones like Ubuntu, Mint. ...
    – Knud Larsen
    Jul 2, 2016 at 14:23
  • What is the output of: lsb_release -a
    – ActionParsnip
    Jul 2, 2016 at 19:11
  • Here is the output of lsb_release -a - No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 16.04 LTS Release: 16.04 Codename: xenial
    – User2546
    Jul 4, 2016 at 5:24

2 Answers 2

Reset to default
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(Run into a similar problem with https://github.com/GPUOpen-Tools/CodeXL)

Solution :

sudo apt install libqt5webchannel5-dev

Explication

The good habit is to look onto https://packages.ubuntu.com/zesty/libqt5webchannel5-dev site with the missing file/library name and change "package names" into "package contents" at the bar search.

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Building qt5webchannel :

git clone git://code.qt.io/qt/qtwebchannel.git
qmake-qt5
make
sudo make install

EDIT : Sorry, fails with Ubuntu16.04 :

No /usr/include/x86_64-linux-gnu/qt5/QtGui/QApplication ... That could be the reason for no qtwebchannel in Debian, Ubuntu : A less complete Qt5 ?

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  • Yes Knud Larsen, this path /usr/include/x86_64-linux-gnu/qt5/QtGui/QApplication is not exist in 16.04. I need to create deb of QT 5.5 app in 16.04. So is there any alternate way to install qtwebchannel in Ubuntu 16.04 machine ?
    – User2546
    Jul 4, 2016 at 5:53
  • 1
    » install qtwebchannel in Ubuntu 16.04 machine « : I don't know. What I know is : Easy to build in rpm based OS. They use a different Qt5 structure / patching. Besides that, it is already available for install, as packages, in : Fedora, PCLinuxOS 2016, Mageia, Suse. .... » I need to create deb ... 16.04 « : Well, nobody else did, I think. I can try if a build from an rpm based OS can be installed in 16.04 .
    – Knud Larsen
    Jul 4, 2016 at 21:51
  • Knud Larsen, Thanks for your comment. I will do more research on the same to solve qt5 web channel issue.
    – User2546
    Jul 5, 2016 at 5:15
  • Now I am not getting libqt5webchannel.so.5 missing error (which is dependency of qt webkit) in Ubuntu 16.04. Till now I was using Ubuntu 14.04 compatible debian/rule file in Ubuntu 16.04 machine during creating debian package. I just made changes in debian/rule file as per Ubuntu 16.04 and it works. But I did not know how to install qt5webchannel in Ubuntu 16.04.
    – User2546
    Jul 5, 2016 at 15:05

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