extconf.rb in uninclude-1.1.0

- old
+ new

@@ -6,6 +6,10 @@
 
 if RUBY_VERSION >= '1.9.3'
   $CFLAGS << ' -DHAVE_RUBY_BACKWARD_CLASSEXT_H'
 end
 
+if RUBY_VERSION >= '2.1.0'
+  $CFLAGS << ' -DRUBY_V2_1_0'
+end
+
 create_makefile('uninclude/uninclude')