diff -ru d1x-rebirth_v0.58.1-src.orig/SConstruct d1x-rebirth_v0.58.1-src/SConstruct
--- d1x-rebirth_v0.58.1-src.orig/SConstruct	2013-08-03 08:13:39.000000000 -0400
+++ d1x-rebirth_v0.58.1-src/SConstruct	2015-01-27 02:38:03.847800615 -0500
@@ -218,7 +218,6 @@
 			env.Append(CPPFLAGS = ['-g'])
 		else:
 			env.Append(CPPDEFINES = ['NDEBUG', 'RELEASE'])
-			env.Append(CPPFLAGS = ['-O2'])
 
 		# profiler?
 		if (self.user_settings.profiler == 1):