set DEFAULT_PINGER

[thirdparty/squid.git] / configure.in

dnl
dnl  Configuration input file for Squid
dnl
dnl  Duane Wessels, wessels@nlanr.net, February 1996 (autoconf v2.9)
dnl
dnl  $Id: configure.in,v 1.231 2001/09/03 23:38:33 robertc Exp $
dnl
dnl
dnl
AC_INIT(src/main.c)
AC_CONFIG_AUX_DIR(cfgaux)
AM_INIT_AUTOMAKE(Squid, 2.5-DEVEL)
AM_CONFIG_HEADER(include/autoconf.h)
AC_REVISION($Revision: 1.231 $)dnl
AC_PREFIX_DEFAULT(/usr/local/squid)

dnl Set default LDFLAGS
if test -z "$LDFLAGS"; then
        LDFLAGS="-g"
fi

PRESET_CFLAGS="$CFLAGS"

dnl Check for GNU cc
AC_PROG_CC
AM_PROG_CC_C_O
AC_CANONICAL_HOST


CRYPTLIB=''
REGEXLIB=''	# -lregex
LIBREGEX=''	# libregex.a

dnl use directory structure of cached as default (hack)
if test "$libexecdir" = '${exec_prefix}/libexec' &&
   test "$localstatedir" = '${prefix}/var'; then
	libexecdir='${prefix}/libexec/squid'
	localstatedir='${prefix}'
fi

dnl find out the exe extension for this platform. If it's not empty, use it for CGI's as well.
AC_EXEEXT
AC_OBJEXT

if test -z "$EXEEXT"; then
	CGIEXT=".cgi"
else
	CGIEXT="$EXEEXT"
fi

dnl this should be expanded to a list of platform sensible support requirements.
dnl (adding an option like --enable-cygwin-support doesn't make sense :]) - R Collins 2001
case "$host_os" in
cygwin|cygwin32)
        AM_CONDITIONAL(ENABLE_WIN32SPECIFIC, true)
	;;
*)
	AM_CONDITIONAL(ENABLE_WIN32SPECIFIC, false)
	;;
esac

if test -z "$CACHE_HTTP_PORT"; then
	CACHE_HTTP_PORT="3128"
fi
if test -z "$CACHE_ICP_PORT"; then
	CACHE_ICP_PORT="3130"
fi

dnl Subsitutions
AC_SUBST(CACHE_HTTP_PORT)
AC_SUBST(CACHE_ICP_PORT)

AC_DEFINE_UNQUOTED(CONFIG_HOST_TYPE, "$host")


dnl Gerben Wierda <Gerben_Wierda@RnA.nl>
case "$host" in
    mab-next-nextstep3)
	CC="$CC -arch m68k -arch i486 -arch hppa -arch sparc"
	;;
esac

dnl Set Default CFLAGS
if test -z "$PRESET_CFLAGS"; then
    if test "$GCC" = "yes"; then
        case "$host" in
	*-sun-sunos*)
    	    # sunos has too many warnings for this to be useful
	    # motorola too
    	    ;;
	*m88k*)
	    # Motorola cc/ld does not like -02 but is ok on -O
	    CFLAGS=`echo $CFLAGS | sed -e 's/-O[0-9]/-O/'`
	    ;;
        *)
    	    CFLAGS="$CFLAGS -Wall"
    	    ;;
        esac
    else
	case "$host" in
	*mips-sgi-irix6.*)
	    # suggested by Rafael Seidl <rafaels@cthulhu.engr.sgi.com>
	    CFLAGS="$CFLAGS -n32 -mips3 -O3 -OPT:Olimit=0:space=OFF \
		-woff 1009,1014,1048,1110,1116,1185,1188,1204,1230,1233 \
		-Wl,-woff,85,-woff,84,-woff,134 \
		-nostdinc -I/usr/include -D_BSD_SIGNALS"
	    ;;
	alpha-dec-osf4.*)
	    # Mogul says DEC compilers take both -g and -O2
	    CFLAGS=`echo $CFLAGS | sed -e 's/-g/-g3/'`
	    CFLAGS="$CFLAGS -O2"
	    ;;
	*)
	    ;;
	esac
    fi
fi

dnl Set LDFLAGS
if test -z "$PRESET_LDFLAGS"; then
    if test "$GCC" = "yes"; then
        case "$host" in
        *)
    	    # nothing
	    ;;
        esac
    else
	case "$host" in
	*mips-sgi-irix6.*)
	    # suggested by Rafael Seidl <rafaels@cthulhu.engr.sgi.com>
	    LDFLAGS="-n32 -mips3 -nostdlib -L/usr/lib32"
	    ;;
	esac
    fi
fi

dnl Enable optional modules
AC_ARG_ENABLE(dlmalloc,
[  --enable-dlmalloc[=LIB] Compile & use the malloc package by Doug Lea],
[
 case "$enableval" in
 'yes')
    use_dlmalloc="yes"
    LIBDLMALLOC="libdlmalloc.a"
    LIB_MALLOC="-L../lib -ldlmalloc"
    echo "dlmalloc enabled"
    ;;
 'no')
    use_dlmalloc="no"
    echo "dlmalloc disabled"
    ;;
 *) use_dlmalloc="yes"
    LIB_MALLOC="$enableval"
    echo "dlmalloc enabled with $LIB_MALLOC"
 esac
])
if test "${use_dlmalloc-unset}" = unset; then
    case "$host" in
	i386-*-solaris2.*)
		echo "Enabling dlmalloc for $host"
		use_dlmalloc="yes"
		LIBDLMALLOC="libdlmalloc.a"
		LIB_MALLOC="-L../lib -ldlmalloc"
		;;
    esac
fi
if test "x$ac_cv_enabled_dlmalloc" = "xyes"; then
    # Ok. dlmalloc was enabled before, but state may be changed.
    # we have to test these again
    unset ac_cv_func_mallinfo
    unset ac_cv_func_mallocblksize
    unset ac_cv_func_free
    unset ac_cv_func_realloc
    unset ac_cv_func_memalign
    unset ac_cv_func_valloc
    unset ac_cv_func_pvalloc
    unset ac_cv_func_calloc
    unset ac_cv_func_cfree
    unset ac_cv_func_malloc_trim
    unset ac_cv_func_malloc_usable_size
    unset ac_cv_func_malloc_stats
    unset ac_cv_func_mallinfo
    unset ac_cv_func_mallopt
    unset ac_cv_lib_gnumalloc
    unset ac_cv_header_gnumalloc_h
    unset ac_cv_lib_malloc
    unset ac_cv_enabled_dlmalloc
fi
if test "$use_dlmalloc" = yes; then
    ac_cv_func_mallinfo="yes"
    ac_cv_func_mallocblksize="no"
    ac_cv_func_free="yes"
    ac_cv_func_realloc="yes"
    ac_cv_func_memalign="yes"
    ac_cv_func_valloc="yes"
    ac_cv_func_pvalloc="yes"
    ac_cv_func_calloc="yes"
    ac_cv_func_cfree="yes"
    ac_cv_func_malloc_trim="yes"
    ac_cv_func_malloc_usable_size="yes"
    ac_cv_func_malloc_stats="yes"
    ac_cv_func_mallopt="yes"
    ac_cv_lib_gnumalloc="no"
    ac_cv_header_gnumalloc_h="no"
    ac_cv_lib_malloc="no"
    ac_cv_enabled_dlmalloc="yes"
fi

AC_SUBST(LIBDLMALLOC)
AC_SUBST(LIB_MALLOC)

AC_ARG_ENABLE(gnuregex,
[  --enable-gnuregex       Compile GNUregex],
[USE_GNUREGEX=$enableval])

AC_ARG_ENABLE(xmalloc-debug,
[  --enable-xmalloc-debug  Do some simple malloc debugging],
[ if test "$enableval" = "yes" ; then
    echo "Malloc debugging enabled"
    AC_DEFINE(XMALLOC_DEBUG)
  fi
])

AC_ARG_ENABLE(xmalloc-debug-trace,
[  --enable-xmalloc-debug-trace
                          Detailed trace of memory allocations],
[ if test "$enableval" = "yes" ; then
    echo "Malloc debug trace enabled"
    AC_DEFINE(XMALLOC_TRACE)
    AC_DEFINE(XMALLOC_DEBUG)
  fi
])

AC_ARG_ENABLE(xmalloc-statistics,
[  --enable-xmalloc-statistics
                          Show malloc statistics in status page],
[ if test "$enableval" = "yes" ; then
    echo "Malloc statistics enabled"
    AC_DEFINE(XMALLOC_STATISTICS)
  fi
])

AC_ARG_ENABLE(carp,
[  --enable-carp           Enable CARP support],
[ if test "$enableval" = "yes" ; then
    echo "CARP support enabled"
    AC_DEFINE(USE_CARP)
  fi
])

AC_ARG_ENABLE(async-io,
[  --enable-async-io[=N_THREADS]
                          Shorthand for
                          --with-aufs-threads=N_THREADS
                          --with-pthreads
                          --enable-storeio=ufs,aufs],
[ case $enableval in
  yes)
  	with_pthreads=yes
	STORE_MODULES="ufs aufs"
    ;;
  no)
    ;;
  *)
  	aufs_io_threads=$enableval
	with_pthreads=yes
	STORE_MODULES="ufs aufs"
    ;;
  esac
])

AC_ARG_WITH(aufs-threads,
[  --with-aufs-threads=N_THREADS
                          Tune the number of worker threads for the aufs object
                          store.],
[ aufs_io_threads=$withval ])
if test "$aufs_io_threads"; then
    echo "With $aufs_io_threads aufs threads"
    with_pthreads=yes
    AC_DEFINE_UNQUOTED(AUFS_IO_THREADS,$aufs_io_threads)
fi

AC_ARG_WITH(pthreads,
[  --with-pthreads         Use POSIX Threads],
[ if test "$enableval" = "yes"; then
    with_pthreads=yes
  fi
])
if test "$with_pthreads"; then
    echo "With pthreads"
    SQUID_PTHREAD_LIB='$(PTHREADLIB)'
    CFLAGS="$CFLAGS -D_REENTRANT"
    case "$host" in
    i386-unknown-freebsd*)
        if test "$GCC" = "yes" ; then
            if test -z "$PRESET_LDFLAGS"; then
                LDFLAGS="$LDFLAGS -pthread"
            fi
        fi
    ;;
    esac
fi
AC_SUBST(SQUID_PTHREAD_LIB)

AC_ARG_WITH(aio,
[  --with-aio              Use POSIX AIO],
[ if test "$enableval" = "yes"; then
    with_aio=yes
  fi
])
if test "$with_aio"; then
    echo "With aio"
    SQUID_AIO_LIB='$(AIOLIB)'
fi
AC_SUBST(SQUID_AIO_LIB)

AC_ARG_ENABLE(storeio,
[  --enable-storeio=\"list of modules\"
                          Build support for the list of store I/O modules.
                          The default is only to build the "ufs" module.
                          See src/fs for a list of available modules, or
                          Programmers Guide section <not yet written>
                          for details on how to build your custom store module],
[ case $enableval in
  yes)
	for module in $srcdir/src/fs/*; do
	    if test -f $module/Makefile.in; then
		STORE_MODULES="$STORE_MODULES `basename $module`"
	     fi
	done
  	;;
  no)
  	;;
  *)	STORE_MODULES="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
	;;
  esac
],
[ if test -z "$STORE_MODULES"; then
    STORE_MODULES="ufs"
  fi
])
echo "Store modules built: $STORE_MODULES"
STORE_OBJS="fs/lib`echo $STORE_MODULES|sed -e 's% %.a fs/lib%g'`.a"
AC_SUBST(STORE_OBJS)
STORE_LIBS="`echo $STORE_OBJS|sed -e 's%fs/%%g'`"
AC_SUBST(STORE_LIBS)
dnl remove all but diskd - its the only module that needs to recurse
dnl into the sub directory
STORE_MODULE_SUBDIRS=
for fs in $STORE_MODULES none; do
    if test "$fs" = "diskd"; then
        STORE_MODULE_SUBDIRS="$STORE_MODULE_SUBDIRS $fs"
    fi
done
AC_SUBST(STORE_MODULES)
AC_SUBST(STORE_MODULE_SUBDIRS)


dnl --enable-heap-replacement compability option
AC_ARG_ENABLE(heap-replacement,
[  --enable-heap-replacement
                          Backwards compability option. Please use the
			  new --enable-removal-policies directive instead.],
[ if test "$enableval" = "yes" ; then
    echo "--enable-heap-replacement is obsolete. please use the new"
    echo "--enable-removal-policies directive instead"
    sleep 5
    REPL_POLICIES="heap"
  fi
])

AC_ARG_ENABLE(removal-policies,
[  --enable-removal-policies=\"list of policies\"
                          Build support for the list of removal policies.
                          The default is only to build the "lru" module.
                          See src/repl for a list of available modules, or
                          Programmers Guide section 9.9 for details on how
			  to build your custom policy],
[ case $enableval in
  yes)
	for module in $srcdir/src/repl/*; do
	    if test -f $module/Makefile.in; then
		REPL_POLICIES="$REPL_POLICIES `basename $module`"
	    fi
	done
  	;;
  no)
  	;;
  *)	REPL_POLICIES="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
	;;
  esac
],
[ if test -z "$REPL_POLICIES"; then
    REPL_POLICIES="lru"
  fi
])
echo "Removal policies built: $REPL_POLICIES"
AC_SUBST(REPL_POLICIES)
REPL_OBJS="repl/lib`echo $REPL_POLICIES|sed -e 's% %.a repl/lib%g'`.a"
AC_SUBST(REPL_OBJS)
REPL_LIBS="`echo $REPL_OBJS|sed -e 's%repl/%%g'`"
AC_SUBST(REPL_LIBS)

OPT_PINGER=''
OPT_PINGER_EXE=''
AC_ARG_ENABLE(icmp,
[  --enable-icmp           Enable ICMP pinging],
[ if test "$enableval" = "yes" ; then
    echo "ICMP enabled"
    AC_DEFINE(USE_ICMP)
    OPT_PINGER='pinger'
    OPT_PINGER_EXE='pinger$(EXEEXT)'
  fi
])
AC_SUBST(OPT_PINGER)
AC_SUBST(OPT_PINGER_EXE)

AM_CONDITIONAL(USE_DELAY_POOLS, false)
AC_ARG_ENABLE(delay-pools,
[  --enable-delay-pools    Enable delay pools to limit bandwidth usage],
[ if test "$enableval" = "yes" ; then
    echo "Delay pools enabled"
    AC_DEFINE(DELAY_POOLS)
    AM_CONDITIONAL(USE_DELAY_POOLS, true)
  fi
])

AC_ARG_ENABLE(mem-gen-trace,
[  --enable-mem-gen-trace  Do trace of memory stuff],
[ if test "$enableval" = "yes" ; then
    echo "Memory trace (to file) enabled"
    AC_DEFINE(MEM_GEN_TRACE)
  fi    
])     

AC_ARG_ENABLE(useragent-log,
[  --enable-useragent-log  Enable logging of User-Agent header],
[ if test "$enableval" = "yes" ; then
    echo "User-Agent logging enabled"
    AC_DEFINE(USE_USERAGENT_LOG)
  fi
])

AC_ARG_ENABLE(referer-log,
[  --enable-referer-log  Enable logging of Referer header],
[ if test "$enableval" = "yes" ; then
    echo "Referer logging enabled"
    AC_DEFINE(USE_REFERER_LOG)
  fi
])

AC_ARG_ENABLE(wccp,  
[  --disable-wccp      Disable Web Cache Coordination Protocol],
[ if test "$enableval" = "no" ; then
    echo "Web Cache Coordination Protocol disabled"
    AC_DEFINE(USE_WCCP, 0)
  else
    AC_DEFINE(USE_WCCP, 1)
  fi
])      

AC_ARG_ENABLE(kill-parent-hack,
[  --enable-kill-parent-hack
                          Kill parent on shutdown],
[ if test "$enableval" = "yes" ; then
    echo "Kill parent on shutdown"
    AC_DEFINE(KILL_PARENT_OPT)
  fi
])

AM_CONDITIONAL(USE_SNMP, false)
AC_ARG_ENABLE(snmp,
[  --enable-snmp           Enable SNMP monitoring],
[ if test "$enableval" = "yes" ; then
    echo "SNMP monitoring enabled"
    AC_DEFINE(SQUID_SNMP)
    SNMPLIB='-L../snmplib -lsnmp'
    AM_CONDITIONAL(USE_SNMP, true)
    SNMP_MAKEFILE=./snmplib/Makefile
    makesnmplib=snmplib
  fi
])
AC_SUBST(SNMPLIB)
AC_SUBST(makesnmplib)

AC_ARG_ENABLE(time-hack,
[  --enable-time-hack      Update internal timestamp only once per second],
[ if test "$enableval" = "yes" ; then
    echo "Update internal timestamp only once per second"
    AC_DEFINE(ALARM_UPDATES_TIME)
  fi
])

AC_ARG_ENABLE(cachemgr-hostname,
[  --enable-cachemgr-hostname[=hostname]
                          Make cachemgr.cgi default to this host],
[  case $enableval in
   yes)
       AC_DEFINE(CACHEMGR_HOSTNAME,[getfullhostname()])
       echo "Cachemgr default hostname == host where cachemgr runs"
       ;;
   no)
       : # Nothing to do..
       ;;
   *)
       AC_DEFINE_UNQUOTED(CACHEMGR_HOSTNAME,"${enableval}")
       echo "Cachemgr default hostname set to ${enableval}"
       ;;
   esac
])

AC_ARG_ENABLE(arp-acl,
[  --enable-arp-acl        Enable use of ARP ACL lists (ether address)],
[  if test "$enableval" = "yes" ; then
     echo "ARP ACL lists enabled (ether address)"
     case "$host" in
	*-pc-linux-*)
	    ;;
	*)
	    echo "WARNING: ARP ACL support is only currently supported on Linux"
	    echo "         ethernet interfaces, probably won't work on $host."
	    sleep 10
	    ;;
     esac
     AC_DEFINE(USE_ARP_ACL)
   fi
])

AM_CONDITIONAL(ENABLE_HTCP, false)
AC_ARG_ENABLE(htcp,
[  --enable-htcp           Enable HTCP protocol],
[ if test "$enableval" = "yes" ; then
    echo "HTCP enabled"
    AC_DEFINE(USE_HTCP)
    AM_CONDITIONAL(ENABLE_HTCP, true)
  fi
])

AM_CONDITIONAL(ENABLE_SSL, false)
SSLINC=""

AC_ARG_ENABLE(ssl,
[  --enable-ssl            Enable ssl gatewaying support using OpenSSL],
[ if test "$enableval" != "no"; then
    echo "SSL gatewaying enabled"
    AC_DEFINE(USE_SSL)
    AM_CONDITIONAL(ENABLE_SSL, true)
    SSLLIB='-lssl -lcrypto'
    USE_OPENSSL=1
  fi
])

AC_ARG_WITH(openssl,
[  --with-openssl[=prefix]
                          Compile with the OpenSSL libraries. The path to
			  the OpenSSL development libraries and headers
			  installation can be specified if outside of the
			  system standard directories],
[ 
  case "$with_ssl" in
  yes)
    USE_OPENSSL=1
    AM_CONDITIONAL(ENABLE_SSL, true)
    ;;
  no)
    USE_OPENSSL=
    ;;
  *)
    SSLLIBDIR="$with_ssl/lib"
    SSLINC="-I$with_ssl/include"
    USE_OPENSSL=1
    AM_CONDITIONAL(ENABLE_SSL, true)
  esac
])

if test -n "$USE_OPENSSL"; then
  AC_DEFINE(USE_OPENSSL)
  if test -z "$SSLLIB"; then
    SSLLIB="-lcrypto" # for MD5 routines
  fi
fi
if test -n "$SSLLIBDIR"; then
  SSLLIB="-L$SSLLIBDIR $SSLLIB"
fi
AC_SUBST(SSLLIB)
AC_SUBST(SSLINC)

AC_ARG_ENABLE(forw-via-db,
[  --enable-forw-via-db    Enable Forw/Via database],
[ if test "$enableval" = "yes" ; then
    echo "FORW-VIA enabled"
    AC_DEFINE(FORW_VIA_DB)
  fi
])

AC_ARG_ENABLE(cache-digests,
[  --enable-cache-digests  Use Cache Digests
                          see http://www.squid-cache.org/FAQ/FAQ-16.html],
[ if test "$enableval" = "yes" ; then
    echo "USE_CACHE_DIGESTS enabled"
    AC_DEFINE(USE_CACHE_DIGESTS)
  fi
])

dnl Select Error language
AC_ARG_ENABLE(err-language,
[  --enable-err-language=lang
                          Select language for Error pages (see errors dir) ],
[
    if test -d $srcdir/errors/$enableval; then
	ERR_LANGUAGE=$enableval
    else
	echo "ERROR! Unknown language $enableval, see errors/"
	exit 1
    fi
],[ERR_LANGUAGE="English"])
AC_SUBST(ERR_LANGUAGE)

dnl Size of COSS memory buffer
AC_ARG_WITH(coss-membuf-size,
[  --with-coss-membuf-size COSS membuf size (default 1048576 bytes) ],
[  if test "$with_coss_membuf_size"; then
      echo "Setting COSS membuf size to $with_coss_membuf_size bytes"
      AC_DEFINE_UNQUOTED(COSS_MEMBUF_SZ, $with_coss_membuf_size)
   fi
])

dnl Enable poll()
AC_ARG_ENABLE(poll,
[  --enable-poll           Enable poll() instead of select().  Normally poll
                          is preferred over select, but configure knows poll
                          is broken on some platforms.  If you think you are
                          smarter than the configure script, you may enable
                          poll with this option.
  --disable-poll          Disable the use of poll().],
[ 
  case "$enableval" in
  yes)
    echo "Forcing poll() to be enabled"
    ac_cv_func_poll='yes'
    ;;
  no)
    echo "Forcing poll() to be disabled"
    ac_cv_func_poll='no'
    ;;
  esac
])

dnl Disable HTTP violations
AC_ARG_ENABLE(http-violations,
[  --disable-http-violations
                          This allows you to remove code which is known to
                          violate the HTTP protocol specification.],
[ if test "$enableval" = "no" ; then
    echo "Disabling HTTP Violations"
    AC_DEFINE(HTTP_VIOLATIONS, 0)
  else
    AC_DEFINE(HTTP_VIOLATIONS, 1)
  fi
])

dnl Enable IP-Filter Transparent Proxy
AC_ARG_ENABLE(ipf-transparent,
[  --enable-ipf-transparent
                          Enable Transparent Proxy support for systems
                          using IP-Filter network address redirection.],
[ if test "$enableval" = "yes" ; then
	echo "IP-Filter Transparent Proxy enabled"
	AC_DEFINE(IPF_TRANSPARENT)
	IPF_TRANSPARENT="yes"
  fi
])

dnl Enable Linux Netfilter (2.4) Transparent Proxy
AC_ARG_ENABLE(linux-netfilter,
[  --enable-linux-netfilter
                          Enable Transparent Proxy support for Linux 2.4.],
[ if test "$enableval" = "yes" ; then
	echo "Linux-Netfilter Transparent Proxy enabled"
	AC_DEFINE(LINUX_NETFILTER)
	LINUX_NETFILTER="yes"
  fi
])

AM_CONDITIONAL(MAKE_LEAKFINDER, false)
dnl Enable Leak Finding Functions
AC_ARG_ENABLE(leakfinder,
[  --enable-leakfinder
                          Enable Leak Finding code.  Enabling this alone
                          does nothing; you also have to modify the source
			  code to use the leak finding functions.  Probably
			  Useful for hackers only.],
[ if test "$enableval" = "yes" ; then
	echo "Leak-Finding enabled"
	AC_DEFINE(USE_LEAKFINDER)
	USE_LEAKFINDER="yes"
	AM_CONDITIONAL(MAKE_LEAKFINDER, true)
  fi
])

AC_ARG_ENABLE(ident-lookups,
[  --disable-ident-lookups
                          This allows you to remove code that performs
                          Ident (RFC 931) lookups.],
[ if test "$enableval" = "no" ; then
    echo "Disabling Ident Lookups"
    AC_DEFINE(USE_IDENT, 0)
  else
    AC_DEFINE(USE_IDENT, 1)
  fi
])

AM_CONDITIONAL(USE_DNSSERVER, false)
use_dnsserver=
AC_ARG_ENABLE(internal-dns,
[  --disable-internal-dns  This prevents Squid from directly sending and
                          receiving DNS messages, and instead enables the
                          old external 'dnsserver' processes.],
[ if test "$enableval" = "no" ; then
    echo "Disabling Internal DNS queries"
    use_dnsserver="yes"
  fi
])
if test "$use_dnsserver" = "yes"; then
    AC_DEFINE(USE_DNSSERVERS)
    OPT_DNSSERVER_EXE='$(OPT_DNSSERVER_EXE)'
    AM_CONDITIONAL(USE_DNSSERVER, true)
else
    OPT_DNSSERVER_EXE=''
fi
AC_SUBST(OPT_DNSSERVER_EXE)
dnl AC_SUBST(DNSSOURCE)


AC_ARG_ENABLE(truncate,
[  --enable-truncate       This uses truncate() instead of unlink() when
                          removing cache files.  Truncate gives a little
                          performance improvement, but may cause problems
                          when used with async I/O.  Truncate uses more
                          filesystem inodes than unlink..],
[ if test "$enableval" = "yes" ; then
    echo "Enabling truncate instead of unlink"
    AC_DEFINE(USE_TRUNCATE)
  fi
])

dnl Enable underscore in hostnames
AC_ARG_ENABLE(underscores,
[  --enable-underscores    Squid by default rejects any host names with _
                          in their name to conform with internet standards.
                          If you disagree with this you may allow _ in
                          hostnames by using this switch, provided that
                          the resolver library on the host where Squid runs
                          does not reject _ in hostnames...],
[ if test "$enableval" = "yes" ; then
    echo "Enabling the use of underscores in host names"
    AC_DEFINE(ALLOW_HOSTNAME_UNDERSCORES, 1)
  fi
])


dnl Select auth schemes modules to build
AC_ARG_ENABLE(auth,
[  --enable-auth=\"list of auth scheme modules\"
                          Build support for the list of authentication schemes.
                          The default is to build support for the Basic scheme.
                          See src/auth for a list of available modules, or
                          Programmers Guide section authentication schemes
                          for details on how to build your custom auth scheme
                          module],
[ case $enableval in
  yes)
        for module in $srcdir/src/auth/*; do
            if test -f $module/Makefile.in; then
                AUTH_MODULES="$AUTH_MODULES `basename $module`"
            fi
        done
        ;;
  no)
        ;;
  *)    AUTH_MODULES="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
        ;;
  esac
],
[ if test -z "$AUTH_MODULES"; then
    AUTH_MODULES="basic"
  fi
])
echo "Auth scheme modules built: $AUTH_MODULES"
AC_SUBST(AUTH_MODULES)
AUTH_OBJS="auth/lib`echo $AUTH_MODULES|sed -e 's% %.a auth/lib%g'`.a"
AC_SUBST(AUTH_OBJS)
AUTH_LIBS="`echo $AUTH_OBJS|sed -e 's%auth/%%g'`"
AC_SUBST(AUTH_LIBS)

dnl Select basic auth scheme helpers to build
BASIC_AUTH_HELPERS=""
AC_ARG_ENABLE(auth-modules,
[  --enable-auth-modules=\"list of helpers\"
                          Backwards compability alias for
                          --enable-basic-auth-helpers],
[ echo "--enable-auth-modules is obsolete. Please use the new"
  echo "option --enable-basic-auth-helpers"
  sleep 5
  case "$enableval" in
  yes) 
    for helper in $srcdir/src/auth/basic/helpers/*; do
	if test -f $helper/Makefile.in; then
	    BASIC_AUTH_HELPERS="$BASIC_AUTH_HELPERS `basename $helper`"
	fi
    done
    ;;
  no)
    ;;
  *)
    BASIC_AUTH_HELPERS="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
  esac
])
AC_ARG_ENABLE(basic-auth-helpers,
[  --enable-basic-auth-helpers=\"list of helpers\"
                          This option selects which basic scheme proxy_auth
                          helpers to build and install as part of the normal 
                          build process. For a list of available
                          helpers see the src/auth/basic/helpers directory.],
[ case "$enableval" in
  yes) 
    BASIC_AUTH_HELPERS=""
    for helper in $srcdir/src/auth/basic/helpers/*; do
	if test -f $helper/Makefile.in; then
	    BASIC_AUTH_HELPERS="$BASIC_AUTH_HELPERS `basename $helper`"
	fi
    done
    ;;
  no)
    ;;
  *)
    BASIC_AUTH_HELPERS="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
  esac
])
if test -n "$BASIC_AUTH_HELPERS"; then
    echo "Basic auth helpers built: $BASIC_AUTH_HELPERS"
fi
AC_SUBST(BASIC_AUTH_HELPERS)

dnl Select ntlm auth helpers to build
NTLM_AUTH_HELPERS=
AC_ARG_ENABLE(ntlm-auth-helpers,
[  --enable-ntlm-auth-helpers=\"list of helpers\"
                          This option selects which proxy_auth ntlm helpers
                          to build and install as part of the normal build 
                          process. For a list of available modules see
                          the src/auth/ntlm/helpers directory.],
[ case "$enableval" in
  yes) 
    for helper in $srcdir/src/auth/ntlm/helpers/*; do
	if test -f $helper/Makefile.in; then
	    NTLM_AUTH_HELPERS="$NTLM_AUTH_HELPERS `basename $helper`"
	fi
    done
    ;;
  no)
    ;;
  *)
    NTLM_AUTH_HELPERS="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
  esac
])
if test -n "$NTLM_AUTH_HELPERS"; then
    echo "NTLM auth helpers built: $NTLM_AUTH_HELPERS"
fi
AC_SUBST(NTLM_AUTH_HELPERS)

dnl Select digest auth scheme helpers to build
DIGEST_AUTH_HELPERS=
AC_ARG_ENABLE(digest-auth-helpers,
[  --enable-digest-auth-helpers=\"list of helpers\"
                          This option selects which digest scheme authentication
                          helpers to build and install as part of the normal build
                          process. For a list of available modules see the
                          src/auth/digest/helpers directory.],
[ case "$enableval" in
  yes)
    for helper in $srcdir/src/auth/digest/helpers/*; do
        if test -f $helper/Makefile.in; then
            DIGEST_AUTH_HELPERS="$DIGEST_AUTH_HELPERS `basename $helper`"
        fi
    done
    ;;
  no)
    ;;
  *)
    DIGEST_AUTH_HELPERS="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
  esac
])
if test -n "$DIGEST_AUTH_HELPERS"; then
    echo "Digest auth helpers built: $DIGEST_AUTH_HELPERS"
fi
AC_SUBST(DIGEST_AUTH_HELPERS)

dnl Enable "NTLM fail open"
AC_ARG_ENABLE(ntlm-fail-open,
[  --enable-ntlm-fail-open Enable NTLM fail open, where a helper that fails one of the
                           Authentication steps can allow squid to still authenticate
			   the user.],
[ if test "$enableval" = "yes" ; then
    AC_DEFINE(NTLM_FAIL_OPEN)
  fi
])

dnl Disable "unlinkd" code
AC_ARG_ENABLE(unlinkd,
[  --disable-unlinkd       Do not use unlinkd],
[ if test "$enableval" = "no" ; then
    use_unlinkd=no
  else
    use_unlinkd=yes
  fi
],[
    # Here we should probably use some magic depending on the selected
    # storage models
    use_unlinkd=yes
])
if test "$use_unlinkd" = "yes"; then
    echo "unlinkd enabled"
    AC_DEFINE(USE_UNLINKD)
    AM_CONDITIONAL(ENABLE_UNLINKD, true)
else
    echo "unlinkd disabled"
    AM_CONDITIONAL(ENABLE_UNLINKD, false)
fi

dnl Enable backtraces on fatal errors
AC_ARG_ENABLE(stacktraces,
[  --enable-stacktraces    Enable automatic call backtrace on fatal errors],
[ if test "$enableval" = "yes" ; then
    echo "Enabling automatic stack backtraces on fatal errors"
    AC_DEFINE(PRINT_STACK_TRACE, 1)
  fi
])

dnl Enable X-Accelerator-Vary for Vary support within an accelerator setup
AC_ARG_ENABLE(x_accelerator_vary,
[  --enable-x-accelerator-vary	Enable support for the X-Accelerator-Vary
				HTTP header. Can be used to indicate
				variance within an accelerator setup.
				Typically used together with other code
				that adds custom HTTP headers to the requests.],
[ if test "$enableval" = "yes" ; then
    echo "Enabling support for X-Accelerator-Vary"
    AC_DEFINE(X_ACCELERATOR_VARY, 1)
  fi
])

# Force some compilers to use ANSI features
#
case "$host" in
    alpha-dec-osf*)
	if test "$ac_cv_prog_CC" = "cc" ; then
		echo "adding '-std1' to cc args for $host"
		CC="cc -std1";
		ac_cv_prog_CC="$CC"
	fi
	;;
    *-hp-hpux*)
	if test "$ac_cv_prog_CC" = "cc" ; then
		echo "adding '-Ae' to cc args for $host"
		CC="cc -Ae";
		ac_cv_prog_CC="$CC"
	fi
	;;
esac

dnl Check for programs
AC_PROG_CPP
AC_PROG_INSTALL
AC_PROG_RANLIB
AC_PROG_LN_S
AC_PATH_PROG(SH, sh, /bin/sh)
AC_PATH_PROG(FALSE, false, /usr/bin/false)
AC_PATH_PROG(TRUE, true, /usr/bin/true)
AC_PATH_PROG(RM, rm, $FALSE)
AC_PATH_PROG(MV, mv, $FALSE)
AC_PATH_PROG(MKDIR, mkdir, $FALSE)
AC_PATH_PROG(LN, ln, cp)
AC_PATH_PROG(PERL, perl, none)
dnl automake handles this AC_PATH_PROG(MAKEDEPEND, makedepend, $TRUE)
AC_PATH_PROG(AR, ar, $FALSE)

if test "$ac_cv_path_PERL" = "none"; then
	echo "Perl is required to compile Squid"
	echo "Please install Perl and then re-run configure"
	exit 1
fi

case "$host" in
    *-hp-hpux*)
	echo "Disabling 'ranlib' for HP-UX..."
	RANLIB=":"
	;;
esac

dnl set $(AR)
AR_R="$AR r"
case "$host" in
	*-next-nextstep3)
		AR="libtool -o"
		;;
esac
AC_SUBST(AR_R)

dnl Check for headers
AC_HEADER_DIRENT
AC_HEADER_STDC

AC_CHECK_HEADERS( \
	arpa/inet.h \
	arpa/nameser.h \
	assert.h \
	bstring.h \
	config.h \
	crypt.h \
	ctype.h \
	errno.h \
	execinfo.h \
	fcntl.h \
	getopt.h \
	gnumalloc.h \
	grp.h \
	ip_compat.h \
	ip_fil_compat.h \
	ip_fil.h \
	ip_nat.h \
	libc.h \
	limits.h \
	linux/netfilter_ipv4.h \
	malloc.h \
	math.h \
	memory.h \
	mount.h \
	net/if.h \
	netdb.h \
	netinet/if_ether.h \
	netinet/in.h \
	netinet/tcp.h \
	netinet/ip_compat.h \
	netinet/ip_fil_compat.h \
	netinet/ip_fil.h \
	netinet/ip_nat.h \
	openssl/err.h \
	openssl/md5.h \
	openssl/ssl.h \
	poll.h \
	pwd.h \
	regex.h \
	resolv.h \
	sched.h \
	signal.h \
	stdarg.h \
	stddef.h \
	stdio.h \
	stdlib.h \
	string.h \
	strings.h \
	sys/file.h \
	sys/ioctl.h \
	sys/mount.h \
	sys/msg.h \
	sys/param.h \
	sys/resource.h \
	sys/select.h\
	sys/socket.h \
	sys/stat.h \
	sys/statvfs.h \
	sys/syscall.h \
	sys/time.h \
	sys/types.h \
	sys/un.h \
	sys/vfs.h \
	sys/wait.h \
	syslog.h \
	time.h \
	unistd.h \
	varargs.h \
	byteswap.h \
	glib.h \
	stdint.h \
	inttypes.h \
)

AC_C_CONST
AC_C_BIGENDIAN

AC_CACHE_CHECK(if ANSI prototypes work,ac_cv_have_ansi_prototypes, [
  AC_TRY_COMPILE([int foo(char *); int foo (char *bar) {return 1;}],
    [foo("bar")],
    ac_cv_have_ansi_prototypes="yes",
    ac_cv_have_ansi_prototypes="no")
])
if test $ac_cv_have_ansi_prototypes = "yes" ; then
  AC_DEFINE(HAVE_ANSI_PROTOTYPES)
fi

AC_CACHE_CHECK(for tm->tm_gmtoff,ac_cv_have_tm_gmoff, [
  AC_TRY_COMPILE([#include <time.h>
#include <sys/time.h>],
    [struct tm foo;
      foo.tm_gmtoff = 0;],
    ac_cv_have_tm_gmoff="yes",
    ac_cv_have_tm_gmoff="no")
])
if test $ac_cv_have_tm_gmoff = "yes" ; then
  AC_DEFINE(HAVE_TM_GMTOFF)
fi

AC_CACHE_CHECK(for struct mallinfo,ac_cv_have_struct_mallinfo, [
  AC_TRY_COMPILE([#include <sys/types.h>
#if HAVE_MALLOC_H
#include <malloc.h>
#endif],
    [struct mallinfo foo;
    foo.arena = 0;
    foo.ordblks = 0;
    foo.smblks = 0;
    foo.hblks = 0;
    foo.hblkhd = 0;
    foo.uordblks = 0;
    foo.fordblks = 0;
    foo.keepcost = 0;],
    ac_cv_have_struct_mallinfo="yes",
    ac_cv_have_struct_mallinfo="no")
])
if test $ac_cv_have_struct_mallinfo = "yes" ; then
  AC_DEFINE(HAVE_STRUCT_MALLINFO)
fi

AC_CACHE_CHECK(for extended mallinfo,ac_cv_have_ext_mallinfo, [
  AC_TRY_COMPILE([#include <sys/types.h>
#include <malloc.h>],
    [struct mallinfo foo;
      foo.mxfast = 0;],
    ac_cv_have_ext_mallinfo="yes",
    ac_cv_have_ext_mallinfo="no")
])
if test $ac_cv_have_ext_mallinfo = "yes" ; then
  AC_DEFINE(HAVE_EXT_MALLINFO)
fi

AC_CACHE_CHECK(for struct rusage,ac_cv_have_struct_rusage, [
  AC_TRY_COMPILE([
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#if HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif],
    [struct rusage R;],
    ac_cv_have_struct_rusage="yes",
    ac_cv_have_struct_rusage="no")
])
if test $ac_cv_have_struct_rusage = "yes" ; then
  AC_DEFINE(HAVE_STRUCT_RUSAGE)
fi

AC_CACHE_CHECK(for ip->ip_hl, ac_cv_have_ip_hl, [
  AC_TRY_COMPILE([#include <sys/types.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#if defined (__linux__) || defined (__CYGWIN__)
#define ip_hl ihl
#endif
#ifndef __linux__
#ifndef __CYGWIN__
#define iphdr ip
#endif
#endif],
    [struct iphdr ip;
      ip.ip_hl= 0;],
    ac_cv_have_ip_hl="yes",
    ac_cv_have_ip_hl="no")
])
if test $ac_cv_have_ip_hl = "yes" ; then
  AC_DEFINE(HAVE_IP_HL)
fi

dnl Check for typedefs
AC_CHECK_SIZEOF(void *)
AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(long long)
AC_CHECK_SIZEOF(__int64)
AC_CHECK_SIZEOF(int16_t)
AC_CHECK_SIZEOF(uint16_t)
AC_CHECK_SIZEOF(u_int16_t)
AC_CHECK_SIZEOF(int32_t)
AC_CHECK_SIZEOF(uint32_t)
AC_CHECK_SIZEOF(u_int32_t)
AC_CHECK_SIZEOF(int64_t)
AC_CHECK_SIZEOF(uint64_t)
AC_CHECK_SIZEOF(u_int64_t)

dnl int16_t
if test "x$ac_cv_sizeof_short" = "x2"; then
	AC_CHECK_TYPE(int16_t,short)
elif test "x$ac_cv_sizeof_int" = "x2"; then
	AC_CHECK_TYPE(int16_t,int)
fi
dnl u_int16t_t
if test "x$ac_cv_sizeof_uint16_t" = "x2"; then
	AC_CHECK_TYPE(u_int16_t,uint16_t)
elif test "x$ac_cv_sizeof_short" = "x2"; then
	AC_CHECK_TYPE(u_int16_t,unsigned short)
elif test "x$ac_cv_sizeof_int" = "x2"; then
	AC_CHECK_TYPE(u_int16_t,unsigned int)
fi
dnl int32_t
if test "x$ac_cv_sizeof_int" = "x4"; then
	AC_CHECK_TYPE(int32_t,int)
elif "x$ac_cv_sizeof_long" = "x4"; then
	AC_CHECK_TYPE(int32_t,long)
fi
dnl u_int32_t
if test "x$ac_cv_sizeof_uint32_t" = "x4"; then
	AC_CHECK_TYPE(u_int32_t,uint32_t)
elif test "x$ac_cv_sizeof_int" = "x4"; then
	AC_CHECK_TYPE(u_int32_t,unsigned int)
elif test "x$ac_cv_sizeof_long" = "x4"; then
	AC_CHECK_TYPE(u_int32_t,unsigned long)
fi
dnl int64_t
if test "x$ac_cv_sizeof_long" = "x8"; then
	AC_CHECK_TYPE(int64_t,long)
elif test "x$ac_cv_sizeof_long_long" = "x8"; then
	AC_CHECK_TYPE(int64_t,long long)
elif test "x$ac_cv_sizeof___int64" = "x8"; then
	AC_CHECK_TYPE(int64_t,__int64)
fi
dnl u_int64_t
if test "x$ac_cv_sizeof_uint64_t" = "x8"; then
	AC_CHECK_TYPE(u_int64_t,uint64_t)
elif test "x$ac_cv_sizeof_long" = "x8"; then
	AC_CHECK_TYPE(u_int64_t,unsigned long)
elif test "x$ac_cv_sizeof_long_long" = "x8"; then
	AC_CHECK_TYPE(u_int64_t,unsigned long long)
elif test "x$ac_cv_sizeof___int64" = "x8"; then
	AC_CHECK_TYPE(int64_t,unsigned __int64)
fi

AC_CHECK_TYPE(pid_t, int)
AC_CHECK_TYPE(size_t, unsigned int)
AC_CHECK_TYPE(ssize_t, int)
AC_CHECK_TYPE(off_t, int)
AC_CHECK_TYPE(mode_t, u_short)
AC_CHECK_TYPE(fd_mask, int)

dnl Check for special functions
AC_FUNC_ALLOCA


dnl Check for type in sys/socket.h
AC_CACHE_CHECK(for socklen_t, ac_cv_type_socklen_t, [
  AC_EGREP_CPP([socklen_t[^a-zA-Z_0-9]], [#include <sys/types.h>
#include <sys/socket.h>
#if STDC_HEADERS
#include <stdlib.h>
#include <stddef.h>
#endif],
    ac_cv_type_socklen_t=yes,
    ac_cv_type_socklen_t=no)
])
if test $ac_cv_type_socklen_t = no; then
  AC_DEFINE(socklen_t, int)
fi

dnl Check for mtyp_t in some headers
AC_CACHE_CHECK(for mtyp_t, ac_cv_type_mtyp_t, [
  AC_EGREP_CPP([mtyp_t[^a-zA-Z_0-9]], [#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>],
    ac_cv_type_mtyp_t=yes,
    ac_cv_type_mtyp_t=no)
])
if test $ac_cv_type_mtyp_t = no; then
  AC_DEFINE(mtyp_t, long)
 fi

dnl Check for needed libraries
AC_CHECK_LIB(nsl, main)
AC_CHECK_LIB(socket, main)

if test "x$ac_cv_enabled_dlmalloc" = "xyes" ; then
  echo "skipping libmalloc check (--enable-dlmalloc specified)"
else
  AC_CHECK_LIB(gnumalloc, main)
  if test "$ac_cv_lib_gnumalloc_main" = "yes"; then
		echo "Disabling extended malloc functions when using gnumalloc"
		ac_cv_func_mallinfo=no
		ac_cv_func_mallocblksize=no
		ac_cv_func_mallopt=no
  else
		case "$host" in
			*-sun-solaris*)
			  echo "skipping libmalloc check for $host"
				;;
			i386-*-freebsd*)
			  echo "skipping libmalloc check for $host"
				;;
			*)
  
				AC_CHECK_LIB(malloc, main)
				;;
		esac
  fi
fi

AC_CHECK_LIB(bsd, main)
AC_CHECK_LIB(regex, main, [REGEXLIB="-lregex"])
AC_CHECK_LIB(bind, gethostbyname)
if test $ac_cv_lib_bind_gethostbyname = "no" ; then
    case "$host" in
	i386-*-freebsd*)
		echo "skipping libresolv checks for $host"
		;;
	*)
		AC_CHECK_LIB(resolv, inet_aton, AC_CHECK_LIB(44bsd, inet_aton))
		AC_CHECK_LIB(resolv, main)
		;;
    esac
fi
AC_CHECK_LIB(m, main)

dnl Check for libcrypt
dnl We use crypt(3) which may be in libc, or in libcrypt (eg FreeBSD)
AC_CHECK_LIB(crypt, crypt, [CRYPTLIB="-lcrypt"])
AC_SUBST(CRYPTLIB)

dnl Check for libdl, used by auth_modules/PAM
AC_CHECK_LIB(dl, dlopen, [DLLIB="-ldl"])
AC_SUBST(DLLIB)

dnl Check for pthreads
dnl We use pthreads when doing ASYNC I/O
AC_CHECK_LIB(pthread, main, [PTHREADLIB="-lpthread"])
AC_SUBST(PTHREADLIB)

dnl Check for librt
dnl We use AIO in the coss store
AC_CHECK_LIB(rt, aio_read, [AIOLIB="-lrt"])
AC_SUBST(AIOLIB)

dnl -lintl is needed on SCO version 3.2v4.2 for strftime()
dnl Robert Side <rside@aiinc.bc.ca>
dnl Mon, 18 Jan 1999 17:48:00 GMT
case "$host" in
	*-pc-sco3.2*)
		AC_CHECK_LIB(intl, strftime)
		;;
esac

dnl System-specific library modifications
dnl
case "$host" in
	i386-*-solaris2.*)
    		if test "$GCC" = "yes"; then
			echo "Removing -O for gcc on $host"
			CFLAGS="`echo $CFLAGS | sed -e 's/-O[[0-9]]*//'`"
		fi
		;;
	*-sgi-irix*)
        	echo "Removing -lsocket for IRIX..."
        	LIBS=`echo $LIBS | sed -e s/-lsocket//`
        	echo "Removing -lnsl for IRIX..."
        	LIBS=`echo $LIBS | sed -e s/-lnsl//`
		ac_cv_lib_nsl_main=no
		echo "Removing -lbsd for IRIX..."
		LIBS=`echo $LIBS | sed -e s/-lbsd//`
		;;
dnl From: c0032033@ws.rz.tu-bs.de (Joerg Schumacher)
dnl Date: Thu, 17 Oct 1996 04:09:30 +0200
dnl Please change your configure script.  AIX doesn't need -lbsd.
	*-ibm-aix*)
		echo "Removing -lbsd for AIX..."
		LIBS=`echo $LIBS | sed -e s/-lbsd//`
dnl From: mlaster@metavillage.com (Mike Laster)
dnl AIX 4.1.4.x does not have header files for snprintf/vsnprintf
dnl So using the internal versions generates a load of warnings
dnl during compile.
		echo "disabling snprintf/vsnprintf for $host"
		ac_cv_func_snprintf=no
		ac_cv_func_vsnprintf=no
		;;
	*m88k*)
		CFLAGS="$CFLAGS -D_SQUID_MOTOROLA_"
		AC_DEFINE(GETTIMEOFDAY_NO_TZP)
		;;
	[*-*-solaris2.[0-4]])
		AC_DEFINE(GETTIMEOFDAY_NO_TZP)
		;;
	[*-sony-newsos[56]*])
		AC_DEFINE(GETTIMEOFDAY_NO_TZP)
		;;
esac

# Remove optimization for GCC 2.95.[123]
# gcc -O[2] on *BSD and Linux (x86) causes pointers to magically become NULL
if test "$GCC" = "yes"; then
	GCCVER=`$CC -v 2>&1 | awk '$2 ==  "version" {print $3}'`
	case "$GCCVER" in
	[2.95.[123]])
		echo "Removing -O for gcc on $host with GCC $GCCVER"
		CFLAGS="`echo $CFLAGS | sed -e 's/-O[[0-9]]*//'`"
		;;
	esac
fi

# Recommended by Balint Nagy Endre <bne@CareNet.hu>
case "$host" in
	*-univel-sysv4.2MP)
		if test `uname -v` = "2.03"; then
			echo "disabling mallinfo for $host"
			ac_cv_func_mallinfo=no
		fi
		;;
esac

dnl This has to be before AC_CHECK_FUNCS
# Disable poll() on certain platforms. Override by setting ac_cv_func_poll
# when running configure.
if test -z "$ac_cv_func_poll"; then
	case "$host" in
		[alpha-dec-osf3.*])
			# John Kay (jkay@nlanr.net) 19970818
			echo "disabling poll for $host..."
			ac_cv_func_poll='no'
			;;
		[*-hp-hpux*.*])
			# Duane Wessels
			echo "disabling poll for $host..."
			ac_cv_func_poll='no'
			;;
		[*-linux-*])
			# Henrik Nordstrom (hno@hem.passagen.se) 19980817
			# poll is problematic on Linux.  We disable it
			# by default until Linux gets it right.
			rev=`uname -r | awk -F. '{printf "%03d%03d",$1,$2}'`
			if test $rev -lt 002002; then
			    echo "disabling poll for $host < 2.2..."
			    ac_cv_func_poll='no'
			fi
			;;
		[powerpc-ibm-aix4.1.*])
			# Mike Laster (mlaster@metavillage.com) 19981021
			echo "disabling poll for $host..."
			ac_cv_func_poll='no'
			;;
		[*-pc-sco3.2*])
			# Robert Side <rside@aiinc.bc.ca>
			# Mon, 18 Jan 1999 17:48:00 GMT
			echo "disabling poll for $host..."
			ac_cv_func_poll='no'
			;;
	esac
fi

dnl Check for library functions
AC_CHECK_FUNCS(\
	bcopy \
	backtrace_symbols_fd \
	crypt \
	fchmod \
	getdtablesize \
	getpagesize \
	getrusage \
	getspnam \
	lrand48 \
	mallinfo \
	mallocblksize \
	mallopt \
	memcpy \
	memmove \
	memset \
	mkstemp \
	mktime \
	mstats \
	poll \
	pthread_attr_setscope \
	pthread_setschedparam \
	pthread_attr_setschedparam \
	pthread_sigmask \
	putenv \
	random \
	regcomp \
	regexec \
	regfree \
	res_init \
	rint \
	seteuid \
	setgroups \
	setpgrp \
	setrlimit \
	getrlimit \
	setsid \
	sigaction \
	snprintf \
	srand48 \
	srandom \
	statfs \
	sysconf \
	syslog \
	timegm \
	vsnprintf \
	bswap_16 \
	bswap_32 \
)

dnl Yay!  Another Linux brokenness.  Its not good enough
dnl to know that setresuid() exists, because RedHat 5.0 declares
dnl setresuid() but doesn't implement it.
dnl
AC_CACHE_CHECK(if setresuid is implemented, ac_cv_func_setresuid,
  AC_TRY_RUN([
#include <stdlib.h>
  int main() {
    if(setresuid(-1,-1,-1)) {
      perror("setresuid:");
      exit(1);
    }
    exit(0);
  }
  ],ac_cv_func_setresuid="yes",ac_cv_func_setresuid="no")
)
if test "$ac_cv_func_setresuid" = "yes" ; then
  AC_DEFINE(HAVE_SETRESUID)
fi

dnl IP-Filter support requires ipf header files. These aren't
dnl installed by default, so we need to check for them
if test "$IPF_TRANSPARENT" ; then
    AC_MSG_CHECKING(if IP-Filter header files are installed)
    # hold on to your hats...
    if test "$ac_cv_header_ip_compat_h" = "yes" ||
        test "$ac_cv_header_ip_fil_compat_h" = "yes" ||
        test "$ac_cv_header_netinet_ip_compat_h" = "yes" ||
        test "$ac_cv_header_netinet_ip_fil_compat_h" = "yes" ; then
        have_ipfilter_compat_header="yes"
     fi
     if test "x$have_ipfilter_compat_header" = "xyes" &&
       test "$ac_cv_header_ip_fil_h" = "yes" &&
       test "$ac_cv_header_ip_nat_h" = "yes" ; then
        IPF_TRANSPARENT="yes"
        AC_DEFINE(IPF_TRANSPARENT, 1)
    elif test "$have_ipfilter_compat_header" = "yes" &&
         test "$ac_cv_header_netinet_ip_fil_h" = "yes" &&
         test "$ac_cv_header_netinet_ip_nat_h" = "yes" ; then
        IPF_TRANSPARENT="yes"
        AC_DEFINE(IPF_TRANSPARENT, 1)
    else
        IPF_TRANSPARENT="no"
        AC_DEFINE(IPF_TRANSPARENT, 0)
    fi
    AC_MSG_RESULT($IPF_TRANSPARENT)
fi 
if test "$IPF_TRANSPARENT" = "no" ; then
    echo "WARNING: Cannot find necessary IP-Filter header files"
    echo "         Transparent Proxy support WILL NOT be enabled"
    sleep 10
fi

dnl Linux-Netfilter support requires Linux 2.4 kernel header files.
dnl Shamelessly copied from above
if test "$LINUX_NETFILTER" ; then
    AC_MSG_CHECKING(if Linux 2.4 kernel header files are installed)
    # hold on to your hats...
    if test "$ac_cv_header_linux_netfilter_ipv4_h" = "yes"; then
        LINUX_NETFILTER="yes"
        AC_DEFINE(LINUX_NETFILTER, 1)
    else
        LINUX_NETFILTER="no"
        AC_DEFINE(LINUX_NETFILTER, 0)
    fi
    AC_MSG_RESULT($LINUX_NETFILTER)
fi 
if test "$LINUX_NETFILTER" = "no" ; then
    echo "WARNING: Cannot find necessary Linux 2.4 kernel header files"
    echo "         Linux 2.4 Transparent Proxy support WILL NOT be enabled"
    sleep 10
fi

if test -z "$USE_GNUREGEX" ; then
    case "$host" in
    *-sun-solaris2.[[0-4]])
	  USE_GNUREGEX="yes"
	  ;;
    *-next-nextstep*)
	  USE_GNUREGEX="yes"
	  ;;
    esac
fi
AC_MSG_CHECKING(if GNUregex needs to be compiled)
if test -z "$USE_GNUREGEX"; then
if test "$ac_cv_func_regcomp" = "no" || test "$USE_GNUREGEX" = "yes" ; then
	USE_GNUREGEX="yes"
else
	AC_TRY_COMPILE([#include <sys/types.h>
#include <regex.h>],[regex_t t; regcomp(&t,"",0);],
		USE_GNUREGEX="no",
		USE_GNUREGEX="yes")
fi
fi
AC_MSG_RESULT($USE_GNUREGEX)
if test "$USE_GNUREGEX" = "yes"; then
	REGEXLIB="-lregex"
	LIBREGEX="libregex.a"
	AC_DEFINE(USE_GNUREGEX)
fi
AC_SUBST(REGEXLIB)
AC_SUBST(LIBREGEX)

AC_REPLACE_FUNCS(\
	drand48 \
	tempnam \
	strerror \
)

dnl Not cached since people are likely to tune this
AC_MSG_CHECKING(Default FD_SETSIZE value)
AC_TRY_RUN([
#if HAVE_STDIO_H
#include <stdio.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
main() {
	FILE *fp = fopen("conftestval", "w");
	fprintf (fp, "%d\n", FD_SETSIZE);
	exit(0);
}
],
DEFAULT_FD_SETSIZE=`cat conftestval`,
DEFAULT_FD_SETSIZE=256,
DEFAULT_FD_SETSIZE=256)
AC_MSG_RESULT($DEFAULT_FD_SETSIZE)
AC_DEFINE_UNQUOTED(DEFAULT_FD_SETSIZE, $DEFAULT_FD_SETSIZE)

dnl Not cached since people are likely to tune this
AC_MSG_CHECKING(Maximum number of filedescriptors we can open)
dnl damn! FreeBSD's pthreads breaks dup2().
TLDFLAGS="$LDFLAGS"
case $host in
i386-unknown-freebsd*)
    if echo "$LDFLAGS" | grep -q pthread; then
	LDFLAGS=`echo $LDFLAGS | sed -e "s/-pthread//"`
    fi
esac
AC_TRY_RUN([
#include <stdio.h>
#include <unistd.h>
#include <sys/time.h>	/* needed on FreeBSD */
#include <sys/param.h>
#include <sys/resource.h>
main() {
	FILE *fp;
	int i,j;
#if defined(__CYGWIN32__) || defined (__CYGWIN__)
    /* getrlimit and sysconf returns bogous values on cygwin32.
     * Number of fds is virtually unlimited in cygwin (sys/param.h)
     * __CYGWIN32__ is deprecated.
     */
    i = NOFILE;
#else
#if HAVE_SETRLIMIT
    struct rlimit rl;
#if defined(RLIMIT_NOFILE)
    if (getrlimit(RLIMIT_NOFILE, &rl) < 0) {
        perror("getrlimit: RLIMIT_NOFILE");
    } else {
        rl.rlim_cur = rl.rlim_max;      /* set it to the max */
        if (setrlimit(RLIMIT_NOFILE, &rl) < 0) {
            perror("setrlimit: RLIMIT_NOFILE");
        }
    }
#elif defined(RLIMIT_OFILE)
    if (getrlimit(RLIMIT_OFILE, &rl) < 0) {
        perror("getrlimit: RLIMIT_OFILE");
    } else {
        rl.rlim_cur = rl.rlim_max;      /* set it to the max */
        if (setrlimit(RLIMIT_OFILE, &rl) < 0) {
            perror("setrlimit: RLIMIT_OFILE");
        }
    }
#endif /* RLIMIT_NOFILE */
#endif /* HAVE_SETRLIMIT */
	/* by starting at 2^14, we will never get higher
	than 2^15 for SQUID_MAXFD */
        i = j = 1<<14;
        while (j) {
                j >>= 1;
                if (dup2(0, i) < 0) { 
                        i -= j;
                } else {
                        close(i);
                        i += j;
                }
        }
        i++;
#endif /* IF !DEF CYGWIN */
	fp = fopen("conftestval", "w");
	fprintf (fp, "%d\n", i);
	exit(0);
}
],
SQUID_MAXFD=`cat conftestval`,
SQUID_MAXFD=256,
SQUID_MAXFD=256)
AC_MSG_RESULT($SQUID_MAXFD)
AC_DEFINE_UNQUOTED(SQUID_MAXFD, $SQUID_MAXFD)
if test "$SQUID_MAXFD" -lt 512 ; then
    echo "WARNING: $SQUID_MAXFD may not be enough filedescriptors if your"
    echo "         cache will be very busy.  Please see the FAQ page"
    echo "         http://www.squid-cache.org/FAQ/FAQ-11.html#filedescriptors"
    echo "         on how to increase your filedescriptor limit"
    sleep 10
fi
LDFLAGS="$TLDFLAGS"

dnl Not cached since people are likely to tune this
AC_MSG_CHECKING(Default UDP send buffer size)
AC_TRY_RUN([
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
main ()
{
	FILE *fp;
        int fd,val=0,len=sizeof(int);
	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) exit(1);
        if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &val, &len) < 0) exit(1);
	if (val<=0) exit(1);
        fp = fopen("conftestval", "w");
        fprintf (fp, "%d\n", val);
	exit(0);
}
],
SQUID_UDP_SO_SNDBUF=`cat conftestval`,
SQUID_UDP_SO_SNDBUF=16384,
SQUID_UDP_SO_SNDBUF=16384)
AC_MSG_RESULT($SQUID_UDP_SO_SNDBUF)
AC_DEFINE_UNQUOTED(SQUID_UDP_SO_SNDBUF, $SQUID_UDP_SO_SNDBUF)

dnl Not cached since people are likely to tune this
AC_MSG_CHECKING(Default UDP receive buffer size)
AC_TRY_RUN([
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
main ()
{
	FILE *fp;
        int fd,val=0,len=sizeof(int);
	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) exit(1);
        if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &val, &len) < 0) exit(1);
	if (val <= 0) exit(1);
	fp = fopen("conftestval", "w"); 
	fprintf (fp, "%d\n", val);
	exit(0);
}
],
SQUID_UDP_SO_RCVBUF=`cat conftestval`,
SQUID_UDP_SO_RCVBUF=16384,
SQUID_UDP_SO_RCVBUF=16384)
AC_MSG_RESULT($SQUID_UDP_SO_RCVBUF)
AC_DEFINE_UNQUOTED(SQUID_UDP_SO_RCVBUF, $SQUID_UDP_SO_RCVBUF)

dnl Not cached since people are likely to tune this
AC_MSG_CHECKING(Default TCP send buffer size)
AC_TRY_RUN([
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
main ()
{
	FILE *fp;
        int fd,val=0,len=sizeof(int);
	if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) exit(1);
        if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &val, &len) < 0) exit(1);
	if (val <= 0) exit(1);
	fp = fopen("conftestval", "w"); 
	fprintf (fp, "%d\n", val);
	exit(0);
}
],
SQUID_TCP_SO_SNDBUF=`cat conftestval`,
SQUID_TCP_SO_SNDBUF=16384,
SQUID_TCP_SO_SNDBUF=16384)
AC_MSG_RESULT($SQUID_TCP_SO_SNDBUF)
AC_DEFINE_UNQUOTED(SQUID_TCP_SO_SNDBUF, $SQUID_TCP_SO_SNDBUF)

dnl Not cached since people are likely to tune this
AC_MSG_CHECKING(Default TCP receive buffer size)
AC_TRY_RUN([
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
main ()
{
	FILE *fp;
        int fd,val=0,len=sizeof(int);
	if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) exit(1);
        if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &val, &len) < 0) exit(1);
	if (val <= 0) exit(1);
	fp = fopen("conftestval", "w"); 
	fprintf (fp, "%d\n", val);
	exit(0);
}
],
SQUID_TCP_SO_RCVBUF=`cat conftestval`,
SQUID_TCP_SO_RCVBUF=16384,
SQUID_TCP_SO_RCVBUF=16384)
AC_MSG_RESULT($SQUID_TCP_SO_RCVBUF)
AC_DEFINE_UNQUOTED(SQUID_TCP_SO_RCVBUF, $SQUID_TCP_SO_RCVBUF)

AC_CACHE_CHECK(if sys_errlist is already defined, ac_cv_needs_sys_errlist,
  AC_TRY_COMPILE([#include <stdio.h>],[char *s = sys_errlist;],
    ac_cv_needs_sys_errlist="no",
    ac_cv_needs_sys_errlist="yes")
)
if test "$ac_cv_needs_sys_errlist" = "yes" ; then
  AC_DEFINE(NEED_SYS_ERRLIST)
fi

dnl Not cached since people are likely to change this
AC_MSG_CHECKING(for libresolv _dns_ttl_ hack)
AC_TRY_LINK(extern int _dns_ttl_;,return _dns_ttl_;,
[AC_MSG_RESULT(yes)
AC_DEFINE(LIBRESOLV_DNS_TTL_HACK)],
AC_MSG_RESULT(no))

AC_MSG_CHECKING(if inet_ntoa() actually works)
AC_TRY_RUN([
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
main ()
{
	FILE *fp;
	struct in_addr in;
	in.s_addr = inet_addr("1.2.3.4");
	fp = fopen("conftestval", "w"); 
	fprintf (fp, "%s\n", inet_ntoa(in));
	exit(0);
}
],
INET_NTOA_RESULT=`cat conftestval`,
INET_NTOA_RESULT="broken",
INET_NTOA_RESULT="broken")
if test "$INET_NTOA_RESULT" = "1.2.3.4" ; then
	AC_MSG_RESULT("yes")
else
	AC_MSG_RESULT("no")
	echo "Will use our own inet_ntoa()."
	LIBOBJS="$LIBOBJS inet_ntoa.o"
#	echo "WARNING: This looks bad, and probably prevents Squid from working."
#	echo "         If you're on IRIX and using GCC 2.8, you probably need"
#	echo "         to use the IRIX C compiler instead."
#	sleep 10
fi

if test "$ac_cv_header_sys_statvfs_h" = "yes" ; then
AC_MSG_CHECKING(for working statvfs() interface)
AC_TRY_COMPILE([
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/statvfs.h>
],
[
struct statvfs sfs;
sfs.f_blocks = sfs.f_bfree = sfs.f_frsize = 
sfs.f_files = sfs.f_ffree = 0;
statvfs("/tmp", &sfs);
],
  ac_cv_func_statvfs=yes,
  ac_cv_func_statvfs=no)
AC_MSG_RESULT($ac_cv_func_statvfs)
if test "$ac_cv_func_statvfs" = "yes" ; then
  AC_DEFINE(HAVE_STATVFS)
fi
fi

AC_CACHE_CHECK(for _res.nsaddr_list, ac_cv_have_res_nsaddr_list,
AC_TRY_COMPILE([
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#if HAVE_ARPA_NAMESER_H
#include <arpa/nameser.h>
#endif
#if HAVE_RESOLV_H
#include <resolv.h>
#endif
],
[_res.nsaddr_list[[0]];],
ac_cv_have_res_nsaddr_list="yes",
ac_cv_have_res_nsaddr_list="no"))
if test $ac_cv_have_res_nsaddr_list = "yes" ; then
  AC_DEFINE(HAVE_RES_NSADDR_LIST)
fi

if test $ac_cv_have_res_nsaddr_list = "no" ; then
AC_CACHE_CHECK(for _res.ns_list, ac_cv_have_res_ns_list,
AC_TRY_COMPILE([
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#if HAVE_ARPA_NAMESER_H
#include <arpa/nameser.h>
#endif
#if HAVE_RESOLV_H
#include <resolv.h>
#endif
],
[_res.ns_list[[0]].addr;],
ac_cv_have_res_ns_list="yes",
ac_cv_have_res_ns_list="no"))
if test $ac_cv_have_res_ns_list = "yes" ; then
  AC_DEFINE(HAVE_RES_NS_LIST)
fi
fi

dnl Need the debugging version of malloc if available
XTRA_OBJS=''
if test "$ac_cv_lib_malloc_main" = "yes" ; then
	if test -r /usr/lib/debug/malloc.o ; then
		XTRA_OBJS="$XTRA_OBJS /usr/lib/debug/malloc.o"
	fi
	if test -r /usr/lib/debug/mallocmap.o ; then
		XTRA_OBJS="$XTRA_OBJS /usr/lib/debug/mallocmap.o"
	fi
fi

AC_SUBST(XTRA_OBJS)

if test -z "$XTRA_LIBS"; then
	XTRA_LIBS="$LIBS"
	dnl minor cleanup
	XTRA_LIBS=`echo $XTRA_LIBS | sed -e "s/  */ /g"`
	LIBS=''
fi
AC_SUBST(XTRA_LIBS)

dnl Clean up after OSF/1 core dump bug
rm -f core 

dnl FS_MAKEFILES=""
dnl for fs in $STORE_MODULES none; do
dnl 	if test $fs != none; then
dnl	    FS_MAKEFILES="$FS_MAKEFILES ./src/fs/$fs/Makefile"
dnl 	fi
dnl done
dnl REPL_MAKEFILES=""
dnl for repl in $REPL_POLICIES none; do
dnl 	if test $repl != none; then
dnl 	    REPL_MAKEFILES="$REPL_MAKEFILES ./src/repl/$repl/Makefile"
dnl 	fi
dnl done

dnl This could actually be used to find all the Makefiles..
dnl One of Automake's limitations is that it needs to know all the created makefiles.
dnl AUTH_MAKEFILES=""
dnl for auth in `find $srcdir/src/auth -type d -print`; do
dnl 	if test -f $auth/Makefile.in; then
dnl	    dir=`echo $auth | sed -e "s|^$srcdir/||"`
dnl            AUTH_MAKEFILES="$AUTH_MAKEFILES ./$dir/Makefile"
dnl	fi
dnl done


dnl     src/fs/aufs/Makefile \
dnl     src/fs/coss/Makefile \
dnl     src/fs/diskd/Makefile \
dnl     src/fs/null/Makefile \
dnl     src/fs/ufs/Makefile \
dnl     src/repl/heap/Makefile \
dnl     src/repl/lru/Makefile \
AC_OUTPUT([\
	Makefile \
	lib/Makefile \
	include/config.h \
	scripts/Makefile \
	scripts/RunCache \
	scripts/RunAccel \
	src/Makefile \
	src/fs/Makefile \
	src/repl/Makefile \
	src/auth/Makefile \
	src/auth/basic/Makefile \
	src/auth/basic/helpers/Makefile \
	src/auth/basic/helpers/LDAP/Makefile \
	src/auth/basic/helpers/MSNT/Makefile \
	src/auth/basic/helpers/NCSA/Makefile \
	src/auth/basic/helpers/PAM/Makefile \
	src/auth/basic/helpers/SMB/Makefile \
	src/auth/basic/helpers/YP/Makefile \
	src/auth/basic/helpers/getpwnam/Makefile \
	src/auth/basic/helpers/multi-domain-NTLM/Makefile \
	src/auth/digest/Makefile \
	src/auth/digest/helpers/Makefile \
	src/auth/digest/helpers/password/Makefile \
	src/auth/ntlm/Makefile \
	src/auth/ntlm/helpers/Makefile \
	src/auth/ntlm/helpers/fakeauth/Makefile \
	src/auth/ntlm/helpers/no_check/Makefile \
	src/auth/ntlm/helpers/NTLMSSP/Makefile \
	src/auth/ntlm/helpers/NTLMSSP/smbval/Makefile \
	contrib/Makefile \
	snmplib/Makefile \
	icons/Makefile \
	errors/Makefile \
     src/fs/aufs/Makefile \
     src/fs/coss/Makefile \
     src/fs/diskd/Makefile \
     src/fs/null/Makefile \
     src/fs/ufs/Makefile \
     src/repl/heap/Makefile \
     src/repl/lru/Makefile \]
)