Index: ruby-augeas-0.5.0/ext/augeas/extconf.rb
===================================================================
--- ruby-augeas-0.5.0.orig/ext/augeas/extconf.rb
+++ ruby-augeas-0.5.0/ext/augeas/extconf.rb
@@ -31,4 +31,6 @@ unless pkg_config("libxml-2.0")
     raise "libxml2-devel not installed"
 end
 
+$CFLAGS << ' -Wno-error=incompatible-pointer-types '
+
 create_makefile(extension_name)