gdkdisplay

 warning: implicit declaration of function 'gtk_window_get_display' [-Wimplicit-function-declaration]
 warning: nested extern declaration of 'gtk_window_get_display' [-Wnested-externs]
 warning: passing argument 1 of 'gdk_display_get_device_manager' makes pointer from integer without a cast [enabled by default]
In file included from /opt/gnome/include/gtk-3.0/gdk/gdkscreen.h:32:0,
                 from /opt/gnome/include/gtk-3.0/gdk/gdkapplaunchcontext.h:31,
                 from /opt/gnome/include/gtk-3.0/gdk/gdk.h:32,
                 from /opt/gnome/include/gtk-3.0/gtk/gtk.h:30,
                 from scrollarea.h:19,
                 from scrollarea.c:19:
/opt/gnome/include/gtk-3.0/gdk/gdkdisplay.h:135:20: note: expected 'struct GdkDisplay *' but argument is of type 'int'