#!/ bin / sh -
#$OpenBSD : lorder.sh, v 1.15 2015 / 07 / 03 11 : 43 : 55 jca Exp $
#$NetBSD : lorder.sh.gnm, v 1.3 1995 / 12 / 20 04 : 45 : 11 cgd Exp $
#
#Copyright(c) 1990, 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. 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.
#
#@(#) lorder.sh 8.1(Berkeley) 6 / 6 / 93
#

#one argument can be optimized : put out the filename twice
case $# in
	0)
		echo "usage: lorder file ...";
		exit ;;
	1)
		echo $1 $1;
		exit ;;
esac

#temporary files
R=`mktemp /tmp/_referenceXXXXXXXXXX` || exit 1
S=`mktemp /tmp/_symbolXXXXXXXXXX` || {
	rm -f ${R}
	exit 1
}

#remove temporary files on HUP, INT, QUIT, PIPE, TERM
trap "rm -f $R $S; exit 0" 0
trap "rm -f $R $S; exit 1" 1 2 3 13 15

#make sure files depend on themselves
for file in "$@"; do echo "$file $file" ; done
#if the line has " T ", " D ", " G ", " R ", it's a globally defined
#symbol, put it into the symbol file.
#
#if the line has " U " it's a globally undefined symbol, put it into
#the reference file.
${NM:
- nm
}
- go "$@" |
    sed "
            / [TDGR] / {s / :.*[TDGR] / / w $S d} / U /
            {s / :.*U / / w $R} d "

#sort symbols and references on the first field(the symbol)
#join on that field, and print out the file names(dependencies).
            sort -
        k 2 - o $R $R sort - k 2 - o $S $S join - j 2 - o 1.1,
    2.1 $R $S rm - f $R $S
