kossebau added a comment.
In https://phabricator.kde.org/D6772#126799, @apol wrote: > What's the background for the change? When KDE_INSTALL_USE_QT_SYS_PATHS is explicitely set to ON but no qmake-qt5 executable found (like @rdieter reported to be possible on fedora packaging), query_qmake will only emit a warning and then return an empty string. Just, e.g. KDEInstallDirs code does not check for that empty string/error, but assumes a proper value to be returned when using it for estimating the Qt system paths, e.g. like this: query_qmake(qt_plugins_dir QT_INSTALL_PLUGINS) _define_absolute(QTPLUGINDIR ${qt_plugins_dir} "Qt plugins" QT_PLUGIN_INSTALL_DIR) And given there is no sane default here, but instead we expect to get the paths from qmake, these kinds of calls to query_qmake should fail hard if there no executable. REPOSITORY R240 Extra CMake Modules REVISION DETAIL https://phabricator.kde.org/D6772 To: kossebau, #frameworks, ltoscano, rdieter, apol Cc: #build_system
