Adapt build system for building against qt6

CMakeLists.txt

@@ -13,7 +13,7 @@ set(KJUMPINGCUBE_VERSION "${KJUMPINGCUBE_BASE_VERSION}.${RELEASE_SERVICE_COMPACT
 project(kjumpingcube VERSION ${KJUMPINGCUBE_VERSION})
 
 set (QT_MIN_VERSION "5.15.0")
-set (KF5_MIN_VERSION "5.85.0")
+set (KF5_MIN_VERSION "5.90.0")
 
 find_package(ECM ${KF5_MIN_VERSION} REQUIRED CONFIG)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${ECM_MODULE_PATH})
@@ -28,7 +28,8 @@ include(ECMQtDeclareLoggingCategory)
 include(ECMSetupVersion)
 include(FeatureSummary)
 
-find_package(Qt5 ${QT_MIN_VERSION} REQUIRED NO_MODULE COMPONENTS Widgets Svg)
+find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} REQUIRED NO_MODULE COMPONENTS Widgets Svg)
+find_package(Qt${QT_MAJOR_VERSION}QuickWidgets ${REQUIRED_QT_VERSION} CONFIG)
 find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS
     CoreAddons
     Config

src/CMakeLists.txt

@@ -52,7 +52,7 @@ target_link_libraries(kjumpingcube
     KF5::DBusAddons
     KF5::KIOWidgets
     KF5::XmlGui
-    Qt::Svg
+    Qt${QT_MAJOR_VERSION}::Svg
 )
 
 install(TARGETS kjumpingcube ${KDE_INSTALL_TARGETS_DEFAULT_ARGS})

src/game.cpp

@@ -17,6 +17,7 @@
 #include "kjumpingcube_debug.h"
 #include <QFileDialog>
 #include <QTemporaryFile>
+#include <QRegExp>
 
 #include <KConfigDialog> // IDW test.
 #include <KIO/CopyJob>