--- libcxml-0.15.1/wscript
+++ libcxml-0.15.1/wscript
@@ -12,7 +12,7 @@
 
 def configure(conf):
     conf.load('compiler_cxx')
-    conf.env.append_value('CXXFLAGS', ['-Wall', '-Wextra', '-O2'])
+    conf.env.append_value('CXXFLAGS', ['-Wall', '-Wextra'])
 
     conf.env.TARGET_WINDOWS = conf.options.target_windows
     conf.env.STATIC = conf.options.static