Kfind is using QFileDialog which uses "selectedMimeTypeFilter" method which is only available from Qt 5.9 on. So CMakeLists needs a change minimum version required from 5.6.0 to 5.9.0
Git commit c290e496fda461a11135608d022ada53bc65fdd4 by Kai Uwe Broulik, on behalf of Shubham Jangra. Committed on 07/06/2018 at 09:36. Pushed by broulik into branch 'Applications/18.04'. Changed the minimum required Qt version from 5.6.0 to 5.9.0 Differential Revision: https://phabricator.kde.org/D13399 M +1 -1 CMakeLists.txt https://commits.kde.org/kfind/c290e496fda461a11135608d022ada53bc65fdd4