HardenedBSD/contrib/libpcap/configure.in

dnl @(#) $Header: /tcpdump/master/libpcap/configure.in,v 1.120.2.6 2005/06/20 21:37:43 guy Exp $ (LBL)
dnl
dnl Copyright (c) 1994, 1995, 1996, 1997
dnl	The Regents of the University of California.  All rights reserved.
dnl
dnl Process this file with autoconf to produce a configure script.
dnl

AC_REVISION($Revision: 1.120.2.6 $)
AC_PREREQ(2.50)
AC_INIT(pcap.c)

AC_CANONICAL_SYSTEM

AC_LBL_C_INIT(V_CCOPT, V_INCLS, V_LIBS)
AC_LBL_C_INLINE
AC_C___ATTRIBUTE__

AC_LBL_CHECK_TYPE(u_int8_t, u_char)
AC_LBL_CHECK_TYPE(u_int16_t, u_short)
AC_LBL_CHECK_TYPE(u_int32_t, u_int)

dnl
dnl libpcap doesn't itself use <sys/ioccom.h>; however, the test program
dnl in "AC_LBL_FIXINCLUDES" in "aclocal.m4" uses it, so we have to
dnl test for it and set "HAVE_SYS_IOCCOM_H" if we have it, otherwise
dnl "AC_LBL_FIXINCLUDES" won't work on some platforms such as Solaris.
dnl
AC_CHECK_HEADERS(sys/ioccom.h sys/sockio.h limits.h)
AC_CHECK_HEADERS(netinet/if_ether.h, , , [#include <sys/types.h>
#include <sys/socket.h>])
if test "$ac_cv_header_netinet_if_ether_h" != yes; then
	#
	# The simple test didn't work.
	# Do we need to include <net/if.h> first?
	# Unset ac_cv_header_netinet_if_ether_h so we don't
	# treat the previous failure as a cached value and
	# suppress the next test.
	#
	AC_MSG_NOTICE([Rechecking with some additional includes])
	unset ac_cv_header_netinet_if_ether_h
	AC_CHECK_HEADERS(netinet/if_ether.h, , , [#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
struct mbuf;
struct rtentry;
#include <net/if.h>])
fi

AC_LBL_FIXINCLUDES

AC_CHECK_FUNCS(strerror strlcpy)

needsnprintf=no
AC_CHECK_FUNCS(vsnprintf snprintf,,
	[needsnprintf=yes])
if test $needsnprintf = yes; then
	AC_LIBOBJ(snprintf)
fi

#
# Do this before checking for ether_hostton(), as it's a
# "gethostbyname() -ish function".
#
AC_LBL_LIBRARY_NET

#
# You are in a twisty little maze of UN*Xes, all different.
# Some might not have ether_hostton().
# Some might have it, but not declare it in any header file.
# Some might have it, but declare it in <netinet/if_ether.h>.
# Some might have it, but declare it in <netinet/ether.h>
# (And some might have it but document it as something declared in
# <netinet/ethernet.h>, although <netinet/if_ether.h> appears to work.)
#
# Before you is a C compiler.
#
AC_CHECK_FUNCS(ether_hostton)
if test "$ac_cv_func_ether_hostton" = yes; then
	#
	# OK, we have ether_hostton().  Do we have <netinet/if_ether.h>?
	#
	if test "$ac_cv_header_netinet_if_ether_h" = yes; then
		#
		# Yes.  Does it declare ether_hostton()?
		#
		AC_CHECK_DECL(ether_hostton,
		    [
			AC_DEFINE(NETINET_IF_ETHER_H_DECLARES_ETHER_HOSTTON,,
			    [Define to 1 if netinet/if_ether.h declares `ether_hostton'])
		    ],,
		    [
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
struct mbuf;
struct rtentry;
#include <net/if.h>
#include <netinet/if_ether.h>
		    ])
	fi
	#
	# Did that succeed?
	#
	if test "$ac_cv_have_decl_ether_hostton" != yes; then
		#
		# No, how about <netinet/ether.h>, as on Linux?
		#
		AC_CHECK_HEADERS(netinet/ether.h)
		if test "$ac_cv_header_netinet_ether_h" = yes; then
			#
			# We have it - does it declare ether_hostton()?
			# Unset ac_cv_have_decl_ether_hostton so we don't
			# treat the previous failure as a cached value and
			# suppress the next test.
			#
			unset ac_cv_have_decl_ether_hostton
			AC_CHECK_DECL(ether_hostton,
			    [
				AC_DEFINE(NETINET_ETHER_H_DECLARES_ETHER_HOSTTON,,
				    [Define to 1 if netinet/ether.h declares `ether_hostton'])
			    ],,
			    [
#include <netinet/ether.h>
			    ])
		fi
	fi
	#
	# Is ether_hostton() declared?
	#
	if test "$ac_cv_have_decl_ether_hostton" != yes; then
		#
		# No, we'll have to declare it ourselves.
		# Do we have "struct ether_addr"?
		#
		AC_CHECK_TYPES(struct ether_addr,,,
		    [
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
struct mbuf;
struct rtentry;
#include <net/if.h>
#include <netinet/if_ether.h>
		    ])
		AC_DEFINE(HAVE_DECL_ETHER_HOSTTON, 0,
		    [Define to 1 if you have the declaration of `ether_hostton', and to 0 if you
don't.])
	else
		AC_DEFINE(HAVE_DECL_ETHER_HOSTTON, 1,
		    [Define to 1 if you have the declaration of `ether_hostton', and to 0 if you
don't.])
	fi
fi

dnl to pacify those who hate protochain insn
AC_MSG_CHECKING(if --disable-protochain option is specified)
AC_ARG_ENABLE(protochain, [  --disable-protochain    disable \"protochain\" insn])
case "x$enable_protochain" in
xyes)	enable_protochain=enabled	;;
xno)	enable_protochain=disabled	;;
x)	enable_protochain=enabled	;;
esac

if test "$enable_protochain" = "disabled"; then
	AC_DEFINE(NO_PROTOCHAIN,1,[do not use protochain])
fi
AC_MSG_RESULT(${enable_protochain})

dnl
dnl Not all versions of test support -c (character special) but it's a
dnl better way of testing since the device might be protected. So we
dnl check in our normal order using -r and then check the for the /dev
dnl guys again using -c.
dnl
dnl XXX This could be done for cross-compiling, but for now it's not.
dnl
if test -z "$with_pcap" && test "$cross_compiling" = yes; then
	AC_MSG_ERROR(pcap type not determined when cross-compiling; use --with-pcap=...)
fi
AC_ARG_WITH(pcap, [  --with-pcap=TYPE        use packet capture TYPE])
AC_MSG_CHECKING(packet capture type)
if test ! -z "$with_pcap" ; then
	V_PCAP="$withval"
elif test -r /dev/bpf0 ; then
	V_PCAP=bpf
elif test -r /usr/include/net/pfilt.h ; then
	V_PCAP=pf
elif test -r /dev/enet ; then
	V_PCAP=enet
elif test -r /dev/nit ; then
	V_PCAP=snit
elif test -r /usr/include/sys/net/nit.h ; then
	V_PCAP=nit
elif test -r /usr/include/linux/socket.h ; then
	V_PCAP=linux
elif test -r /usr/include/net/raw.h ; then
	V_PCAP=snoop
elif test -r /usr/include/odmi.h ; then
	#
	# On AIX, the BPF devices might not yet be present - they're
	# created the first time libpcap runs after booting.
	# We check for odmi.h instead.
	#
	V_PCAP=bpf
elif test -r /usr/include/sys/dlpi.h ; then
	V_PCAP=dlpi
elif test -c /dev/bpf0 ; then		# check again in case not readable
	V_PCAP=bpf
elif test -c /dev/enet ; then		# check again in case not readable
	V_PCAP=enet
elif test -c /dev/nit ; then		# check again in case not readable
	V_PCAP=snit
else
	V_PCAP=null
fi
AC_MSG_RESULT($V_PCAP)

dnl
dnl Now figure out how we get a list of interfaces and addresses,
dnl if we support capturing.  Don't bother if we don't support
dnl capturing.
dnl
if test "$V_PCAP" = null
then
	#
	# We can't capture, so we can't open any capture
	# devices, so we won't return any interfaces.
	#
	V_FINDALLDEVS=null
else
	AC_CHECK_FUNC(getifaddrs,[
		#
		# We have "getifaddrs()"; make sure we have <ifaddrs.h>
		# as well, just in case some platform is really weird.
		#
		AC_CHECK_HEADER(ifaddrs.h,[
		    #
		    # We have the header, so we use "getifaddrs()" to
		    # get the list of interfaces.
		    #
		    V_FINDALLDEVS=getad
		],[
		    #
		    # We don't have the header - give up.
		    # XXX - we could also fall back on some other
		    # mechanism, but, for now, this'll catch this
		    # problem so that we can at least try to figure
		    # out something to do on systems with "getifaddrs()"
		    # but without "ifaddrs.h", if there is something
		    # we can do on those systems.
		    #
		    AC_MSG_ERROR([Your system has getifaddrs() but doesn't have a usable <ifaddrs.h>.])
		])
	],[
		#
		# Well, we don't have "getifaddrs()", so we have to use
		# some other mechanism; determine what that mechanism is.
		#
		# The first thing we use is the type of capture mechanism,
		# which is somewhat of a proxy for the OS we're using.
		#
		case "$V_PCAP" in

		dlpi)
			#
			# This might be Solaris 8 or later, with
			# SIOCGLIFCONF, or it might be some other OS
			# or some older version of Solaris, with
			# just SIOCGIFCONF.
			#
			AC_MSG_CHECKING(whether we have SIOCGLIFCONF)
			AC_CACHE_VAL(ac_cv_lbl_have_siocglifconf,
			    AC_TRY_COMPILE(
				[#include <sys/param.h>
				#include <sys/file.h>
				#include <sys/ioctl.h>
				#include <sys/socket.h>
				#include <sys/sockio.h>],
				[ioctl(0, SIOCGLIFCONF, (char *)0);],
				ac_cv_lbl_have_siocglifconf=yes,
				ac_cv_lbl_have_siocglifconf=no))
			AC_MSG_RESULT($ac_cv_lbl_have_siocglifconf)
			if test $ac_cv_lbl_have_siocglifconf = yes ; then
				V_FINDALLDEVS=glifc
			else
				V_FINDALLDEVS=gifc
			fi
			;;

		*)
			#
			# Assume we just have SIOCGIFCONF.
			# (XXX - on at least later Linux kernels, there's
			# another mechanism, and we should be using that
			# instead.)
			#
			V_FINDALLDEVS=gifc
			;;
		esac])
fi

AC_MSG_CHECKING(if --enable-ipv6 option is specified)
AC_ARG_ENABLE(ipv6, [  --enable-ipv6           build IPv6-capable version])
if test "$enable_ipv6" = "yes"; then
	AC_DEFINE(INET6,1,[IPv6])
fi
AC_MSG_RESULT(${enable_ipv6-no})

AC_MSG_CHECKING(whether to build optimizer debugging code)
AC_ARG_ENABLE(optimizer-dbg, [  --enable-optimizer-dbg  build optimizer debugging code])
if test "$enable_optimizer_dbg" = "yes"; then
	AC_DEFINE(BDEBUG,1,[Enable optimizer debugging])
fi
AC_MSG_RESULT(${enable_optimizer_dbg-no})

AC_MSG_CHECKING(whether to build parser debugging code)
AC_ARG_ENABLE(yydebug, [  --enable-yydebug        build parser debugging code])
if test "$enable_yydebug" = "yes"; then
	AC_DEFINE(YYDEBUG,1,[Enable parser debugging])
fi
AC_MSG_RESULT(${enable_yydebug-no})

case "$V_PCAP" in

dlpi)
	AC_CHECK_HEADERS(sys/bufmod.h sys/dlpi_ext.h)
	AC_MSG_CHECKING(for /dev/dlpi device)
	if test -c /dev/dlpi ; then
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_DEV_DLPI, 1, [define if you have a /dev/dlpi])
	else
		AC_MSG_RESULT(no)
		dir="/dev/dlpi"
		AC_MSG_CHECKING(for $dir directory)
		if test -d $dir ; then
			AC_MSG_RESULT(yes)
			AC_DEFINE_UNQUOTED(PCAP_DEV_PREFIX, "$dir", [/dev/dlpi directory])
		else
			AC_MSG_RESULT(no)
		fi
	fi
	;;

linux)
	AC_MSG_CHECKING(Linux kernel version)
 	if test "$cross_compiling" = yes; then
 		AC_CACHE_VAL(ac_cv_linux_vers,
 		    ac_cv_linux_vers=unknown)
 	else
 		AC_CACHE_VAL(ac_cv_linux_vers,
 		    ac_cv_linux_vers=`uname -r 2>&1 | \
 			sed -n -e '$s/.* //' -e '$s/\..*//p'`)
 	fi
	AC_MSG_RESULT($ac_cv_linux_vers)
 	if test $ac_cv_linux_vers = unknown ; then
 		AC_MSG_ERROR(cannot determine linux version when cross-compiling)
 	fi
	if test $ac_cv_linux_vers -lt 2 ; then
		AC_MSG_ERROR(version 2 or higher required; see the INSTALL doc for more info)
	fi
	AC_LBL_TPACKET_STATS
	;;

dag)
	V_DEFS="$V_DEFS -DDAG_ONLY"
	;;

septel)
	V_DEFS="$V_DEFS -DSEPTEL_ONLY"
	;;

null)
	AC_MSG_WARN(cannot determine packet capture interface)
	AC_MSG_WARN((see the INSTALL doc for more info))
	;;

esac

AC_MSG_CHECKING(whether we have /proc/net/dev)
if test -r /proc/net/dev ; then
	ac_cv_lbl_proc_net_dev=yes
else
	ac_cv_lbl_proc_net_dev=no
fi
if test $ac_cv_lbl_proc_net_dev = yes; then
	AC_DEFINE(HAVE_PROC_NET_DEV, 1, [define if you have a /proc/net/dev])
fi
AC_MSG_RESULT($ac_cv_lbl_proc_net_dev)

# Check for Endace DAG card support.
AC_ARG_WITH([dag], [  --with-dag[[=DIR]]        include Endace DAG support ("yes", "no" or DIR; default="yes" on BSD and Linux if present)],
[
	if test "$withval" = no
	then
		# User doesn't want DAG support.
		want_dag=no
	elif test "$withval" = yes
	then
		# User wants DAG support but hasn't specified a directory.
		want_dag=yes
	else
		# User wants DAG support and has specified a directory, so use the provided value.
		want_dag=yes
		dag_root=$withval
	fi
],[
	#
	# Use DAG API if present, otherwise don't
	#
	want_dag=ifpresent
])

AC_ARG_WITH([dag-includes], [  --with-dag-includes=DIR   Endace DAG include directory],
[
	# User wants DAG support and has specified a header directory, so use the provided value.
	want_dag=yes
	dag_include_dir=$withval
],[])

AC_ARG_WITH([dag-libraries], [  --with-dag-libraries=DIR  Endace DAG library directory],
[
	# User wants DAG support and has specified a library directory, so use the provided value.
	want_dag=yes
	dag_lib_dir=$withval
],[])

case "$V_PCAP" in
linux|bpf|dag)
	#
	# We support the DAG API if we're on Linux or BSD, or if we're
	# building a DAG-only libpcap.
	#
	;;
*)
	#
	# If the user explicitly requested DAG, tell them it's not
	# supported.
	#
	# If they expressed no preference, don't include it.
	#
	if test $want_dag = yes; then
		AC_MSG_ERROR([DAG support is only available with 'linux' 'bpf' and 'dag' packet capture types])
	elif test $want_dag = yes; then
		want_dag=no
	fi
	;;
esac

ac_cv_lbl_dag_api=no
if test "$want_dag" != no; then

	AC_MSG_CHECKING([whether we have DAG API headers])

	# If necessary, set default paths for DAG API headers and libraries.
	if test -z "$dag_root"; then
	    dag_root=/usr/local
	fi

	if test -z "$dag_include_dir"; then
		dag_include_dir="$dag_root/include"
	fi

	if test -z "$dag_lib_dir"; then
	    dag_lib_dir="$dag_root/lib"
	fi
	
	if test -z "$dag_tools_dir"; then
	    dag_tools_dir="$dag_root/tools"
		fi

	if test -r $dag_include_dir/dagapi.h; then
		ac_cv_lbl_dag_api=yes
	fi
	AC_MSG_RESULT([$ac_cv_lbl_dag_api ($dag_include_dir)])
fi

if test $ac_cv_lbl_dag_api = yes; then

	AC_MSG_CHECKING([dagapi.o])	
	dagapi_obj=no
	if test -r $dag_tools_dir/dagapi.o; then
		# 2.4.x.
		dagapi_obj=$dag_tools_dir/dagapi.o
	elif test -r $dag_lib_dir/dagapi.o; then
		# 2.5.x.
		dagapi_obj=$dag_lib_dir/dagapi.o
	elif test -r $dag_lib_dir/libdag.a; then
		# 2.5.x.
		ar x $dag_lib_dir/libdag.a dagapi.o
		if test -r ./dagapi.o; then
		    dagapi_obj=./dagapi.o
		fi
	fi

	if test $dagapi_obj = no; then
		AC_MSG_RESULT([no (checked $dag_lib_dir  $dag_tools_dir  $dag_lib_dir/libdag.a)])
			ac_cv_lbl_dag_api=no
	else
		AC_MSG_RESULT([yes ($dagapi_obj)])
	fi
fi

if test $ac_cv_lbl_dag_api = yes; then

	AC_MSG_CHECKING([dagopts.o])	
	dagopts_obj=no
	if test -r $dag_tools_dir/dagopts.o; then
		# 2.4.x.
		dagopts_obj=$dag_tools_dir/dagopts.o
	elif test -r $dag_lib_dir/dagopts.o; then
		# 2.5.x.
		dagopts_obj=$dag_lib_dir/dagopts.o
	elif test -r $dag_lib_dir/libdag.a; then
		# 2.5.x.
		ar x $dag_lib_dir/libdag.a dagopts.o
		if test -r ./dagopts.o; then
		    dagopts_obj=./dagopts.o
		fi
	fi

	if test $dagopts_obj = no; then
		AC_MSG_RESULT([no (checked $dag_lib_dir  $dag_tools_dir  $dag_lib_dir/libdag.a)])
		ac_cv_lbl_dag_api=no
	else
		AC_MSG_RESULT([yes ($dagopts_obj)])
	fi
fi

if test $ac_cv_lbl_dag_api = yes; then
	# Under 2.5.x only we need to add dagreg.o.
	if test -r $dag_include_dir/dagreg.h; then
		AC_MSG_CHECKING([dagreg.o])	
		dagreg_obj=no
		if test -r $dag_lib_dir/dagreg.o; then
			# Object file is ready and waiting.
			dagreg_obj=$dag_lib_dir/dagreg.o
		elif test -r $dag_lib_dir/libdag.a; then
			# Extract from libdag.a.
			ar x $dag_lib_dir/libdag.a dagreg.o
			if test -r ./dagreg.o; then
				dagreg_obj=./dagreg.o
			fi
		fi

		if test $dagreg_obj = no; then
			AC_MSG_RESULT([no (checked $dag_lib_dir  $dag_lib_dir/libdag.a)])
			ac_cv_lbl_dag_api=no
		else
			AC_MSG_RESULT([yes ($dagreg_obj)])
		fi
	fi
fi

if test $ac_cv_lbl_dag_api = yes; then
	V_INCLS="$V_INCLS -I$dag_include_dir"
	V_LIBS="$V_LIBS $dagapi_obj $dagopts_obj $dagreg_obj"
	if test $V_PCAP != dag ; then
		 SSRC="pcap-dag.c"
	fi

	# See if we can find a general version string.
	# Don't need to save and restore LIBS to prevent -ldag being
	# included if there's a found-action (arg 3).
	saved_ldflags=$LDFLAGS
	LDFLAGS="-L$dag_lib_dir"
	AC_CHECK_LIB([dag], [dag_attach_stream], [dag_version="2.5.x"], [dag_version="2.4.x"])
	LDFLAGS=$saved_ldflags

	# See if we can find a specific version string.
	AC_MSG_CHECKING([the DAG API version])
	if test -r "$dag_root/VERSION"; then
		dag_version="`cat $dag_root/VERSION`"
	fi
	AC_MSG_RESULT([$dag_version])
	AC_DEFINE(HAVE_DAG_API, 1, [define if you have the DAG API])
fi

if test $ac_cv_lbl_dag_api = no; then
	if test "$want_dag" = yes; then
        	# User wanted DAG support but we couldn't find it.
		AC_MSG_ERROR([DAG API requested, but not found at $dag_root: use --without-dag])
	fi

	if test "$V_PCAP" = dag; then
		# User requested "dag" capture type but the DAG API wasn't
		# found.
		AC_MSG_ERROR([Specifying the capture type as "dag" requires the DAG API to be present; use the --with-dag options to specify the location. (Try "./configure --help" for more information.)])
	fi
fi

AC_ARG_WITH(septel, [  --with-septel[[=DIR]]     include Septel support (located in directory DIR, if supplied).  [default=yes, on Linux, if present]],
[
	if test "$withval" = no
	then
		want_septel=no
	elif test "$withval" = yes
	then
		want_septel=yes
		septel_root=
	else
		want_septel=yes
		septel_root=$withval
	fi
],[
	#
	# Use Septel API if present, otherwise don't
	#
	want_septel=ifpresent
	septel_root=./../septel
])
ac_cv_lbl_septel_api=no
case "$V_PCAP" in
linux|septel)
	#
	# We support the Septel API if we're on Linux, or if we're building
	# a Septel-only libpcap.
	#
	;;
*)
	#
	# If the user explicitly requested Septel, tell them it's not
	# supported.
	#
	# If they expressed no preference, don't include it.
	#
	if test $want_septel = yes; then
		AC_MSG_ERROR(Septel support only available with 'linux' and 'septel' packet capture types)
	elif test $want_septel = yes; then
		want_septel=no
	fi
	;;
esac

if test "$with_septel" != no; then
	AC_MSG_CHECKING(whether we have Septel API)

	if test -z "$septel_root"; then
		septel_root=$srcdir/../septel

	fi

	septel_tools_dir="$septel_root"
	septel_include_dir="$septel_root/INC"
	DEF="-DHAVE_SEPTEL_API"

	ac_cv_lbl_septel_api=no
	if test -r "$septel_include_dir/msg.h"; then
		V_INCLS="$V_INCLS -I$septel_include_dir"
		V_DEFS="$V_DEFS $DEF"
		V_LIBS="$V_LIBS $septel_tools_dir/asciibin.o $septel_tools_dir/bit2byte.o $septel_tools_dir/confirm.o $septel_tools_dir/fmtmsg.o $septel_tools_dir/gct_unix.o $septel_tools_dir/hqueue.o $septel_tools_dir/ident.o $septel_tools_dir/mem.o $septel_tools_dir/pack.o $septel_tools_dir/parse.o $septel_tools_dir/pool.o $septel_tools_dir/sdlsig.o $septel_tools_dir/strtonum.o $septel_tools_dir/timer.o $septel_tools_dir/trace.o "

		if test "$V_PCAP" != septel ; then
			 SSRC="pcap-septel.c"

		fi
		ac_cv_lbl_septel_api=yes
	fi

	AC_MSG_RESULT($ac_cv_lbl_septel_api)
	if test $ac_cv_lbl_septel_api = no; then
		if test "$want_septel" = yes; then
			AC_MSG_ERROR(Septel API not found under directory $septel_root; use --without-septel)
		fi
	else
		AC_DEFINE(HAVE_SEPTEL_API, 1, [define if you have a Septel API])
	fi
fi

if test "$V_PCAP" = septel -a "$ac_cv_lbl_septel_api" = no; then
	AC_MSG_ERROR(Specifying the capture type as 'septel' requires the Septel API to be present; use --with-septel=DIR)
fi


AC_LBL_LEX_AND_YACC(V_LEX, V_YACC, pcap_)
if test "$V_LEX" = lex ; then
# Some versions of lex can't handle the definitions section of scanner.l .
# Try lexing it and complain if it can't deal.
	AC_CACHE_CHECK([for capable lex], tcpdump_cv_capable_lex,
		if lex -t scanner.l > /dev/null 2>&1; then
			tcpdump_cv_capable_lex=yes
		else
			tcpdump_cv_capable_lex=insufficient
		fi)
	if test $tcpdump_cv_capable_lex = insufficient ; then
		AC_MSG_ERROR([Your operating system's lex is insufficient to compile
 libpcap.  flex is a lex replacement that has many advantages, including
 being able to compile libpcap.  For more information, see
 http://www.gnu.org/software/flex/flex.html .])
	fi
fi

DYEXT="so"
case "$host_os" in

aix*)
	dnl Workaround to enable certain features
	AC_DEFINE(_SUN,1,[define on AIX to get certain functions])
	;;

hpux9*)
	AC_DEFINE(HAVE_HPUX9,1,[on HP-UX 9.x])
	;;

hpux10.0*)
	;;

hpux10.1*)
	;;

hpux*)
	dnl HPUX 10.20 and above is similar to HPUX 9, but
	dnl not the same....
	dnl
	dnl XXX - DYEXT should be set to "sl" if this is building
	dnl for 32-bit PA-RISC, but should be left as "so" for
	dnl 64-bit PA-RISC or, I suspect, IA-64.
	AC_DEFINE(HAVE_HPUX10_20_OR_LATER,1,[on HP-UX 10.20 or later])
	;;

sinix*)
	AC_MSG_CHECKING(if SINIX compiler defines sinix)
	AC_CACHE_VAL(ac_cv_cc_sinix_defined,
		AC_TRY_COMPILE(
		    [],
		    [int i = sinix;],
		    ac_cv_cc_sinix_defined=yes,
		    ac_cv_cc_sinix_defined=no))
	    AC_MSG_RESULT($ac_cv_cc_sinix_defined)
	    if test $ac_cv_cc_sinix_defined = no ; then
		    AC_DEFINE(sinix,1,[on sinix])
	    fi
	;;

solaris*)
	AC_DEFINE(HAVE_SOLARIS,1,[On solaris])
	;;

darwin*)
	DYEXT="dylib"
	V_CCOPT="$V_CCOPT -fno-common"
	;;
esac

AC_PROG_RANLIB

AC_LBL_DEVEL(V_CCOPT)

AC_LBL_SOCKADDR_SA_LEN

AC_LBL_SOCKADDR_STORAGE

AC_LBL_HP_PPA_INFO_T_DL_MODULE_ID_1

AC_LBL_UNALIGNED_ACCESS

#
# Makefile.in includes rules to generate version.h, so we assume
# that it will be generated if autoconf is used.
#
AC_DEFINE(HAVE_VERSION_H, 1, [define if version.h is generated in the build procedure])

rm -f net
ln -s ${srcdir}/bpf/net net

AC_SUBST(V_CCOPT)
AC_SUBST(V_DEFS)
AC_SUBST(V_INCLS)
AC_SUBST(V_LIBS)
AC_SUBST(V_LEX)
AC_SUBST(V_PCAP)
AC_SUBST(V_FINDALLDEVS)
AC_SUBST(V_RANLIB)
AC_SUBST(V_YACC)
AC_SUBST(SSRC)
AC_SUBST(DYEXT)

AC_PROG_INSTALL

AC_CONFIG_HEADER(config.h)

AC_OUTPUT(Makefile)

if test -f .devel ; then
	make depend
fi
exit 0