Found the following significant warnings:
  atkClasses.c:1050:25: warning: incompatible pointer types assigning to 'void (*)(AtkObject *, guint, gpointer)' (aka 'void (*)(struct _AtkObject *, unsigned int, void *)') from 'void (AtkObject *, guint, AtkObject *)' (aka 'void (struct _AtkObject *, unsigned int, struct _AtkObject *)') [-Wincompatible-pointer-types]
  atkClasses.c:1058:34: warning: incompatible pointer types assigning to 'void (*)(AtkObject *, gpointer *)' (aka 'void (*)(struct _AtkObject *, void **)') from 'void (AtkObject *, AtkObject *)' (aka 'void (struct _AtkObject *, struct _AtkObject *)') [-Wincompatible-pointer-types]
  atkClasses.c:1397:51: warning: incompatible pointer types passing 'AtkObject *' (aka 'struct _AtkObject *') to parameter of type 'gpointer *' (aka 'void **') [-Wincompatible-pointer-types]
  gioClasses.c:1948:17: warning: incompatible pointer types assigning to 'gssize (*)(GOutputStream *, const void *, gsize, GCancellable *, GError **)' (aka 'long (*)(struct _GOutputStream *, const void *, unsigned long, struct _GCancellable *, struct _GError **)') from 'gssize (GOutputStream *, const guchar *, gsize, GCancellable *, GError **)' (aka 'long (struct _GOutputStream *, const unsigned char *, unsigned long, struct _GCancellable *, struct _GError **)') [-Wincompatible-pointer-types]
  gioClasses.c:1964:20: warning: incompatible pointer types assigning to 'void (*)(GOutputStream *, const void *, gsize, int, GCancellable *, GAsyncReadyCallback, gpointer)' (aka 'void (*)(struct _GOutputStream *, const void *, unsigned long, int, struct _GCancellable *, void (*)(struct _GObject *, struct _GAsyncResult *, void *), void *)') from 'void (GOutputStream *, const guchar *, gsize, int, GCancellable *, GAsyncReadyCallback, gpointer)' (aka 'void (struct _GOutputStream *, const unsigned char *, unsigned long, int, struct _GCancellable *, void (*)(struct _GObject *, struct _GAsyncResult *, void *), void *)') [-Wincompatible-pointer-types]
  gdkFuncs.c:6000:36: warning: incompatible pointer types passing 'GtkWidget **' (aka 'struct _GtkWidget **') to parameter of type 'gpointer *' (aka 'void **') [-Wincompatible-pointer-types]
  gtkClasses.c:8665:28: warning: incompatible pointer types assigning to 'gboolean (*)(GtkNotebook *, gint)' (aka 'int (*)(struct _GtkNotebook *, int)') from 'void (GtkNotebook *, gint)' (aka 'void (struct _GtkNotebook *, int)') [-Wincompatible-pointer-types]
  gtkClasses.c:11110:21: warning: incompatible pointer types assigning to 'gboolean (*)(GtkScrolledWindow *, GtkScrollType, gboolean)' (aka 'int (*)(struct _GtkScrolledWindow *, GtkScrollType, int)') from 'void (GtkScrolledWindow *, GtkScrollType, gboolean)' (aka 'void (struct _GtkScrolledWindow *, GtkScrollType, int)') [-Wincompatible-pointer-types]
See ‘/data/gannet/ripley/R/packages/tests-clang/RGtk2.Rcheck/00install.out’ for details.