$ cat /tmp/gtk+-3.22.19.atk-bridge.patch
$NetBSD: patch-configure.ac,v 1.2 2014/09/08 12:06:48 wiz Exp $

Make gtk3-atk-bridge an option to avoid unwanted dbus dependency.

--- 1/configure.ac
+++ 2/configure.ac
@@ -1370,8 +1370,13 @@ AC_SUBST(GDK_DEP_CFLAGS)
 # Check for Accessibility Toolkit flags
 ########################################
 
-if test x$enable_x11_backend = xyes; then
+AC_ARG_WITH(atk-bridge,
+           AS_HELP_STRING([--without-atk-bridge], [Do not use atk-bridge-2.0]),
+           :, with_atk_bridge=yes)
+
+if test x$enable_x11_backend = xyes -a x$with_atk_bridge = xyes; then
    ATK_PACKAGES="atk atk-bridge-2.0"
+   AC_DEFINE([HAVE_ATK_BRIDGE], [1], [Define if we're using atk-bridge-2.0])
 else
    ATK_PACKAGES="atk"
 fi
$NetBSD: patch-config.h.in,v 1.2 2014/09/08 12:06:48 wiz Exp $

Make gtk3-atk-bridge an option to avoid unwanted dbus dependency.

--- 1/config.h.in
+++ 1/config.h.in
@@ -10,6 +10,9 @@
 /* Disable deprecation warnings from glib */
 #undef GLIB_DISABLE_DEPRECATION_WARNINGS
 
+/* Define if we're using atk-bridge-2.0 */
+#undef HAVE_ATK_BRIDGE
+
 /* Define to 1 if you have the `bind_textdomain_codeset' function. */
 #undef HAVE_BIND_TEXTDOMAIN_CODESET
 
Make gtk3-atk-bridge an option to avoid unwanted dbus dependency.
--- 1/gtk/a11y/gtkaccessibility.c
+++ 1/gtk/a11y/gtkaccessibility.c
@@ -38,8 +38,10 @@
 #include <gtk/gtkaccessible.h>
 
 #ifdef GDK_WINDOWING_X11
+#ifdef HAVE_ATK_BRIDGE
 #include <atk-bridge.h>
 #endif
+#endif
 
 static gboolean gail_focus_watcher      (GSignalInvocationHint *ihint,
                                          guint                  n_param_values,
@@ -989,8 +991,10 @@ _gtk_accessibility_init (void)
   do_window_event_initialization ();
 
 #ifdef GDK_WINDOWING_X11
+#ifdef HAVE_ATK_BRIDGE
   atk_bridge_adaptor_init (NULL, NULL);
 #endif
+#endif
 
   atk_misc_instance = g_object_new (GTK_TYPE_MISC_IMPL, NULL);
 }

$ cat /tmp/gtk+-3.22.19.ebuild.patch
--- /usr/portage/x11-libs/gtk+/gtk+-3.22.19.ebuild	2018-05-21 20:39:19.000000000 -0500
+++ /usr/local/portage/x11-libs/gtk+/gtk+-3.22.19.ebuild	2018-07-19 17:49:00.890779434 -0500
@@ -11,7 +11,7 @@
 
 LICENSE="LGPL-2+"
 SLOT="3"
-IUSE="aqua broadway cloudprint colord cups examples +introspection test vim-syntax wayland +X xinerama"
+IUSE="aqua atk-bridge broadway cloudprint colord cups examples +introspection test vim-syntax wayland +X xinerama"
 REQUIRED_USE="
 	|| ( aqua wayland X )
 	xinerama? ( X )
@@ -48,7 +48,7 @@
 		>=x11-libs/libxkbcommon-0.2[${MULTILIB_USEDEP}]
 	)
 	X? (
-		>=app-accessibility/at-spi2-atk-2.5.3[${MULTILIB_USEDEP}]
+		atk-bridge? ( >=app-accessibility/at-spi2-atk-2.5.3[${MULTILIB_USEDEP}] )
 		x11-libs/libX11[${MULTILIB_USEDEP}]
 		>=x11-libs/libXi-1.3[${MULTILIB_USEDEP}]
 		x11-libs/libXext[${MULTILIB_USEDEP}]
@@ -120,6 +120,9 @@
 	# gtk-update-icon-cache is installed by dev-util/gtk-update-icon-cache
 	eapply "${FILESDIR}"/${PN}-3.22.2-update-icon-cache.patch
 
+    # get rid of gtk3-atk-bridge crap
+    eapply "${FILESDIR}"/${PN}-3.22.19.atk-bridge.patch
+
 	eautoreconf
 	gnome2_src_prepare
 }
@@ -143,6 +146,7 @@
 		$(use_enable X xkb) \
 		$(use_enable X xrandr) \
 		$(use_enable xinerama) \
+		$(use_with atk-bridge) \
 		--disable-papi \
 		--disable-mir-backend \
 		--enable-man \