lld-link : error : undefined symbol:

Arthurfogo7

I'm trying to compile something that uses QT and this error, apparently related to dlls, is always happening. Can someone tell me whats wrong with it and how can I fix this?

The errors
The file that calls the dlls from Qt, I think

qt_metacast, qt_metacall, QAbstractButton, QComboBox,
QMetaObject, QProcess, QDialog, QLineEdit and
QObjectData::dynamicMetaObject(void) .