Show deprecated methods warnings

CMakeLists.txt

@@ -9,7 +9,7 @@ set (RELEASE_SERVICE_COMPACT_VERSION "${RELEASE_SERVICE_VERSION_MAJOR}${RELEASE_
 project(ksudoku VERSION "1.4.${RELEASE_SERVICE_COMPACT_VERSION}")
 
 set (QT_MIN_VERSION "5.15.0")
-set (KF5_MIN_VERSION "5.85.0")
+set (KF5_MIN_VERSION "5.89.0")
 
 find_package(ECM ${KF5_MIN_VERSION} REQUIRED CONFIG)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${ECM_MODULE_PATH} )
@@ -46,6 +46,10 @@ include(KDEInstallDirs)
 include(KDECompilerSettings NO_POLICY_SCOPE)
 include(KDECMakeSettings)
 
+add_definitions(
+    -DQT_DEPRECATED_WARNINGS_SINCE=0x060000
+    -DKF_DEPRECATED_WARNINGS_SINCE=0x060000
+)
 if (Qt5OpenGL_FOUND AND OPENGL_FOUND AND OPENGL_GLU_FOUND)
     set(OPENGL_SUPPORT true)
 endif()