Fixed assertion failures in the authentication framework after the latest

[thirdparty/squid.git] / configure.in

dnl  Configuration input file for Squid
dnl
dnl  Duane Wessels, wessels@nlanr.net, February 1996 (autoconf v2.9)
dnl
dnl  $Id: configure.in,v 1.384 2005/08/28 10:45:32 serassio Exp $
dnl
dnl
dnl
AC_INIT
AC_PREREQ(2.52)
AC_CONFIG_SRCDIR([src/main.cc])
AC_CONFIG_AUX_DIR(cfgaux)
AM_INIT_AUTOMAKE(squid, 3.0-PRE3-CVS)
AM_CONFIG_HEADER(include/autoconf.h)
AC_REVISION($Revision: 1.384 $)dnl
AC_PREFIX_DEFAULT(/usr/local/squid)
AM_MAINTAINER_MODE

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

PRESET_CFLAGS="$CFLAGS"

dnl Check for GNU cc
AC_PROG_CC
AC_LANG_C
AC_PROG_CXX
AM_PROG_CC_C_O
AC_CANONICAL_HOST
AC_DISABLE_SHARED
AC_PROG_LIBTOOL
AC_LTDL_DLLIB
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
        ;;
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_DEFINE_UNQUOTED(CACHE_ICP_PORT, $CACHE_ICP_PORT,
[What default UDP port to use for ICP listening?])

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])

dnl Check for GNU cc
AC_PROG_CC

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 $CFLAGS | sed -e 's/-O[0-9]/-O/'`
            ;;
        *)
            CFLAGS="$CFLAGS -Wall"
            ;;
        esac
    else
        case "$host" in
        *mips-sgi-irix6.*)
            # suggested by Rafael Seidl <rafaels@cthulhu.engr.sgi.com>
            CFLAGS="$CFLAGS -n32 -mips3 -O3 -OPT:Olimit=0:space=OFF \
                -woff 1009,1014,1110,1116,1185,1188,1204,1230,1233 \
                -Wl,-woff,85,-woff,84,-woff,134 \
                -nostdinc -I/usr/include -D_BSD_SIGNALS"
            ;;
        alpha-dec-osf4.*)
            # Mogul says DEC compilers take both -g and -O2
            CFLAGS=`echo $CFLAGS | sed -e 's/-g/-g3/'`
            CFLAGS="$CFLAGS -O2"
            ;;
        *)
            ;;
        esac
    fi
fi

dnl set squid required flags
if test "$GCC" = "yes"; then
  SQUID_CFLAGS="-Werror -Wall -Wpointer-arith -Wwrite-strings -Wmissing-prototypes -Wmissing-declarations -Wcomments"
  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 "$host" in
        *)
            # nothing
            ;;
        esac
    else
        case "$host" in
        *mips-sgi-irix6.*)
            # suggested by Rafael Seidl <rafaels@cthulhu.engr.sgi.com>
            LDFLAGS="-n32 -mips3 -nostdlib -L/usr/lib32"
            ;;
        esac
    fi
fi

dnl Enable optional modules
AC_ARG_ENABLE(dlmalloc,
[  --enable-dlmalloc[=LIB] Compile & use the malloc package by Doug Lea],
[
 case "$enableval" in
 'yes')
    use_dlmalloc="yes"
    LIBDLMALLOC="libdlmalloc.a"
    LIB_MALLOC="-L../lib -ldlmalloc"
    echo "dlmalloc enabled"
    ;;
 'no')
    use_dlmalloc="no"
    echo "dlmalloc disabled"
    ;;
 *) use_dlmalloc="yes"
    LIB_MALLOC="$enableval"
    echo "dlmalloc enabled with $LIB_MALLOC"
 esac
])
if test "${use_dlmalloc-unset}" = unset; then
    case "$host" in
        i386-*-solaris2.*)
                echo "Enabling dlmalloc for $host"
                use_dlmalloc="yes"
                LIBDLMALLOC="libdlmalloc.a"
                LIB_MALLOC="-L../lib -ldlmalloc"
                ;;
        *-sgi-irix*)
                echo "Enabling dlmalloc for $host"
                use_dlmalloc="yes"
                LIBDLMALLOC="libdlmalloc.a"
                LIB_MALLOC="-L../lib -ldlmalloc"
                ;;
    esac
fi
if test "x$ac_cv_enabled_dlmalloc" = "xyes"; then
    # Ok. dlmalloc was enabled before, but state may be changed.
    # we have to test these again
    unset ac_cv_func_mallinfo
    unset ac_cv_func_mallocblksize
    unset ac_cv_func_free
    unset ac_cv_func_realloc
    unset ac_cv_func_memalign
    unset ac_cv_func_valloc
    unset ac_cv_func_pvalloc
    unset ac_cv_func_calloc
    unset ac_cv_func_cfree
    unset ac_cv_func_malloc_trim
    unset ac_cv_func_malloc_usable_size
    unset ac_cv_func_malloc_stats
    unset ac_cv_func_mallinfo
    unset ac_cv_func_mallopt
    unset ac_cv_lib_gnumalloc
    unset ac_cv_header_gnumalloc_h
    unset ac_cv_lib_malloc
    unset ac_cv_enabled_dlmalloc
fi
if test "$use_dlmalloc" = yes; then
    ac_cv_func_mallinfo="yes"
    ac_cv_func_mallocblksize="no"
    ac_cv_func_free="yes"
    ac_cv_func_realloc="yes"
    ac_cv_func_memalign="yes"
    ac_cv_func_valloc="yes"
    ac_cv_func_pvalloc="yes"
    ac_cv_func_calloc="yes"
    ac_cv_func_cfree="yes"
    ac_cv_func_malloc_trim="yes"
    ac_cv_func_malloc_usable_size="yes"
    ac_cv_func_malloc_stats="yes"
    ac_cv_func_mallopt="yes"
    ac_cv_lib_gnumalloc="no"
    ac_cv_header_gnumalloc_h="no"
    ac_cv_lib_malloc="no"
    ac_cv_enabled_dlmalloc="yes"
    AC_DEFINE(USE_DLMALLOC, 1, [Compile & use the malloc package by Doug Lea])
fi

AC_SUBST(LIBDLMALLOC)
AC_SUBST(LIB_MALLOC)

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
])

use_carp=1
AC_ARG_ENABLE(carp,
[  --disable-carp           Disable CARP support],
[ if test "$enableval" = "no" ; then
    echo "CARP disabled"
    use_carp=0
  fi
])      
if test $use_carp = 1; then
    AC_DEFINE(USE_CARP, 1, [Cache Array Routing Protocol])
else
    AC_DEFINE(USE_CARP, 1)
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
    ;;
  *)
    echo "ERROR: Invalid --with-aufs-threads argument"
    exit 1
    ;;
  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
            echo "ERROR: storeio $module does not exists"
            exit 1
        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=
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"
        ;;
    ufs)
        UFS_FOUND="true"
    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"
fi
  
AC_SUBST(STORE_OBJS)
AC_SUBST(STORE_LIBS)
AC_SUBST(STORE_LINKOBJS)

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
            echo "ERROR: disk-io $module does not exists"
            exit 1
        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"
dnl we know what is being built. now add dependencies.
for fs in $DISK_MODULES none; do
    case "$fs" in
    DiskThreads)
        if test -z "$with_pthreads"; then
            echo "DiskThreads IO Module used, pthreads support automatically enabled"
            with_pthreads=yes
        fi
        ;;
    AIO)
        if test -z "$with_aio"; then
            echo "Aio IO Module used, aio support automatically enabled"
            with_aio=yes
        fi
        ;;
    esac
done

AC_SUBST(DISK_LIBS)
AC_SUBST(DISK_PROGRAMS)
AC_SUBST(DISK_LINKOBJS)

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
            echo "ERROR: Removal policy $module does not exists"
            exit 1
        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,
    [If you want to use Squid's ICMP features (highly recommended!) then
    define this.  When USE_ICMP is defined, Squid will send ICMP pings
    to origin server sites.  This information is used in numerous ways:
            - Sent in ICP replies so neighbor caches know how close
              you are to the source.
            - For finding the closest instance of a URN.
            - With the 'test_reachability' option.  Squid will return
              ICP_OP_MISS_NOFETCH for sites which it cannot ping.])
    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
])

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.]),
              ac_cv_use_esi=$enableval, ac_cv_use_esi=no)
AC_CACHE_CHECK(whether to enable ESI,ac_cv_use_esi, ac_cv_use_esi=no)
if test "$ac_cv_use_esi" = "yes" ; then
  AC_DEFINE(ESI,1,[Compile the ESI processor and Surrogate header support])
  AM_CONDITIONAL(USE_ESI, true)
  XTRA_LIBS="$XTRA_LIBS -lexpat -lxml2"
else
  AC_DEFINE(ESI,0,[Compile the ESI processor and Surrogate header support])
fi

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])
else
    AC_DEFINE(USE_WCCP, 0)
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
])

AM_CONDITIONAL(USE_SNMP, false)
AC_ARG_ENABLE(snmp,
[  --enable-snmp           Enable SNMP monitoring],
[ if test "$enableval" = "yes" ; then
    echo "SNMP monitoring enabled"
    AC_DEFINE(SQUID_SNMP,1,[Define to enable SNMP monitoring of Squid])
    SNMPLIB='-L../snmplib -lsnmp'
    AM_CONDITIONAL(USE_SNMP, true)
    SNMP_MAKEFILE=./snmplib/Makefile
    makesnmplib=snmplib
  fi
])
AC_SUBST(SNMPLIB)
AC_SUBST(makesnmplib)

AC_ARG_ENABLE(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*)
            ;;
        *-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
])

AM_CONDITIONAL(ENABLE_HTCP, false)
AC_ARG_ENABLE(htcp,
[  --enable-htcp           Enable HTCP protocol],
[ if test "$enableval" = "yes" ; then
    echo "HTCP enabled"
    AC_DEFINE(USE_HTCP,1, [Define this to include code for the Hypertext Cache Protocol (HTCP)])
    AM_CONDITIONAL(ENABLE_HTCP, true)
  fi
])

AM_CONDITIONAL(ENABLE_SSL, false)

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='-lssl -lcrypto -lgdi32'
        ;;
    *)
        SSLLIB='-lssl -lcrypto'
        ;;
    esac
    USE_OPENSSL=1
  fi
])

AM_CONDITIONAL(NEED_OWN_MD5, true)

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 "$USE_OPENSSL"; then
  echo "Using OpenSSL MD5 implementation"
  AC_DEFINE(USE_OPENSSL,1,[Define this to make use of the OpenSSL libraries for MD5 calculation rather than Squid's own MD5 implementation or if building with SSL encryption (USE_SSL)])
  AM_CONDITIONAL(NEED_OWN_MD5, false)
  if test -z "$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 Select Default Error language
AC_ARG_ENABLE(default-err-language,
[  --enable-default-err-language=lang
                          Select default language for Error pages (see
                          errors directory) ],
[
    if test -d $srcdir/errors/$enableval; then
        ERR_DEFAULT_LANGUAGE=$enableval
    else
        echo "ERROR! Unknown language $enableval, see errors/ directory"
        exit 1
    fi
],[ERR_DEFAULT_LANGUAGE="English"])
AC_SUBST(ERR_DEFAULT_LANGUAGE)

dnl Select languages to be installed
AC_ARG_ENABLE(err-languages,
[  --enable-err-languages=\"lang1 lang2..\"
                          Select languages to be installed. (All will be
                          installed by default) ],
[
    for l in $enableval; do
        if test -d $srcdir/errors/$l; then :; else
            echo "ERROR! Unknown language $$l, see errors/"
            exit 1
        fi
    done
    ERR_LANGUAGES=$enableval
],[
    ERR_LANGUAGES=
    for l in $srcdir/errors/*; do
        if test -f $l/ERR_ACCESS_DENIED; then
            ERR_LANGUAGES="$ERR_LANGUAGES `basename $l`"
        fi
    done
])
AC_SUBST(ERR_LANGUAGES)

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

dnl check for netio plugin stuff
dnl Enable poll()
AC_ARG_ENABLE(poll,
[ --enable-poll            Enable poll() support.
  --disable-poll          Disable poll() support. ],

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

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

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

dnl Enable kqueue()
AC_ARG_ENABLE(kqueue,
[ --enable-kqueue          Enable kqueue() support.
  --disable-kqueue        Disable kqueue() support. ],

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

dnl Enable epoll()
AC_ARG_ENABLE(epoll,
[ --enable-epoll          Enable epoll() support.
  --disable-epoll        Disable epoll() support. ],

[
  case "$enableval" in
  yes)
    echo "Forcing epoll() to be enabled"
    ac_cv_func_epoll='yes'
    ;;
  no)
    echo "Forcing epoll() to be disabled"
    ac_cv_func_epoll='no'
  ;;
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 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"
  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"
  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"
  fi
])

dnl Enable Large file support
AC_ARG_ENABLE(large-files,
[  --enable-large-files    Enable support for large files (>2GB). Still
                          experimental.],
[ if test "$enableval" = "yes" ; then
        echo "Large file support enabled"
        SQUID_CFLAGS="$SQUID_CFLAGS -D_FILE_OFFSET_BITS=64"
        SQUID_CXXFLAGS="$SQUID_CXXFLAGS -D_FILE_OFFSET_BITS=64"
  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
])

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

AC_ARG_ENABLE(truncate,
[  --enable-truncate       This uses truncate() instead of unlink() when
                          removing cache files.  Truncate gives a little
                          performance improvement, but may cause problems
                          when used with async I/O.  Truncate uses more
                          filesystem inodes than unlink..],
[ if test "$enableval" = "yes" ; then
    echo "Enabling truncate instead of unlink"
    AC_DEFINE(USE_TRUNCATE,1,[Do we want to use truncate(2) or unlink(2)?])
  fi
])

dnl Disable hostname checks
AC_ARG_ENABLE(hostname-checks,
[  --enable-hostname-checks
                          Tells Squid to rejects any host names with
                          odd characters in their name to conform with
                          internet standards. This was the default in
                          prior Squid versions, but since Squid-3 Squid
                          no longer tries to police the use of DNS],
[ if test "$enableval" = "yes"; then
    echo "Enabling hostname sanity checks"
    AC_DEFINE(CHECK_HOSTNAMES, 1, [Enable hostname sanity checks])
  fi
])

dnl Enable underscore in hostnames
AC_ARG_ENABLE(underscores,
[  --enable-underscores    Squid by default rejects any host names with _
                          in their name to conform with internet standards.
                          If you disagree with this you may allow _ in
                          hostnames by using this switch, provided that
                          the resolver library on the host where Squid runs
                          does not reject _ in hostnames...],
[ if test "$enableval" = "yes" ; then
    echo "Enabling the use of underscores in host names"
    AC_DEFINE(ALLOW_HOSTNAME_UNDERSCORES, 1,[Allow underscores in host names])
  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="basic digest ntlm"
  fi
])
if test -n "$AUTH_MODULES"; then
    for module in $AUTH_MODULES; do
        if test -d $srcdir/src/auth/$module; then
            :
        else
            echo "ERROR: Auth scheme $module does not exists"
            exit 1
        fi
    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'`"
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
BASIC_AUTH_HELPERS=""
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) 
        for dir in $srcdir/helpers/basic_auth/*; do
            helper="`basename $dir`"
            if test -d "$dir" && test "$helper" != CVS; then
                BASIC_AUTH_HELPERS="$BASIC_AUTH_HELPERS $helper"
            fi
        done
        ;;
  no)
        ;;
  *)
        BASIC_AUTH_HELPERS="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
        ;;
  esac
])
if test -n "$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
            echo "ERROR: Basic auth helper $helper does not exists"
            exit 1
        fi
    done
    echo "Basic auth helpers built: $BASIC_AUTH_HELPERS"
fi
AC_SUBST(BASIC_AUTH_HELPERS)

dnl Select ntlm auth helpers to build
NTLM_AUTH_HELPERS=
AC_ARG_ENABLE(ntlm-auth-helpers,
[  --enable-ntlm-auth-helpers=\"list of helpers\"
                          This option selects which proxy_auth ntlm helpers
                          to build and install as part of the normal build 
                          process. For a list of available helpers see
                          the helpers/ntlm_auth directory.],
[ case "$enableval" in
  yes) 
        for dir in $srcdir/helpers/ntlm_auth/*; do
            helper="`basename $dir`"
            if test -d "$dir" && test "$helper" != CVS; then
                NTLM_AUTH_HELPERS="$NTLM_AUTH_HELPERS $helper"
            fi
        done
        ;;
  no)
        ;;
  *)
        NTLM_AUTH_HELPERS="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
        ;;
  esac
])
if test -n "$NTLM_AUTH_HELPERS"; then
    for helper in $NTLM_AUTH_HELPERS; do
        if test -d $srcdir/helpers/ntlm_auth/$helper; then
            :
        else
            echo "ERROR: NTLM Auth helper $helper does not exists"
            exit 1
        fi
    done
    echo "NTLM auth helpers built: $NTLM_AUTH_HELPERS"
fi
AC_SUBST(NTLM_AUTH_HELPERS)

dnl Select digest auth scheme helpers to build
DIGEST_AUTH_HELPERS=
AC_ARG_ENABLE(digest-auth-helpers,
[  --enable-digest-auth-helpers=\"list of helpers\"
                          This option selects which digest scheme authentication
                          helpers to build and install as part of the normal build
                          process. For a list of available helpers see the
                          helpers/digest_auth directory.],
[ case "$enableval" in
  yes)
        for dir in $srcdir/helpers/digest_auth/*; do
            helper="`basename $dir`"
            if test -d "$dir" && test "$helper" != CVS; then
                DIGEST_AUTH_HELPERS="$DIGEST_AUTH_HELPERS $helper"
            fi
        done
        ;;
  no)
        ;;
  *)
        DIGEST_AUTH_HELPERS="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
        ;;
  esac
])
if test -n "$DIGEST_AUTH_HELPERS"; then
    for helper in $DIGEST_AUTH_HELPERS; do
        if test -f $srcdir/helpers/digest_auth/$helper/Makefile.in; then
                :
        else
                echo "ERROR: digest auth helper $helper does not exists"
                exit 1
        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=
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)
        for dir in $srcdir/helpers/external_acl/*; do
            helper="`basename $dir`"
            if test -d "$dir" && test "$helper" != CVS; then
                EXTERNAL_ACL_HELPERS="$EXTERNAL_ACL_HELPERS $helper"
            fi
        done
        ;;
  no)
        ;;
  *)
        EXTERNAL_ACL_HELPERS="`echo $enableval| sed -e 's/,/ /g;s/  */ /g'`"
        ;;
  esac
])
if test -n "$EXTERNAL_ACL_HELPERS"; then
    for helper in $EXTERNAL_ACL_HELPERS; do
        if test -f $srcdir/helpers/external_acl/$helper/Makefile.in; then
                :
        else
                echo "ERROR: external acl helper $helper does not exists"
                exit 1
        fi
    done
    echo "External acl helpers built: $EXTERNAL_ACL_HELPERS"
fi
AC_SUBST(EXTERNAL_ACL_HELPERS)

dnl Disable "memPools" code
AC_DEFINE(DISABLE_POOLS, 0, [Define if you have problems with memPools and want to disable Pools.])
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])
  fi
])

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
                        echo "ERROR: Neither SASL nor SASL2 found"
                        exit 1
                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
])

AC_ARG_WITH(filedescriptors,
[  --with-filedescriptors=NUMBER Force squid to support NUMBER filedescriptors],
[ squid_filedescriptors_num=$withval ])

# FIXME, try linking in a test program first, then if that fails try probing etc.
SQUID_CPPUNIT_DIR='cppunit-1.10.0'
SQUID_CPPUNIT_LA='$(top_builddir)/lib/cppunit-1.10.0/src/cppunit/libcppunit.la' 
SQUID_CPPUNIT_INC='-I$(top_builddir)/lib/cppunit-1.10.0/include -I $(top_srcdir)/lib/cppunit-1.10.0/include'
if test -f /usr/include/cppunit/TestCase.h; then
  echo "using system installed cppunit"
  SQUID_CPPUNIT_DIR=''
  SQUID_CPPUNIT_LA='/usr/lib/libcppunit.la'
  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. (defaults to use internal copies -
                          version 1.10.0)
                          ],
[ if test -f $withval/include/cppunit/TestCase.h; then
        echo "Using cppunit includes from $withval"
        SQUID_CPPUNIT_INC="-I${withval}/include"
    else
        echo "ERROR: Cannot find cppunit at $withval"
        exit 1
    fi
  if test -f $withval/lib/libcppunit.la; then
        echo "Using cppunit lib from $withval"
        SQUID_CPPUNIT_LA="-I${withval}/lib/libcppunit.la"
    else
        echo "ERROR: Cannot find cppunit at $withval"
        exit 1
    fi
  SQUID_CPPUNIT_DIR=''
])
AC_SUBST(SQUID_CPPUNIT_LA)
AC_SUBST(SQUID_CPPUNIT_INC)
AC_SUBST(SQUID_CPPUNIT_DIR)

# 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 \
        gnumalloc.h \
        grp.h \
        ip_compat.h \
        ip_fil_compat.h \
        ip_fil.h \
        ip_nat.h \
        libc.h \
        limits.h \
        malloc.h \
        math.h \
        memory.h \
        mount.h \
        net/pfvar.h \
        netdb.h \
        netinet/in.h \
        netinet/tcp.h \
        netinet/ip_fil_compat.h \
        openssl/err.h \
        openssl/md5.h \
        openssl/ssl.h \
        openssl/engine.h \
        poll.h \
        pwd.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/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
)

AC_CHECK_HEADERS(linux/netfilter_ipv4.h,,,
SQUID_DEFAULT_INCLUDES
#if HAVE_LIMITS_H
#include <limits.h>
#endif
)

AC_CHECK_HEADERS(net/if.h \
        netinet/if_ether.h\
        netinet/ip_compat.h\
        netinet/ip_fil.h\
        netinet/ip_nat.h\
        sys/mount.h\
        resolv.h,,,SQUID_BSDNET_INCLUDES)

AC_C_CONST
AC_C_BIGENDIAN

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

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])

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])

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 16 bit integers - int16_t and u_int16_t
dnl if this is defined we trust it to be 16 bits
AC_CHECK_TYPE(int16_t,
  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_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_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_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_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_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_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_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_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_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)
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)
    ;;
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

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

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

dnl Check for libcrypt
dnl 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"])
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 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 $LIBS | sed -e s/-lbsd//`
                case "$host" in
dnl From: mlaster@metavillage.com (Mike Laster)
dnl AIX 4.1.4.x does not have header files for snprintf/vsnprintf
dnl So using the internal versions generates a load of warnings
dnl during compile.
                        *-ibm-aix4*)
                                echo "disabling snprintf/vsnprintf for $host"
                                ac_cv_func_snprintf=no
                                ac_cv_func_vsnprintf=no
                        ;;
                esac
                ;;
        *m88k*)
                SQUID_CFLAGS="$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 Check for library functions
AC_CHECK_FUNCS(\
        backtrace_symbols_fd \
        bcopy \
        bswap_16 \
        bswap_32 \
        bswap16 \
        bswap32 \
        crypt \
        fchmod \
        getdtablesize \
        getpagesize \
        getpass \
        getrlimit \
        getrusage \
        getspnam \
        htobe16 \
        htole16 \
        lrand48 \
        mallinfo \
        mallocblksize \
        mallopt \
        memcpy \
        memmove \
        memset \
        mkstemp \
        mktime \
        mstats \
        poll \
        pthread_attr_setschedparam \
        pthread_attr_setscope \
        pthread_setschedparam \
        pthread_sigmask \
        putenv \
        random \
        regcomp \
        regexec \
        regfree \
        res_init \
        rint \
        sbrk \
        select \
        seteuid \
        setgroups \
        setpgrp \
        setrlimit \
        setsid \
        sigaction \
        snprintf \
        socketpair \
        srand48 \
        srandom \
        statfs \
        sysconf \
        syslog \
        timegm \
        vsnprintf \
)

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 "$ac_cv_func_kqueue" = "yes" ; then
        SELECT_TYPE="kqueue"
        AC_DEFINE(USE_KQUEUE,1,[Use kqueue() for the IO loop])
elif test "$ac_cv_func_epoll" = "yes" ; then
        SELECT_TYPE="epoll"
        AC_DEFINE(USE_EPOLL,1,[Use epoll() for the IO loop])
        AC_CHECK_LIB(epoll, epoll_create, [EPOLL_LIBS="-lepoll"])
        AC_SUBST(EPOLL_LIBS)
elif test "$ac_cv_func_poll" = "yes" ; then
        SELECT_TYPE="poll"
        AC_DEFINE(USE_POLL,1,[Use poll() for the IO loop])
elif test "$ac_cv_func_select" = "yes" ; then
        SELECT_TYPE="select"
        AC_DEFINE(USE_SELECT,1,[Use select() for the IO loop])
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 select loop."


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

AM_CONDITIONAL(NEED_OWN_SNPRINTF, false)
if test "$ac_cv_func_snprintf" = "no" || test "$ac_cv_func_vsnprintf" = "no" ; then
  AM_CONDITIONAL(NEED_OWN_SNPRINTF, 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 Proxy support WILL NOT be enabled"
    sleep 10
fi

if test -z "$USE_GNUREGEX" ; then
    case "$host" in
    *-sun-solaris2.[[0-4]])
          USE_GNUREGEX="yes"
          ;;
    *-next-nextstep*)
          USE_GNUREGEX="yes"
          ;;
    esac
fi
AC_MSG_CHECKING(if GNUregex needs to be compiled)
if test -z "$USE_GNUREGEX"; then
if test "$ac_cv_func_regcomp" = "no" || test "$USE_GNUREGEX" = "yes" ; then
        USE_GNUREGEX="yes"
else
        AC_TRY_COMPILE([#include <sys/types.h>
#include <regex.h>],[regex_t t; regcomp(&t,"",0);],
                USE_GNUREGEX="no",
                USE_GNUREGEX="yes")
fi
fi
AC_MSG_RESULT($USE_GNUREGEX)
if test "$USE_GNUREGEX" = "yes"; then
        REGEXLIB="-lregex"
        LIBREGEX="libregex.a"
        AC_DEFINE(USE_GNUREGEX,1,[Define if we should use GNU regex])
fi
AC_SUBST(REGEXLIB)
AC_SUBST(LIBREGEX)

AC_REPLACE_FUNCS(\
        drand48 \
        tempnam \
        strerror \
    initgroups
)

dnl Not cached since people are likely to tune this
AC_MSG_CHECKING(Default FD_SETSIZE value)
AC_TRY_RUN([
#if HAVE_STDIO_H
#include <stdio.h>
#endif
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
main() {
        FILE *fp = fopen("conftestval", "w");
        fprintf (fp, "%d\n", FD_SETSIZE);
        exit(0);
}
],
DEFAULT_FD_SETSIZE=`cat conftestval`,
DEFAULT_FD_SETSIZE=256,
DEFAULT_FD_SETSIZE=256)
AC_MSG_RESULT($DEFAULT_FD_SETSIZE)
AC_DEFINE_UNQUOTED(DEFAULT_FD_SETSIZE, $DEFAULT_FD_SETSIZE, [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().
if test -n "$squid_filedescriptors_num" ; then
  SQUID_MAXFD=$squid_filedescriptors_num
  AC_MSG_RESULT($SQUID_MAXFD (user-forced))
else
  TLDFLAGS="$LDFLAGS"
  case $host in
  i386-unknown-freebsd*)
      if echo "$LDFLAGS" | grep -q pthread; then
        LDFLAGS=`echo $LDFLAGS | sed -e "s/-pthread//"`
      fi
  esac
  AC_TRY_RUN([
#include <stdio.h>
#include <unistd.h>
#include <sys/time.h>   /* needed on FreeBSD */
#include <sys/param.h>
#include <sys/resource.h>
main() {
        FILE *fp;
        int i,j;
#if defined(__CYGWIN32__) || defined (__CYGWIN__)
    /* getrlimit and sysconf returns bogous values on cygwin32.
     * Number of fds is virtually unlimited in cygwin (sys/param.h)
     * __CYGWIN32__ is deprecated.
     */
    i = NOFILE;
#else
#if HAVE_SETRLIMIT
    struct rlimit rl;
#if defined(RLIMIT_NOFILE)
    if (getrlimit(RLIMIT_NOFILE, &rl) < 0) {
        perror("getrlimit: RLIMIT_NOFILE");
    } else {
        rl.rlim_cur = rl.rlim_max;      /* set it to the max */
        if (setrlimit(RLIMIT_NOFILE, &rl) < 0) {
            perror("setrlimit: RLIMIT_NOFILE");
        }
    }
#elif defined(RLIMIT_OFILE)
    if (getrlimit(RLIMIT_OFILE, &rl) < 0) {
        perror("getrlimit: RLIMIT_OFILE");
    } else {
        rl.rlim_cur = rl.rlim_max;      /* set it to the max */
        if (setrlimit(RLIMIT_OFILE, &rl) < 0) {
            perror("setrlimit: RLIMIT_OFILE");
        }
    }
#endif /* RLIMIT_NOFILE */
#endif /* HAVE_SETRLIMIT */
        /* by starting at 2^14, we will never get higher
        than 2^15 for SQUID_MAXFD */
        i = j = 1<<14;
        while (j) {
                j >>= 1;
                if (dup2(0, i) < 0) { 
                        i -= j;
                } else {
                        close(i);
                        i += j;
                }
        }
        i++;
#endif /* IF !DEF CYGWIN */
        fp = fopen("conftestval", "w");
        fprintf (fp, "%d\n", i & ~0x3F);
        exit(0);
}
  ],
  SQUID_MAXFD=`cat conftestval`,
  SQUID_MAXFD=256,
  SQUID_MAXFD=256)
  dnl Microsoft MSVCRT.DLL supports 2048 maximum FDs
  case "$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>
#include <sys/socket.h>
#include <netinet/in.h>
main ()
{
        FILE *fp;
        int fd,val=0,len=sizeof(int);
        if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) exit(1);
        if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &val, &len) < 0) exit(1);
        if (val<=0) exit(1);
        fp = fopen("conftestval", "w");
        fprintf (fp, "%d\n", val);
        exit(0);
}
],
SQUID_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>
#include <sys/socket.h>
#include <netinet/in.h>
main ()
{
        FILE *fp;
        int fd,val=0,len=sizeof(int);
        if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) exit(1);
        if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &val, &len) < 0) exit(1);
        if (val <= 0) exit(1);
        fp = fopen("conftestval", "w"); 
        fprintf (fp, "%d\n", val);
        exit(0);
}
],
SQUID_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>
#include <sys/socket.h>
#include <netinet/in.h>
main ()
{
        FILE *fp;
        int fd,val=0,len=sizeof(int);
        if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) exit(1);
        if (getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &val, &len) < 0) exit(1);
        if (val <= 0) exit(1);
        fp = fopen("conftestval", "w"); 
        fprintf (fp, "%d\n", val);
        exit(0);
}
],
SQUID_TCP_SO_SNDBUF=`cat conftestval`,
SQUID_TCP_SO_SNDBUF=16384,
SQUID_TCP_SO_SNDBUF=16384)
AC_MSG_RESULT($SQUID_TCP_SO_SNDBUF)
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>
#include <sys/socket.h>
#include <netinet/in.h>
main ()
{
        FILE *fp;
        int fd,val=0,len=sizeof(int);
        if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) exit(1);
        if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &val, &len) < 0) exit(1);
        if (val <= 0) exit(1);
        fp = fopen("conftestval", "w"); 
        fprintf (fp, "%d\n", val);
        exit(0);
}
],
SQUID_TCP_SO_RCVBUF=`cat conftestval`,
SQUID_TCP_SO_RCVBUF=16384,
SQUID_TCP_SO_RCVBUF=16384)
AC_MSG_RESULT($SQUID_TCP_SO_RCVBUF)
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

AC_CACHE_CHECK(for _res.nsaddr_list, ac_cv_have_res_nsaddr_list,
AC_TRY_COMPILE([
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#if HAVE_ARPA_NAMESER_H
#include <arpa/nameser.h>
#endif
#if HAVE_RESOLV_H
#include <resolv.h>
#endif
],
[_res.nsaddr_list[[0]];],
ac_cv_have_res_nsaddr_list="yes",
ac_cv_have_res_nsaddr_list="no"))
if test $ac_cv_have_res_nsaddr_list = "yes" ; then
  AC_DEFINE(HAVE_RES_NSADDR_LIST,1,[If _res structure has nsaddr_list member])
fi

if test $ac_cv_have_res_nsaddr_list = "no" ; then
AC_CACHE_CHECK(for _res.ns_list, ac_cv_have_res_ns_list,
AC_TRY_COMPILE([
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#if HAVE_ARPA_NAMESER_H
#include <arpa/nameser.h>
#endif
#if HAVE_RESOLV_H
#include <resolv.h>
#endif
],
[_res.ns_list[[0]].addr;],
ac_cv_have_res_ns_list="yes",
ac_cv_have_res_ns_list="no"))
if test $ac_cv_have_res_ns_list = "yes" ; then
  AC_DEFINE(HAVE_RES_NS_LIST,1,[If _res structure has ns_list member])
fi
fi

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

AC_SUBST(XTRA_OBJS)

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

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

AC_CONFIG_FILES([\
        Makefile \
        lib/Makefile \
        scripts/Makefile \
        scripts/RunCache \
        scripts/RunAccel \
        src/Makefile \
        src/fs/Makefile \
        src/repl/Makefile \
        src/auth/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/YP/Makefile \
        helpers/basic_auth/getpwnam/Makefile \
        helpers/basic_auth/multi-domain-NTLM/Makefile \
        helpers/basic_auth/SASL/Makefile \
        helpers/digest_auth/Makefile \
        helpers/digest_auth/password/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/external_acl/Makefile \
        helpers/external_acl/ip_user/Makefile \
        helpers/external_acl/ldap_group/Makefile \
        helpers/external_acl/unix_group/Makefile \
        helpers/external_acl/wbinfo_group/Makefile
])

AC_CONFIG_SUBDIRS(lib/libTrie)
AC_CONFIG_SUBDIRS(lib/cppunit-1.10.0)

AC_OUTPUT