Question

Mac OS X (Cocoa)
NSSetUncaughtExceptionHandler

Windows
SetUnhandledExceptionFilter

Is there a platform independent way to do this using Qt?

Answer 1

What about obvious handler in main()?
I mean your application have following lines:

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

What about simple wrap it with:

try{
   QApplication a(argc, argv);
   ...
}
catch //catches any previously unhandled
{
    //do graceful exit
}