Preserve TPROXY socket properties across a reset

[thirdparty/squid.git] / configure.in

dnl  Configuration input file for Squid
dnl
dnl  $Id: configure.in,v 1.497 2008/02/17 09:24:49 serassio Exp $
dnl
dnl
dnl
AC_INIT(Squid Web Proxy, 3.HEAD-BZR, http://www.squid-cache.org/bugs/, squid)
AC_PREREQ(2.52)
AM_CONFIG_HEADER(include/autoconf.h)
AC_CONFIG_AUX_DIR(cfgaux)
AC_CONFIG_SRCDIR([src/main.cc])
AM_INIT_AUTOMAKE([tar-ustar])
AC_REVISION($Revision: 1.497 $)dnl
AC_PREFIX_DEFAULT(/usr/local/squid)
AM_MAINTAINER_MODE

PRESET_CFLAGS="$CFLAGS"
PRESET_LDFLAGS="$LDFLAGS"

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

dnl Check for GNU cc
AC_PROG_CC
AM_PROG_CC_C_O
AC_LANG_C
AC_PROG_CXX
AC_CANONICAL_HOST

dnl Make location configure settings available to the code
AC_DEFINE_UNQUOTED([DEFAULT_SQUID_CONFIG_DIR], "${sysconfdir}" , [Location of Configuration files] )
AC_DEFINE_UNQUOTED([DEFAULT_SQUID_DATA_DIR], "${datadir}" , [Location of other data files] )

use_loadable_modules=1
AC_MSG_CHECKING(whether to use loadable modules)
AC_ARG_ENABLE(loadable-modules,
    [
        AC_HELP_STRING(
            [--disable-loadable-modules],
            [do not support loadable modules])
    ],
    [
        case "${enableval}" in
            yes) use_loadable_modules=yes ;;
            no) use_loadable_modules=no ;;
            *) AC_MSG_ERROR(bad value ${enableval} for --disable-loadable-modules) ;;
        esac
        AC_MSG_RESULT([$use_loadable_modules, explicitly])
    ],
    [
        use_loadable_modules=yes;
        AC_MSG_RESULT([$use_loadable_modules, implicitly])
    ]
)        

AM_CONDITIONAL(USE_LOADABLE_MODULES, test $use_loadable_modules = yes)

if test $use_loadable_modules = yes;
then
    AC_DEFINE(USE_LOADABLE_MODULES, 1, [Support Loadable Modules])
    AC_ENABLE_SHARED
else
    AC_DISABLE_SHARED
fi

AC_LIBTOOL_DLOPEN
if test $use_loadable_modules = yes;
then
    AC_LIBLTDL_CONVENIENCE(lib/libLtdl)
fi
AC_PROG_LIBTOOL
AC_LTDL_DLLIB

# Do we need these unconditionally for "make distcheck" to work?
AC_SUBST(INCLTDL)
AC_SUBST(LIBLTDL)

if test $use_loadable_modules = yes;
then
    # Why is this needed? Should not libtool's AC_LIBTOOL_DLOPEN do that?
    LIBADD_DL=${lt_cv_dlopen_libs}
    AC_SUBST([LIBADD_DL])
fi

AC_PROG_RANLIB


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

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
	# automake automatically adds .exe when installing binaries
	CGIEXT=""
fi
AC_SUBST(CGIEXT)

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
mingw|mingw32|cygwin|cygwin32)
        AM_CONDITIONAL(ENABLE_WIN32SPECIFIC, true)
	;;
*)
	AM_CONDITIONAL(ENABLE_WIN32SPECIFIC, false)
	;;
esac

case "$host_os" in
mingw|mingw32)
	AC_PATH_PROG(WIN32_PSAPI, psapi.dll, none)
	CFLAGS="$CFLAGS -mthreads"
	CXXFLAGS="$CXXFLAGS -mthreads"
	if test "$ac_cv_path_WIN32_PSAPI" = "none"; then
		echo "PSAPI.DLL is recommended to run Squid on Windows NT Platform"
		echo "Please see PSAPI.DLL section on doc/win32-relnotes.html."
	else
		AC_DEFINE(HAVE_WIN32_PSAPI,1,[Define if you have PSAPI.DLL on Windows systems])
		LIBS="$LIBS -lpsapi"
	fi
	MINGW_LIBS="-lmingwex"
	AM_CONDITIONAL(USE_IPC_WIN32, true)
	AC_SUBST(MINGW_LIBS)
	;;
*)
	AM_CONDITIONAL(USE_IPC_WIN32, 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 Substitutions
AC_DEFINE_UNQUOTED(CACHE_HTTP_PORT, $CACHE_HTTP_PORT,
[What default TCP port to use for HTTP listening?])
AC_SUBST(CACHE_HTTP_PORT)
AC_DEFINE_UNQUOTED(CACHE_ICP_PORT, $CACHE_ICP_PORT,
[What default UDP port to use for ICP listening?])
AC_SUBST(CACHE_ICP_PORT)

AC_DEFINE_UNQUOTED(CONFIG_HOST_TYPE, "$host",[Host type from configure])

AC_DEFINE_UNQUOTED(SQUID_CONFIGURE_OPTIONS, "$ac_configure_args", [configure command line used to configure Squid])

CACHE_EFFECTIVE_USER="nobody"
AC_ARG_WITH(default-user,
 [  --with-default-user=USER System user account for squid permissions.
                         default: nobody],
 [ CACHE_EFFECTIVE_USER="$withval" ]
)
AC_SUBST(CACHE_EFFECTIVE_USER)

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

if test "$GCC" = "yes"; then
    GCCVER=`$CC -v 2>&1 | awk '$2 ==  "version" {print $3}'`
    GCCVER2=`echo $GCCVER | awk '{print $1 * 100}'`
    case "$host" in
    i386-*-freebsd*)
	if test $GCCVER2 -lt 300 ; then
	    echo "ERROR: GCC $GCCVER causes a coredump on $host"
	    echo "ERROR: Try a more recent GCC version"
	    sleep 5
	fi
	;;
    esac
    unset GCCVER
    unset GCCVER2
fi

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="-Wall $CFLAGS"
    	    ;;
        esac
    else
	case "$host" in
	*mips-sgi-irix6.*)
	    # suggested by Rafael Seidl <rafaels@cthulhu.engr.sgi.com>
	    CFLAGS="-O3 -OPT:Olimit=0:space=OFF \
		-woff 1009,1014,1110,1116,1183,1185,1188,1204,1230,1233,1355 \
		-Wl,-woff,85,-woff,84,-woff,134 \
		-nostdinc -I/usr/include -D_BSD_SIGNALS $CFLAGS"
	    CXXFLAGS="-O3 -OPT:Olimit=0:space=OFF \
		-woff 1009,1014,1110,1116,1183,1185,1188,1204,1230,1233,1355 \
		-Wl,-woff,85,-woff,84,-woff,134 \
		-nostdinc -I/usr/include -D_BSD_SIGNALS $CXXFLAGS"
	    ;;
	alpha-dec-osf4.*)
	    # Mogul says DEC compilers take both -g and -O2
	    CFLAGS=`echo $CFLAGS | sed -e 's/-g/-g3/'`
	    CFLAGS="-O2 $CFLAGS"
	    ;;
	*)
	    ;;
	esac
    fi
fi

dnl set squid required flags
if test "$GCC" = "yes"; then
dnl Guido Serassio (serassio@squid-cache.org) 20070811
dnl Using the latest MinGW (gcc 3.4.5 + mingw-runtime 3.13) cannot build with
dnl -Wmissing-prototypes -Wmissing-declarations
dnl TODO: check if the problem will be present in any other newer MinGW release.
    case "$host_os" in
    mingw|mingw32)
        SQUID_CFLAGS="-Werror -Wall -Wpointer-arith -Wwrite-strings -Wcomments"
	;;
    *)
        SQUID_CFLAGS="-Werror -Wall -Wpointer-arith -Wwrite-strings -Wmissing-prototypes -Wmissing-declarations -Wcomments"
	;;
    esac
    SQUID_CXXFLAGS="-Werror -Wall -Wpointer-arith -Wwrite-strings -Wcomments"
else
    SQUID_CFLAGS=
    SQUID_CXXFLAGS=
fi
AC_SUBST(SQUID_CFLAGS)
AC_SUBST(SQUID_CXXFLAGS)

AC_TEST_CHECKFORHUGEOBJECTS
SQUID_CXXFLAGS="$SQUID_CXXFLAGS $HUGE_OBJECT_FLAG"

dnl Set LDFLAGS
if test -z "$PRESET_LDFLAGS"; then
    if test "$GCC" = "yes"; then
        case "$host" in
	*mips-sgi-irix6.*)
	    # Silence Linker warnings 84, 85 and 134
    	    LDFLAGS="-Wl,-woff,85 -Wl,-woff,84 -Wl,-woff,134 $LDFLAGS"
    	    ;;
        *)
    	    # nothing
	    ;;
        esac
    else
	case "$host" in
        *)
    	    # nothing
	    ;;
	esac
    fi
fi

AC_ARG_ENABLE(gnuregex,
[  --enable-gnuregex       Compile GNUregex.  Unless you have reason to use this
                          option, you should not enable it.  This library file
                          is usually only required on Windows and very old
                          Unix boxes which do not have their own regex library
                          built in.],
[USE_GNUREGEX=$enableval])

SquidInline="yes"

AC_ARG_ENABLE(optimizations,
[  --disable-optimizations Don't compile Squid with compiler optimizations enabled.
                          Optimization is good for production builds, but not
                          good for debugging. During development, use
                          --disable-optimizations to reduce compilation times
                          and allow easier debugging. This option implicitly
                          also enabled --disable-inline],
[ if test "$enableval" = "no" ; then
	echo "Disabling compiler optimizations (-O flag)"
	CFLAGS="`echo $CFLAGS | sed -e 's/-O[[0-9]]*//'`"
	CXXFLAGS="`echo $CXXFLAGS | sed -e 's/-O[[0-9]]*//'`"
        SquidInline="no"
  fi
])

AC_ARG_ENABLE(inline,
[  --disable-inline        Don't compile trivial methods as inline. Squid
                          is coded with much of the code able to be inlined.
                          Inlining is good for production builds, but not
                          good for development. During development, use
                          --disable-inline to reduce compilation times and
                          allow incremental builds to be quick. For
                          production builds, or load tests, use
                          --enable-inline to have squid make all trivial
                          methods inlinable by the compiler.],
[ if test "$enableval" = "no" ; then
     SquidInline="no"
   fi
])

if test "$SquidInline" = "yes" ; then
    AC_DEFINE(_SQUID_INLINE_, inline, [Keyword used by squid for inlining methods])
    AC_DEFINE(_USE_INLINE_,, [Include inline methods into header file])
else
    echo "Inlining optimization disabled"
    AC_DEFINE(_SQUID_INLINE_,, [Keyword used by squid for inlining methods])
fi

AC_ARG_ENABLE(debug-cbdata,
[  --enable-debug-cbdata   Provide some debug information in cbdata],
[ if test "$enableval" = "yes" ; then
    echo "cbdata debugging enabled"
    AC_DEFINE(CBDATA_DEBUG,1,[Enable for cbdata debug information])
  fi
])

dnl This is a developer only option.. developers know how to set defines
dnl
dnl AC_ARG_ENABLE(xmalloc-debug,
dnl [  --enable-xmalloc-debug  Do some simple malloc debugging],
dnl [ if test "$enableval" = "yes" ; then
dnl     echo "Malloc debugging enabled"
dnl     AC_DEFINE(XMALLOC_DEBUG,1,[Define to do simple malloc debugging])
dnl   fi
dnl ])

dnl This is a developer only option.. developers know how to set defines
dnl
dnl AC_ARG_ENABLE(xmalloc-debug-trace,
dnl [  --enable-xmalloc-debug-trace
dnl                           Detailed trace of memory allocations],
dnl [ if test "$enableval" = "yes" ; then
dnl     echo "Malloc debug trace enabled"
dnl     AC_DEFINE(XMALLOC_TRACE,1,[Define to have a detailed trace of memory allocations])
dnl     AC_DEFINE(XMALLOC_DEBUG,1)
dnl   fi
dnl ])

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,1,[Define to have malloc statistics])
  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.],
[ case $withval in
  [[0-9]]*)
    aufs_io_threads=$withval
    ;;
  *)
    AC_MSG_ERROR(--with-aufs-threads expects a numeric argument)
    ;;
  esac
])
if test "$aufs_io_threads"; then
    echo "With $aufs_io_threads aufs threads"
    AC_DEFINE_UNQUOTED(AUFS_IO_THREADS,$aufs_io_threads,
    [Defines how many threads aufs uses for I/O])
fi

AC_ARG_WITH(pthreads,
[  --with-pthreads         Use POSIX Threads])
if test "$with_pthreads" = "yes"; then
    echo "With pthreads"
fi

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

AC_ARG_WITH(dl,
[  --with-dl               Use dynamic linking])
if test "$with_dl" = "yes"; then
    echo "With dl"
fi

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 dir in $srcdir/src/fs/*; do
	    module="`basename $dir`"
	    if test -d "$dir" && test "$module" != CVS; then
		STORE_MODULES="$STORE_MODULES $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
])
if test -n "$STORE_MODULES"; then
    for module in $STORE_MODULES; do
	if test -d $srcdir/src/fs/$module; then
	    :
	else
	    AC_MSG_ERROR(storeio $module does not exist)
	fi
    done
    echo "Store modules built: $STORE_MODULES"
    STORE_LINKOBJS=
    for module in $STORE_MODULES; do
        STORE_LINKOBJS="$STORE_LINKOBJS fs/${module}/StoreFS${module}.o"
    done
fi
dnl remove all but diskd - its the only module that needs to recurse
dnl into the sub directory
UFS_FOUND=
NEED_UFS=
NEED_BLOCKING=
NEED_DISKDAEMON=
NEED_DISKTHREADS=
NEED_AIO=
STORE_TESTS=
for fs in $STORE_MODULES none; do
    case "$fs" in
    diskd)
	NEED_UFS="true"
	NEED_BLOCKING="true"
	NEED_DISKDAEMON="true"
	;;
    aufs)
	NEED_UFS="true"
	NEED_BLOCKING="true"
	NEED_DISKTHREADS="true"
	;;
    coss)
	NEED_AIO="true"
	dnl
	dnl Automake om MinGW needs explicit exe extension
	dnl for STORE_TESTS substition
	dnl
	STORE_TESTS="$STORE_TESTS tests/testCoss$EXEEXT"
	;;
    ufs)
	UFS_FOUND="true"
	STORE_TESTS="$STORE_TESTS tests/testUfs$EXEEXT"
    esac
done
STORE_OBJS=
STORE_LIBS=
dnl We have 'fake' modules - aufs and diskd - legacy.
for fs in $STORE_MODULES; do
    case "$fs" in
    diskd);;
    aufs);;
    *)
      STORE_OBJS="$STORE_OBJS fs/lib${fs}.a"
      STORE_LIBS="$STORE_LIBS lib${fs}.a"
      ;;
    esac
done

if test -z "$UFS_FOUND" && test -n "$NEED_UFS"; then
    echo "adding UFS, as it contains core logic for diskd and aufs"
    STORE_OBJS="$STORE_OBJS fs/libufs.a"
    STORE_LIBS="$STORE_LIBS libufs.a"
    STORE_MODULES="$STORE_MODULES ufs"
    STORE_LINKOBJS="$STORE_LINKOBJS fs/ufs/StoreFSufs.o"
    dnl
    dnl Automake om MinGW needs explicit exe extension
    dnl for STORE_TESTS substition
    dnl
    STORE_TESTS="$STORE_TESTS tests/testUfs$EXEEXT"
fi
  
AC_SUBST(STORE_OBJS)
AC_SUBST(STORE_LIBS)
AC_SUBST(STORE_LINKOBJS)
AC_SUBST(STORE_TESTS)

AC_ARG_ENABLE(disk-io,
[  --enable-disk-io=\"list of modules\"
                          Build support for the list of disk I/O modules.
                          The default is only to build the "Blocking" module.
                          See src/DiskIO for a list of available modules, or
                          Programmers Guide section <not yet written>
                          for details on how to build your custom disk module],
[ case $enableval in
  yes)
	for dir in $srcdir/src/DiskIO/*; do
	    module="`basename $dir`"
	    if test -d "$dir" && test "$module" != CVS; then
		DISK_MODULES="$DISK_MODULES $module"
	    fi
	done
  	;;
  no)
  	;;
  *)
	DISK_MODULES="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
	;;
  esac
],
[ if test -z "$DISK_MODULES"; then
    DISK_MODULES="Blocking"
  fi
])
if test -n "$DISK_MODULES"; then
    for module in $DISK_MODULES; do
	if test -d $srcdir/src/DiskIO/$module; then
	    :
	else
	    AC_MSG_ERROR(disk-io $module does not exist)
	fi
    done
    DISK_LIBS="lib`echo $DISK_MODULES|sed -e 's% %.a lib%g'`.a"
    DISK_LINKOBJS=
    for module in $DISK_MODULES; do
        DISK_LINKOBJS="$DISK_LINKOBJS DiskIO/${module}/${module}DiskIOModule.o"
    done
fi
for fs in $DISK_MODULES none; do
    case "$fs" in
    DiskDaemon)
	DISK_PROGRAMS="$DISK_PROGRAMS DiskIO/DiskDaemon/diskd"
	FOUND_DISKDAEMON="true"
	;;
    DiskThreads)
	FOUND_DISKTHREADS="true"
	;;
    AIO)
    	FOUND_AIO="true"
	;;
    Blocking)
	FOUND_BLOCKING="true"
    esac
done

if test -z "$FOUND_BLOCKING" && test -n "$NEED_BLOCKING"; then
    echo "adding Blocking, as it is used by an active, legacy Store Module"
    DISK_LIBS="$DISK_LIBS libBlocking.a"
    DISK_MODULES="$DISK_MODULES Blocking"
    DISK_LINKOBJS="$DISK_LINKOBJS DiskIO/Blocking/BlockingDiskIOModule.o"
fi

if test -z "$FOUND_DISKDAEMON" && test -n "$NEED_DISKDAEMON"; then
    echo "adding DiskDaemon, as it is used by an active, legacy Store Module"
    DISK_LIBS="$DISK_LIBS libDiskDaemon.a"
    DISK_MODULES="$DISK_MODULES DiskDaemon"
    DISK_PROGRAMS="$DISK_PROGRAMS DiskIO/DiskDaemon/diskd"
    DISK_LINKOBJS="$DISK_LINKOBJS DiskIO/DiskDaemon/DiskDaemonDiskIOModule.o"
fi

if test -z "$FOUND_DISKTHREADS" && test -n "$NEED_DISKTHREADS"; then
    echo "adding DiskThreads, as it is used by an active, legacy Store Module"
    DISK_LIBS="$DISK_LIBS libDiskThreads.a"
    DISK_MODULES="$DISK_MODULES DiskThreads"
    DISK_LINKOBJS="$DISK_LINKOBJS DiskIO/DiskThreads/DiskThreadsDiskIOModule.o"
fi

if test -z "$FOUND_AIO" && test -n "$NEED_AIO"; then
    echo "adding AIO, as it is used by an active, legacy Store Module"
    DISK_LIBS="$DISK_LIBS libAIO.a"
    DISK_MODULES="$DISK_MODULES AIO"
    DISK_LINKOBJS="$DISK_LINKOBJS DiskIO/AIO/AIODiskIOModule.o"
fi
echo "IO Modules built: $DISK_MODULES"
USE_AIOPS_WIN32=0
USE_AIO_WIN32=0
dnl we know what is being built. now add dependencies.
for fs in $DISK_MODULES none; do
    case "$fs" in
    DiskThreads)
	if test -z "$with_pthreads"; then
            case "$host_os" in
            mingw|mingw32)
        	USE_AIOPS_WIN32=1
	        echo "DiskThreads IO Module used, Windows threads support automatically enabled"
                ;;
            *)
	        echo "DiskThreads IO Module used, pthreads support automatically enabled"
	        with_pthreads=yes
                ;;
            esac
	fi
	;;
    AIO)
	if test -z "$with_aio"; then
            case "$host_os" in
            mingw|mingw32)
        	USE_AIO_WIN32=1
	        echo "Aio IO Module used, Windows overlapped I/O support automatically enabled"
                ;;
            *)
	        echo "Aio IO Module used, aio support automatically enabled"
	        with_aio=yes
                ;;
            esac
	fi
	;;
    esac
done

AC_SUBST(DISK_LIBS)
AC_SUBST(DISK_PROGRAMS)
AC_SUBST(DISK_LINKOBJS)
AM_CONDITIONAL([USE_AIOPS_WIN32], [test "$USE_AIOPS_WIN32" = 1])
AM_CONDITIONAL([USE_AIO_WIN32], [test "$USE_AIO_WIN32" = 1])

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 dir in $srcdir/src/repl/*; do
	    module="`basename $dir`"
	    if test -d "$dir" && test "$module" != CVS; then
		REPL_POLICIES="$REPL_POLICIES $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
])
if test -n "$REPL_POLICIES"; then
    for module in $REPL_POLICIES; do
	if test -d $srcdir/src/repl/$module; then
	    :
	else
	    AC_MSG_ERROR(Removal policy $module does not exist)
	fi
    done
    echo "Removal policies built: $REPL_POLICIES"
    REPL_OBJS="repl/lib`echo $REPL_POLICIES|sed -e 's% %.a repl/lib%g'`.a"
    REPL_LIBS="`echo $REPL_OBJS|sed -e 's%repl/%%g'`"
fi
AC_SUBST(REPL_POLICIES)
AC_SUBST(REPL_OBJS)
AC_SUBST(REPL_LIBS)

AM_CONDITIONAL(ENABLE_PINGER, false)
AC_ARG_ENABLE(icmp,
[  --enable-icmp           Enable ICMP pinging],
[ if test "$enableval" = "yes" ; then
    echo "ICMP enabled"
    AC_DEFINE(USE_ICMP,1,
    [ Defined this to use Squid's ICMP features (highly recommended!)
      When USE_ICMP is defined, Squid will send ICMP pings to origin server sites.])
    AM_CONDITIONAL(ENABLE_PINGER, true)
  fi
])

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],1,[Traffic management via "delay pools".])
    AM_CONDITIONAL(USE_DELAY_POOLS, true,)
  fi
])

dnl disable generic/common adaptation support by default
use_adaptation=no

AM_CONDITIONAL(USE_ESI, false)
AC_ARG_ENABLE(esi,
              AC_HELP_STRING([--enable-esi],[Enable ESI for accelerators. Requires libexpat. Enabling ESI will cause squid to follow the Edge Acceleration Specification (www.esi.org). This causes squid to IGNORE client Cache-Control headers. DO NOT use this in a squid configured as a web proxy, ONLY use it in a squid configured for webserver acceleration.]),
	      use_esi=$enableval, use_esi=no)
if test "$use_esi" = "yes" ; then
  AC_DEFINE(USE_SQUID_ESI,1,[Compile the ESI processor and Surrogate header support])
  AM_CONDITIONAL(USE_ESI, true)
  XTRA_LIBS="$XTRA_LIBS -lexpat -lxml2"
else
  AC_DEFINE(USE_SQUID_ESI,0,[Compile the ESI processor and Surrogate header support])
fi

AM_CONDITIONAL(USE_ICAP_CLIENT, false)
AC_ARG_ENABLE(icap-client,
              AC_HELP_STRING([--enable-icap-client],[Enable the ICAP client.]),
	      use_icap_client=$enableval, use_icap_client=no)
if test "$use_icap_client" = "yes" ; then
  AC_DEFINE(ICAP_CLIENT,1,[Enable ICAP client features in Squid])
  AM_CONDITIONAL(USE_ICAP_CLIENT, true)
  ICAP_LIBS="ICAP/libicap.la"
  use_adaptation=yes
else
  AC_DEFINE(ICAP_CLIENT,0,[Enable ICAP client features in Squid])
  ICAP_LIBS=""
fi
AC_SUBST(ICAP_LIBS)

use_ecap=1
AC_MSG_CHECKING(whether to support eCAP)
AC_ARG_ENABLE(ecap,
    [
        AC_HELP_STRING(
            [--enable-ecap],
            [support loadable content adaptation modules])
    ],
    [
        case "${enableval}" in
            yes) use_ecap=yes ;;
            no) use_ecap=no ;;
            *) AC_MSG_ERROR(bad value ${enableval} for --enable-ecap) ;;
        esac
        AC_MSG_RESULT([$use_ecap, explicitly])
    ],
    [
        use_ecap=no;
        AC_MSG_RESULT([$use_ecap, implicitly])
    ]
)

dnl Perform configuration consistency checks for eCAP
if test $use_ecap = yes;
then
    dnl eCAP support requires loadable modules, which are enabled by default
    if test "$use_loadable_modules" != "yes"
    then
        AC_MSG_ERROR([
            eCAP support requires loadable modules. Please do not use
            --disable-loadable-modules with --enable-ecap.]);
    fi
fi

AM_CONDITIONAL(USE_ECAP, test $use_ecap = yes)
if test $use_ecap = yes;
then
    AC_DEFINE(USE_ECAP,1,[Enable eCAP support])
    ECAP_LIBS="eCAP/libeCAP.la"
    use_adaptation=yes
else
    AC_DEFINE(USE_ECAP,0,[Disable eCAP support])
    ECAP_LIBS=""
fi
AC_SUBST(ECAP_LIBS)


dnl enable adaptation if requested by specific adaptation mechanisms
AM_CONDITIONAL(USE_ADAPTATION, test $use_adaptation = yes)
if test $use_adaptation = yes
then
    AC_DEFINE(USE_ADAPTATION,1,[common adaptation support])
    ADAPTATION_LIBS="adaptation/libadaptation.la"
else
    AC_DEFINE(USE_ADAPTATION,0,[common adaptation support])
    ADAPTATION_LIBS=""
fi
AC_SUBST(ADAPTATION_LIBS)


dnl This is a developer only option. Developers know how to set defines
dnl
dnl AC_ARG_ENABLE(mem-gen-trace,
dnl [  --enable-mem-gen-trace  Do trace of memory stuff],
dnl [ if test "$enableval" = "yes" ; then
dnl     echo "Memory trace (to file) enabled"
dnl     AC_DEFINE(MEM_GEN_TRACE,1,[Define for log file trace of mem alloc/free])
dnl   fi    
dnl ])     

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,1,[If you want to log User-Agent request header values, define this.
    By default, they are written to useragent.log in the Squid log
    directory.])
  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,1,[If you want to log Referer request header values, define this.
    By default, they are written to referer.log in the Squid log
    directory.])
  fi
])

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

USE_WCCPv2=1
AC_ARG_ENABLE(wccpv2,
[  --disable-wccpv2        Disable Web Cache Coordination V2 Protocol],
[ if test "$enableval" = "no" ; then
    echo "Web Cache Coordination V2 Protocol disabled"
    USE_WCCPv2=0
  fi
])
if test $USE_WCCPv2 = 1; then
    AC_DEFINE(USE_WCCPv2, 1, [Define to enable WCCP V2])
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,1,[A dangerous feature which causes Squid to kill its parent process
    (presumably the RunCache script) upon receipt of SIGTERM or SIGINT.
    Use with caution.])
  fi
])

USE_SNMP=true
AC_ARG_ENABLE(snmp,
[  --disable-snmp          Disable SNMP monitoring support],
[ if test "$enableval" = "no" ; then
    echo "SNMP monitoring disabled"
    USE_SNMP=
  fi
])
if test x"$USE_SNMP" = xtrue; then
    AC_DEFINE(SQUID_SNMP,1,[Define to enable SNMP monitoring of Squid])
    SNMPLIB='../snmplib/libsnmp.a'
    makesnmplib=snmplib
fi
AM_CONDITIONAL(USE_SNMP, [test x$USE_SNMP = xtrue])
AC_SUBST(SNMPLIB)
AC_SUBST(makesnmplib)

AC_ARG_ENABLE(cachemgr-hostname,
[  --enable-cachemgr-hostname[=hostname]
                          Make cachemgr.cgi default to this host],
[  case $enableval in
   yes)
       AC_DEFINE(CACHEMGR_HOSTNAME,[getfullhostname()],
       [If you are upset that the cachemgr.cgi form comes up with the hostname field blank, then define this to getfullhostname()])
       echo "Cachemgr default hostname == host where cachemgr runs"
       ;;
   no)
       : # Nothing to do..
       ;;
   *)
       AC_DEFINE_UNQUOTED(CACHEMGR_HOSTNAME,"${enableval}")
       echo "Cachemgr default hostname set to ${enableval}"
       ;;
   esac
])

AM_CONDITIONAL(ENABLE_ARP_ACL, false)
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
	*-linux-*)
	    ;;
	*-solaris*)
	    ;;
	*-freebsd*)
	    ;;
	*-openbsd*)
	    ;;
	*-netbsd*)
	    ;;
	*-cygwin*)
        LIBS="$LIBS -liphlpapi"
	    ;;
	*-mingw*)
        LIBS="$LIBS -liphlpapi"
	    ;;
	*)
	    echo "WARNING: ARP ACL support probably won't work on $host."
	    sleep 10
	    ;;
     esac
     AC_DEFINE(USE_ARP_ACL,1,[Define this to include code which lets you specify access control elements based on ethernet hardware addresses.  This code uses functions found in 4.4 BSD derviations (e.g. FreeBSD, ?).])
     AM_CONDITIONAL(ENABLE_ARP_ACL, true)
   fi
])

USE_HTCP=true
AM_CONDITIONAL(ENABLE_HTCP, false)
AC_ARG_ENABLE(htcp,
[  --disable-htcp          Disable HTCP protocol support],
[ if test "$enableval" = "no" ; then
    echo "HTCP support disabled"
  fi
])
if test x$USE_HTCP = xtrue; then
    AC_DEFINE(USE_HTCP,1, [Define this to include code for the Hypertext Cache Protocol (HTCP)])
fi
AM_CONDITIONAL(ENABLE_HTCP, [test x$USE_HTCP = xtrue])

dnl SSL is not enabled by default.
AM_CONDITIONAL(ENABLE_SSL, false)

dnl Default is to use OpenSSL when available
AC_ARG_ENABLE(ssl,
[  --enable-ssl            Enable ssl gatewaying support using OpenSSL],
[ if test "$enableval" != "no"; then
    echo "SSL gatewaying using OpenSSL enabled"
    AC_DEFINE(USE_SSL,1,[Define this to include code for SSL encryption.])
    AM_CONDITIONAL(ENABLE_SSL, true)
    case "$host_os" in
    mingw|mingw32)
        dnl Native Windows port of OpenSSL needs -lgdi32
        SSLLIB='-lssleay32 -leay32 -lgdi32'
        ;;
    *)
        SSLLIB='-lssl -lcrypto'
	;;
    esac
    USE_OPENSSL=1
  fi
])

dnl User may specify OpenSSL is needed from a non-standard location
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 "$with_openssl" in
  yes)
    USE_OPENSSL=1
    ;;
  no)
    USE_OPENSSL=
    ;;
  *)
    SSLLIBDIR="$with_openssl/lib"
    CPPFLAGS="-I$with_openssl/include $CPPFLAGS"
    USE_OPENSSL=1
  esac
])
if test -n "$USE_OPENSSL"; then
  echo "Using OpenSSL MD5 implementation"
  AC_DEFINE(USE_OPENSSL,1,[Define this to make use of the OpenSSL libraries for MD5 calculation rather than Squid's own MD5 implementation or if building with SSL encryption (USE_SSL)])
  if test -z "$SSLLIB"; then
    SSLLIB="-lcrypto" # for MD5 routines
  fi
  dnl This is a workaround for RedHat 9 brain damage..
  if test -d /usr/kerberos/include && test -z "$SSLLIBDIR" && test -f /usr/include/openssl/kssl.h; then
    echo "OpenSSL depends on Kerberos"
    SSLLIBDIR="/usr/kerberos/lib"
    CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  fi
fi
if test -n "$SSLLIBDIR"; then
  SSLLIB="-L$SSLLIBDIR $SSLLIB"
fi
AC_SUBST(SSLLIB)


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,1,[Enable Forw/Via database])
  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,1,[Use Cache Digests for locating objects in neighbor caches.  This code is still semi-experimental.])
  fi
])

dnl Size of COSS memory buffer
AC_ARG_WITH(coss-membuf-size,
[  --with-coss-membuf-size COSS membuf size (default 1048576 bytes) ],
[  if test -n "$withval" -a "x$withval" != "xno" ; then
      echo "Setting COSS membuf size to $with_coss_membuf_size bytes"
      AC_DEFINE_UNQUOTED(COSS_MEMBUF_SZ, $with_coss_membuf_size,[Define if you want to set the COSS membuf size])
   fi
])

dnl check for netio plugin stuff

dnl Enable poll()
disable_poll=
AC_ARG_ENABLE(poll,
[  --disable-poll          Disable poll() support. ],

[
  case "$enableval" in
  yes)
    echo "Forcing poll() to be enabled"
    SELECT_TYPE="poll"
    ;;
  no)
    echo "Forcing poll() to be disabled"
    disable_poll=true
    ;;
  esac
])

dnl Enable select()
disable_select=
AC_ARG_ENABLE(select,
[  --disable-select        Disable select() support. ],

[
  case "$enableval" in
  yes)
    echo "Forcing select() to be enabled"
    SELECT_TYPE="select"
    ;;
  no)
    echo "Forcing select() to be disabled"
    disable_select=true
    ;;
  esac
])

dnl Enable kqueue()
dnl kqueue support is still experiemntal and unstable. Not enabled by default.
disable_kqueue=true
AC_ARG_ENABLE(kqueue,
[  --enable-kqueue         Enable kqueue() support (experimental).],

[
  case "$enableval" in
  yes)
    echo "Forcing kqueue() to be enabled"
    SELECT_TYPE="kqueue"
    ;;
  no)
    echo "Forcing kqueue() to be disabled"
    disable_kqueue=true
  ;;
esac
])

dnl Enable epoll()
disable_epoll=
AC_ARG_ENABLE(epoll,
[  --disable-epoll         Disable Linux epoll() support.],

[
  case "$enableval" in
  yes)
    echo "Forcing epoll() to be enabled"
    SELECT_TYPE="epoll"
    ;;
  no)
    echo "Forcing epoll() to be disabled"
    disable_epoll=true
  ;;
esac
])


dnl Disable HTTP violations
http_violations=1
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"
    http_violations=0
  fi
])
if test $http_violations = 1; then
    AC_DEFINE(HTTP_VIOLATIONS, 1,[By default (for now anyway) Squid includes options which allows the cache administrator to violate the HTTP protocol specification in terms of cache behaviour.  Setting this to '0' will disable such code.])
else
    AC_DEFINE(HTTP_VIOLATIONS, 0)
fi

dnl Enable IPFW Transparent Proxy
AC_ARG_ENABLE(ipfw-transparent,
[  --enable-ipfw-transparent
                          Enable Transparent Proxy support for systems
                          using FreeBSD IPFW style redirection.],
[ if test "$enableval" = "yes" ; then
	echo "IPFW Transparent Proxy enabled"
	AC_DEFINE(IPFW_TRANSPARENT,1,[Enable support for Transparent Proxy on systems using FreeBSD IPFW address redirection.])
	IPFW_TRANSPARENT="yes"
  else
	AC_DEFINE(IPFW_TRANSPARENT,0,[Enable support for Transparent Proxy on systems using FreeBSD IPFW address redirection.])
  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,1,[Enable support for Transparent Proxy on systems using IP-Filter address redirection. This provides "masquerading" support for non Linux system.])
	IPF_TRANSPARENT="yes"
  else
	AC_DEFINE(IPF_TRANSPARENT,0,[Enable support for Transparent Proxy on systems using IP-Filter address redirection. This provides "masquerading" support for non Linux system.])
  fi
])

dnl Enable PF Transparent Proxy
AC_ARG_ENABLE(pf-transparent,
[  --enable-pf-transparent
                          Enable Transparent Proxy support for systems
                          using PF network address redirection.],
[ if test "$enableval" = "yes" ; then
	echo "PF Transparent Proxy enabled"
	AC_DEFINE(PF_TRANSPARENT,1,[Enable support for Transparent Proxy on systems using PF address redirection. This provides "masquerading" support for OpenBSD.])
	PF_TRANSPARENT="yes"
  else
	AC_DEFINE(PF_TRANSPARENT,0,[Enable support for Transparent Proxy on systems using PF address redirection. This provides "masquerading" support for OpenBSD.])
  fi
])

dnl Enable Linux Netfilter Transparent Proxy
AC_ARG_ENABLE(linux-netfilter,
[  --enable-linux-netfilter
                          Enable Transparent Proxy support for Linux (Netfilter) systems.],
[ if test "$enableval" = "yes" ; then
	echo "Linux (Netfilter) Transparent Proxy enabled"
	AC_DEFINE(LINUX_NETFILTER,1,[Enable support for Transparent Proxy on Linux (Netfilter) systems])
	LINUX_NETFILTER="yes"
  else
	AC_DEFINE(LINUX_NETFILTER,0,[Enable support for Transparent Proxy on Linux (Netfilter) systems])
  fi
])

dnl Enable Large file support
buildmodel=""
needlargefiles=

AC_ARG_WITH(large-files,
[  --with-large-files      Enable support for large files (logs etc).],
[ if test "x$withval" = "xyes"; then
	needlargefiles=1
  fi
])

dnl UNIX Build environment
AC_ARG_WITH(build-environment,
[  --with-build-environment=model
                          The build environment to use. Normally one of
                          POSIX_V6_ILP32_OFF32   32 bits
                          POSIX_V6_ILP32_OFFBIG  32 bits with large file support
                          POSIX_V6_LP64_OFF64    64 bits
                          POSIX_V6_LPBIG_OFFBIG  large pointers and files
                          XBS5_ILP32_OFF32       32 bits (legacy)
                          XBS5_ILP32_OFFBIG      32 bits with large file support (legacy)
                          XBS5_LP64_OFF64        64 bits (legacy)
                          XBS5_LPBIG_OFFBIG      large pointers and files (legacy)
                          default                The default for your OS],
[ case "$withval" in
  yes|no)
	echo "--with-build-environment expects a build environment string as used by getconf"
	exit 1
	;;
  *)
	buildmodel="$withval"
	;;
  esac
])

if test $needlargefiles && test -z "$buildmodel"; then
	for model in POSIX_V6_LPBIG_OFFBIG XBS5_LPBIG_OFFBIG POSIX_V6_LP64_OFF64 XBS5_LP64_OFF64 POSIX_V6_ILP32_OFFBIG XBS5_ILP32_OFFBIG; do
		if test "`getconf _$model 2>/dev/null || true`" = 1 || test "`getconf $model 2>/dev/null || true`" ; then
			buildmodel=$model
			break
		fi
	done
	if test -z "$buildmodel"; then
		echo "WARNING: No suitable build environment found for large files. Trying to use _FILE_OFFSET_BITS=64"
		sleep 1
	fi
fi
case "$buildmodel" in
default|"")
	if test "$needlargefiles"; then
		echo "Enabling -D_FILE_OFFSET_BITS=64"
		CFLAGS="-D_FILE_OFFSET_BITS=64 $CFLAGS"
		CXXFLAGS="-D_FILE_OFFSET_BITS=64 $CXXFLAGS"
	fi
	;;
*)
	echo "Using $buildmodel build environment"
	if test "`getconf _$buildmodel 2>/dev/null || true`" = 1 || test "`getconf $buildmodel 2>/dev/null || true`" ; then
	    : # All fine
	else
	    AC_MSG_ERROR(Build environment $buildmodel not known to getconf.)
	fi
	CFLAGS="`getconf ${buildmodel}_CFLAGS` $CFLAGS"
	CXXFLAGS="`getconf ${buildmodel}_CFLAGS` $CXXFLAGS"
	LIBS="`getconf ${buildmodel}_LIBS` $LIBS"
	LDFLAGS="`getconf ${buildmodel}_LDFLAGS` $LDFLAGS"
	case "$host" in
dnl
dnl On Solaris getconf returns for CFLAGS -xarch=generic64, -Xa and -Usun options, and
dnl for LDFLAGS -xarch=generic64, but:
dnl   "-Xa" is supported only by Sun cc, so we need to remove it when using gcc
dnl   For gcc "-xarch=generic64" must be replaced with "-m64"
dnl   The 'sun' define is needed by ipfilter includes, so we must remove "-Usun"
	    *-solaris*)
    		if test "$GCC" = "yes"; then
		    echo "Removing -Xa for gcc on $host"
		    CFLAGS="`echo $CFLAGS | sed -e 's/-Xa//'`"
		    CXXFLAGS="`echo $CXXFLAGS | sed -e 's/-Xa//'`"
		    echo "Replacing -xarch=generic64 with -m64 for gcc on $host"
		    CFLAGS="`echo $CFLAGS | sed -e 's/-xarch=generic64/-m64/'`"
		    LDFLAGS="`echo $LDFLAGS | sed -e 's/-xarch=generic64//'`"
		fi
		echo "Removing -Usun on $host"
		CFLAGS="`echo $CFLAGS | sed -e 's/-Usun//'`"
		CXXFLAGS="`echo $CXXFLAGS | sed -e 's/-Usun//'`"
		;;
dnl		
dnl On Irix 6.x getconf returns options valid only for the SGI MipsPRO compiler,
dnl so we must adjust something to avoid gcc errors.
dnl On Irix 6.x 32/64 bit we must replace "-n32" with "-mabi=n32" in CFLAGS and
dnl remove "-n32" from LDFLAGS
dnl On Irix 6.x 64 bit we must replace "-64" with "-mabi=64" in CFLAGS and remove
dnl "-64" from LDFLAGS
	    *-sgi-irix6.*)
    		if test "$GCC" = "yes"; then
		    CFLAGS="`echo $CFLAGS | sed -e 's/-n32/-mabi=n32/'`"
		    CXXFLAGS="`echo $CXXFLAGS | sed -e 's/-n32/-mabi=n32/'`"
		    LDFLAGS="`echo $LDFLAGS | sed -e 's/-n32//'`"
		    CFLAGS="`echo $CFLAGS | sed -e 's/-64/-mabi=64/'`"
		    CXXFLAGS="`echo $CXXFLAGS | sed -e 's/-64/-mabi=64/'`"
		    LDFLAGS="`echo $LDFLAGS | sed -e 's/-64//'`"
		fi
		;;
	    *)
	        ;;
	esac
	;;
esac

dnl Enable Linux transparent proxy support for obsolete TPROXY
AC_ARG_ENABLE(linux-tproxy,
[  --enable-linux-tproxy
			  Enable real Transparent Proxy support for Netfilter TPROXY (version 2).],
[ if test "$enableval" = "yes" ; then
	echo "Linux Netfilter/TPROXY v2 enabled"
	AC_DEFINE(LINUX_TPROXY2, 1, [Enable real Transparent Proxy support for Netfilter TPROXY v2.])
	LINUX_TPROXY2="yes"
        if test -z "$LINUX_NETFILTER"; then
	    echo "Linux-Netfilter Transparent Proxy automatically enabled"
	    LINUX_NETFILTER="yes"
	fi
  else
	AC_DEFINE(LINUX_TPROXY2, 0, [Enable real Transparent Proxy support for Netfilter TPROXY v2.])
  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,1,[Enable code for assisting in finding memory leaks.  Hacker stuff only.])
	USE_LEAKFINDER="yes"
	AM_CONDITIONAL(MAKE_LEAKFINDER, true)
  fi
])

follow_xff=1
AC_ARG_ENABLE(follow-x-forwarded-for,
[  --enable-follow-x-forwarded-for
                          Enable support for following the X-Forwarded-For
                          HTTP header to try to find the IP address of the
                          original or indirect client when a request has
                          been forwarded through other proxies.],
[ if test "$enableval" = "yes" ; then
    echo "follow X-Forwarded-For enabled"
    follow_xff=1
  fi
])
if test $follow_xff = 1; then
    AC_DEFINE(FOLLOW_X_FORWARDED_FOR, 1, [Enable following X-Forwarded-For headers])
else
    AC_DEFINE(FOLLOW_X_FORWARDED_FOR, 0)
fi

use_ident=1
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"
    use_ident=0
  fi
])
if test $use_ident = 1; then
    AC_DEFINE(USE_IDENT, 1,[Compile in support for Ident (RFC 931) lookups?  Enabled by default.])
    AM_CONDITIONAL(ENABLE_IDENT, true)
else
    AC_DEFINE(USE_IDENT, 0)
    AM_CONDITIONAL(ENABLE_IDENT, false)
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,1,[Use dnsserver processes instead of the internal DNS protocol support])
    AM_CONDITIONAL(USE_DNSSERVER, true)
fi

dnl Select Default hosts file location
AC_ARG_ENABLE(default-hostsfile,
[  --enable-default-hostsfile=path
                          Select default location for hosts file.
                          See hosts_file directive in squid.conf for details],
[
    if test "$enableval" != "none" ; then
    	if test -f $enableval; then
	    OPT_DEFAULT_HOSTS=$enableval
    	else
	    echo "Warning Unable to find $enableval"
	    sleep 5
	fi
    else
	OPT_DEFAULT_HOSTS="none"    
    fi
    echo "Default hosts file set to: $enableval"
],[OPT_DEFAULT_HOSTS="/etc/hosts"])
AC_SUBST(OPT_DEFAULT_HOSTS)

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 dir in $srcdir/src/auth/*; do
	    module="`basename $dir`"
            if test -d "$dir" && test "$module" != CVS; then
                AUTH_MODULES="$AUTH_MODULES $module"
            fi
        done
        ;;
  no)
        ;;
  *)
	AUTH_MODULES="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
  	;;
  esac
],
[ if test -z "$AUTH_MODULES"; then
    AUTH_MODULES="ntlm basic digest negotiate"
  fi
])
if test -n "$AUTH_MODULES"; then
    for module in $AUTH_MODULES; do
	if test -d $srcdir/src/auth/$module; then
	    :
	else
	    AC_MSG_ERROR(Auth scheme $module does not exist)
	fi
	eval AUTH_MODULE_${module}=yes
    done
    echo "Auth scheme modules built: $AUTH_MODULES"
    AUTH_OBJS="auth/lib`echo $AUTH_MODULES|sed -e 's% %.a auth/lib%g'`.a"
    AUTH_LIBS="`echo $AUTH_OBJS|sed -e 's%auth/%%g'`"
else
    echo "Auth scheme modules built: None"
fi
AUTH_LINKOBJS=
for module in $AUTH_MODULES; do
  AUTH_LINKOBJS="$AUTH_LINKOBJS auth/${module}/${module}Scheme.o"
done
AC_SUBST(AUTH_MODULES)
AC_SUBST(AUTH_LIBS)
AC_SUBST(AUTH_LINKOBJS)
AC_SUBST(AUTH_OBJS)

dnl Select basic auth scheme helpers to build
if test -n "$AUTH_MODULE_basic"; then
	BASIC_AUTH_HELPERS="all"
fi
AC_ARG_ENABLE(basic-auth-helpers,
[  --enable-basic-auth-helpers=\"list of helpers\"
                          This option selects which basic scheme proxy_auth
                          helpers to build and install as part of the normal 
                          build process. For a list of available
                          helpers see the helpers/basic_auth directory.],
[ case "$enableval" in
  yes)
	BASIC_AUTH_HELPERS="all"
	;;
  no)
	BASIC_AUTH_HELPERS=""
	;;
  *)
	if test -z "$AUTH_MODULE_basic"; then
		echo "WARNING: Basic auth helpers selected without the basic scheme enabled"
		sleep 15
	fi
	BASIC_AUTH_HELPERS="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
	;;
  esac
])
if test "$BASIC_AUTH_HELPERS" = "all" ; then
	BASIC_AUTH_HELPERS=""
	for dir in $srcdir/helpers/basic_auth/*; do
	    helper="`basename $dir`"
	    if test -f $dir/config.test && sh $dir/config.test "$@"; then
		BASIC_AUTH_HELPERS="$BASIC_AUTH_HELPERS $helper"
	    fi
	done
fi
if test -n "$BASIC_AUTH_HELPERS"; then
    for helper in $BASIC_AUTH_HELPERS; do
	if test -d $srcdir/helpers/basic_auth/$helper; then
	    case $helper in
	    SASL)
		    require_sasl=yes
		    ;;
	    esac
	else
	    AC_MSG_ERROR(Basic auth helper $helper does not exist)
	fi
    done
    echo "Basic auth helpers built: $BASIC_AUTH_HELPERS"
fi
AC_SUBST(BASIC_AUTH_HELPERS)

dnl Select ntlm auth helpers to build
if test -n "$AUTH_MODULE_ntlm"; then
	NTLM_AUTH_HELPERS="all"
fi
AC_ARG_ENABLE(ntlm-auth-helpers,
[  --enable-ntlm-auth-helpers=\"list of helpers\"
                          This option selects which proxy_auth ntlm helpers
                          to build and install as part of the normal build 
                          process. For a list of available helpers see
                          the helpers/ntlm_auth directory.],
[ case "$enableval" in
  yes) 
	NTLM_AUTH_HELPERS="all"
	;;
  no)
	NTLM_AUTH_HELPERS=""
	;;
  *)
	NTLM_AUTH_HELPERS="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
	;;
  esac
])
if test "$NTLM_AUTH_HELPERS" = "all" ; then
	NTLM_AUTH_HELPERS=""
	for dir in $srcdir/helpers/ntlm_auth/*; do
	    helper="`basename $dir`"
	    if test -f $dir/config.test && sh $dir/config.test "$@"; then
		NTLM_AUTH_HELPERS="$NTLM_AUTH_HELPERS $helper"
	    fi
	done
fi
if test -n "$NTLM_AUTH_HELPERS"; then
    for helper in $NTLM_AUTH_HELPERS; do
	if test -d $srcdir/helpers/ntlm_auth/$helper; then
	    :
	else
	    AC_MSG_ERROR(NTLM Auth helper $helper does not exist)
	fi
    done
    echo "NTLM auth helpers built: $NTLM_AUTH_HELPERS"
fi
AC_SUBST(NTLM_AUTH_HELPERS)

dnl Select negotiate auth helpers to build
if test -n "$AUTH_MODULE_negotiate"; then
	NEGOTIATE_AUTH_HELPERS="all"
fi
AC_ARG_ENABLE(negotiate-auth-helpers,
[  --enable-negotiate-auth-helpers=\"list of helpers\"
                          This option selects which proxy_auth negotiate helpers
                          to build and install as part of the normal build 
                          process. For a list of available helpers see
                          the helpers/negotiate_auth directory.],
[ case "$enableval" in
  yes) 
	NEGOTIATE_AUTH_HELPERS="all"
	;;
  no)
	NEGOTIATE_AUTH_HELPERS=""
	;;
  *)
	NEGOTIATE_AUTH_HELPERS="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
	;;
  esac
])
if test "$NEGOTIATE_AUTH_HELPERS" = "all" ; then
	NEGOTIATE_AUTH_HELPERS=""
	for dir in $srcdir/helpers/negotiate_auth/*; do
	    helper="`basename $dir`"
	    if test -f $dir/config.test && sh $dir/config.test "$@";  then
		NEGOTIATE_AUTH_HELPERS="$NEGOTIATE_AUTH_HELPERS $helper"
	    fi
	done
fi
if test -n "$NEGOTIATE_AUTH_HELPERS"; then
    for helper in $NEGOTIATE_AUTH_HELPERS; do
	if test -d $srcdir/helpers/negotiate_auth/$helper; then
	    :
	else
	    AC_MSG_ERROR(Negotiate Auth helper $helper does not exist)
	fi
    done
    echo "Negotiate auth helpers built: $NEGOTIATE_AUTH_HELPERS"
fi
AC_SUBST(NEGOTIATE_AUTH_HELPERS)

dnl Select digest auth scheme helpers to build
if test -n "$AUTH_MODULE_digest"; then
	DIGEST_AUTH_HELPERS=all
fi
AC_ARG_ENABLE(digest-auth-helpers,
[  --enable-digest-auth-helpers=\"list of helpers\"
                          This option selects which digest scheme authentication
                          helpers to build and install as part of the normal build
                          process. For a list of available helpers see the
                          helpers/digest_auth directory.],
[ case "$enableval" in
  yes)
	DIGEST_AUTH_HELPERS="all"
	;;
  no)
	DIGEST_AUTH_HELPERS=""
	;;
  *)
	DIGEST_AUTH_HELPERS="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
	;;
  esac
])
if test "$DIGEST_AUTH_HELPERS" = "all" ; then
	DIGEST_AUTH_HELPERS=""
	for dir in $srcdir/helpers/digest_auth/*; do
	    helper="`basename $dir`"
	    if test -f $dir/config.test && sh $dir/config.test "$@"; then
		DIGEST_AUTH_HELPERS="$DIGEST_AUTH_HELPERS $helper"
	    fi
	done
fi
if test -n "$DIGEST_AUTH_HELPERS"; then
    for helper in $DIGEST_AUTH_HELPERS; do
	if test -f $srcdir/helpers/digest_auth/$helper/Makefile.in; then
		:
	else
		AC_MSG_ERROR(digest auth helper $helper does not exist)
	fi
    done
    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,1,[Define if NTLM is allowed to fail gracefully when a helper has problems. WARNING: This has security implications. DO NOT enable unless you KNOW you need it.])
  fi
])

dnl Select external_acl helpers to build
EXTERNAL_ACL_HELPERS=all
AC_ARG_ENABLE(external-acl-helpers,
[  --enable-external-acl-helpers=\"list of helpers\"
                          This option selects which external_acl helpers to
                          build and install as part of the normal build
                          process. For a list of available helpers see the
                          helpers/external_acl directory.],
[ case "$enableval" in
  yes)
	EXTERNAL_ACL_HELPERS=all
	;;
  no)
	EXTERNAL_ACL_HELPERS=""
	;;
  *)
 	EXTERNAL_ACL_HELPERS="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
	;;
  esac
])
if test "$EXTERNAL_ACL_HELPERS" = "all" ; then
	EXTERNAL_ACL_HELPERS=""
	for dir in $srcdir/helpers/external_acl/*; do
	    helper="`basename $dir`"
	    if test -f $dir/config.test && sh $dir/config.test "$@"; then
		EXTERNAL_ACL_HELPERS="$EXTERNAL_ACL_HELPERS $helper"
	    fi
	done
fi
if test -n "$EXTERNAL_ACL_HELPERS"; then
    for helper in $EXTERNAL_ACL_HELPERS; do
	if test -f $srcdir/helpers/external_acl/$helper/Makefile.in; then
		:
	else
		AC_MSG_ERROR(external acl helper $helper does not exist)
	fi
    done
    echo "External acl helpers built: $EXTERNAL_ACL_HELPERS"
fi
AC_SUBST(EXTERNAL_ACL_HELPERS)

AC_ARG_WITH(valgrind-debug,
[  --with-valgrind-debug  Include debug instrumentation for use with valgrind],
[ case $withval in
  yes)
	valgrind=1
	;;
  no)
	valgrind=
	;;
  *)
	CPPFLAGS="$CPPFLAGS -I${enableval}/include"
	valgrind=1
	;;
  esac
  if test $valgrind; then
	AC_DEFINE(WITH_VALGRIND, 1, [Valgrind memory debugger support])
	echo "Valgrind debug support enabled"
  fi
])

dnl Disable "memPools" code
AC_ARG_ENABLE(mempools,
[  --disable-mempools      Disable memPools. Note that this option now simply sets the
			  default behaviour. Specific classes can override this at runtime, and
			  only lib/MemPool.c needs to be altered to change the squid-wide 
			  default for all classes.],
[ if test "$enableval" = "no" ; then
    echo "memPools disabled"
    AC_DEFINE(DISABLE_POOLS, 1, [Define if you have problems with memPools and want to disable Pools])
  else
    AC_DEFINE(DISABLE_POOLS, 0, [Define if you have problems with memPools and want to disable Pools.])
  fi
],
[ AC_DEFINE(DISABLE_POOLS, 0, [Define if you have problems with memPools and want to disable Pools.])
])

dnl Enable WIN32 Service compile mode
AC_ARG_ENABLE(win32-service,
[  --enable-win32-service  Compile Squid as a WIN32 Service
                          Works only on Windows NT and Windows 2000 Platforms.],
[ if test "$enableval" = "yes" ; then
    echo "Enabling WIN32 run service mode"
    AC_DEFINE(USE_WIN32_SERVICE,1,[Define Windows NT & Windows 2000 run service mode])
  fi
])


dnl Check for Cyrus SASL
if test "$require_sasl" = "yes"; then
	AC_CHECK_HEADERS(sasl/sasl.h sasl.h)
	if test "$ac_cv_header_sasl_sasl_h" = "yes"; then
		echo "using SASL2"
		LIBSASL="-lsasl2"
	else
		if test "$ac_cv_header_sasl_h" = "yes"; then
			echo "using SASL"
			LIBSASL="-lsasl"
		else
			AC_MSG_ERROR(Neither SASL nor SASL2 found)
		fi
	fi
	AC_SUBST(LIBSASL)
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,1,[Define this if unlinkd is required (strongly recommended for ufs storage type)])
    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,[Print stacktraces on fatal errors])
  fi
])

AM_CONDITIONAL(ENABLE_XPROF_STATS, false)
dnl Enable USE_XPROF_STATS
AC_ARG_ENABLE(cpu-profiling,
[  --enable-cpu-profiling
                          This option allows you to see which internal functions
                          in Squid are consuming how much CPU. Compiles in probes
                          that measure time spent in probed functions. Needs
                          source modifications to add new probes. This is meant
                          for developers to assist in performance optimisations
                          of Squid internal functions.
                          If you are not developer and not interested in the stats
                          you shouldn't enable this, as overhead added, although
                          small, is still overhead. See lib/Profiler.c for more.
                          ],
[ if test "$enableval" = "yes" ; then
    echo "Enabling cpu-profiling"
    AC_DEFINE(USE_XPROF_STATS, 1,[Define to enable CPU profiling within Squid])
    AM_CONDITIONAL(ENABLE_XPROF_STATS, true)
  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, [Enable support for the X-Accelerator-Vary HTTP header])
  fi
])

dnl Enable IPv6 support
AC_MSG_CHECKING([whether to enable IPv6])
use_ipng=no
AC_ARG_ENABLE(ipv6,
[  --enable-ipv6           Enable ipv6 support],
[ AC_MSG_RESULT(yes)
  AC_CACHE_CHECK([if PF_INET6 is available], $enableval,
    AC_TRY_RUN(
      [ /* PF_INET6 available check */
#       include <sys/types.h>
#       include <sys/socket.h>
        void main() {
          if (socket(PF_INET6, SOCK_STREAM, 0) < 0)
            exit(1);
          else
            exit(0);
        }
      ],
      [ AC_DEFINE(USE_IPV6,1,[Enable support for IPv6 ])
        AC_MSG_RESULT(yes)
        use_ipng=yes
      ],
      [ AC_DEFINE(USE_IPV6,0,[0 == Disable support for IPv6])
        AC_DEFINE(IPV6_SPECIAL_SPLITSTACK,0,[Enable support for IPv6 on split-stack implementations])
        AC_DEFINE(IPV6_SPECIAL_LOCALHOST,0,[Convert IPv4-localhost requests to IPv6. Default: Keep seperate.])
        AC_DEFINE(IPV6_SPECIAL_V4MAPPED,0,[Enable v4-mapping through v6 sockets])
        AC_MSG_RESULT(no)
      ])
   )
],
[ AC_DEFINE(USE_IPV6,0,[Disable support for IPv6])
  AC_DEFINE(IPV6_SPECIAL_SPLITSTACK,0,[Enable support for IPv6 on split-stack implementations])
  AC_DEFINE(IPV6_SPECIAL_LOCALHOST,0,[Convert IPv4-localhost requests to IPv6. Default: Keep seperate.])
  AC_DEFINE(IPV6_SPECIAL_V4MAPPED,0,[Enable v4-mapping through v6 sockets])
  AC_MSG_RESULT(no)
])

if test "$use_ipng" = "yes"; then

dnl Check for Windows XP option
AC_MSG_CHECKING([for IPv6 split-stack requirement])
AC_ARG_WITH(ipv6-split-stack,
  [  --with-ipv6-split-stack  Require IPv6 split-stack support. Requires IPv6 Support.],
  [AC_DEFINE(IPV6_SPECIAL_SPLITSTACK, 1, [Enable support for IPv6 on split-stack implementations]) AC_MSG_RESULT(yes)],
  [AC_DEFINE(IPV6_SPECIAL_SPLITSTACK, 0, [Enable support for IPv6 on split-stack implementations]) AC_MSG_RESULT(no)]
)

dnl Check for IPv6 Windows Vista option
dnl Also useful for other OS
AC_MSG_CHECKING([for IPv6 v4-mapping requirement])
AC_ARG_WITH(ipv4-mapped,
  [  --with-ipv4-mapped  Hybrid-Stack OS require Squid to do any v4-mapping. Requires IPv6 Support.],
  [AC_DEFINE(IPV6_SPECIAL_V4MAPPED, 1, [Enable v4-mapping through v6 sockets]) AC_MSG_RESULT(yes)],
  [AC_DEFINE(IPV6_SPECIAL_V4MAPPED, 0, [Enable v4-mapping through v6 sockets]) AC_MSG_RESULT(no)]
)

dnl Check for IPv6-pure option
AC_MSG_CHECKING([for IPv6-Localhost requirement])
AC_ARG_WITH(localhost-ipv6,
  [  --with-localhost-ipv6    Prefer IPv6 localhost address over IPv4. Requires IPv6 Support.
                           Treats 127.0.0.1 and ::1 as identical and converts all inputs of to ::1
                           This depends on Dual-Stack support in the OS and all applications
                           squid contacts via localhost being IPv6 enabled.
                           Default: OFF. Treats these two IP as different, squid.conf must
                           define both 127.0.0.1 and ::1 for the localhost ACL, etc. ],
  [AC_DEFINE(IPV6_SPECIAL_LOCALHOST, 1, [Convert IPv4-localhost requests to IPv6. Default: keep seperate.]) AC_MSG_RESULT(yes)],
  [AC_DEFINE(IPV6_SPECIAL_LOCALHOST, 0, [Convert IPv4-localhost requests to IPv6. Default: Keep seperate.]) AC_MSG_RESULT(no)]
)

# end IPv6-only options
fi

AC_ARG_ENABLE(zph-qos,
[  --enable-zph-qos        Enable ZPH QOS support],
[ if test "$enableval" = "yes" ; then
    echo "ZPH QOS enabled"
    AC_DEFINE(USE_ZPH_QOS,1,
    [ Define this to use Squid's ZPH (Zero Penalty Hit) QOS features.
      When enabled, Squid will alter TOS field of HIT responses for better QOS on intermediate routing/shaping devices.])
  fi
])

dnl Optional CNAME-Recursion by Internal DNS engine
AC_MSG_CHECKING([whether DNS CNAME recursion wanted])
AC_ARG_WITH(dns-cname,
  [  --with-dns-cname         Enable CNAME-Recursion in Internal DNS stub.],
  [AC_DEFINE(DNS_CNAME, 1, [ 1 == Enable expermental CNAME recursion inside Squid DNS resolver stub]) AC_MSG_RESULT(yes)],
  [AC_DEFINE(DNS_CNAME, 0, [ 0 == Disable expermental CNAME recursion inside Squid DNS resolver stub]) AC_MSG_RESULT(no)]
)

dnl Check whether this OS defines ss_len as a member of sockaddr_storage
AC_CACHE_CHECK([for ss_len field in struct sockaddr_storage],
		ac_cv_have_ss_len_in_struct_ss, [
	AC_TRY_COMPILE([
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
		],
		[ struct sockaddr_storage s; s.ss_len = 1; ],
		[ ac_cv_have_ss_len_in_struct_ss="yes" ],
		[ ac_cv_have_ss_len_in_struct_ss="no" ]
	)
])
if test "x$ac_cv_have_ss_len_in_struct_ss" = "xyes" ; then
	AC_DEFINE(HAVE_SS_LEN_IN_SS, 1, [Does struct sockaddr_storage have ss_len? 1: Yes, 0: No])
else
	AC_DEFINE(HAVE_SS_LEN_IN_SS, 0, [Does struct sockaddr_storage have ss_len? 1: Yes, 0: No])
fi

dnl Check whether this OS defines sin_len as a member of sockaddr_in as a backup to ss_len
AC_CACHE_CHECK([for sin_len field in struct sockaddr_in],
                ac_cv_have_sin_len_in_struct_sai, [
        AC_TRY_COMPILE([
#include <sys/types.h>
#include <sys/socket.h>
                ],
                [ struct sockaddr_in s; s.sin_len = 1; ],
                [ ac_cv_have_sin_len_in_struct_sai="yes" ],
                [ ac_cv_have_sin_len_in_struct_sai="no" ]
        )
])
if test "x$ac_cv_have_sin_len_in_struct_sai" = "xyes" ; then
        AC_DEFINE(HAVE_SIN_LEN_IN_SAI, 1, [Does struct sockaddr_in have sin_len? 1: Yes, 0: No])
else
        AC_DEFINE(HAVE_SIN_LEN_IN_SAI, 0, [Does struct sockaddr_in have sin_len? 1: Yes, 0: No])
fi

dnl Check whether this OS defines sin6_len as a member of sockaddr_in6 as a backup to ss_len
AC_CACHE_CHECK([for sin6_len field in struct sockaddr_in6],
                ac_cv_have_sin6_len_in_struct_sai, [
        AC_TRY_COMPILE([
#include <sys/types.h>
#include <sys/socket.h>
                ],
                [ struct sockaddr_in6 s; s.sin6_len = 1; ],
                [ ac_cv_have_sin6_len_in_struct_sai="yes" ],
                [ ac_cv_have_sin6_len_in_struct_sai="no" ]
        )
])
if test "x$ac_cv_have_sin6_len_in_struct_sai" = "xyes" ; then
        AC_DEFINE(HAVE_SIN6_LEN_IN_SAI, 1, [Does struct sockaddr_in6 have sin6_len? 1: Yes, 0: No])
else
        AC_DEFINE(HAVE_SIN6_LEN_IN_SAI, 0, [Does struct sockaddr_in6 have sin6_len? 1: Yes, 0: No])
fi


AC_ARG_WITH(filedescriptors,
[  --with-filedescriptors=NUMBER
                          Force squid to support NUMBER filedescriptors],
[ 
  case ${withval} in
    [[0-9]]*)
      squid_filedescriptors_num=$withval
      ;;
    *)
      AC_MSG_ERROR(--with-filedescriptors expects a numeric argument)
      ;;
    esac
])

AC_PATH_PROG(CPPUNITCONFIG, cppunit-config, false)
if $CPPUNITCONFIG --help >/dev/null; then
  echo "using system installed cppunit"
  SQUID_CPPUNIT_LIBS="`$CPPUNITCONFIG --libs`"
  SQUID_CPPUNIT_LA=''
  SQUID_CPPUNIT_INC="`$CPPUNITCONFIG --cflags`"
else
  echo "cppunit does not appear to be installed. squid does not require this, but code testing with 'make check' will fail."
  SQUID_CPPUNIT_LA='' 
  SQUID_CPPUNIT_LIBS=''
  SQUID_CPPUNIT_INC=''
fi

AC_ARG_WITH(cppunit-basedir,
[  --with-cppunit-basedir=/path/to/cppunit-base
                          Path where the cppunit headers are libraries are found
			  for unit testing.
			  ],
[ if test -f $withval/include/cppunit/TestCase.h; then
	echo "Using cppunit includes from $withval"
	SQUID_CPPUNIT_INC="-I${withval}/include"
    else
	AC_MSG_ERROR(Cannot find cppunit at $withval)
    fi
  if test -f $withval/lib/libcppunit.la; then
	echo "Using cppunit lib from $withval"
	SQUID_CPPUNIT_LA="${withval}/lib/libcppunit.la"
	SQUID_CPPUNIT_LIBS='$(SQUID_CPPUNIT_LA)'
    else
	AC_MSG_ERROR(Cannot find cppunit at $withval)
	exit 1
    fi
])
AC_SUBST(SQUID_CPPUNIT_LIBS)
AC_SUBST(SQUID_CPPUNIT_LA)
AC_SUBST(SQUID_CPPUNIT_INC)

# 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_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 \
	crypt.h \
	ctype.h \
	errno.h \
	execinfo.h \
	fcntl.h \
	fnmatch.h \
	getopt.h \
	glob.h \
	gnumalloc.h \
	grp.h \
	ip_compat.h \
	ip_fil_compat.h \
	ip_fil.h \
	ip_nat.h \
	ipl.h \
	libc.h \
	limits.h \
	malloc.h \
	math.h \
	memory.h \
	mount.h \
	netdb.h \
	netinet/in.h \
	netinet/in_systm.h \
	netinet/ip_fil_compat.h \
	openssl/err.h \
	openssl/md5.h \
	openssl/ssl.h \
	netinet/tcp.h \
	openssl/engine.h \
	paths.h \
	poll.h \
	pwd.h \
	shadow.h \
	regex.h \
	sched.h \
	signal.h \
	stdarg.h \
	stddef.h \
	stdio.h \
	stdlib.h \
	string.h \
	strings.h \
	sys/bitypes.h \
	sys/bswap.h \
	sys/endian.h \
	sys/file.h \
	sys/ioctl.h \
	sys/param.h \
	sys/prctl.h \
	sys/md5.h \
	sys/msg.h \
	sys/resource.h \
	sys/select.h\
	sys/socket.h \
	sys/stat.h \
	sys/statvfs.h \
	syscall.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 \
	utime.h \
	varargs.h \
	byteswap.h \
	glib.h \
	stdint.h \
	inttypes.h \
	grp.h \
	nss_common.h \
	nss.h \
	db.h \
	db_185.h \
	sys/capability.h
)

AC_CHECK_HEADERS(
	linux/netfilter_ipv4.h \
	linux/netfilter_ipv4/ip_tproxy.h \
,,,
SQUID_DEFAULT_INCLUDES
#if HAVE_LIMITS_H
#include <limits.h>
#endif
/* Netfilter ip(6)tables v1.4.0 has broken headers */
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
)

dnl *BSD dont include the depenencies for all their net/ and netinet/ files
dnl We must include a few basic type headers for them to work.
AC_CHECK_HEADERS( \
	net/if.h \
	netinet/if_ether.h\
	netinet/icmp6.h \
	netinet/ip.h \
	netinet/ip6.h \
	netinet/ip_compat.h\
	netinet/ip_fil.h\
	netinet/ip_icmp.h \
	netinet/ip_nat.h\
	netinet/ipl.h \
	net/pfvar.h \
	sys/mount.h\
	resolv.h \
,,,
SQUID_BSDNET_INCLUDES)

AC_CHECK_HEADERS([libxml/parser.h], [], [
    	SAVED_CPPFLAGS="$CPPFLAGS"
	CPPFLAGS="-I/usr/include/libxml2 $CPPFLAGS"
	unset ac_cv_header_libxml_parser_h
	AC_CHECK_HEADERS([libxml/parser.h], [], [
		CPPFLAGS="$SAVED_CPPFLAGS"
		])
	])

AC_C_CONST
AC_C_BIGENDIAN

AC_STRUCT_TM
AC_CHECK_MEMBERS([struct tm.tm_gmtoff],,,[
#if TM_IN_SYS_TIME
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#elif HAVE_TIME_H
#include <time.h>
#endif
])

AC_CHECK_TYPE(struct mallinfo,AC_DEFINE(HAVE_STRUCT_MALLINFO,1,[The system provides struct mallinfo]),,[
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_MALLOC_H
#include <malloc.h>
#endif])

AC_CHECK_MEMBERS([struct mallinfo.mxfast],,,[
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_MALLOC_H
#include <malloc.h>
#endif])

dnl Override rusage() detect on MinGW because is emulated in source code
case "$host_os" in
  mingw|mingw32)
    AC_DEFINE(HAVE_STRUCT_RUSAGE)
    ac_cv_func_getrusage='yes'
    echo "Using own rusage on Windows."
    ;;
  *)      
    AC_CHECK_TYPE(struct rusage,AC_DEFINE(HAVE_STRUCT_RUSAGE,1,[The system provides struct rusage]),,[
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#if HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif])
    ;;
esac

AC_CHECK_MEMBERS([struct iphdr.ip_hl],,,[
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#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])

dnl Check for typedefs
AC_CHECK_SIZEOF(void *)

dnl 8 bit integers - int8_t
dnl if this is defined we trust it to be 8 bits
AC_CHECK_TYPE(int8_t,[
  AC_CHECK_SIZEOF(int8_t,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_INT8_T,1,[int8_t is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl fallback #1
AC_CHECK_TYPE(char,[
  AC_CHECK_SIZEOF(char,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_CHAR,1,[char is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl unsigned 8 bit ints - u_int8_t
dnl if this is defined we trust it to be 8 bits
AC_CHECK_TYPE(u_int8_t,[
  AC_CHECK_SIZEOF(u_int8_t,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_U_INT8_T,1,[u_int8_t is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl fallback #1
dnl if this is defined we trust it to be 8 bits
AC_CHECK_TYPE(uint8_t,[
  AC_CHECK_SIZEOF(uint8_t,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_UINT8_T,1,[uint8_t is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl 16 bit integers - int16_t
dnl if this is defined we trust it to be 16 bits
AC_CHECK_TYPE(int16_t,[
  AC_CHECK_SIZEOF(int16_t,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_INT16_T,1,[int16_t is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl fallback #1
AC_CHECK_TYPE(short,[
  AC_CHECK_SIZEOF(short,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_SHORT,1,[short is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl fallback #2
AC_CHECK_TYPE(int,[
  AC_CHECK_SIZEOF(int,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_INT,1,[int is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl unsigned 16 bit ints - u_int16_t
dnl if this is defined we trust it to be 16 bits
AC_CHECK_TYPE(u_int16_t,[
  AC_CHECK_SIZEOF(u_int16_t,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_U_INT16_T,1,[u_int16_t is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl fallback #1
dnl if this is defined we trust it to be 16 bits
AC_CHECK_TYPE(uint16_t,[
  AC_CHECK_SIZEOF(uint16_t,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_UINT16_T,1,[uint16_t is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl 32 bit signed int - int32_t
dnl if this is defined we trust it to be 32 bits
AC_CHECK_TYPE(int32_t,[
  AC_CHECK_SIZEOF(int32_t,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_INT32_T,1,[int32_t is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl fallback #1
AC_CHECK_TYPE(long,[
  AC_CHECK_SIZEOF(long,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_LONG,1,[long is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl 32 bit unsigned int - u_int32_t
dnl if this is defined we trust it to be 32 bits
AC_CHECK_TYPE(u_int32_t,[
  AC_CHECK_SIZEOF(u_int32_t,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_U_INT32_T,1,[u_int32_t is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl fallback #1
dnl if this is defined we trust it to be 32 bits
AC_CHECK_TYPE(uint32_t,[
  AC_CHECK_SIZEOF(uint32_t,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_UINT32_T,1,[uint32_t is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl 64 bit signed - int64_t
dnl if this is defind we trust it to be 64 bits
AC_CHECK_TYPE(int64_t,[
  AC_CHECK_SIZEOF(int64_t,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_INT64_T,1,[int64_t is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl fallback #1
dnl if this is defind we trust it to be 64 bits
AC_CHECK_TYPE(__int64,[
  AC_CHECK_SIZEOF(__int64,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE___INT64,1,[__int64 is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl fallback #2
AC_CHECK_TYPE(long long,[
  AC_CHECK_SIZEOF(long long,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_LONG_LONG,1,[long long is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl 64 bit unsigned - u_int64_t
dnl if this is defind we trust it to be 64 bits
AC_CHECK_TYPE(u_int64_t,[
  AC_CHECK_SIZEOF(u_int64_t,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_U_INT64_T,1,[u_int64_t is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl fallback #1
dnl if this is defind we trust it to be 64 bits
AC_CHECK_TYPE(uint64_t,[
  AC_CHECK_SIZEOF(uint64_t,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_UINT64_T,1,[uint64_t is defined in system headers])
  ],,SQUID_DEFAULT_INCLUDES)

dnl On Solaris 9 x86, gcc may includes a "fixed" set of old system include files
dnl that is incompatible with the updated Solaris header files.
dnl For this reason, we must check if pad128_t and upad128_t are defined.
AC_CHECK_TYPE(pad128_t,
  AC_DEFINE(HAVE_PAD128_T,1,[pad128_t is defined in system headers]),
  ,SQUID_DEFAULT_INCLUDES)

AC_CHECK_TYPE(upad128_t,
  AC_DEFINE(HAVE_UPAD128_T,1,[upad128_t is defined in system headers]),
  ,SQUID_DEFAULT_INCLUDES)

AC_CHECK_TYPE(pid_t, AC_DEFINE(HAVE_PID_T,1,[pid_t is defined by the system headers]),,SQUID_DEFAULT_INCLUDES)
AC_CHECK_TYPE(size_t, [AC_CHECK_SIZEOF(size_t,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_SIZE_T,1,[size_t is defined by the system headers])],,SQUID_DEFAULT_INCLUDES)
AC_CHECK_TYPE(ssize_t, AC_DEFINE(HAVE_SSIZE_T,1,[ssize_t is defined by the system headers]),,SQUID_DEFAULT_INCLUDES)
AC_CHECK_TYPE(off_t,[ AC_CHECK_SIZEOF(off_t,,SQUID_DEFAULT_SIZEOF_INCLUDES)
  AC_DEFINE(HAVE_OFF_T,1,[off_t is defined by the system headers])],,SQUID_DEFAULT_INCLUDES)
AC_CHECK_TYPE(mode_t, AC_DEFINE(HAVE_MODE_T,1,[mode_t is defined by the system headers]),,SQUID_DEFAULT_INCLUDES)
AC_CHECK_TYPE(fd_mask,  AC_DEFINE(HAVE_FD_MASK,1,[fd_mask is defined by the system headers]),,SQUID_DEFAULT_INCLUDES)

dnl Check for special functions
AC_FUNC_ALLOCA

AC_CHECK_TYPE(socklen_t,AC_DEFINE(HAVE_SOCKLEN_T,1,[socklen_t is defined by the system headers]),,[
#include <sys/types.h>
#include <sys/socket.h>
#if STDC_HEADERS
#include <stdlib.h>
#include <stddef.h>
#endif])

AC_CHECK_TYPE(mtyp_t,AC_DEFINE(HAVE_MTYP_T,1,[mtyp_t is defined by the system headers]),,[#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>])

dnl Check for needed libraries
AC_CHECK_LIB(nsl, main)
AC_CHECK_LIB(socket, main)
dnl Check for Winsock only on MinGW, on Cygwin we must use emulated BSD socket API
case "$host_os" in
  mingw|mingw32)
    AC_MSG_CHECKING(for winsock)
    save_LIBS="$LIBS"
    for curlib in ws2_32 wsock32; do
	LIBS="$LIBS -l$curlib"
	AC_TRY_LINK([
			char __attribute__((stdcall)) socket(int,int,int);
			char __attribute__((stdcall)) select(int,int,int,int,int);
			char __attribute__((stdcall)) closesocket(int);
			char __attribute__((stdcall)) gethostname(int,int);
			],
			[
			socket(1,2,3);
			select(1,2,3,4,5);
			closesocket(1);
			gethostname(1,2);
			],
			have_winsock=yes, have_winsock=no)

	if test $have_winsock = yes; then
		ac_cv_func_select='yes'
		if test $curlib = ws2_32; then
			have_winsock=winsock2
		fi
		break
	fi
	LIBS="$save_LIBS"
    done
    AC_MSG_RESULT($have_winsock)
    if test $have_winsock = winsock2; then
       AC_CHECK_HEADERS(winsock2.h)
    else
       AC_CHECK_HEADERS(winsock.h)
    fi
    ;;
esac

dnl Ripped from the Samba sources
AC_CACHE_CHECK([for unix domain sockets],squid_cv_unixsocket, [
    AC_TRY_COMPILE([
#include <sys/types.h>
#include <stdlib.h>
#include <stddef.h>
#include <sys/socket.h>
#include <sys/un.h>],
[
  struct sockaddr_un sunaddr; 
  sunaddr.sun_family = AF_UNIX;
],
        squid_cv_unixsocket=yes,squid_cv_unixsocket=no)])
if test x"$squid_cv_unixsocket" = x"yes"; then
   AC_DEFINE(HAVE_UNIXSOCKET,1,[Do we have unix sockets? (required for the winbind ntlm helper])
fi
dnl end rip

  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

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 $host"
		;;
	*)
		AC_CHECK_LIB(resolv, main)
		;;
    esac
fi
case "$host_os" in
mingw|mingw32)
	echo "Use MSVCRT for math functions."
	;;
	*)
	AC_CHECK_LIB(m, main)
	;;
esac

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

dnl Solaris10 provides MD5 natively through libmd5
AC_CHECK_LIB(md5, MD5Init, [CRYPTLIB="$CRYPTLIB -lmd5"])

AC_SUBST(CRYPTLIB)

dnl Check for libdl, used by auth_modules/PAM
if test "$with_dl" = "yes"; then
    AC_CHECK_LIB(dl, dlopen)
fi

dnl Check for pthreads
dnl We use pthreads when doing ASYNC I/O
if test "$with_pthreads" = "yes"; then
    SQUID_CFLAGS="$SQUID_CFLAGS -D_REENTRANT"
    SQUID_CXXFLAGS="$SQUID_CXXFLAGS -D_REENTRANT"
    case "$host" in
    i386-unknown-freebsd*)
        if test "$GCC" = "yes" ; then
            if test -z "$PRESET_LDFLAGS"; then
                LDFLAGS="$LDFLAGS -pthread"
            fi
        fi
    ;;
    *-solaris2.*)
        if test "$GCC" = "yes" ; then
	    SQUID_CFLAGS="$SQUID_CFLAGS -pthreads"
	    SQUID_CXXFLAGS="$SQUID_CXXFLAGS -pthreads"
	else
	    SQUID_CFLAGS="$SQUID_CFLAGS -mt"
	    SQUID_CXXFLAGS="$SQUID_CXXFLAGS -mt"
        fi
    ;;
    esac
    AC_CHECK_LIB(pthread, main)
fi

dnl Check for librt
dnl We use AIO in the coss store
if test "$with_aio" = "yes"; then
    dnl On some systems POSIX AIO functions are in libaio
    AC_CHECK_LIB(rt, aio_read,,AC_CHECK_LIB(aio, aio_read))
fi

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 On MinGW OpenLDAP is not available, so LDAP helpers can be linked 
dnl only with Windows LDAP libraries using -lwldap32
case "$host_os" in
mingw|mingw32)
       LIB_LDAP="-lwldap32"
       LIB_LBER=""
       ;;
*)
       LIB_LDAP="-lldap"
       dnl LDAP helpers need to know if -llber is needed or not
       AC_CHECK_LIB(lber, main, [LIB_LBER="-llber"])
       ;;
esac
AC_SUBST(LIB_LDAP)
AC_SUBST(LIB_LBER)

dnl Check for libdb
DBLIB=
dnl 1.85
AC_CACHE_CHECK(if dbopen needs -ldb,ac_cv_dbopen_libdb, [
SAVED_LIBS="$LIBS"; LIBS="$LIBS -ldb"
  AC_TRY_LINK([
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_LIMITS_H
#include <limits.h>
#endif
#if HAVE_DB_185_H
#include <db_185.h>
#elif HAVE_DB_H
#include <db.h>
#endif],
    [dbopen((void *)0L, 0, 0, DB_HASH, (void *)0L)],
    ac_cv_dbopen_libdb="yes",
    ac_cv_dbopen_libdb="no")
LIBS="$SAVED_LIBS"
])
if test $ac_cv_dbopen_libdb = yes; then
    LIB_DB="-ldb"
fi
AC_SUBST(LIB_DB)

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 $LIBS | sed -e s/-lbsd//`
		;;
	*m88k*)
		SQUID_CFLAGS="$SQUID_CFLAGS -D_SQUID_MOTOROLA_"
		SQUID_CXXFLAGS="$SQUID_CXXFLAGS -D_SQUID_MOTOROLA_"
		AC_DEFINE(GETTIMEOFDAY_NO_TZP,1,[If gettimeofday is known to take only one argument])
		;;
	[*-*-solaris2.[0-4]])
		AC_DEFINE(GETTIMEOFDAY_NO_TZP,1)
		;;
	[*-sony-newsos[56]*])
		AC_DEFINE(GETTIMEOFDAY_NO_TZP,1)
		;;
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@squid-cache.org) 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 Override statfs() detect on MinGW becasue is emulated in source code
case "$host_os" in
mingw|mingw32)
	ac_cv_func_statfs='yes'
	;;
esac

dnl Check for library functions
AC_CHECK_FUNCS(\
	backtrace_symbols_fd \
	bcopy \
	bswap_16 \
	bswap_32 \
	bswap16 \
	bswap32 \
	fchmod \
	getdtablesize \
	getpagesize \
	getpass \
	getrlimit \
	getrusage \
	getspnam \
	gettimeofday \
	glob \
	htobe16 \
	htole16 \
	kqueue\
	lrand48 \
	mallinfo \
	mallocblksize \
	mallopt \
	memcpy \
	memmove \
	memset \
	mkstemp \
	mktime \
	mstats \
	poll \
	prctl \
	pthread_attr_setschedparam \
	pthread_attr_setscope \
	pthread_setschedparam \
	pthread_sigmask \
	putenv \
	random \
	regcomp \
	regexec \
	regfree \
	res_init \
	__res_init \
	rint \
	sbrk \
	select \
	seteuid \
	setgroups \
	setpgrp \
	setrlimit \
	setsid \
	sigaction \
	snprintf \
	socketpair \
	srand48 \
	srandom \
	statfs \
	strsep \
	strtoll \
	sysconf \
	syslog \
	timegm \
	vsnprintf \
)
dnl ... and some we provide local replacements for
AC_REPLACE_FUNCS(\
	drand48 \
	inet_ntop \
	inet_pton \
	initgroups \
	getaddrinfo \
	getnameinfo \
	strerror \
	tempnam \
)

# check for crypt, may require -lcrypt
SAVED_LIBS="$LIBS"
LIBS="$LIBS $CRYPTLIB"
AC_CHECK_FUNCS(crypt)
LIBS="$SAVED_LIBS"

# Check for libepoll
EPOLL_LIB=
AC_CHECK_LIB(epoll, epoll_ctl, [EPOLL_LIBS="-lepoll"])
AC_SUBST(EPOLL_LIBS)

# Check for epoll_ctl, may need -lepoll
SAVED_LIBS="$LIBS"
LIBS="$LIBS $LIB_EPOLL"
AC_CHECK_FUNCS(epoll_ctl)
LIBS="$SAVED_LIBS"

dnl Verify that epoll really works
if test $ac_cv_func_epoll_ctl = yes; then
  AC_CACHE_CHECK(if epoll works, ac_cv_epoll_works,
    AC_TRY_RUN([
#include <sys/epoll.h>
#include <stdlib.h>
#include <stdio.h>
int main(int argc, char **argv)
{
    int fd = epoll_create(256);
    if (fd < 0) {
	perror("epoll_create:");
	exit(1);
    }
    exit(0);
}
    ], [ac_cv_epoll_works=yes], [ac_cv_epoll_works=no]))
fi

dnl Magic which checks whether we are forcing a type of comm loop we
dnl are actually going to (ab)use
 
dnl Actually do the define magic now
dnl mostly ripped from squid-commloops, thanks to adrian and benno

if test -n "$SELECT_TYPE"; then
	: # Already decided above. Nothing to do here
elif test -z "$disable_epoll" && test "$ac_cv_epoll_works" = "yes" ; then
	SELECT_TYPE="epoll"
elif test -z "$disable_kqueue" && test "$ac_cv_func_kqueue" = "yes" ; then
	SELECT_TYPE="kqueue"
elif test -z "$disable_poll" && test "$ac_cv_func_poll" = "yes" ; then
        SELECT_TYPE="poll"
elif test -z "$disable_select" && test "$ac_cv_func_select" = "yes" ; then
	case "$host_os" in
	mingw|mingw32)
	        SELECT_TYPE="select_win32"
		;;
	*)
	        SELECT_TYPE="select"
		;;
	esac
else
        echo "Eep!  Can't find poll, kqueue, epoll, or select!"
        echo "I'll try select and hope for the best."
        SELECT_TYPE="select"
        AC_DEFINE(USE_SELECT,1)
fi

echo "Using ${SELECT_TYPE} for the IO loop."

AM_CONDITIONAL([USE_POLL], [test $SELECT_TYPE = poll])
AM_CONDITIONAL([USE_EPOLL], [test $SELECT_TYPE = epoll])
AM_CONDITIONAL([USE_SELECT], [test $SELECT_TYPE = select])
AM_CONDITIONAL([USE_SELECT_SIMPLE], [test $SELECT_TYPE = select_simple])
AM_CONDITIONAL([USE_SELECT_WIN32], [test $SELECT_TYPE = select_win32])
AM_CONDITIONAL([USE_KQUEUE], [test $SELECT_TYPE = kqueue])
AM_CONDITIONAL([USE_DEVPOLL], [test $SELECT_TYPE = devpoll])

case $SELECT_TYPE in
epoll)
	AC_DEFINE(USE_EPOLL,1,[Use epoll() for the IO loop])
	;;
poll)
        AC_DEFINE(USE_POLL,1,[Use poll() for the IO loop])
	;;
kqueue)
	AC_DEFINE(USE_KQUEUE,1,[Use kqueue() for the IO loop])
	;;
select_win32)
	AC_DEFINE(USE_SELECT_WIN32,1,[Use Winsock select() for the IO loop])
	;;
select)
	AC_DEFINE(USE_SELECT,1,[Use select() for the IO loop])
	;;
esac



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,1,[Yay! Another Linux brokenness.  Its not good enough to know that setresuid() exists, because RedHat 5.0 declare setresuid() but doesn't implement it.])
fi

dnl Yay!  This one is  a MacOSX brokenness.  Its not good enough
dnl to know that strnstr() exists, because MacOSX 10.4 have a bad
dnl copy that crashes with a buffer over-run!
dnl
AC_CACHE_CHECK(if strnstr is well implemented, ac_cv_func_strnstr,
  AC_TRY_RUN([
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
    // we expect this to succeed, or crash on over-run.
    // if it passes otherwise we may need a better check.
int main(int argc, char **argv)
{
    int size = 20;
    char *str = malloc(size);
    memset(str, 'x', size);
    strnstr(str, "fubar", size);
    return 0;
}
  ],ac_cv_func_strnstr="yes",ac_cv_func_strnstr="no")
)
if test "$ac_cv_func_strnstr" = "yes" ; then
  AC_DEFINE(HAVE_STRNSTR,1,[Yay! We have a working strnstr!])
else
  AC_DEFINE(HAVE_STRNSTR,0,[Yay! A MacOS X brokenness. Its not good enough to know that strnstr() exists, because MacOSX 10.4 and earlier may have a buffer overrun.])
fi


AM_CONDITIONAL(NEED_OWN_STRSEP, false)
if test "$ac_cv_func_strsep" = "no" ; then
  AM_CONDITIONAL(NEED_OWN_STRSEP, true)
fi

AM_CONDITIONAL(NEED_OWN_STRTOLL, false)
if test "$ac_cv_func_strtoll" = "no" ; then
  AM_CONDITIONAL(NEED_OWN_STRTOLL, true)
fi

dnl
dnl Test for va_copy
dnl
AC_CACHE_CHECK(if va_copy is implemented, ac_cv_func_va_copy,
  AC_TRY_RUN([
      #include <stdarg.h>
      void f (int i, ...) {
         va_list args1, args2;
         va_start (args1, i);
         va_copy (args2, args1);
         if (va_arg (args2, int) != 42 || va_arg (args1, int) != 42)
            exit (1);
         va_end (args1); va_end (args2);
      }
      int main() {
         f (0, 42);
         return 0;
      }
      ],ac_cv_func_va_copy="yes",ac_cv_func_va_copy="no")
)
if test "$ac_cv_func_va_copy" = "yes" ; then
  AC_DEFINE(HAVE_VA_COPY, 1, [If your system have va_copy])
fi

dnl
dnl Some systems support __va_copy
dnl
AC_CACHE_CHECK(if __va_copy is implemented, ac_cv_func___va_copy,
  AC_TRY_RUN([
      #include <stdarg.h>
      void f (int i, ...) {
         va_list args1, args2;
         va_start (args1, i);
         __va_copy (args2, args1);
         if (va_arg (args2, int) != 42 || va_arg (args1, int) != 42)
            exit (1);
         va_end (args1); va_end (args2);
      }
      int main() {
         f (0, 42);
         return 0;
      }
      ],ac_cv_func___va_copy="yes",ac_cv_func___va_copy="no")
)
if test "$ac_cv_func___va_copy" = "yes" ; then
  AC_DEFINE(HAVE___VA_COPY, 1, [Some systems have __va_copy instead of va_copy])
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 "$IPF_TRANSPARENT" = "no" ; then
    echo "WARNING: Cannot find necessary IP-Filter header files"
    echo "         Transparent Proxy support WILL NOT be enabled"
    sleep 10
elif test "$IPF_TRANSPARENT" = "yes" ; then
dnl On Solaris Ipfilter includes expect that SOLARIS2 is defined with the
dnl Solaris minor version (8, 9, 10, ...)
    case "$host" in
	*-solaris*)
	    solrev=`uname -r | sh -c 'IFS=. read j n x; echo $n'`
	    CFLAGS="-DSOLARIS2=$solrev $CFLAGS" 
	    CXXFLAGS="-DSOLARIS2=$solrev $CXXFLAGS" 
	    ;;
	*)
	    ;;
    esac
fi

dnl PF support requires a header file.
if test "$PF_TRANSPARENT" ; then
    AC_MSG_CHECKING(if PF header file is installed)
    # hold on to your hats...
    if test "$ac_cv_header_net_pfvar_h" = "yes"; then
        PF_TRANSPARENT="yes"
        AC_DEFINE(PF_TRANSPARENT, 1)
    else
        PF_TRANSPARENT="no"
        AC_DEFINE(PF_TRANSPARENT, 0)
    fi
    AC_MSG_RESULT($PF_TRANSPARENT)
fi
if test "$PF_TRANSPARENT" = "no" ; then
    echo "WARNING: Cannot find necessary PF header file"
    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 "$LINUX_NETFILTER" ; then
    AC_MSG_CHECKING(if Linux (Netfilter) kernel header files are installed)
    # hold on to your hats...
    if test "$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 kernel (Netfilter) header files"
    echo "         Linux Transparent and Intercepting Proxy support WILL NOT be enabled"
    sleep 10
fi

dnl Linux Netfilter/TPROXYv2 support requires some specific header files
dnl Shamelessly copied from shamelessly copied from above
if test "$LINUX_TPROXY2" ; then
    AC_MSG_CHECKING(if TPROXYv2 header files are installed)
    # hold on to your hats...
    if test "$ac_cv_header_linux_netfilter_ipv4_ip_tproxy_h" = "yes" && test "$LINUX_NETFILTER" = "yes"; then
	LINUX_TPROXY2="yes"
	AC_DEFINE(LINUX_TPROXY2, 1, [Enable real Transparent Proxy support for Netfilter TPROXY v2.])
    else
	LINUX_TPROXY2="no"
	AC_DEFINE(LINUX_TPROXY2, 0, [Enable real Transparent Proxy support for Netfilter TPROXY v2.])
    fi
    AC_MSG_RESULT($LINUX_TPROXY2)
    if test "$LINUX_TPROXY2" = "no" && test "$LINUX_NETFILTER" = "yes"; then
        echo "WARNING: Cannot find TPROXY v2 headers, you need to install the"
        echo "tproxy package from:"
        echo " - lynx http://www.balabit.com/downloads/tproxy/"
        echo "Or select the '--enable-linux-netfilter' option instead for Netfilter support."
        sleep 10
    fi
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,1,[Define if we should use GNU regex])
fi
AC_SUBST(REGEXLIB)
AC_SUBST(LIBREGEX)

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
#if HAVE_WINSOCK_H
#include <winsock.h>
#endif
#if HAVE_WINSOCK2_H
#include <winsock2.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, [Default FD_SETSIZE value])


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="$LDFLAGS"
if test -n "$squid_filedescriptors_num" ; then
  SQUID_MAXFD=$squid_filedescriptors_num
  AC_MSG_RESULT($SQUID_MAXFD (user-forced))
else
  case $host in
  i386-unknown-freebsd*)
      if echo "$LDFLAGS" | grep -q pthread; then
  	LDFLAGS=`echo $LDFLAGS | sed -e "s/-pthread//"`
      fi
  esac
  AC_TRY_RUN([
#include <stdio.h>
#include <unistd.h>
#include <sys/time.h>	/* needed on FreeBSD */
#include <sys/param.h>
#include <sys/resource.h>
main() {
	FILE *fp;
	int i,j;
#if defined(__CYGWIN32__) || defined (__CYGWIN__)
    /* getrlimit and sysconf returns bogous values on cygwin32.
     * Number of fds is virtually unlimited in cygwin (sys/param.h)
     * __CYGWIN32__ is deprecated.
     */
    i = NOFILE;
#else
#if HAVE_SETRLIMIT
    struct rlimit rl;
#if defined(RLIMIT_NOFILE)
    if (getrlimit(RLIMIT_NOFILE, &rl) < 0) {
        perror("getrlimit: RLIMIT_NOFILE");
    } else {
#if defined(__APPLE__)
        /* asking for more than OPEN_MAX fails on Leopard */
        rl.rlim_cur = (OPEN_MAX < rl.rlim_max ? OPEN_MAX : rl.rlim_max);
#else
        rl.rlim_cur = rl.rlim_max;      /* set it to the max */
#endif
        if (setrlimit(RLIMIT_NOFILE, &rl) < 0) {
            perror("setrlimit: RLIMIT_NOFILE");
        }
    }
#elif defined(RLIMIT_OFILE)
    if (getrlimit(RLIMIT_OFILE, &rl) < 0) {
        perror("getrlimit: RLIMIT_OFILE");
    } else {
        rl.rlim_cur = rl.rlim_max;      /* set it to the max */
        if (setrlimit(RLIMIT_OFILE, &rl) < 0) {
            perror("setrlimit: RLIMIT_OFILE");
        }
    }
#endif /* RLIMIT_NOFILE */
#endif /* HAVE_SETRLIMIT */
	/* by starting at 2^14, we will never get higher
	than 2^15 for SQUID_MAXFD */
        i = j = 1<<14;
        while (j) {
                j >>= 1;
                if (dup2(0, i) < 0) { 
                        i -= j;
                } else {
                        close(i);
                        i += j;
                }
        }
        i++;
#endif /* IF !DEF CYGWIN */
	fp = fopen("conftestval", "w");
	fprintf (fp, "%d\n", i & ~0x3F);
	exit(0);
}
  ],
  SQUID_MAXFD=`cat conftestval`,
  SQUID_MAXFD=256,
  SQUID_MAXFD=256)
  dnl Microsoft MSVCRT.DLL supports 2048 maximum FDs
  case "$host_os" in
  mingw|mingw32)
    SQUID_MAXFD="2048"
    ;;
  esac
  AC_MSG_RESULT($SQUID_MAXFD)
fi
AC_DEFINE_UNQUOTED(SQUID_MAXFD, $SQUID_MAXFD,[Maximum number of open filedescriptors])
if test "$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"

if test `expr $SQUID_MAXFD % 64` != 0; then
    echo "WARNING: $SQUID_MAXFD is not an multiple of 64. This may cause issues"
    echo "         on certain platforms."
    sleep 10
fi

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>
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_WINSOCK_H
#include <winsock.h>
#endif
#if HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
main ()
{
	FILE *fp;
        int fd,val=0,len=sizeof(int);
#if (defined(WIN32) || defined(__WIN32__) || defined(__WIN32)) && !(defined(__CYGWIN32__) || defined(__CYGWIN__))
	WSADATA wsaData;
	WSAStartup(2, &wsaData);
#endif
	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) exit(1);
        if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &val, &len) < 0) exit(1);
#if (defined(WIN32) || defined(__WIN32__) || defined(__WIN32)) && !(defined(__CYGWIN32__) || defined(__CYGWIN__))
	WSACleanup();
#endif
	if (val<=0) exit(1);
        fp = fopen("conftestval", "w");
        fprintf (fp, "%d\n", val);
	exit(0);
}
],
SQUID_DETECT_UDP_SO_SNDBUF=`cat conftestval`,
SQUID_DETECT_UDP_SO_SNDBUF=16384,
SQUID_DETECT_UDP_SO_SNDBUF=16384)
AC_MSG_RESULT($SQUID_DETECT_UDP_SO_SNDBUF)
AC_DEFINE_UNQUOTED(SQUID_DETECT_UDP_SO_SNDBUF, $SQUID_DETECT_UDP_SO_SNDBUF,[UDP send buffer size])

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>
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_WINSOCK_H
#include <winsock.h>
#endif
#if HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
main ()
{
	FILE *fp;
        int fd,val=0,len=sizeof(int);
#if (defined(WIN32) || defined(__WIN32__) || defined(__WIN32)) && !(defined(__CYGWIN32__) || defined(__CYGWIN__))
	WSADATA wsaData;
	WSAStartup(2, &wsaData);
#endif
	if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) exit(1);
        if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &val, &len) < 0) exit(1);
#if (defined(WIN32) || defined(__WIN32__) || defined(__WIN32)) && !(defined(__CYGWIN32__) || defined(__CYGWIN__))
	WSACleanup();
#endif
	if (val <= 0) exit(1);
	fp = fopen("conftestval", "w"); 
	fprintf (fp, "%d\n", val);
	exit(0);
}
],
SQUID_DETECT_UDP_SO_RCVBUF=`cat conftestval`,
SQUID_DETECT_UDP_SO_RCVBUF=16384,
SQUID_DETECT_UDP_SO_RCVBUF=16384)
AC_MSG_RESULT($SQUID_DETECT_UDP_SO_RCVBUF)
AC_DEFINE_UNQUOTED(SQUID_DETECT_UDP_SO_RCVBUF, $SQUID_DETECT_UDP_SO_RCVBUF,[UDP receive buffer size])

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>
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_WINSOCK_H
#include <winsock.h>
#endif
#if HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
main ()
{
	FILE *fp;
        int fd,val=0,len=sizeof(int);
#if (defined(WIN32) || defined(__WIN32__) || defined(__WIN32)) && !(defined(__CYGWIN32__) || defined(__CYGWIN__))
	WSADATA wsaData;
	WSAStartup(2, &wsaData);
#endif
	if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) exit(1);
        if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &val, &len) < 0) exit(1);
#if (defined(WIN32) || defined(__WIN32__) || defined(__WIN32)) && !(defined(__CYGWIN32__) || defined(__CYGWIN__))
	WSACleanup();
#endif
	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)
if test $SQUID_TCP_SO_SNDBUF -gt 32768; then
    echo "Limiting send buffer size to 32K"
    SQUID_TCP_SO_SNDBUF=32768
fi
AC_DEFINE_UNQUOTED(SQUID_TCP_SO_SNDBUF, $SQUID_TCP_SO_SNDBUF,[TCP send buffer size])

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>
#if HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_WINSOCK_H
#include <winsock.h>
#endif
#if HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
main ()
{
	FILE *fp;
        int fd,val=0,len=sizeof(int);
#if (defined(WIN32) || defined(__WIN32__) || defined(__WIN32)) && !(defined(__CYGWIN32__) || defined(__CYGWIN__))
	WSADATA wsaData;
	WSAStartup(2, &wsaData);
#endif
	if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) exit(1);
        if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &val, &len) < 0) exit(1);
#if (defined(WIN32) || defined(__WIN32__) || defined(__WIN32)) && !(defined(__CYGWIN32__) || defined(__CYGWIN__))
	WSACleanup();
#endif
	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)
if test $SQUID_TCP_SO_RCVBUF -gt 65535; then
    echo "Limiting receive buffer size to 64K"
    SQUID_TCP_SO_RCVBUF=65535
fi
AC_DEFINE_UNQUOTED(SQUID_TCP_SO_RCVBUF, $SQUID_TCP_SO_RCVBUF,[TCP receive buffer size])
AC_CACHE_CHECK(if sys_errlist is already defined, ac_cv_needs_sys_errlist,
  AC_TRY_COMPILE([#include <stdio.h>],[char *s = sys_errlist;],
    ac_cv_needs_sys_errlist="no",
    ac_cv_needs_sys_errlist="yes")
)
if test "$ac_cv_needs_sys_errlist" = "yes" ; then
  AC_DEFINE(NEED_SYS_ERRLIST,1,[If we need to declare sys_errlist[] as external])
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,1,[If libresolv.a has been hacked to export _dns_ttl_])],
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 "$INET_NTOA_RESULT" = "1.2.3.4" ; then
	AC_MSG_RESULT("yes")
else
	AC_MSG_RESULT("no")
	case "$host_os" in
	mingw|mingw32)
	  echo "Using Win32 resolver instead."
	  ;;
	*)
	  echo "Will use our own inet_ntoa()."
	  AC_LIBOBJ(inet_ntoa)
#	  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
	  ;;
	esac
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,1,[If your system has statvfs(), and if it actually works!])
fi
fi

dnl Detect what resolver fields we have available to use...
AC_CACHE_CHECK(for _res_ext.nsaddr_list, ac_cv_have_res_ext_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_ext.nsaddr_list[[0]].s_addr;],
ac_cv_have_res_ext_nsaddr_list="yes",
ac_cv_have_res_ext_nsaddr_list="no"))
if test "$ac_cv_have_res_ext_nsaddr_list" = "yes" ; then
  AC_DEFINE(_SQUID_RES_NSADDR6_LARRAY,_res_ext.nsaddr_list,[If _res_ext structure has nsaddr_list member])
  AC_DEFINE(_SQUID_RES_NSADDR6_COUNT,ns6count,[Nameserver Counter for IPv6 _res_ext])
fi

if test "$_SQUID_RES_NSADDR6_LIST" == ""; then
AC_CACHE_CHECK(for _res._u._ext.nsaddrs, ac_cv_have_res_ext_nsaddrs,
AC_TRY_COMPILE([
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#if HAVE_ARPA_NAMESER_H
#include <arpa/nameser.h>
#endif
#if HAVE_RESOLV_H
#include <resolv.h>
#endif
],
[_res._u._ext.nsaddrs[[0]]->sin6_addr;],
ac_cv_have_res_ext_nsaddrs="yes",
ac_cv_have_res_ext_nsaddrs="no"))
if test "$ac_cv_have_res_ext_nsaddrs" = "yes" ; then
  AC_DEFINE(_SQUID_RES_NSADDR6_LPTR,_res._u._ext.nsaddrs,[If _res structure has _ext.nsaddrs member])
  AC_DEFINE(_SQUID_RES_NSADDR6_COUNT,_res._u._ext.nscount6,[Nameserver Counter for IPv6 _res])
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(_SQUID_RES_NSADDR_LIST,_res.nsaddr_list,[If _res structure has nsaddr_list member])
  AC_DEFINE(_SQUID_RES_NSADDR_COUNT,_res.nscount,[Nameserver counter for IPv4 _res])
fi

if test "$_SQUID_RES_NSADDR_LIST" == ""; 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(_SQUID_RES_NSADDR_LIST,_res.ns_list,[If _res structure has ns_list member])
  AC_DEFINE(_SQUID_RES_NSADDR_COUNT,_res.nscount,[Nameserver counter for IPv4 _res])
fi
fi

dnl Squid now has .po translation capability, given the right toolkit
AX_WITH_PROG([PO2HTML],[po2html])
AC_SUBST(PO2HTML)

dnl Squid now has limited locale handling ...
dnl on error pages
AC_ARG_ENABLE(auto-locale,
[  --enable-auto-locale  This enables squid to lookup translated error pages
                          based on the clients request headers. Without it squid
                          is limited to a single language set in squid.conf],
[ if test "$enableval" = "yes" ; then
    echo "Enabling Multi-Language Support"
    AC_DEFINE(USE_ERR_LOCALES,1,[Use multi-language support on error pages])
 else
    echo "Disabling Multi-Language Support"
    AC_DEFINE(USE_ERR_LOCALES,0,[Use multi-language support on error pages])
  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 

AC_CONFIG_FILES([\
	Makefile \
	lib/Makefile \
	scripts/Makefile \
	scripts/RunCache \
	scripts/RunAccel \
	src/Makefile \
	src/fs/Makefile \
	src/repl/Makefile \
	src/auth/Makefile \
	src/adaptation/Makefile \
	src/ICAP/Makefile \
	src/eCAP/Makefile \
	contrib/Makefile \
	snmplib/Makefile \
	icons/Makefile \
	errors/Makefile \
	test-suite/Makefile \
	doc/Makefile \
	helpers/Makefile \
	helpers/basic_auth/Makefile \
	helpers/basic_auth/LDAP/Makefile \
	helpers/basic_auth/MSNT/Makefile \
	helpers/basic_auth/NCSA/Makefile \
	helpers/basic_auth/PAM/Makefile \
	helpers/basic_auth/SMB/Makefile \
	helpers/basic_auth/mswin_sspi/Makefile \
	helpers/basic_auth/YP/Makefile \
	helpers/basic_auth/getpwnam/Makefile \
	helpers/basic_auth/multi-domain-NTLM/Makefile \
	helpers/basic_auth/SASL/Makefile \
	helpers/basic_auth/POP3/Makefile \
	helpers/basic_auth/DB/Makefile \
	helpers/basic_auth/squid_radius_auth/Makefile \
	helpers/digest_auth/Makefile \
	helpers/digest_auth/password/Makefile \
	helpers/digest_auth/ldap/Makefile \
	helpers/digest_auth/eDirectory/Makefile \
	helpers/ntlm_auth/Makefile \
	helpers/ntlm_auth/fakeauth/Makefile \
	helpers/ntlm_auth/no_check/Makefile \
	helpers/ntlm_auth/SMB/Makefile \
	helpers/ntlm_auth/SMB/smbval/Makefile \
	helpers/ntlm_auth/mswin_sspi/Makefile \
	helpers/negotiate_auth/Makefile \
	helpers/negotiate_auth/mswin_sspi/Makefile \
	helpers/negotiate_auth/squid_kerb_auth/Makefile \
	helpers/external_acl/Makefile \
	helpers/external_acl/ip_user/Makefile \
	helpers/external_acl/ldap_group/Makefile \
	helpers/external_acl/session/Makefile \
	helpers/external_acl/unix_group/Makefile \
	helpers/external_acl/wbinfo_group/Makefile \
	helpers/external_acl/mswin_ad_group/Makefile \
	helpers/external_acl/mswin_lm_group/Makefile \
	tools/Makefile
])

AC_CONFIG_SUBDIRS(lib/libTrie)

# must configure libltdl subdir unconditionally for "make distcheck" to work
AC_CONFIG_SUBDIRS(lib/libLtdl)


AC_OUTPUT