Index: generic/nsf.h
===================================================================
diff -u -r3dc0790960d69f641ccc7d52ead8bcf6c4db1830 -r2fa3f1c596fedf924397e424b532d7f223c8b621
--- generic/nsf.h	(.../nsf.h)	(revision 3dc0790960d69f641ccc7d52ead8bcf6c4db1830)
+++ generic/nsf.h	(.../nsf.h)	(revision 2fa3f1c596fedf924397e424b532d7f223c8b621)
@@ -84,6 +84,7 @@
 */
 
 //#define TCL_STACK_ALLOC_TRACE 1
+//#define NRE_CALLBACK_TRACE 1
 
 /* turn  tracing output on/off
 #define NSFOBJ_TRACE 1