Index: generic/predefined.h
===================================================================
diff -u -r6c2e8f94be1ba335ff90d4b6b5132c98a9f5c242 -rf2c0f8e055015e58f3fa7bd338c872a2b7d76113
--- generic/predefined.h	(.../predefined.h)	(revision 6c2e8f94be1ba335ff90d4b6b5132c98a9f5c242)
+++ generic/predefined.h	(.../predefined.h)	(revision f2c0f8e055015e58f3fa7bd338c872a2b7d76113)
@@ -33,6 +33,11 @@
 "unset {proc ::nsf::__exithandler args {;}}\n"
 "default {error \"syntax: ::nsf::exithandler $::nsf::parametersyntax(::nsf::exithandler)\"}}}\n"
 "::nsf::exithandler unset\n"
+"if {[info command ::ns_log] ne \"\"} {\n"
+"proc ::nsf::log {level msg} {\n"
+"ns_log $level \"nsf: $msg\"}} else {\n"
+"proc ::nsf::log {level msg} {\n"
+"puts stderr \"$level: $msg\"}}\n"
 "proc tmpdir {} {\n"
 "foreach e [list TMPDIR TEMP TMP] {\n"
 "if {[info exists ::env($e)] \\\n"