Adapt build system for building against qt6

CMakeLists.txt

@@ -13,7 +13,7 @@ if(NOT UNIX)
 endif(NOT UNIX)
 
 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} CONFIG REQUIRED)
 set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} ${CMAKE_SOURCE_DIR}/cmake)
@@ -36,7 +36,7 @@ ecm_setup_version(${RELEASE_SERVICE_VERSION} VARIABLE_PREFIX KDFPRIVATE
     SOVERSION ${RELEASE_SERVICE_VERSION_MAJOR}
 )
 
-find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED
+find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} CONFIG REQUIRED
     Core
     Gui
     Widgets

desktop/CMakeLists.txt

@@ -2,6 +2,6 @@
 ########### install files ###############
 
 install( PROGRAMS org.kde.kdf.desktop org.kde.kwikdisk.desktop DESTINATION ${KDE_INSTALL_APPDIR})
-install( FILES kdfui.rc  DESTINATION ${KDE_INSTALL_KXMLGUI5DIR}/kdf)
-install( FILES kcmdf.desktop DESTINATION  ${KDE_INSTALL_KSERVICES5DIR} )
+install( FILES kdfui.rc  DESTINATION ${KDE_INSTALL_KXMLGUIDIR}/kdf)
+install( FILES kcmdf.desktop DESTINATION  ${KDE_INSTALL_KSERVICESDIR} )
 install(FILES org.kde.kdf.appdata.xml DESTINATION ${KDE_INSTALL_METAINFODIR})

src/CMakeLists.txt

@@ -37,7 +37,7 @@ ki18n_wrap_ui(kdfprivate_SRCS
 add_library(kdfprivate ${kdfprivate_SRCS})
 generate_export_header(kdfprivate BASE_NAME kdfprivate)
 target_link_libraries(kdfprivate PUBLIC
-    Qt::Core
+    Qt${QT_MAJOR_VERSION}::Core
     KF5::Completion
     KF5::ConfigWidgets
     KF5::I18n
@@ -87,7 +87,7 @@ add_executable(kwikdisk ${kwikdisk_SRCS})
 
 target_link_libraries(kwikdisk
     kdfprivate
-    Qt::Core
+    Qt${QT_MAJOR_VERSION}::Core
     KF5::KIOWidgets
     KF5::Notifications
 )
@@ -107,7 +107,7 @@ add_library(kcm_kdf ${kcm_kdf_PART_SRCS})
 kcoreaddons_desktop_to_json(kcm_kdf "../desktop/kcmdf.desktop" SERVICE_TYPES kcmodule.desktop)
 target_link_libraries(kcm_kdf
     kdfprivate
-    Qt::Core
+    Qt${QT_MAJOR_VERSION}::Core
 )
 
 install(TARGETS kcm_kdf  DESTINATION ${KDE_INSTALL_PLUGINDIR})