Allow to build against qt6

CMakeLists.txt

@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.16)
 set(PROJECT_VERSION "5.24.80")
 
 set(QT_MIN_VERSION "5.15.0")
-set(KF5_MIN_VERSION "5.86")
+set(KF5_MIN_VERSION "5.90")
 set(KDE_COMPILERSETTINGS_LEVEL "5.82")
 
 find_package(ECM ${KF5_MIN_VERSION} REQUIRED NO_MODULE)
@@ -16,7 +16,7 @@ include(KDEClangFormat)
 include(FeatureSummary)
 include(KDEGitCommitHooks)
 
-find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS Core Gui Widgets Quick QuickWidgets)
+find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS Core Gui Widgets Quick QuickWidgets)
 
 find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS
     CoreAddons

src/sddmkcm.cpp

@@ -10,9 +10,9 @@
 
 #include "config.h"
 #include "sddmdata.h"
-#include "sddmsettings.h"
+
 #include "sessionmodel.h"
-#include "themesmodel.h"
+
 #include "usersmodel.h"
 
 #include <QApplication>

src/sddmkcm.h

@@ -6,13 +6,12 @@
 #ifndef SDDMKCM_H
 #define SDDMKCM_H
 
+#include "sddmsettings.h"
+#include "themesmodel.h"
 #include <KQuickAddons/ManagedConfigModule>
-
 class ThemeConfig;
 class AdvancedConfig;
 class SddmData;
-class SddmSettings;
-class ThemesModel;
 
 class SddmKcm : public KQuickAddons::ManagedConfigModule
 {