In file included from about_dialog.cpp:25:0:
./ui_about_dialog.h:13:25: fatal error: QtGui/QAction: No such file or directory
compilation terminated.
This error is however quite logical, since the file QAction has moved from QtGui to QtWidgets in qt5.
qt4: /usr/include/qt4/QtGui/QAction
qt5: /usr/include/qt/QtWidgets/QAction
Thus this error is simply due to wireshark not being compatible with qt5 yet.
Note that replacing QtGui/QAction by QtWidgets/QAction results in a whole different set of errors, sadly it's not that simple ;).
Kind regards
Gerlof Fokkema