Question

sys info : win xp SP3 , Microsoft Visual Studio 2008
Version 9.0.21022.8 RTM

Microsoft .NET Framework
Version 3.5 SP1

Qt Add-in 1.1.5

I installed Qt 4.6.3 from the site http://qt.nokia.com/downloads/windows-cpp-vs2008.
Then I added the Add-in Qt 1.1.5 and configured the PATH variable.

When I open a new QT project , default example works just fine.

On Nokia (qt) site I found some examples but it seems that things are not working properly.

Here is one of many examples that do not work :

#include <QtGui>
#include <QWidget>

 class QLabel;
 class QLineEdit; 
 class QTextEdit;


class AddressBook : public QWidget
 {
     Q_OBJECT

 public:
     AddressBook(QWidget *parent = 0);

 private:
     QLineEdit *nameLine;
     QTextEdit *addressText;
 };

AddressBook::AddressBook(QWidget *parent)
     : QWidget(parent)
 {
     QLabel *nameLabel = new QLabel(tr("Name:"));
     nameLine = new QLineEdit;

     QLabel *addressLabel = new QLabel(tr("Address:"));
     addressText = new QTextEdit;

     QGridLayout *mainLayout = new QGridLayout;
     mainLayout->addWidget(nameLabel, 0, 0);
     mainLayout->addWidget(nameLine, 0, 1);
     mainLayout->addWidget(addressLabel, 1, 0, Qt::AlignTop);
     mainLayout->addWidget(addressText, 1, 1);

     setLayout(mainLayout);
     setWindowTitle(tr("Simple Address Book"));
 }

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

     AddressBook addressBook;
     addressBook.show();

     return app.exec();
}

Compiler says this ::

Output Window

Linking…

main.obj : error LNK2001: unresolved external symbol “public: virtual struct QMetaObject const * __thiscall AddressBook::metaObject(void)const ” (?metaObject@AddressBook@@UBEPBUQMetaObject@@XZ)

main.obj : error LNK2001: unresolved external symbol “public: virtual void * __thiscall AddressBook::qt_metacast(char const *)” (?qt_metacast@AddressBook@@UAEPAXPBD@Z)

main.obj : error LNK2001: unresolved external symbol “public: virtual int __thiscall AddressBook::qt_metacall(enum QMetaObject::Call,int,void * *)” (?qt_metacall@AddressBook@@UAEHW4Call@QMetaObject@@HPAPAX@Z)

main.obj : error LNK2001: unresolved external symbol “public: static struct QMetaObject const AddressBook::staticMetaObject” (?staticMetaObject@AddressBook@@2UQMetaObject@@B)

C:\Documents and Settings\nik\My Documents\Visual Studio 2008\Projects\vs_03\Debug\vs_03.exe : fatal error LNK1120: 4 unresolved externals

Results

Build log was saved at “file://c:\Documents and Settings\nik\My Documents\Visual Studio 2008\Projects\vs_03\vs_03\Debug\BuildLog.htm”
vs_03 – 5 error(s), 0 warning(s)

It seems to me that the thing has to do with the use of macro Q_OBJECT but just dont know what to do that thing starts to work properly.

Maybe wrong installation or … NO IDEA

Any help is appreciated.

Answer 1

I find solution.

Read all the details about the installation on this page >>

http://dcsoft.wordpress.com/?aspxerrorpath=/community_server/blogs/dcsoft/archive/2009/03/06/how-to-setup-qt-4-5-visual-studio-integration.aspx.

After a whole day of studying and configuration, I finally managed to enable QT 4.6.3. on the VS 2008. Follow the detailed instructions and there should not be a problem.

My problem was that I used the following options:

Starting with Qt 4.6, the LPGL version now comes pre-built for Visual Studio 2008 RTM. If this fits your need, you can simply install it and skip to INSTALL VISUAL STUDIO ADD-IN.

This was wrong in my case so I go to next chapter :

DOWNLOAD QT SOURCE CODE

As the option to download only the Qt source code is a bit obfuscated on the current Nokia website, please follow these directions: ……………………………………………………………………………………………………………………………………………………………………………………………………… etc. READ ON THE SITE.

For now all works great.There are no errors in linking. MOC works fine …