Patch by Bill Noon: added 'dylib' as a library type along with
'static' and 'shared'. This fixes extension building for dynamic
Pythons on MacOSX.
diff --git a/Lib/distutils/ccompiler.py b/Lib/distutils/ccompiler.py
index 4a282d4..4efd934 100644
--- a/Lib/distutils/ccompiler.py
+++ b/Lib/distutils/ccompiler.py
@@ -792,8 +792,8 @@
                           output_dir=''):
 
         if output_dir is None: output_dir = ''
-        if lib_type not in ("static","shared"):
-            raise ValueError, "'lib_type' must be \"static\" or \"shared\""
+        if lib_type not in ("static","shared","dylib"):
+            raise ValueError, "'lib_type' must be \"static\", \"shared\" or \"dylib\""
         fmt = getattr (self, lib_type + "_lib_format")
         ext = getattr (self, lib_type + "_lib_extension")