mainwindow.cpp: In member function ‘void MainWindow::setupSound()’:
mainwindow.cpp:87: error: invalid use of undefined type ‘const struct Configuration’
global.h:22: error: forward declaration of ‘const struct Configuration’
mainwindow.cpp: In member function ‘void MainWindow::open()’:
mainwindow.cpp:194: error: invalid use of undefined type ‘const struct Configuration’
global.h:22: error: forward declaration of ‘const struct Configuration’
mainwindow.cpp: In member function ‘void MainWindow::save()’:
mainwindow.cpp:260: error: invalid use of undefined type ‘const struct Configuration’
global.h:22: error: forward declaration of ‘const struct Configuration’
mainwindow.cpp: In member function ‘virtual void MainWindow::keyPressEvent(QKeyEvent*)’:
mainwindow.cpp:405: error: invalid use of undefined type ‘const struct Configuration’
global.h:22: error: forward declaration of ‘const struct Configuration’
make: *** [build/mainwindow.o] Error 1