Qt Socket problems - c++

Question

I can't figure out why I'm getting these errors. I'm using Qt 4.7.4. I'm trying to make a client/server program which uses sockets to communicate. I have working code (works in visual studio 2008) with the winsock2 library. This code refuses to work with Qt, I tried for a a couple of days. I keep getting linker errors, so I decided to try to start from scratch with QTcpSocket. I included all the required include paths in the .pro file, and I am getting linker errors.
This is my client class:
toplevelcomms.h
#ifndef TOPLEVELCOMMS_H
#define TOPLEVELCOMMS_H
#include <QObject>
#include "inireader.h"
#include "WinSock2.h"
#include <QDialog>
#include <qtcpsocket.h>
#include <qhostaddress.h>
/** This class sends/receives information through sockets.
*
*/
class TopLevelComms : public QObject
{
Q_OBJECT
public:
TopLevelComms(QString hostIP, quint16 hostPort);
void connect();
private:
QTcpSocket *tcpSocket;
QHostAddress hostAddress;
quint16 hostPort;
};
#endif // TOPLEVELCOMMS_H
toplevelcomms.cpp
#include "toplevelcomms.h"
#include "stdio.h"
TopLevelComms::TopLevelComms(QString hostIP, quint16 hostPort)
{
tcpSocket = new QTcpSocket();
hostAddress.setAddress(hostIP);
this->hostPort = hostPort;
}
void TopLevelComms::connect(){
//tcpSocket->connectToHost();
}
This is the .pro file
include( $${PWD}/../qwtbuild.pri )
include( $${PWD}/../qwtconfig.pri )
QT += core gui
TARGET = TSLSuite
TEMPLATE = app
... // *all my files are declared here*
CONFIG += qwt
INCLUDEPATH += $${PWD}/../include
INCLUDEPATH += C:/QtSDK/Desktop/Qt/4.7.4/msvc2008/include/Qt
INCLUDEPATH += C:/QtSDK/Simulator/Qt/msvc2008/bin
INCLUDEPATH += C:/QtSDK/Simulator/Qt/msvc2008/include/QtNetwork
LIBS += -LC:/Qwt-6.0.1/lib -lqwt
LIBS += -LC:/Qt/4.7.4/lib -lQtSvg
This is the output :
11:33:57: Running build steps for project TSLSuite...
11:33:57: Configuration unchanged, skipping qmake step.
11:33:57: Starting: "C:\QtSDK\QtCreator\bin\jom.exe"
C:\QtSDK\QtCreator\bin\jom.exe -nologo -j 2 -f Makefile.Release all
linking release\TSLSuite.exe
toplevelcomms.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall QHostAddress::~QHostAddress(void)" (__imp_??1QHostAddress##QAE#XZ) referenced in function __unwindfunclet$??0TopLevelComms##QAE#VQString##G#Z$0
toplevelcomms.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: bool __thiscall QHostAddress::setAddress(class QString const &)" (__imp_?setAddress#QHostAddress##QAE_NABVQString###Z) referenced in function "public: __thiscall TopLevelComms::TopLevelComms(class QString,unsigned short)" (??0TopLevelComms##QAE#VQString##G#Z)
toplevelcomms.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall QTcpSocket::QTcpSocket(class QObject *)" (__imp_??0QTcpSocket##QAE#PAVQObject###Z) referenced in function "public: __thiscall TopLevelComms::TopLevelComms(class QString,unsigned short)" (??0TopLevelComms##QAE#VQString##G#Z)
toplevelcomms.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall QHostAddress::QHostAddress(void)" (__imp_??0QHostAddress##QAE#XZ) referenced in function "public: __thiscall TopLevelComms::TopLevelComms(class QString,unsigned short)" (??0TopLevelComms##QAE#VQString##G#Z)
toplevelcomms.obj : error LNK2001: unresolved external symbol "public: virtual struct QMetaObject const * __thiscall QTcpSocket::metaObject(void)const " (?metaObject#QTcpSocket##UBEPBUQMetaObject##XZ)
toplevelcomms.obj : error LNK2001: unresolved external symbol "public: virtual void * __thiscall QTcpSocket::qt_metacast(char const *)" (?qt_metacast#QTcpSocket##UAEPAXPBD#Z)
toplevelcomms.obj : error LNK2001: unresolved external symbol "public: virtual int __thiscall QTcpSocket::qt_metacall(enum QMetaObject::Call,int,void * *)" (?qt_metacall#QTcpSocket##UAEHW4Call#QMetaObject##HPAPAX#Z)
toplevelcomms.obj : error LNK2001: unresolved external symbol "public: virtual bool __thiscall QAbstractSocket::isSequential(void)const " (?isSequential#QAbstractSocket##UBE_NXZ)
toplevelcomms.obj : error LNK2001: unresolved external symbol "public: virtual void __thiscall QAbstractSocket::close(void)" (?close#QAbstractSocket##UAEXXZ)
toplevelcomms.obj : error LNK2001: unresolved external symbol "public: virtual bool __thiscall QAbstractSocket::atEnd(void)const " (?atEnd#QAbstractSocket##UBE_NXZ)
toplevelcomms.obj : error LNK2001: unresolved external symbol "public: virtual __int64 __thiscall QAbstractSocket::bytesAvailable(void)const " (?bytesAvailable#QAbstractSocket##UBE_JXZ)
toplevelcomms.obj : error LNK2001: unresolved external symbol "public: virtual __int64 __thiscall QAbstractSocket::bytesToWrite(void)const " (?bytesToWrite#QAbstractSocket##UBE_JXZ)
toplevelcomms.obj : error LNK2001: unresolved external symbol "public: virtual bool __thiscall QAbstractSocket::canReadLine(void)const " (?canReadLine#QAbstractSocket##UBE_NXZ)
toplevelcomms.obj : error LNK2001: unresolved external symbol "public: virtual bool __thiscall QAbstractSocket::waitForReadyRead(int)" (?waitForReadyRead#QAbstractSocket##UAE_NH#Z)
toplevelcomms.obj : error LNK2001: unresolved external symbol "public: virtual bool __thiscall QAbstractSocket::waitForBytesWritten(int)" (?waitForBytesWritten#QAbstractSocket##UAE_NH#Z)
toplevelcomms.obj : error LNK2001: unresolved external symbol "protected: virtual __int64 __thiscall QAbstractSocket::readData(char *,__int64)" (?readData#QAbstractSocket##MAE_JPAD_J#Z)
toplevelcomms.obj : error LNK2001: unresolved external symbol "protected: virtual __int64 __thiscall QAbstractSocket::readLineData(char *,__int64)" (?readLineData#QAbstractSocket##MAE_JPAD_J#Z)
toplevelcomms.obj : error LNK2001: unresolved external symbol "protected: virtual __int64 __thiscall QAbstractSocket::writeData(char const *,__int64)" (?writeData#QAbstractSocket##MAE_JPBD_J#Z)
toplevelcomms.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __thiscall QTcpSocket::~QTcpSocket(void)" (__imp_??1QTcpSocket##UAE#XZ) referenced in function "public: virtual void * __thiscall QTcpSocket::`scalar deleting destructor'(unsigned int)" (??_GQTcpSocket##UAEPAXI#Z)
release\TSLSuite.exe : fatal error LNK1120: 19 unresolved externals
jom 1.0.6 - empower your cores
command failed with exit code 1120
command failed with exit code 2
11:33:58: The process "C:\QtSDK\QtCreator\bin\jom.exe" exited with code 2.
Error while building project TSLSuite (target: Desktop)
When executing build step 'Make'
I've been getting many frustrating problems with Qt...I can never seem to find out how to properly add libraries, and every new thing I try takes forever to get working...am I missing something??
Please answer the following questions:
What is wrong with my current code, and how do I fix it?
What am I doing wrong with Qt? Why is it so hard for me to use new libraries and classes?

Answer 1

In your .pro file you need to add the network module:
QT += core gui network