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--- src/Pure/mk.orig	Sun Jun 12 07:19:36 2005
+++ src/Pure/mk	Sun Sep  2 19:22:39 2007
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 #
 # $Id: mk,v 1.27 2005/06/11 21:19:36 wenzelm Exp $
 # Author: Markus Wenzel, TU Muenchen
@@ -10,7 +10,7 @@
 
 ## diagnostics
 
-function usage()
+usage()
 {
   echo
   echo "Usage: $PRG [OPTIONS]"
@@ -23,7 +23,7 @@
   exit 1
 }
 
-function fail()
+fail()
 {
   echo "$1" >&2
   exit 2
@@ -81,7 +81,7 @@
 
 # run isabelle
 
-SECONDS=0
+SECONDS=$(( `date +'%j * 86400 + %H * 3600 + %M * 60 + %S'` ))
 
 if [ -z "$RAW" ]; then
   ITEM="Pure"