Python on OS X 10.3 and above now uses dlopen() (via dynload_shlib.c)
to load extension modules and now provides the dl module. As a result,
sys.setdlopenflags() now works correctly on these systems. (SF patch
#1454844)
diff --git a/setup.py b/setup.py
index 065a115..eea9ee8 100644
--- a/setup.py
+++ b/setup.py
@@ -969,7 +969,7 @@
         if sys.maxint == 0x7fffffff:
             # This requires sizeof(int) == sizeof(long) == sizeof(char*)
             dl_inc = find_file('dlfcn.h', [], inc_dirs)
-            if (dl_inc is not None) and (platform not in ['atheos', 'darwin']):
+            if (dl_inc is not None) and (platform not in ['atheos']):
                 exts.append( Extension('dl', ['dlmodule.c']) )
 
         # Thomas Heller's _ctypes module