Qt6.4.3, QNetworkInformation not working

Ang94

I am trying to test the QNetworkInformation but it is not working.
Version- Qt6.4.3 with Qt Creator 10.0.0
Platform- Windows10

Similar code was working on PyQt6.

Christian Ehrlicher

Please run with QT_DEBUG_PLUGINS=1 and make sure that <QTDIR>/plugins/networkinformation/ contains a valid plugin.

Ang94

#include <QCoreApplication>
#include<QNetworkInformation>
#include<QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    qInfo()<<QNetworkInformation::availableBackends();
    qInfo()<<QNetworkInformation::loadDefaultBackend();
    return a.exec();
}

Christian Ehrlicher

Please run with QT_DEBUG_PLUGINS=1 and make sure that <QTDIR>/plugins/networkinformation/ contains a valid plugin.

SGaist

Hi,

Beside the good hint of @Christian-Ehrlicher, can you say exactly what does not work ?
The compilation ?
At run time ?

If the former, are you using qmake or CMake ?
Did you include the Network module in your project ?

Ang94

@SGaist I'm using qmake and I have included QT+=network. This is the output I'm getting.

Ang94

@Christian-Ehrlicher Thanks it worked. When building with MSVC2019 code works fine. It doesnot works when building with MinGW.

So, I checked and found that directory <QTDIR>\6.4.3\msvc2019_64\plugins contains networkinformation plugin but <QTDIR>\6.4.3\mingw_64\plugins doesnot have networkinformation plugin.

Should I copy networkinformation plugin from msvc2019_64\plugins to mingw_64\plugins, for it to work with mingw?

Shen sida

@Christian-Ehrlicher Hi
Could you please help me to solve the problem on embedded linux system?
Here is the information for you:

the plugin could be found but it couldn't be load by QNetworkInformation::loadBackendByName(QString("networkmanager")) or QNetworkInformation::loadDefaultBackend()

Let me know if you want to get other information for you.
System: Yocto Linux 5.15 with Qt 6.4.2