[patch] Worked for me. Based upon the systemd ebuild.

udev-218.ebuild.patch (text/plain), 348 bytes, created by theprogrammernerd on 2015-01-29 03:55:04 UTC

--- udev-218.ebuild
+++ udev-218.ebuild
@@ -205,6 +205,12 @@
 		$(multilib_is_native_abi && echo "--with-rootlibdir=/$(get_libdir)")
 	)
 
+	if ! multilib_is_native_abi; then
+		econf_args+=(
+			MOUNT_{CFLAGS,LIBS}=' '
+		)
+	fi
+
 	# Use pregenerated copies when possible wrt #480924
 	[[ ${PV} = 9999* ]] || econf_args+=( --disable-manpages )