#include <QtGui/QWidget>
#include <QtGui/QApplication>

class TestWidget : public QWidget
{
	Q_OBJECT

public:
	TestWidget(QWidget *parent = 0, Qt::WFlags flags = 0)
		: QWidget(parent, flags)
	{
	}
	~TestWidget(){}	
};

int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	TestWidget w;
	w.show();
	return a.exec();
}

main.obj : error LNK2001: unresolved external symbol "public: virtual struct QMetaObject const * __thiscall TestWidget::metaObject(void)const " (?metaObject@TestWidget@@UBEPBUQMetaObject@@XZ)
1>main.obj : error LNK2001: unresolved external symbol "public: virtual void * __thiscall TestWidget::qt_metacast(char const *)" (?qt_metacast@TestWidget@@UAEPAXPBD@Z)
1>main.obj : error LNK2001: unresolved external symbol "public: virtual int __thiscall TestWidget::qt_metacall(enum QMetaObject::Call,int,void * *)" (?qt_metacall@TestWidget@@UAEHW4Call@QMetaObject@@HPAPAX@Z)