Found the following significant warnings:
  atkClasses.c:1054:25: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
  atkClasses.c:1062:34: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
  atkClasses.c:1401:51: warning: passing argument 2 of ‘object_class->active_descendant_changed’ from incompatible pointer type [-Wincompatible-pointer-types]
  atkFuncs.c:729:3: warning: ‘atk_hyperlink_is_selected_link’ is deprecated [-Wdeprecated-declarations]
  atkFuncs.c:1183:3: warning: ‘atk_object_get_layer’ is deprecated: Use 'atk_component_get_layer' instead [-Wdeprecated-declarations]
  atkFuncs.c:1199:3: warning: ‘atk_object_get_mdi_zorder’ is deprecated: Use 'atk_component_get_mdi_zorder' instead [-Wdeprecated-declarations]
  atkFuncs.c:3481:3: warning: ‘atk_document_get_locale’ is deprecated [-Wdeprecated-declarations]
  gdkFuncs.c:6000:36: warning: passing argument 2 of ‘gdk_window_get_user_data’ from incompatible pointer type [-Wincompatible-pointer-types]
  gioClasses.c:1974:17: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
  gioClasses.c:1990:20: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
  gioFuncs.c:2369:3: warning: ‘g_drive_eject’ is deprecated: Use 'g_drive_eject_with_operation' instead [-Wdeprecated-declarations]
  gioFuncs.c:2390:3: warning: ‘g_drive_eject_finish’ is deprecated: Use 'g_drive_eject_with_operation_finish' instead [-Wdeprecated-declarations]
  gioFuncs.c:4654:3: warning: ‘g_file_unmount_mountable’ is deprecated: Use 'g_file_unmount_mountable_with_operation' instead [-Wdeprecated-declarations]
  gioFuncs.c:4675:3: warning: ‘g_file_unmount_mountable_finish’ is deprecated: Use 'g_file_unmount_mountable_with_operation_finish' instead [-Wdeprecated-declarations]
  gioFuncs.c:4702:3: warning: ‘g_file_eject_mountable’ is deprecated: Use 'g_file_eject_mountable_with_operation' instead [-Wdeprecated-declarations]
  gioFuncs.c:4723:3: warning: ‘g_file_eject_mountable_finish’ is deprecated: Use 'g_file_eject_mountable_with_operation_finish' instead [-Wdeprecated-declarations]
  gioFuncs.c:7595:3: warning: ‘g_io_scheduler_cancel_all_jobs’ is deprecated [-Wdeprecated-declarations]
  gioFuncs.c:7617:3: warning: ‘g_io_scheduler_job_send_to_mainloop’ is deprecated: Use 'g_main_context_invoke' instead [-Wdeprecated-declarations]
  gioFuncs.c:7639:3: warning: ‘g_io_scheduler_job_send_to_mainloop_async’ is deprecated: Use 'g_main_context_invoke' instead [-Wdeprecated-declarations]
  gioFuncs.c:8078:3: warning: ‘g_mount_unmount’ is deprecated: Use 'g_mount_unmount_with_operation' instead [-Wdeprecated-declarations]
  gioFuncs.c:8099:3: warning: ‘g_mount_unmount_finish’ is deprecated: Use 'g_mount_unmount_with_operation_finish' instead [-Wdeprecated-declarations]
  gioFuncs.c:8126:3: warning: ‘g_mount_eject’ is deprecated: Use 'g_mount_eject_with_operation' instead [-Wdeprecated-declarations]
  gioFuncs.c:8147:3: warning: ‘g_mount_eject_finish’ is deprecated: Use 'g_mount_eject_with_operation_finish' instead [-Wdeprecated-declarations]
  gioFuncs.c:9947:3: warning: ‘g_volume_eject’ is deprecated: Use 'g_volume_eject_with_operation' instead [-Wdeprecated-declarations]
  gioFuncs.c:9968:3: warning: ‘g_volume_eject_finish’ is deprecated: Use 'g_volume_eject_with_operation_finish' instead [-Wdeprecated-declarations]
  gioFuncs.c:10135:3: warning: ‘g_volume_monitor_adopt_orphan_mount’ is deprecated [-Wdeprecated-declarations]
  gtkClasses.c:8831:28: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
  gtkClasses.c:11314:21: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]
  pangoFuncs.c:890:3: warning: ‘pango_cairo_font_map_create_context’ is deprecated: Use 'pango_font_map_create_context' instead [-Wdeprecated-declarations]
  pangoFuncs.c:1159:3: warning: ‘pango_get_mirror_char’ is deprecated: Use 'g_unichar_get_mirror_char' instead [-Wdeprecated-declarations]
See ‘/home/ripley/R/packages/tests-devel/RGtk2.Rcheck/00install.out’ for details.