Add -3 option to the interpreter to warn about features that are
deprecated and will be changed/removed in Python 3.0.
This patch is mostly from Anthony. I tweaked some format and added
a little doc.
diff --git a/Objects/object.c b/Objects/object.c
index 9e25467..8de6723 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -29,6 +29,7 @@
#endif /* Py_REF_DEBUG */
int Py_DivisionWarningFlag;
+int Py_Py3kWarningFlag;
/* Object allocation routines used by NEWOBJ and NEWVAROBJ macros.
These are used by the individual routines for object creation.