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configure.sh：源码内容
							#!/bin/sh
# Copyright (c) 1998, 1999 Sendmail, Inc. and its suppliers.
#	All rights reserved.
#
# By using this file, you agree to the terms and conditions set
# forth in the LICENSE file which can be found at the top level of
# the sendmail distribution.
#
#
#	$Id: configure.sh,v 8.37 1999/08/09 18:57:26 gshapiro Exp $
#
#  Special script to autoconfigure for M4 generation of Makefile
#
os=""
resolver=""
sflag=""
bin_dir=`dirname $0`
find_prog=$bin_dir/find_in_path.sh
while [ ! -z "$1" ]
do
	case $1
	in
	  -s)	# skip auto-configure
		sflag=1
		shift
		;;
	  *)	# OS definition
		os=$1
		shift
		;;
	esac
done
usewhoami=0
usehostname=0
for p in `echo $PATH | sed 's/:/ /g'`
do
	if [ "x$p" = "x" ]
	then
		p="."
	fi
	if [ -f $p/whoami ]
	then
		usewhoami=1
		if [ $usehostname -ne 0 ]
		then
			break;
		fi
	fi
	if [ -f $p/hostname ]
	then
		usehostname=1
		if [ $usewhoami -ne 0 ]
		then
			break;
		fi
	fi
done
if [ $usewhoami -ne 0 ]
then
	user=`whoami`
else
	user=$LOGNAME
fi
if [ $usehostname -ne 0 ]
then
	host=`hostname`
else
	host=`uname -n`
fi
echo "PUSHDIVERT(0)"
echo "####################################################################"
echo "##### This file is automatically generated -- edit at your own risk"
echo '#####' Built by $user@$host
echo '#####' on `date` using template OS/$os
if [ ! -z "$SITECONFIG" ]
then
	echo '#####' including $SITECONFIG
fi
echo '#####' in `pwd` | sed 's//tmp_mnt//'
echo "####################################################################"
echo ""
echo "POPDIVERT"
echo "define(`__HOST__', `$host')dnl"
echo "ifdef(`confMAPDEF',, `define(`confMAPDEF', `')')dnl"
echo "ifdef(`confLIBS',, `define(`confLIBS', `')')dnl"
LIBDIRS="$LIBDIRS $LIBPATH"
libs=""
mapdef=""
for l in $LIBSRCH
do
	for p in `echo $LIBDIRS | sed -e 's/:/ /g' -e 's/^-L//g' -e 's/ -L/ /g'`
	do
		if [ "x$p" = "x" ]
		then
			p = "."
		fi
		if [ -f $p/lib$l.a -o -f $p/lib$l.so ]
		then
			case $l
			in
			  db)
				mapdef="$mapdef -DNEWDB"
				;;
			  bind|resolv)
				if [ -n "$resolver" ]
				then
					continue
				else
					resolver=$l
				fi
				;;
			  44bsd)
				if [ "x$resolver" != "xresolv" ]
				then
					continue
				fi
				;;
			esac
			libs="$libs -l$l"
			break
		fi
	done
done
for p in `echo $PATH | sed 's/:/ /g'`
do
	pbase=`echo $p | sed -e 's,/bin,,'`
	if [ "x$p" = "x" ]
	then
		p="."
	fi
	if [ -f $p/mkdep ]
	then
		echo "ifdef(`confDEPEND_TYPE',, `define(`confDEPEND_TYPE', `BSD')')dnl"
	fi
done
if [ -z "$sflag" ]
then
	echo "define(`confMAPDEF', `$mapdef' confMAPDEF)dnl"
	echo "define(`confLIBS', `$libs' confLIBS)dnl"
fi
if [ ! -z "`sh $find_prog ranlib`" ]
then
	echo "define(`confRANLIB', `ranlib')dnl"
fi
roff_progs="groff nroff"
for roff_prog in $roff_progs
do
	if [ ! -z "`sh $find_prog $roff_prog`" ]
	then
		found_roff=$roff_prog
		break;
	fi
done
case $found_roff
in
	groff)
		echo "ifdef(`confNROFF',,define(`confNROFF', `$found_roff -Tascii'))dnl"
		;;
	nroff)
		echo "ifdef(`confNROFF',,define(`confNROFF', `$found_roff'))dnl"
		;;
	*)
		echo "ifdef(`confNROFF',,define(`confNO_MAN_BUILD'))dnl"
		;;
esac

						