clang version 5.0.0 (tags/RELEASE_500/final 312548)
Qt 5.10, openSuse 42.2
[ 91%] Building CXX object src/conf/CMakeFiles/kcm_kleopatra.dir/appearanceconfigpage.cpp.o
/home/KDE5/source/kde/pim/kleopatra/src/conf/appearanceconfigpage.cpp:52:89: error: 'changed' is a protected member of 'KCModule'
connect(mWidget, &AppearanceConfigWidget::changed, this, QOverload<>::of(&KCModule::changed)); ~~~~~~~~~~^~~~~~~
/usr/include/KF5/KConfigWidgets/kcmodule.h:377:10: note: must name member using the type of the current context 'Kleo::Config::AppearanceConfigurationPage'
void changed(); ^
1 error generated.
etc.