GNOME_COMPILE_WARNINGS(maximum)?
why not a problem for native?
--- /dev/null
+diff -ur atk-2.8.0_/configure.ac atk-2.8.0/configure.ac
+--- atk-2.8.0_/configure.ac 2014-10-03 03:29:39.208601084 +0300
++++ atk-2.8.0/configure.ac 2014-10-03 03:29:50.448108877 +0300
+@@ -215,7 +215,7 @@
+ fi
+ AC_SUBST(REBUILD)
+
+-GNOME_COMPILE_WARNINGS([maximum])
++# GNOME_COMPILE_WARNINGS([maximum])
+
+ AC_CONFIG_FILES([
+ Makefile
inherit autotools gtk-doc pkgconfig
-SRC_URI = "${GNOME_MIRROR}/${BPN}/2.8/${BPN}-${PV}.tar.xz"
+SRC_URI = "${GNOME_MIRROR}/${BPN}/2.8/${BPN}-${PV}.tar.xz \
+ file://no_gnome_warnings_maximum.patch;patch=1 \
+ "
SRC_URI[md5sum] = "c652bd25530825d604dae1c1ebd2da02"
SRC_URI[sha256sum] = "b22519176226f3e07cf6d932b77852e6b6be4780977770704b32d0f4e0686df4"