#!/bin/sh -
#
# Copyright (c) 1991, 1993
#   The Regents of the University of California.  All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
#    must display the following acknowledgement:
#   This product includes software developed by the University of
#   California, Berkeley and its contributors.
# 4. Neither the name of the University nor the names of its contributors
#    may be used to endorse or promote products derived from this software
#    without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#   @(#)mkdep.sh    8.1 (Berkeley) 6/6/93
#

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

D=.depend           # default dependency file is .depend
append=0
CC='gcc -MM'

while :
    do case "$1" in
        # -a appends to the depend file
        -a)
            append=1
            shift ;;

        # -f allows you to select a makefile name
        -f)
            D=$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 depend_file] [cc_flags] file ...'
    exit 1
fi

TMP=/tmp/mkdep$$

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

$CC $* |
sed "
    s; \./; ;g
    /\.c:$/d
    $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

if [ $? != 0 ]; then
    echo 'mkdep: compile failed.'
    rm -f $TMP
    exit 1
fi

if [ $append = 1 ]; then
    cat $TMP >> $D
    rm -f $TMP
else
    mv $TMP $D
fi
exit 0
