Fix Qt6 build of the xdgactivationtest

tests/CMakeLists.txt

@@ -1,5 +1,6 @@
-find_package(Qt5 REQUIRED COMPONENTS WaylandClient)
-find_package(Qt6 OPTIONAL_COMPONENTS Widgets)
+if (QT_MAJOR_VERSION EQUAL "5")
+    find_package(Qt5 REQUIRED COMPONENTS WaylandClient)
+endif()
 
 if (XCB_ICCCM_FOUND)
     set(normalhintsbasesizetest_SRCS normalhintsbasesizetest.cpp)
@@ -40,9 +41,9 @@ target_link_libraries(cursorhotspottest Qt::Widgets)
 
 include_directories(${CMAKE_CURRENT_BINARY_DIR})
 
-add_executable(xdgactivationtest-qt5 xdgactivationtest-qt5.cpp)
-target_link_libraries(xdgactivationtest-qt5 Qt::Widgets Qt::WaylandClient Qt::WaylandClientPrivate Wayland::Client)
 if (QT_MAJOR_VERSION EQUAL "5")
+    add_executable(xdgactivationtest-qt5 xdgactivationtest-qt5.cpp)
+    target_link_libraries(xdgactivationtest-qt5 Qt::Widgets Qt::WaylandClient Qt::WaylandClientPrivate Wayland::Client)
     ecm_add_qtwayland_client_protocol(xdgactivationtest-qt5
         PROTOCOL ${WaylandProtocols_DATADIR}/staging/xdg-activation/xdg-activation-v1.xml
         BASENAME xdg-activation-v1