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#!/bin/sh
old=$1
new=$2
nm=$3-
newarc=$nm$new.tar.gz
oldarc=$nm$old.tar.gz
if [ ! -f $newarc ]
then
	echo cant find $newarc
	exit
fi
if [ ! -f $oldarc ]
then
	echo cant find oldarc
	exit
fi
if [ ! -x  $nm$new ]
then
   echo untarring ..
  tar zfxv $nm$new.tar.gz
fi
if [ ! -x  $nm$old ]
then
   echo untarring
   tar zfxv $nm$old.tar.gz
fi

(cd $nm$old; make clean)
(cd $nm$new; make clean)
(cd $nm$new; diff -P -c  ../$nm$old . > ../patch-$new)
rm -rf $nm$old