QHostInfo

[IbisMojo]

I'm new to QT and trying to get the host computer name and ip address. From what I can tell I should be using QHostInfo, but when I include this I get error's when compiling. I'm using QT Creator. Here's the details:

Including in my .h file:

@
#include <QtNetwork/QHostInfo>
@

I then have a function that will do the following:

@
QHostInfo hostInfo;
hostInfo = QHostInfo::fromName(QHostInfo::localHostName());
QString hostName = QHostInfo::localHostName();
qDebug() << hostName;
@

I then do a clean bulid, next run qMake, and then compile.

When compiling, I'm getting the error:
debug/mainwindow.o:C:\dev\qt\learning\helloworld-build-desktop-Qt_4_7_4_for_Desktop_-_MinGW_4_4__Qt_SDK__Debug/../helloworld/mainwindow.cpp:58: undefined reference to `_imp___ZN9QHostInfoC1Ei'

I get a lot of these error messages.

I don't know what is causing this error, any help would be appriciated.

thanks.

[EDIT: code formatting, please wrap in @-tags, Volker]

[p-himik]

In your project's .pro file you have to write "QT += network" without quotes.
For future posts - wrap your code in @ symbols.

[IbisMojo]

Thank you for the help. As I learn QT I would like to know where to find this kind of information in documentation. If you know, where would this be found.

[lgeyer]

Every class in Qt belongs to a "module":http://developer.qt.nokia.com/doc/qt-4.8/modules.html, for "QHostInfo":http://developer.qt.nokia.com/doc/qt-4.8/qhostinfo.html this is "QtNetwork":http://developer.qt.nokia.com/doc/qt-4.8/qtnetwork.html, whose documentation states:
[quote]To link against the module, add this line to your qmake .pro file:
<code>QT += network</code>[/quote]