#!/bin/sh

#

# $Id$

#

# Find the native ELF format for a host platform by compiling a

# test object and examining the resulting object.

#

# This script is used if there is no easy way to determine this

# information statically at compile time.

program=`basename $0`

tmp_c=`mktemp -u nefXXXXXX`.c

tmp_o=`echo ${tmp_c} | sed -e 's/.c$/.o/'`

trap "rm -f ${tmp_c} ${tmp_o}"	0 1 2 3 15

touch ${tmp_c}

echo "/* Generated by ${program} on `date` */"

cc -c ${tmp_c} -o ${tmp_o}

readelf -h ${tmp_o} | awk '

$1 ~ "Class:" {

        sub("ELF","",$2); elfclass = $2;

    }

$1 ~ "Data:"  {

        if (match($0, "little")) {

            elfdata = "LSB";

 	} else {

            elfdata = "MSB";

	}

    }

$1 ~ "Machine:" {

        if (match($0, "Intel.*386")) {

            elfarch = "EM_386";

        } else if (match($0, ".*X86-64")) {

            elfarch = "EM_X86_64";

        } else {

            elfarch = "unknown";

        }

    }

END {

    printf("#define	ELFTC_CLASS	ELFCLASS%s\n", elfclass);

    printf("#define	ELFTC_ARCH	%s\n", elfarch);

    printf("#define	ELFTC_BYTEORDER	ELFDATA2%s\n", elfdata);

}'