written by Eric Allman; add Berkeley specific header

[unix-history] / usr / src / usr.bin / mkdep / mkdep.sh

#!/bin/sh -
#
# Copyright (c) 1987 Regents of the University of California.
# All rights reserved.
#
# Redistribution and use in source and binary forms are permitted
# provided that this notice is preserved and that due credit is given
# to the University of California at Berkeley. The name of the University
# may not be used to endorse or promote products derived from this
# software without specific prior written permission. This software
# is provided ``as is'' without express or implied warranty.
#
#       @(#)mkdep.sh    5.10 (Berkeley) %G%
#

PATH=/bin:/usr/bin:/usr/ucb
export PATH

MAKE=Makefile                   # default makefile name is "Makefile"

while :
       do case "$1" in
               # -f allows you to select a makefile name
               -f)
                       MAKE=$2
                       shift; shift ;;

               # the -p flag produces "program: program.c" style dependencies
               # so .o's don't get produced
               -p)
                       SED='s;\.o;;'
                       shift ;;
               *)
                       break ;;
       esac
done

if [ $# = 0 ] ; then
       echo 'usage: mkdep [-p] [-f makefile] [flags] file ...'
       exit 1
fi

if [ ! -w $MAKE ]; then
       echo "mkdep: no writeable file \"$MAKE\""
       exit 1
fi

TMP=/tmp/mkdep$$

trap 'rm -f $TMP ; exit 1' 1 2 3 13 15

cp $MAKE ${MAKE}.bak

sed -e '/DO NOT DELETE THIS LINE/,$d' < $MAKE > $TMP

cat << _EOF_ >> $TMP
# DO NOT DELETE THIS LINE -- mkdep uses it.
# DO NOT PUT ANYTHING AFTER THIS LINE, IT WILL GO AWAY.

_EOF_

cc -M $* |
sed "
       s; \./; ;g
       $SED" |
awk '{
       if ($1 != prev) {
               if (rec != "")
                       print rec;
               rec = $0;
               prev = $1;
       }
       else {
               if (length(rec $2) > 78) {
                       print rec;
                       rec = $0;
               }
               else
                       rec = rec " " $2
       }
}
END {
       print rec
}' >> $TMP

cat << _EOF_ >> $TMP

# IF YOU PUT ANYTHING HERE IT WILL GO AWAY
_EOF_

# copy to preserve permissions
cp $TMP $MAKE
rm -f ${MAKE}.bak $TMP
exit 0