Adapt build system for building against qt6 (need kscreen not ported yet)

CMakeLists.txt

@@ -23,7 +23,10 @@ include(KDECMakeSettings)
 include(KDECompilerSettings NO_POLICY_SCOPE)
 include(KDEClangFormat)
 
-find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS Widgets DBus X11Extras)
+find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS Widgets DBus)
+if (QT_MAJOR_VERSION EQUAL "5")
+    find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED X11Extras)
+endif()
 find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS Activities Auth IdleTime Config DBusAddons Solid I18n GlobalAccel KIO NotifyConfig Wayland DocTools Crash Notifications Kirigami2)
 find_package(KF5Screen CONFIG REQUIRED)
 find_package(LibKWorkspace CONFIG REQUIRED)

daemon/CMakeLists.txt

@@ -67,14 +67,14 @@ if(HAVE_WIRELESS_SUPPORT)
     qt_add_dbus_adaptor(powerdevilcore_SRCS actions/bundled/org.kde.Solid.PowerManagement.Actions.WirelessPowerSaving.xml
                          actions/bundled/wirelesspowersaving.h PowerDevil::BundledActions::WirelessPowerSaving)
 endif()
-qt5_add_dbus_adaptor(powerdevilcore_SRCS actions/bundled/org.kde.Solid.PowerManagement.Actions.PowerProfile.xml
+qt_add_dbus_adaptor(powerdevilcore_SRCS actions/bundled/org.kde.Solid.PowerManagement.Actions.PowerProfile.xml
                          actions/bundled/powerprofile.h PowerDevil::BundledActions::PowerProfile)
 
 qt_add_dbus_interface(powerdevilcore_SRCS org.freedesktop.ScreenSaver.xml screenlocker_interface)
 
-qt5_add_dbus_interface(powerdevilcore_SRCS actions/bundled/org.freedesktop.DBus.Properties.xml properties_interface)
+qt_add_dbus_interface(powerdevilcore_SRCS actions/bundled/org.freedesktop.DBus.Properties.xml properties_interface)
 
-qt5_add_dbus_interface(powerdevilcore_SRCS actions/bundled/net.hadess.PowerProfiles.xml power_profiles_interface)
+qt_add_dbus_interface(powerdevilcore_SRCS actions/bundled/net.hadess.PowerProfiles.xml power_profiles_interface)
 
 add_library(powerdevilcore SHARED ${powerdevilcore_SRCS} ${powerdevil_bundled_actions_SRCS})
 set_target_properties(powerdevilcore PROPERTIES VERSION ${PROJECT_VERSION} SOVERSION 2)