Issue #2513: enable 64bit cross compilation on windows.
diff --git a/Lib/distutils/util.py b/Lib/distutils/util.py
index deb9a0a..69d90cf 100644
--- a/Lib/distutils/util.py
+++ b/Lib/distutils/util.py
@@ -30,7 +30,7 @@
        irix64-6.2
 
     Windows will return one of:
-       win-x86_64 (64bit Windows on x86_64 (AMD64))
+       win-amd64 (64bit Windows on AMD64 (aka x86_64, Intel64, EM64T, etc)
        win-ia64 (64bit Windows on Itanium)
        win32 (all others - specifically, sys.platform is returned)
 
@@ -45,7 +45,7 @@
         j = string.find(sys.version, ")", i)
         look = sys.version[i+len(prefix):j].lower()
         if look=='amd64':
-            return 'win-x86_64'
+            return 'win-amd64'
         if look=='itanium':
             return 'win-ia64'
         return sys.platform