forgot a '-'

ncourty · ncourty · commit 15a062d55ad5 · 2018-10-20T01:16:31.000+02:00
diff --git a/setup.py b/setup.py
@@ -25,7 +25,7 @@
     README = f.read()
 
 # add platform dependant optional compilation argument
-opt_arg=["O3"]
+opt_arg=["-O3"]
 import platform
 if platform.system()=='Darwin':
   if platform.release()=='18.0.0':
