libpcap-1.3.0/configure.in

dnl @(#) $Header: /tcpdump/master/libpcap/configure.in,v 1.168 2008-12-23 20:49:26 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

#
# See
#
#	http://ftp.gnu.org/gnu/config/README
#
# for the URLs to use to fetch new versions of config.guess and
# config.sub.
#

AC_REVISION($Revision: 1.168 $)
AC_PREREQ(2.50)
AC_INIT(pcap.c)

AC_CANONICAL_SYSTEM

AC_LBL_C_INIT_BEFORE_CC(V_CCOPT, V_INCLS)
AC_PROG_CC
AC_LBL_C_INIT(V_CCOPT, V_INCLS)
AC_LBL_SHLIBS_INIT
AC_LBL_C_INLINE
AC_C___ATTRIBUTE__

AC_CHECK_HEADERS(sys/bitypes.h)

AC_CHECK_TYPE([int8_t], ,
	[AC_DEFINE([int8_t], [signed char],
	[Define to `signed char' if int8_t not defined.])],
	[AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([u_int8_t], ,
	[AC_DEFINE([u_int8_t], [unsigned char],
	[Define to `unsigned char' if u_int8_t not defined.])],
	[AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([int16_t], ,
	[AC_DEFINE([int16_t], [short],
	[Define to `short' if int16_t not defined.])]
	[AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([u_int16_t], ,
	[AC_DEFINE([u_int16_t], [unsigned short],
	[Define to `unsigned short' if u_int16_t not defined.])],
	[AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([int32_t], ,
	[AC_DEFINE([int32_t], [int],
	[Define to `int' if int32_t not defined.])],
	[AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([u_int32_t], ,
	[AC_DEFINE([u_int32_t], [unsigned int],
	[Define to `unsigned int' if u_int32_t not defined.])],
	[AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([int64_t], ,
	[AC_DEFINE([int64_t], [long long],
	[Define to `long long' if int64_t not defined.])],
	[AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])
AC_CHECK_TYPE([u_int64_t], ,
	[AC_DEFINE([u_int64_t], [unsigned long long],
	[Define to `unsigned long long' if u_int64_t not defined.])],
	[AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif])

#
# Try to arrange for large file support.
#
AC_SYS_LARGEFILE
AC_FUNC_FSEEKO

dnl
dnl Even if <net/bpf.h> were, on all OSes that support BPF, fixed to
dnl include <sys/ioccom.h>, and we were to drop support for older
dnl releases without that fix, so that pcap-bpf.c doesn't need to
dnl include <sys/ioccom.h>, the test program in "AC_LBL_FIXINCLUDES"
dnl in "aclocal.m4" uses it, so we would still have to test for it
dnl and set "HAVE_SYS_IOCCOM_H" if we have it, otherwise
dnl "AC_LBL_FIXINCLUDES" wouldn't work on some platforms such as Solaris.
dnl
AC_CHECK_HEADERS(sys/ioccom.h sys/sockio.h limits.h paths.h)
AC_CHECK_HEADERS(linux/types.h)
AC_CHECK_HEADERS(linux/if_packet.h netpacket/packet.h netpacket/if_packet.h)
AC_CHECK_HEADERS(net/pfvar.h, , , [#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>])
if test "$ac_cv_header_net_pfvar_h" = yes; then
	#
	# Check for various PF actions.
	#
	AC_MSG_CHECKING(whether net/pfvar.h defines PF_NAT through PF_NORDR)
	AC_TRY_COMPILE(
	    [#include <sys/types.h>
	    #include <sys/socket.h>
	    #include <net/if.h>
	    #include <net/pfvar.h>],
	    [return PF_NAT+PF_NONAT+PF_BINAT+PF_NOBINAT+PF_RDR+PF_NORDR;],
	    [
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_PF_NAT_THROUGH_PF_NORDR, 1,
		    [define if net/pfvar.h defines PF_NAT through PF_NORDR])
	    ],
	    AC_MSG_RESULT(no))
fi
AC_CHECK_HEADERS(netinet/if_ether.h, , , [#include <sys/types.h>
#include <sys/socket.h>])
if test "$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,
AC_HELP_STRING([--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})

#
# SITA support is mutually exclusive with native capture support;
# "--with-sita" selects SITA support.
#
AC_ARG_WITH(sita,
AC_HELP_STRING([--with-sita],[include SITA support]),
[
	if test ! "x$withval" = "xno" ; then
		AC_DEFINE(SITA,1,[include ACN support])
		AC_MSG_NOTICE(Enabling SITA ACN support)
		V_PCAP=sita
		V_FINDALLDEVS=sita
	fi
],
[
dnl
dnl Not all versions of test support -c (character special) but it's a
dnl better way of testing since the device might be protected. So we
dnl check in our normal order using -r and then check the for the /dev
dnl guys again using -c.
dnl
dnl XXX This could be done for cross-compiling, but for now it's not.
dnl
if test -z "$with_pcap" && test "$cross_compiling" = yes; then
	AC_MSG_ERROR(pcap type not determined when cross-compiling; use --with-pcap=...)
fi
AC_ARG_WITH(pcap,
AC_HELP_STRING([--with-pcap=TYPE],[use packet capture TYPE]))
AC_MSG_CHECKING(packet capture type)
if test ! -z "$with_pcap" ; then
	V_PCAP="$withval"
elif test -r /dev/bpf -o -h /dev/bpf ; then
	#
	# Cloning BPF device.
	#
	V_PCAP=bpf
	AC_DEFINE(HAVE_CLONING_BPF,1,[define if you have a cloning BPF device])
elif test -r /dev/bpf0 ; then
	V_PCAP=bpf
elif test -r /usr/include/net/pfilt.h ; then
	V_PCAP=pf
elif test -r /dev/enet ; then
	V_PCAP=enet
elif test -r /dev/nit ; then
	V_PCAP=snit
elif test -r /usr/include/sys/net/nit.h ; then
	V_PCAP=nit
elif test -r /usr/include/linux/socket.h ; then
	V_PCAP=linux
elif test -r /usr/include/net/raw.h ; then
	V_PCAP=snoop
elif test -r /usr/include/odmi.h ; then
	#
	# On AIX, the BPF devices might not yet be present - they're
	# created the first time libpcap runs after booting.
	# We check for odmi.h instead.
	#
	V_PCAP=bpf
elif test -c /dev/bpf0 ; then		# check again in case not readable
	V_PCAP=bpf
elif test -r /usr/include/sys/dlpi.h ; then
	V_PCAP=dlpi
elif test -c /dev/enet ; then		# check again in case not readable
	V_PCAP=enet
elif test -c /dev/nit ; then		# check again in case not readable
	V_PCAP=snit
else
	V_PCAP=null
fi
AC_MSG_RESULT($V_PCAP)

#
# Do capture-mechanism-dependent tests.
#
case "$V_PCAP" in
dlpi)
	#
	# Checks to see if Solaris has the public libdlpi(3LIB) library.
	# Note: The existence of /usr/include/libdlpi.h does not mean it is the
	# public libdlpi(3LIB) version. Before libdlpi was made public, a 
	# private version also existed, which did not have the same APIs. 
	# Due to a gcc bug, the default search path for 32-bit libraries does
	# not include /lib, we add it explicitly here.
	# [http://bugs.opensolaris.org/view_bug.do?bug_id=6619485]. 
	# Also, due to the bug above applications that link to libpcap with
	# libdlpi will have to add "-L/lib" option to "configure".
	#
	saved_ldflags=$LDFLAGS
	LDFLAGS="$LIBS -L/lib"
	AC_CHECK_LIB(dlpi, dlpi_walk,
		LIBS="-ldlpi $LIBS"
		V_PCAP=libdlpi
		AC_DEFINE(HAVE_LIBDLPI,1,[if libdlpi exists]),
		V_PCAP=dlpi)
	LDFLAGS=$saved_ldflags

	#
	# Checks whether <sys/dlpi.h> is usable, to catch weird SCO
	# versions of DLPI.
	#
	AC_MSG_CHECKING(whether <sys/dlpi.h> is usable)
	AC_CACHE_VAL(ac_cv_sys_dlpi_usable,
		AC_TRY_COMPILE(
		    [
			#include <sys/types.h>
			#include <sys/time.h>
			#include <sys/dlpi.h>
		    ],
		    [int i = DL_PROMISC_PHYS;],
		    ac_cv_sys_dlpi_usable=yes,
		    ac_cv_sys_dlpi_usable=no))
	AC_MSG_RESULT($ac_cv_sys_dlpi_usable)
	if test $ac_cv_sys_dlpi_usable = no ; then
		AC_MSG_ERROR(<sys/dlpi.h> is not usable on this system; it probably has a non-standard DLPI)
	fi

	#
	# Check whether we have a /dev/dlpi device or have multiple devices.
	#
	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

	#
	# This check is for Solaris with DLPI support for passive modes.
	# See dlpi(7P) for more details.
	#
	AC_LBL_DL_PASSIVE_REQ_T
	;;

linux)
	#
	# Do we have the wireless extensions?
	#
	AC_CHECK_HEADERS(linux/wireless.h, [], [],
	[
#include <sys/socket.h>
#include <linux/if.h>
#include <linux/types.h>
	])

	#
	# Do we have libnl?
	#
	AC_ARG_WITH(libnl,
	AC_HELP_STRING([--without-libnl],[disable libnl support @<:@default=yes, on Linux, if present@:>@]),
		with_libnl=$withval,,)

	if test x$with_libnl != xno ; then
		#
		# Try libnl 2.x first.
		#
		AC_CHECK_LIB(nl, nl_socket_alloc,
		[
			#
			# Yes, we have libnl 2.x.
			#
			LIBS="-lnl-genl -lnl $LIBS"
			AC_DEFINE(HAVE_LIBNL,1,[if libnl exists])
			AC_DEFINE(HAVE_LIBNL_2_x,1,[if libnl exists and is version 2.x])
		],
		[
			#
			# No, we don't; do we have libnl 1.x?
			#
			AC_CHECK_LIB(nl, nl_handle_alloc,
			[
				#
				# Yes.
				#
				LIBS="-lnl $LIBS"
				AC_DEFINE(HAVE_LIBNL,1,[if libnl exists])
			],
			[
				#
				# No, we don't have libnl at all.
				#
				if test x$with_libnl = xyes ; then
					AC_MSG_ERROR([libnl support requested but libnl not found])
				fi
			])
		])
	fi

	AC_CHECK_HEADERS(linux/ethtool.h,,,
	    [
AC_INCLUDES_DEFAULT
#include <linux/types.h>
	    ])
	AC_LBL_TPACKET_STATS
	AC_LBL_LINUX_TPACKET_AUXDATA_TP_VLAN_TCI
	;;

bpf)
	#
	# Check whether we have the *BSD-style ioctls.
	#
	AC_CHECK_HEADERS(net/if_media.h)

	AC_MSG_CHECKING(whether the system supports zerocopy BPF)
	AC_TRY_COMPILE(
	    [#include <sys/socket.h>
	    #include <sys/ioctl.h>
	    #include <net/if.h>
	    #include <net/bpf.h>],
	    [return (BIOCROTZBUF + BPF_BUFMODE_ZBUF);],
	    [  
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_ZEROCOPY_BPF, 1,
		[define if the system supports zerocopy BPF])
	    ],
	    AC_MSG_RESULT(no))

	    #
	    # Check whether we have struct BPF_TIMEVAL.
	    #
	    AC_CHECK_TYPES(struct BPF_TIMEVAL,,,
		[
#include <sys/types.h>
#include <sys/ioctl.h>
#ifdef HAVE_SYS_IOCCOM_H
#include <sys/ioccom.h>
#endif
#include <net/bpf.h>
		    ])
	;;

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

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

snf)
	V_DEFS="$V_DEFS -DSNF_ONLY"
	;;

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

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|libdlpi)
			AC_CHECK_HEADERS(sys/bufmod.h sys/dlpi_ext.h)
			#
			# 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
			#
			# Needed for common functions used by pcap-[dlpi,libdlpi].c
			#
		 	SSRC="dlpisubs.c"
			;;

		*)
			#
			# 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(for socklen_t)
AC_TRY_COMPILE([
	#include <sys/types.h>
	#include <sys/socket.h>
	],
	[ socklen_t x; ],
	have_socklen_t=yes,
	have_socklen_t=no)
if test "x$have_socklen_t" = "xyes"; then
	AC_DEFINE(HAVE_SOCKLEN_T, 1, [define if socklen_t is defined])
fi
AC_MSG_RESULT($have_socklen_t)

AC_ARG_ENABLE(ipv6,
AC_HELP_STRING([--enable-ipv6],[build IPv6-capable version @<:@default=yes, if getaddrinfo available@:>@]),
    [],
    [enable_ipv6=ifavailable])
if test "$enable_ipv6" != "no"; then
	AC_CHECK_FUNC(getaddrinfo,
	    [
		AC_DEFINE(INET6,1,[IPv6])
	    ],
	    [
		if test "$enable_ipv6" != "ifavailable"; then
			AC_MSG_FAILURE([--enable-ipv6 was given, but getaddrinfo isn't available])
		fi
	    ])
fi

AC_MSG_CHECKING(whether to build optimizer debugging code)
AC_ARG_ENABLE(optimizer-dbg,
AC_HELP_STRING([--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,
AC_HELP_STRING([--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})

# Check for Endace DAG card support.
AC_ARG_WITH([dag],
AC_HELP_STRING([--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],
AC_HELP_STRING([--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],
AC_HELP_STRING([--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 $ac_cv_lbl_dag_api = yes; then
	V_INCLS="$V_INCLS -I$dag_include_dir"

	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_streams="1"], [dag_streams="0"])
	AC_CHECK_LIB([dag],[dag_get_erf_types], [
		AC_DEFINE(HAVE_DAG_GET_ERF_TYPES, 1, [define if you have dag_get_erf_types()])])
	AC_CHECK_LIB([dag],[dag_get_stream_erf_types], [
		AC_DEFINE(HAVE_DAG_GET_STREAM_ERF_TYPES, 1, [define if you have dag_get_stream_erf_types()])])

	LDFLAGS=$saved_ldflags

	if test "$dag_streams" = 1; then
		AC_DEFINE(HAVE_DAG_STREAMS_API, 1, [define if you have streams capable DAG API])
		LIBS="$LIBS -ldag"
		LDFLAGS="$LDFLAGS -L$dag_lib_dir"
		
		AC_CHECK_LIB([vdag],[vdag_set_device_info], [ac_dag_have_vdag="1"], [ac_dag_have_vdag="0"])
		if test "$ac_dag_have_vdag" = 1; then
			AC_DEFINE(HAVE_DAG_VDAG, 1, [define if you have vdag_set_device_info()])
			LIBS="$LIBS -lpthread"
		fi
	fi

	AC_DEFINE(HAVE_DAG_API, 1, [define if you have the DAG API])
fi

AC_MSG_CHECKING(whether we have the DAG API)

if test $ac_cv_lbl_dag_api = no; then
	AC_MSG_RESULT(no)
	if test "$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
else
	AC_MSG_RESULT(yes)
fi

AC_ARG_WITH(septel,
AC_HELP_STRING([--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"

	ac_cv_lbl_septel_api=no
	if test -r "$septel_include_dir/msg.h"; then
		V_INCLS="$V_INCLS -I$septel_include_dir"
		ADDLOBJS="$ADDLOBJS $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 $septel_tools_dir/trace.o"
		ADDLARCHIVEOBJS="$ADDLARCHIVEOBJS $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

# Check for Myricom SNF support.
AC_ARG_WITH([snf],
AC_HELP_STRING([--with-snf@<:@=DIR@:>@],[include Myricom SNF support @<:@"yes", "no" or DIR; default="yes" on BSD and Linux if present@:>@]),
[
	if test "$withval" = no
	then
		# User explicitly doesn't want SNF
		want_snf=no
	elif test "$withval" = yes
	then
		# User wants SNF support but hasn't specific a directory.
		want_snf=yes
	else
		# User wants SNF support with a specified directory.
		want_snf=yes
		snf_root=$withval
	fi
],[
	#
	# Use Sniffer API if present, otherwise don't
	#
	want_snf=ifpresent
])

AC_ARG_WITH([snf-includes],
AC_HELP_STRING([--with-snf-includes=DIR],[Myricom SNF include directory]),
[
	# User wants SNF with specific header directory
	want_snf=yes
	snf_include_dir=$withval
],[])

AC_ARG_WITH([snf-libraries],
AC_HELP_STRING([--with-snf-libraries=DIR],[Myricom SNF library directory]),
[
	# User wants SNF with specific lib directory
	want_snf=yes
	snf_lib_dir=$withval
],[])

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

ac_cv_lbl_snf_api=no
if test "$with_snf" != no; then

	AC_MSG_CHECKING(whether we have Myricom Sniffer API)

	if test -z "$snf_root"; then
		snf_root=/opt/snf
	fi

	if test -z "$snf_include_dir"; then
		snf_include_dir="$snf_root/include"
	fi

	if test -z "$snf_lib_dir"; then
		snf_lib_dir="$snf_root/lib"
	fi

	if test -f "$snf_include_dir/snf.h"; then
		ac_cv_lbl_snf_api=yes
	fi
	AC_MSG_RESULT([$ac_cv_lbl_snf_api ($snf_root)])

	if test $ac_cv_lbl_snf_api = no; then
		if test "$want_snf" = yes; then
			AC_MSG_ERROR(SNF API headers not found under $snf_include_dir; use --without-snf)
		fi
	else
		saved_ldflags=$LDFLAGS
		LDFLAGS="$LDFLAGS -L$snf_lib_dir"
		AC_CHECK_LIB([snf], [snf_init], [ac_cv_lbl_snf_api="yes"], [ac_cv_lbl_snf_api="no"])
		LDFLAGS="$saved_ldflags"

		if test $ac_cv_lbl_snf_api = no; then
			if test "$want_snf" = yes; then
				AC_MSG_ERROR(SNF API cannot correctly be linked check config.log; use --without-snf)
			fi
		else
			V_INCLS="$V_INCLS -I$snf_include_dir"
			LIBS="$LIBS -lsnf"
			LDFLAGS="$LDFLAGS -L$snf_lib_dir"
			if test "$V_PCAP" != snf ; then
				SSRC="pcap-snf.c"
			fi
			AC_DEFINE(HAVE_SNF_API, 1, [define if you have Myricom SNF API])
		fi
	fi
fi

if test "$V_PCAP" = snf -a "$ac_cv_lbl_snf_api" = no; then
	AC_MSG_ERROR(Specifying the capture type as 'snf' requires the Myricom Sniffer API to be present; use --with-snf=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

#
# Assume, by default, no support for shared libraries and V7/BSD convention
# for man pages (file formats in section 5, miscellaneous info in section 7).
# Individual cases can override this.
#
DYEXT="none"
MAN_FILE_FORMATS=5
MAN_MISC_INFO=7
case "$host_os" in

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

	#
	# AIX makes it fun to build shared and static libraries,
	# because they're *both* ".a" archive libraries.  We
	# build the static library for the benefit of the traditional
	# scheme of building libpcap and tcpdump in subdirectories of
	# the same directory, with tcpdump statically linked with the
	# libpcap in question, but we also build a shared library as
	# "libpcap.shareda" and install *it*, rather than the static
	# library, as "libpcap.a".
	#
	DYEXT="shareda"

	case "$V_PCAP" in

	dlpi)
		#
		# If we're using DLPI, applications will need to
		# use /lib/pse.exp if present, as we use the
		# STREAMS routines.
		#
		pseexe="/lib/pse.exp"
		AC_MSG_CHECKING(for $pseexe)
		if test -f $pseexe ; then
			AC_MSG_RESULT(yes)
			LIBS="-I:$pseexe"
		fi
		;;

	bpf)
		#
		# If we're using BPF, we need "-lodm" and "-lcfg", as
		# we use them to load the BPF module.
		#
		LIBS="-lodm -lcfg"
		;;
	esac
	;;

darwin*)
	DYEXT="dylib"
	V_CCOPT="$V_CCOPT -fno-common"
	AC_ARG_ENABLE(universal,
	AC_HELP_STRING([--disable-universal],[don't build universal on OS X]))
	if test "$enable_universal" != "no"; then
		case "$host_os" in

		darwin9.*)
			#
			# Leopard.  Build for 32-bit PowerPC, 64-bit
			# PowerPC, x86, and x86-64, with 32-bit PowerPC
			# first.  (That's what Apple does.)
			#
			V_CCOPT="$V_CCOPT -arch ppc -arch ppc64 -arch i386 -arch x86_64"
			LDFLAGS="$LDFLAGS -arch ppc -arch ppc64 -arch i386 -arch x86_64"
			;;

		darwin10.*)
			#
			# Snow Leopard.  Build for x86-64, x86, and
			# 32-bit PowerPC, with x86-64 first.  (That's
			# what Apple does, even though Snow Leopard
			# doesn't run on PPC, so PPC libpcap runs under
			# Rosetta, and Rosetta doesn't support BPF
			# ioctls, so PPC programs can't do live
			# captures.)
			#
			V_CCOPT="$V_CCOPT -arch x86_64 -arch i386 -arch ppc"
			LDFLAGS="$LDFLAGS -arch x86_64 -arch i386 -arch ppc"
			;;

		darwin11.*)
			#
			# Lion.  Build for x86-64 and x86, with x86-64
			# first.  (That's probably what Apple does,
			# given that Rosetta is gone.)
			#
			V_CCOPT="$V_CCOPT -arch x86_64 -arch i386"
			LDFLAGS="$LDFLAGS -arch x86_64 -arch i386"
			;;
		esac
	fi
	;;

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

	#
	# Use System V conventions for man pages.
	#
	MAN_FILE_FORMATS=4
	MAN_MISC_INFO=5
	;;

hpux10.0*)

	#
	# Use System V conventions for man pages.
	#
	MAN_FILE_FORMATS=4
	MAN_MISC_INFO=5
	;;

hpux10.1*)

	#
	# Use System V conventions for man pages.
	#
	MAN_FILE_FORMATS=4
	MAN_MISC_INFO=5
	;;

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])
	if test "`uname -m`" = "ia64"; then
		DYEXT="so"
	else
		DYEXT="sl"
	fi

	#
	# "-b" builds a shared library; "+h" sets the soname.
	#
	SHLIB_OPT="-b"
	SONAME_OPT="+h"

	#
	# Use System V conventions for man pages.
	#
	MAN_FILE_FORMATS=4
	MAN_MISC_INFO=5
	;;

irix*)
	#
	# Use System V conventions for man pages.
	#
	MAN_FILE_FORMATS=4
	MAN_MISC_INFO=5
	;;

linux*|freebsd*|netbsd*|openbsd*|dragonfly*|kfreebsd*|gnu*)
	DYEXT="so"

	#
	# Compiler assumed to be GCC; run-time linker may require a -R
	# flag.
	#
	if test "$libdir" != "/usr/lib"; then
		V_RFLAGS=-Wl,-R$libdir
	fi
	;;

osf*)
	DYEXT="so"

	#
	# Use System V conventions for man pages.
	#
	MAN_FILE_FORMATS=4
	MAN_MISC_INFO=5
	;;

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])

	DYEXT="so"
	#
	# Use System V conventions for man pages.
	#
	MAN_FILE_FORMATS=4
	MAN_MISC_INFO=5
	;;
esac

AC_ARG_ENABLE(shared,
AC_HELP_STRING([--enable-shared],[build shared libraries @<:@default=yes, if support available@:>@]))
test "x$enable_shared" = "xno" && DYEXT="none"

AC_PROG_RANLIB
AC_CHECK_TOOL([AR], [ar])

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_FINDALLDEVS)
AC_SUBST(V_INCLS)
AC_SUBST(V_LEX)
AC_SUBST(V_PCAP)
AC_SUBST(V_SHLIB_CMD)
AC_SUBST(V_SHLIB_OPT)
AC_SUBST(V_SONAME_OPT)
AC_SUBST(V_RPATH_OPT)
AC_SUBST(V_YACC)
AC_SUBST(ADDLOBJS)
AC_SUBST(ADDLARCHIVEOBJS)
AC_SUBST(SSRC)
AC_SUBST(DYEXT)
AC_SUBST(MAN_FILE_FORMATS)
AC_SUBST(MAN_MISC_INFO)

dnl check for USB sniffing support
AC_MSG_CHECKING(for USB sniffing support)
case "$host_os" in
linux*)
	AC_DEFINE(PCAP_SUPPORT_USB, 1, [target host supports USB sniffing])
	USB_SRC=pcap-usb-linux.c
	AC_MSG_RESULT(yes)
	ac_usb_dev_name=`udevinfo -q name -p /sys/class/usb_device/usbmon 2>/dev/null`
	if test $? -ne 0 ; then
	  ac_usb_dev_name="usbmon"
	fi
	AC_DEFINE_UNQUOTED(LINUX_USB_MON_DEV, "/dev/$ac_usb_dev_name", [path for device for USB sniffing])
	AC_MSG_NOTICE(Device for USB sniffing is /dev/$ac_usb_dev_name)
	#
	# Do we have a version of <linux/compiler.h> available?
	# If so, we might need it for <linux/usbdevice_fs.h>.
	#
	AC_CHECK_HEADERS(linux/compiler.h)
	if test "$ac_cv_header_linux_compiler_h" = yes; then
	  #
	  # Yes - include it when testing for <linux/usbdevice_fs.h>.
	  #
	  AC_CHECK_HEADERS(linux/usbdevice_fs.h,,,[#include <linux/compiler.h>])
	else
	  AC_CHECK_HEADERS(linux/usbdevice_fs.h)
	fi
	if test "$ac_cv_header_linux_usbdevice_fs_h" = yes; then
	  #
	  # OK, does it define bRequestType?  Older versions of the kernel
	  # define fields with names like "requesttype, "request", and
	  # "value", rather than "bRequestType", "bRequest", and
	  # "wValue".
	  #
	  AC_MSG_CHECKING(if usbdevfs_ctrltransfer struct has bRequestType member)
	  AC_CACHE_VAL(ac_cv_usbdevfs_ctrltransfer_has_bRequestType,
	    AC_TRY_COMPILE([
AC_INCLUDES_DEFAULT
#ifdef HAVE_SYS_BITYPES_H
#include <sys/bitypes.h>
#endif
#ifdef HAVE_LINUX_COMPILER_H
#include <linux/compiler.h>
#endif
#include <linux/usbdevice_fs.h>],
	      [u_int i = sizeof(((struct usbdevfs_ctrltransfer *)0)->bRequestType)],
	      ac_cv_usbdevfs_ctrltransfer_has_bRequestType=yes,
	      ac_cv_usbdevfs_ctrltransfer_has_bRequestType=no))
	    AC_MSG_RESULT($ac_cv_usbdevfs_ctrltransfer_has_bRequestType)
	    if test $ac_cv_usbdevfs_ctrltransfer_has_bRequestType = yes ; then
	      AC_DEFINE(HAVE_USBDEVFS_CTRLTRANSFER_BREQUESTTYPE,1,
	        [if struct usbdevfs_ctrltransfer has bRequestType])
	    fi
	fi
	;;
*)
	AC_MSG_RESULT(no)
	;;
esac
AC_SUBST(PCAP_SUPPORT_USB)
AC_SUBST(USB_SRC)

dnl check for netfilter sniffing support
AC_MSG_CHECKING(whether the platform could support netfilter sniffing)
case "$host_os" in
linux*)
	AC_MSG_RESULT(yes)
	#
	# Life's too short to deal with trying to get this to compile
	# if you don't get the right types defined with
	# __KERNEL_STRICT_NAMES getting defined by some other include.
	#
	# Check whether the includes Just Work.  If not, don't turn on
	# netfilter support.
	#
	AC_MSG_CHECKING(whether we can compile the netfilter support)
	AC_CACHE_VAL(ac_cv_netfilter_can_compile,
	  AC_TRY_COMPILE([
AC_INCLUDES_DEFAULT
#include <sys/socket.h>
#include <linux/types.h>

#include <linux/netlink.h>
#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nfnetlink_log.h>],
	    [],
	    ac_cv_netfilter_can_compile=yes,
	    ac_cv_netfilter_can_compile=no))
	AC_MSG_RESULT($ac_cv_netfilter_can_compile)
	if test $ac_cv_netfilter_can_compile = yes ; then
	  AC_DEFINE(PCAP_SUPPORT_NETFILTER, 1,
	    [target host supports netfilter sniffing])
	  NETFILTER_SRC=pcap-netfilter-linux.c
	fi
	;;
*)
	AC_MSG_RESULT(no)
	;;
esac
AC_SUBST(PCAP_SUPPORT_NETFILTER)
AC_SUBST(NETFILTER_SRC)

AC_ARG_ENABLE([bluetooth],
[AC_HELP_STRING([--enable-bluetooth],[enable Bluetooth support @<:@default=yes, if support available@:>@])],
,enable_bluetooth=yes)

if test "x$enable_bluetooth" != "xno" ; then
	dnl check for Bluetooth sniffing support
	case "$host_os" in
	linux*)
		AC_CHECK_HEADER(bluetooth/bluetooth.h,
		[
		  AC_DEFINE(PCAP_SUPPORT_BT, 1, [target host supports Bluetooth sniffing])
		  BT_SRC=pcap-bt-linux.c
		  AC_MSG_NOTICE(Bluetooth sniffing is supported)
		],
		AC_MSG_NOTICE(Bluetooth sniffing is not supported; install bluez-lib devel to enable it)
		)
		;;
	*)
		AC_MSG_NOTICE(no Bluetooth sniffing support implemented for $host_os)
		;;
	esac
	AC_SUBST(PCAP_SUPPORT_BT)
	AC_SUBST(BT_SRC)
fi

AC_ARG_ENABLE([canusb],
[AC_HELP_STRING([--enable-canusb],[enable canusb support @<:@default=yes, if support available@:>@])]
,enable_canusb=yes)

if test "x$enable_canusb" != "xno" ; then
	dnl check for canusb support
	case "$host_os" in
	linux*)
		AC_CHECK_HEADER(libusb-1.0/libusb.h,
		[
		    AC_DEFINE(PCAP_SUPPORT_CANUSB, 1, [target host supports canusb])
		    CANUSB_SRC=pcap-canusb-linux.c
		    LIBS="-lusb-1.0 $LIBS"
		    AC_MSG_NOTICE(canusb sniffing is supported)
		],
		AC_MSG_NOTICE(canusb sniffing is not supported; install libusb1.0 lib devel to enable it)
		)
		;;
	*)
		AC_MSG_NOTICE(no canusb support implemented for $host_os)
		;;
	esac
	AC_SUBST(PCAP_SUPPORT_CANUSB)
	AC_SUBST(CANUSB_SRC)
fi

AC_ARG_ENABLE([can],
[AC_HELP_STRING([--enable-can],[enable CAN support @<:@default=yes, if support available@:>@])],
,enable_can=yes)

if test "x$enable_can" != "xno" ; then
	dnl check for CAN sniffing support
	case "$host_os" in
	linux*)
		AC_CHECK_HEADER(linux/can.h,
			[ AC_DEFINE(PCAP_SUPPORT_CAN, 1, [target host supports CAN sniffing])
			CAN_SRC=pcap-can-linux.c
			AC_MSG_NOTICE(CAN sniffing is supported)],
			AC_MSG_NOTICE(CAN sniffing is not supported),
			[#include <sys/socket.h>]
		   )
		;;
	*)
		AC_MSG_NOTICE(no CAN sniffing support implemented for $host_os)
		;;
	esac
	AC_SUBST(PCAP_SUPPORT_CAN)
	AC_SUBST(CAN_SRC)
fi

dnl check for hardware timestamp support
case "$host_os" in
linux*)
	AC_CHECK_HEADERS([linux/net_tstamp.h])
	;;
*)
	AC_MSG_NOTICE(no hardware timestamp support implemented for $host_os)
	;;
esac

AC_PROG_INSTALL

AC_CONFIG_HEADER(config.h)

AC_OUTPUT(Makefile pcap-filter.manmisc pcap-linktype.manmisc
	pcap-tstamp.manmisc pcap-savefile.manfile pcap.3pcap
	pcap_compile.3pcap pcap_datalink.3pcap pcap_dump_open.3pcap
	pcap_list_datalinks.3pcap pcap_list_tstamp_types.3pcap
	pcap_open_dead.3pcap pcap_open_offline.3pcap
	pcap_set_tstamp_type.3pcap)

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