title: link error compiling qt project on visual 2010
body: <p>i try to compile a qt project with visual 2010, but i have some link error when i rebuilt my solution :</p>
  
  <pre><code>error LNK2001: unresolved external symbol "public: virtual int __thiscall BNetwork::qt_metacall(enum QMetaObject::Call,int,void * *)" on bnetwork.obj
  error LNK2001: unresolved external symbol "public: virtual int __thiscall Contact::qt_metacall(enum QMetaObject::Call,int,void * *)" on contact.obj
  error LNK2001: unresolved external symbol "public: virtual struct QMetaObject const * __thiscall BNetwork::metaObject(void)const " on bnetwork.obj  
  error LNK2001: unresolved external symbol "public: virtual struct QMetaObject const * __thiscall Contact::metaObject(void)const " on contact.obj
  error LNK2001: unresolved external symbol "public: virtual void * __thiscall BNetwork::qt_metacast(char const *)" on bnetwork.obj
  error LNK2001: unresolved external symbol "public: virtual void * __thiscall Contact::qt_metacast(char const *)" on contact.obj
  </code></pre>
  
  <p>after some "googlize" i don't find some solution about this problem so 
  i put all of my Qt libs on c:/QT/4.7.4/lib/ on my project's additional dependencies, but i always have these errors...</p>
  
  <p>i'm sure that Qt is build and install on visual because when i compile this following code (it's an exemple, not my project) it works fine :</p>
  
  <pre><code>#include &lt;QtGui/qapplication.h&gt;
  #include &lt;QtGui/qpushButton.h&gt;
  
  int main(int argc, char *argv[])
  {
      QApplication app(argc, argv);
  
      QPushButton bouton("Bonjour les Zéros !");
      bouton.show();
  
      QObject::connect(&amp;bouton, SIGNAL(clicked()), &amp;app, SLOT(quit()));
  
      return app.exec();
  }
  </code></pre>
  
  <p>i haven't these errors so i think it's specific to my project but i don't find a solution</p>
  
  <p>Anyone can help me plz ?</p>