Unittests and news items for the patch in r77026.
diff --git a/Misc/NEWS b/Misc/NEWS
index 130029c..1ed3421 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -31,6 +31,9 @@
 Library
 -------
 
+- Distutils now correctly identifies the build architecture as "x86_64"
+  when building on OSX 10.6 without "-arch" flags. 
+
 - Issue #7556: Distutils' msvc9compiler now opens the MSVC Manifest 
   file in text mode.