Prepare CMake for Qt6 (#3103)

src/CMakeLists.txt

@@ -486,16 +486,16 @@ add_library(${LIBRARY_PROJECT} OBJECT ${SOURCE_FILES})
 
 target_link_libraries(${LIBRARY_PROJECT}
         PUBLIC
-        Qt5::Core
-        Qt5::Widgets
-        Qt5::Gui
-        Qt5::Network
-        Qt5::Multimedia
-        Qt5::Svg
-        Qt5::Concurrent
+        Qt${MAJOR_QT_VERSION}::Core
+        Qt${MAJOR_QT_VERSION}::Widgets
+        Qt${MAJOR_QT_VERSION}::Gui
+        Qt${MAJOR_QT_VERSION}::Network
+        Qt${MAJOR_QT_VERSION}::Multimedia
+        Qt${MAJOR_QT_VERSION}::Svg
+        Qt${MAJOR_QT_VERSION}::Concurrent
 
         LibCommuni::LibCommuni
-        qt5keychain
+        qt${MAJOR_QT_VERSION}keychain
         Pajlada::Serialize
         Pajlada::Settings
         Pajlada::Signals
@@ -524,8 +524,8 @@ if (BUILD_APP)
         )
 
     if (MSVC)
-        get_target_property(Qt5_Core_Location Qt5::Core LOCATION)
-        get_filename_component(QT_BIN_DIR ${Qt5_Core_Location} DIRECTORY)
+        get_target_property(Qt_Core_Location Qt${MAJOR_QT_VERSION}::Core LOCATION)
+        get_filename_component(QT_BIN_DIR ${Qt_Core_Location} DIRECTORY)
         set(WINDEPLOYQT_COMMAND "${QT_BIN_DIR}/windeployqt.exe" $<TARGET_FILE:${EXECUTABLE_PROJECT}> --release --no-compiler-runtime --no-translations --no-opengl-sw)
 
         install(TARGETS ${EXECUTABLE_PROJECT}
@@ -582,7 +582,7 @@ target_compile_definitions(${LIBRARY_PROJECT} PUBLIC
     CHATTERINO_GIT_RELEASE=\"${GIT_RELEASE}\"
     CHATTERINO_GIT_COMMIT=\"${GIT_COMMIT}\"
     )
-if (USE_SYSTEM_QT5KEYCHAIN)
+if (USE_SYSTEM_QTKEYCHAIN)
     target_compile_definitions(${LIBRARY_PROJECT} PUBLIC
         CMAKE_BUILD
         )