/usr/bin/bind9-config is in bind9 1:9.10.3.dfsg.P4-8.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170  | #!/bin/sh
#
# Copyright (C) 2004, 2007, 2012, 2013, 2015  Internet Systems Consortium, Inc. ("ISC")
# Copyright (C) 2000, 2001, 2003  Internet Software Consortium.
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
# OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
# $Id: isc-config.sh.in,v 1.17 2007/06/19 23:46:59 tbox Exp $
prefix=/usr
exec_prefix=${prefix}
exec_prefix_set=
includedir=${prefix}/include
usage()
{
	cat << EOF
Usage: isc-config [OPTIONS] [LIBRARIES]
Options:
	[--prefix[=DIR]]
	[--exec-prefix[=DIR]]
	[--version]
	[--libs]
	[--cflags]
Libraries:
	isc
	isccc
	isccfg
	dns
	lwres
	bind9
	irs
EOF
	exit $1
}
if test $# -eq 0; then
	usage 1 1>&2
fi
while test $# -gt 0; do
	case "$1" in
	-*=*) optarg=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
	*) optarg= ;;
	esac
	case "$1" in
	--prefix=*)
		prefix=$optarg
		if test "x$exec_prefix_set" = x ; then
			exec_prefix=$prefix
			exec_prefix_set=true
		fi
		;;
	--prefix)
		echo_prefix=true
		;;
	--exec-prefix=*)
		exec_prefix=$optarg
		exec_prefix_set=true
		;;
	--exec-prefix)
		echo_exec_prefix=true
		;;
	--version)
		echo VERSION=9.10.3-P4-Ubuntu
		exit 0
		;;
	--cflags)
		echo_cflags=true
		;;
	--libs)
		echo_libs=true;
		;;
	irs)
		libirs=true;
		libdns=true;
		libisccfg=true;
		libisc=true;
		;;
	isc) 
		libisc=true;
		;;
	isccc)
		libisccc=true;
		libisc=true;
		;;
	isccfg)
		libisccfg=true;
		libisc=true;
		;;
	dns)
		libdns=true;
		libisc=true;
		;;
	lwres)
		liblwres=true;
		;;
	bind9)
		libdns=true;
		libisc=true;
		libisccfg=true;
		libbind9=true;
		;;
	*)
		usage 1 1>&2
	esac
	shift
done
if test x"$echo_prefix" = x"true" ; then
	echo $prefix
fi
if test x"$echo_exec_prefix" = x"true" ; then
	echo $exec_prefix
fi
if test x"$echo_cflags" = x"true"; then
	if test x"${exec_prefix_set}" = x"true"; then
		includes="-I${exec_prefix}/include"
	else
		includes="-I${includedir}"
	fi
	if test x"$libisc" = x"true"; then
		includes="$includes -D_REENTRANT -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64   -D_GNU_SOURCE "
	fi
	echo $includes
fi
if test x"$echo_libs" = x"true"; then
	if test x"${exec_prefix_set}" = x"true"; then
		libs="-L${exec_prefix}/lib"
	else
		libs=
	fi
	if test x"$libirs" = x"true" ; then
		libs="$libs -lirs"
	fi
	if test x"$liblwres" = x"true" ; then
		libs="$libs -llwres"
	fi
	if test x"$libbind9" = x"true" ; then
		libs="$libs -lbind9"
	fi
	if test x"$libdns" = x"true" ; then
		libs="$libs -ldns  -lgssapi_krb5 -lkrb5 -lk5crypto -lcom_err -lcrypto"
	fi
	if test x"$libisccfg" = x"true" ; then
		libs="$libs -lisccfg"
	fi
	if test x"$libisccc" = x"true" ; then
		libs="$libs -lisccc"
	fi
	if test x"$libisc" = x"true" ; then
		libs="$libs -lisc"
		needothers=true
	fi
	if test x"$needothers" = x"true" ; then
		libs="$libs  -ldl -lcap -lpthread -lm -lGeoIP  -L/usr/lib -lxml2"
	fi
	echo $libs
fi
 |