Source
--- src/Makefile.am.orig 2009-10-08 11:26:39.000000000 -0500
+++ src/Makefile.am 2012-11-04 05:39:06.000000000 -0600
-INCLUDES = $(GTK_CFLAGS) -xobjective-c -Wall -Werror
+INCLUDES = $(GTK_CFLAGS) -xobjective-c -Wall
enginedir = $(libdir)/gtk-2.0/$(GTK_VERSION)/engines
engine_LTLIBRARIES = libquartz.la