#!/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    5.11 (Berkeley) 5/5/88
#

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_

# If your compiler doesn't have -M, add it.  If you can't, the next two
# lines will try and replace the "cc -M".  The real problem is that this
# hack can't deal with anything that requires a search path, and doesn't
# even try for anything using bracket (<>) syntax.
#
# egrep '^#include[     ]*".*"' /dev/null $* |
# sed -e 's/:[^"]*"\([^"]*\)".*/: \1/' -e 's/\.c/.o/' |

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
