Compiling issues in Qt5.12.12 Ubuntu20.04

[nihenniuma]

qglviewer.cpp: In member function'void QGLViewer::setCamera(qglviewer::Camera*)': qglviewer.cpp:684:14: error: 'screen' was not declared in this scope;did you mean 'QScreen'?

[nihenniuma]

libQGLViewer-2.9.1

[niko-zvt]

@nihenniuma
I ran into the same problem when building on Apple M2 Pro (clang x64, macosx13.3, qt 5.9.9).
The explicit screen selection helped me. This may not work for multi-screen systems. You will need to select a specific screen.

QScreen *screen = QGuiApplication::primaryScreen();

For example:

camera->setDevicePixelRatio(screen->devicePixelRatio());

@GillesDebunne
it seems that the screen() function is not available in a UNIX-environment. Is explicit screen selection enough, as I presented above?