Sorry, total Qt newbe question...

10Degree

I am sorry, I am sure this is really a dumb/dorky question but can someone explain to me why this code does not build? I get:

undefined reference to `_imp___ZN10QUdpSocketC1EP7QObject'

on the line that declares the QUdpSocket. This is a command line application. I must not understand some basic -QT- Qt concept here...

@
#include <QtCore/QCoreApplication>
#include <QtNetwork/QUdpSocket>

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QUdpSocket udp;
return a.exec();
}
@
EDIT: please use @-tags for code highlighting, Gerolf
Edit 2: the toolkit we're working with is called Qt, not QT; Andre

SimonL

you probably need to add QT += network to your .pro file to include the network libs

Chuck Gao

A general error here:)
Qt means what we use, and QT means QuickTime. Make sure you use the correct one :)

10Degree

Thanks for the help - that worked great! I am assuming that adding this reference to the .pro file is similar to adding references to libraries in Visual Studio (as in VB or C#, etc)? I found this reference (http://doc.qt.nokia.com/4.7-snapshot/qmake-variable-reference.html) that explains the use of the "QT" variable that I edited in the .pro file. Is anyone aware of any other documentation that explains when, or under what circumstances you would need to edit the .pro file?

Chuck Gao

Look at "Advanced qmake" :)