Enabled WITH_LONG_LONG. No reason it was disabled, it has been supported by the Metrowerks compiler for quite some time.
diff --git a/Mac/Include/pyconfig.h b/Mac/Include/pyconfig.h
index eb53725..dc79dcb 100644
--- a/Mac/Include/pyconfig.h
+++ b/Mac/Include/pyconfig.h
@@ -185,7 +185,7 @@
#undef HAVE_LARGEFILE_SUPPORT
/* Define this if you have the type long long */
-#undef HAVE_LONG_LONG
+#define HAVE_LONG_LONG
/* Define if your compiler supports function prototypes */
#define HAVE_PROTOTYPES 1
@@ -341,7 +341,7 @@
#define SIZEOF_LONG 4
/* The number of bytes in a long long. */
-#undef SIZEOF_LONG_LONG
+#define SIZEOF_LONG_LONG 8
/* The number of bytes in a short. */
#define SIZEOF_SHORT 2