Prepare using Qt6::GuiPrivate for QX11Info

CMakeLists.txt

@@ -72,8 +72,11 @@ set_package_properties(X11 PROPERTIES DESCRIPTION "X11 libraries"
                     )
 if(X11_FOUND)
     if (QT_MAJOR_VERSION STREQUAL "5")
-	    find_package(Qt5X11Extras REQUIRED)
+        find_package(Qt5X11Extras REQUIRED)
+    elseif (QT_MAJOR_VERSION STREQUAL "6")
+        find_package(Qt${QT_MAJOR_VERSION} ${REQUIRED_QT_VERSION} CONFIG REQUIRED Gui) # qtx11extras_p.h
     endif()
+    set(HAVE_X11 1)
     find_library(X11_XRes_LIB XRes ${X11_LIB_SEARCH_PATH})
     find_path(X11_XRes_INCLUDE_PATH X11/extensions/XRes.h ${X11_INC_SEARCH_PATH})
 

processui/CMakeLists.txt

@@ -55,10 +55,11 @@ target_include_directories(processui
         "$<BUILD_INTERFACE:${libksysguard_SOURCE_DIR}>"
         "$<INSTALL_INTERFACE:${KDE_INSTALL_INCLUDEDIR}/ksysguard>"
 )
-
 if(X11_FOUND)
     if (QT_MAJOR_VERSION STREQUAL "5")
        target_link_libraries(processui PRIVATE Qt::X11Extras KF5::WindowSystem)
+    else()
+       target_link_libraries(processui PRIVATE Qt6::GuiPrivate KF5::WindowSystem)
     endif()
 endif()
 

processui/ProcessModel_p.h

@@ -24,7 +24,11 @@
 #include <kuser.h>
 
 #if HAVE_X11
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+#include <private/qtx11extras_p.h>
+#else
 #include <QX11Info>
+#endif
 #include <X11/Xatom.h>
 #include <X11/Xlib.h>
 #include <fixx11h.h>