Index: Lib/distutils/sysconfig.py
===================================================================
--- Lib/distutils/sysconfig.py	(revision 88318)
+++ Lib/distutils/sysconfig.py	(working copy)
@@ -166,7 +166,7 @@
         if 'LDFLAGS' in os.environ:
             ldshared = ldshared + ' ' + os.environ['LDFLAGS']
         if 'CFLAGS' in os.environ:
-            cflags = opt + ' ' + os.environ['CFLAGS']
+            cflags = cflags + ' ' + os.environ['CFLAGS']
             ldshared = ldshared + ' ' + os.environ['CFLAGS']
         if 'CPPFLAGS' in os.environ:
             cpp = cpp + ' ' + os.environ['CPPFLAGS']