Adapt build system for building against qt6

CMakeLists.txt

@@ -9,7 +9,7 @@ set(RELEASE_SERVICE_VERSION "${RELEASE_SERVICE_VERSION_MAJOR}.${RELEASE_SERVICE_
 project(keditbookmarks VERSION ${RELEASE_SERVICE_VERSION})
 
 # ECM setup
-set(KF5_MIN_VERSION "5.85.0")
+set(KF5_MIN_VERSION "5.89.0")
 find_package(ECM ${KF5_MIN_VERSION} CONFIG REQUIRED)
 set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH})
 
@@ -32,7 +32,10 @@ kde_clang_format(${ALL_CLANG_FORMAT_SOURCE_FILES})
 
 set(KEDITBOOKMARKS_VERSION "5.97.0")
 
-find_package(Qt5 ${QT_MIN_VERSION} REQUIRED COMPONENTS Core)
+find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} REQUIRED COMPONENTS Core)
+if (QT_MAJOR_VERSION STREQUAL "6")
+    find_package(Qt6Core5Compat)
+endif()
 find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS CoreAddons I18n KIO Bookmarks Parts WindowSystem IconThemes)
 find_package(KF5DocTools ${KF5_MIN_VERSION})
 set_package_properties(KF5DocTools PROPERTIES DESCRIPTION
@@ -40,14 +43,13 @@ set_package_properties(KF5DocTools PROPERTIES DESCRIPTION
     TYPE OPTIONAL
 )
 if(BUILD_TESTING)
-    find_package(Qt5Test ${QT_REQUIRED_VERSION} CONFIG REQUIRED)
+    find_package(Qt${QT_MAJOR_VERSION}Test ${QT_REQUIRED_VERSION} CONFIG REQUIRED)
 endif()
 
 add_definitions(
     -DQT_DISABLE_DEPRECATED_BEFORE=0x050F02
     -DQT_DEPRECATED_WARNINGS_SINCE=0x060000
-    -DKF_DISABLE_DEPRECATED_BEFORE_AND_AT=0x055500
-    -DKNOTIFICATIONS_DISABLE_DEPRECATED_BEFORE_AND_AT=0x054E00 # KPassivePopup
+    -DKF_DISABLE_DEPRECATED_BEFORE_AND_AT=0x055800
     -DKF_DEPRECATED_WARNINGS_SINCE=0x060000
 )