mainwindows.h
static QList<Client* > klienci;
cpp
QTcpSocket * tmp = server->nextPendingConnection();
Client * klient = new Client(tmp);
MainWindow::klienci.push_back(klient);
Server/mainwindow.cpp undefined reference to `MainWindow::klienci'
collect2: ld returned 1 exit status
czym to jest spowodowane?