#
#  configure.in.pre
#
#  Author: Pekka Riikonen <priikone@silcnet.org>
#
#  Copyright (C) 2000 - 2002 Pekka Riikonen
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#

AC_INIT(includes/silcversion.h)

# Put here any platform specific stuff
#
AC_CANONICAL_SYSTEM
case "$target" in
  *-*-freebsd*)
    check_threads=true
    ;;
  *-*-*bsd*)
    check_threads=false
    ;;
  *)
    check_threads=true
    ;;
esac

# ./prepare script will automatically put the correct version. Do not edit!
#
AM_INIT_AUTOMAKE(SILC_PACKAGE, SILC_VERSION)
AC_PREREQ(2.52)
AC_CONFIG_HEADERS(includes/silcdefs.h)

AC_PROG_CC
AC_C_INLINE
AC_C_CONST

AC_PROG_LN_S
AC_SUBST(LN_S)

# Distribution definition. ./prepare will automatically add here a correct
# value. Do not edit!
#
silc_dist=SILC_PACKAGE
SILC_DIST_SUBDIRS="SILC_DISTRIBUTION_SUBDIRS"
AC_DEFINE(SILC_DIST_DEFINE)

# XXX
# Compiler flags
#
if test "$GCC"; then
  CFLAGS="-Wall -finline-functions $CFLAGS"
fi

# Program checking
#
AC_PROG_INSTALL
AC_PROG_RANLIB
AC_PROG_MAKE_SET
AC_PROG_LIBTOOL
AC_PATH_PROG(sedpath, sed)

# Header checking
#
AC_HEADER_STDC
AC_HEADER_TIME
AC_HEADER_STAT

# More header checking
#
AC_CHECK_HEADERS(unistd.h string.h getopt.h errno.h fcntl.h assert.h)
AC_CHECK_HEADERS(sys/types.h sys/stat.h sys/time.h stddef.h)
AC_CHECK_HEADERS(netinet/in.h netinet/tcp.h xti.h netdb.h)
AC_CHECK_HEADERS(pwd.h grp.h termcap.h paths.h)
AC_CHECK_HEADERS(ncurses.h signal.h ctype.h utime.h)
AC_CHECK_HEADERS(arpa/inet.h sys/mman.h limits.h termios.h locale.h langinfo.h)

# Data type checking
#
AC_TYPE_SIGNAL
AC_TYPE_SIZE_T
AC_TYPE_MODE_T
AC_TYPE_UID_T
AC_TYPE_PID_T

AC_CHECK_SIZEOF(long long, 0)
AC_DEFINE_UNQUOTED(SILC_SIZEOF_LONG_LONG, $ac_cv_sizeof_long_long)
AC_CHECK_SIZEOF(long, 0)
AC_DEFINE_UNQUOTED(SILC_SIZEOF_LONG, $ac_cv_sizeof_long)
AC_CHECK_SIZEOF(int, 0)
AC_DEFINE_UNQUOTED(SILC_SIZEOF_INT, $ac_cv_sizeof_int)
AC_CHECK_SIZEOF(short, 0)
AC_DEFINE_UNQUOTED(SILC_SIZEOF_SHORT, $ac_cv_sizeof_short)
AC_CHECK_SIZEOF(char, 0)
AC_DEFINE_UNQUOTED(SILC_SIZEOF_CHAR, $ac_cv_sizeof_char)
AC_CHECK_SIZEOF(void *, 0)
AC_DEFINE_UNQUOTED(SILC_SIZEOF_VOID_P, $ac_cv_sizeof_void_p)

# Function and library checking
#
AC_CHECK_FUNC(gethostbyname, [],
  [
    AC_CHECK_LIB(nsl, gethostbyname, LIBS="$LIBS -lnsl")
    AC_CHECK_FUNC(res_gethostbyname, [],
       AC_CHECK_LIB(resolv, res_gethostbyname, LIBS="$LIBS -lresolv")
    )
  ])
AC_CHECK_FUNC(socket, [],
  AC_CHECK_LIB(socket, socket, LIBS="$LIBS -lsocket")
)
AC_CHECK_FUNCS(gethostname gethostbyaddr getservbyname getservbyport)
AC_CHECK_FUNCS(select listen bind shutdown close connect setsockopt)
AC_CHECK_FUNCS(time ctime utime gettimeofday)
AC_CHECK_FUNCS(chmod fcntl stat fstat getenv putenv strerror)
AC_CHECK_FUNCS(getpid getgid getsid getpgid getpgrp getuid)
AC_CHECK_FUNCS(setgroups initgroups nl_langinfo)
AC_CHECK_FUNCS(strchr strstr strcpy strncpy memcpy memset memmove)

# SIM support checking
# XXX These needs to be changed as more supported platforms appear.
# XXX This probably needs to be made platform dependant check.
#
sim_support=false
AC_MSG_CHECKING(for SIM support)
AC_MSG_RESULT()
AC_CHECK_HEADERS(dlfcn.h,
  AC_CHECK_LIB(dl, dlopen,
    [
      AC_DEFINE(SILC_SIM)
      sim_support=true
      LIBS="$LIBS -ldl"
    ],
    [
      AC_CHECK_LIB(c, dlopen,
        [
          AC_DEFINE(SILC_SIM)
          sim_support=true
        ])
    ])
  )

AM_CONDITIONAL(SILC_SIM, test x$sim_support = xtrue)
if test x$sim_support = xtrue; then
  AC_MSG_RESULT(Enabled SIM support.)
else
  AC_MSG_RESULT(No SIM support found.)
fi

# lib/contrib conditionals
#
AC_CHECK_HEADER(regex.h, have_regex=1, have_regex=0)
AM_CONDITIONAL(HAVE_REGEX, test x$have_regex = x1)
AC_CHECK_FUNC(getopt_long, have_getopt_long=1, have_getopt_long=0)
AM_CONDITIONAL(HAVE_GETOPT_LONG, test x$have_getopt_long = x1)


##
##  Enable/disable checking
##

# IPv6 support
#
AC_MSG_CHECKING(whether to enable IPv6 support)
AC_ARG_ENABLE(ipv6,
  [  --enable-ipv6           enable IPv6 support],
  [
    case "${enableval}" in
      yes)
        want_ipv6=true
        check_ipv6=false
        AC_DEFINE(HAVE_IPV6)
        AC_MSG_RESULT(yes)
        ;;
      *)
        want_ipv6=false
        check_ipv6=false
        AC_MSG_RESULT(no)
        ;;
    esac
  ],
    check_ipv6=true
  )

if test x$check_ipv6 = xtrue; then
  AC_TRY_COMPILE(
    [
      #ifdef HAVE_NETINET_TCP_H
      #include <netinet/tcp.h>
      #endif
      #ifdef HAVE_NETDB_H
      #include <netdb.h>
      #endif
      #include <sys/socket.h>
      #ifdef HAVE_NETDB_IN_H
      #include <netinet/in.h>
      #endif
    ],
    [
      struct sockaddr_in6 sin6;
      int family = AF_INET6;
    ],
    [
      AC_DEFINE(HAVE_IPV6)
      AC_MSG_RESULT(yes)
    ],
      AC_MSG_RESULT(no)
    )
fi

# Debug checking
#
AC_MSG_CHECKING(whether to enable debugging)
AC_ARG_ENABLE(debug,
  [  --enable-debug          enable debugging],
  [
    case "${enableval}" in
      yes)
        AC_MSG_RESULT(yes)
        AC_DEFINE(SILC_DEBUG)
        CFLAGS="-O -g $CFLAGS"
        ;;
      *)
        AC_MSG_RESULT(no)
        CFLAGS="-O2 -g $CFLAGS"
        ;;
    esac
  ],
  [
    CFLAGS="-O2 -g $CFLAGS"
    AC_MSG_RESULT(no)
  ])

# Stack trace checking
#
AC_MSG_CHECKING(whether to enable stack tracing)
AC_ARG_ENABLE(stack-trace,
  [  --enable-stack-trace    enable memory stack trace],
  [
    case "${enableval}" in
    yes)
      AC_MSG_RESULT(yes)
      AC_DEFINE(SILC_STACKTRACE)
      ;;
    *)
      AC_MSG_RESULT(no)
      ;;
    esac
  ],
    AC_MSG_RESULT(no)
  )

# Disable all assembler optimizations
#
AC_MSG_CHECKING(whether to enable assembler optimizations)
AC_ARG_ENABLE(asm,
  [  --disable-asm           do not use assembler optimizations],
  [
    AC_MSG_RESULT(no)
  ],
  [
    AC_MSG_RESULT(yes)
  ])


##
##  Installation
##

# Default installation destination
#
AC_PREFIX_DEFAULT(/usr/local/silc)
if test "x$prefix" != xNONE; then
  silc_prefix="$prefix"
else
  silc_prefix="$ac_default_prefix"
fi

# etc directory
#
if test "x$sysconfdir" != 'x${prefix}/etc'; then
  ETCDIR="$sysconfdir"
else
  ETCDIR="$silc_prefix/etc"
fi

AC_ARG_WITH(etcdir,
  [[  --with-etcdir=DIR       directory for system files [/etc/silc]]],
  [
    case "$withval" in
      no)
        ;;
      *)
        ETCDIR="$withval"
        ;;
    esac
  ])
AC_SUBST(ETCDIR)
AC_DEFINE_UNQUOTED(SILC_ETCDIR, "$ETCDIR")

# help directory
#
HELPDIR="$silc_prefix/help"
AC_ARG_WITH(helpdir,
  [[  --with-helpdir=DIR      directory for SILC help files [PREFIX/help]]],
  [
    case "$withval" in
      no)
        ;;
      *)
       HELPDIR="$withval"
       ;;
    esac
  ])
AC_SUBST(HELPDIR)
AC_DEFINE_UNQUOTED(SILC_HELPDIR, "$HELPDIR")

# doc directory
#
DOCDIR="$silc_prefix/doc"
AC_ARG_WITH(docdir,
  [[  --with-docdir=DIR       directory for SILC documentation [PREFIX/doc]]],
  [
    case "$withval" in
      no)
        ;;
      *)
        DOCDIR="$withval"
        ;;
    esac
  ])
AC_SUBST(DOCDIR)
AC_DEFINE_UNQUOTED(SILC_DOCDIR, "$DOCDIR")

# SIM modules directory
#
MODULESDIR="$silc_prefix/modules"
AC_ARG_WITH(simdir,
  [[  --with-simdir=DIR       directory for SIM modules [PREFIX/modules]]],
  [
    case "$withval" in
      no)
        ;;
      *)
        MODULESDIR="$withval"
        ;;
    esac
  ])
AC_SUBST(MODULESDIR)
AC_DEFINE_UNQUOTED(SILC_MODULESDIR, "$MODULESDIR")

# Logs directory
#
LOGSDIR="$silc_prefix/logs"
AC_ARG_WITH(logsdir,
  [[  --with-logsdir=DIR      directory for SILC Server logs [PREFIX/logs]]],
  [
    case "$withval" in
      no)
        ;;
      *)
        LOGSDIR="$withval"
        ;;
    esac
  ])
AC_SUBST(LOGSDIR)
AC_DEFINE_UNQUOTED(SILC_LOGSDIR, "$LOGSDIR")

# silcd config file checking
#
AC_ARG_WITH(silcd-config-file,
  [[  --with-silcd-config-file=FILE  use FILE as default configuration file
                                 for SILC Server [/etc/silc/silcd.conf]]],
    AC_DEFINE_UNQUOTED(SILC_SERVER_CONFIG_FILE, "$withval")
  )

# silcd pid file checking
#
if test "x$localstatedir" != 'x${prefix}/var'; then
  PIDFILE="$localstatedir/silcd.pid"
else
  PIDFILE="$silc_prefix/var/silcd.pid"
fi

AC_ARG_WITH(silcd-pid-file,
  [[  --with-silcd-pid-file=FILE     use FILE as default pid file for SILC
                                 Server [/var/run/silcd.pid]]],
  [
    case "$withval" in
      no)
        ;;
      *)
        PIDFILE="$withval"
        ;;
    esac
  ])
AC_SUBST(PIDFILE)


##
##  With/without checkings
##

# SOCKS4 support checking
#
AC_MSG_CHECKING(whether to support SOCKS4)
AC_ARG_WITH(socks4,
  [[  --with-socks4[=DIR]     with SOCKS4 support [search in DIR/lib and DIR/include]]],
  [
    case "$withval" in
      no)
        AC_MSG_RESULT(no)
        ;;
      *)
        AC_MSG_RESULT(yes)
        socks=4
    
        if test -d "$withval/include"; then
          CFLAGS="$CFLAGS -I$withval/include"
        else
          CFLAGS="$CFLAGS -I$withval"
        fi
        if test -d "$withval/lib"; then
          withval="-L$withval/lib -lsocks"
        else
          withval="-L$withval -lsocks"
        fi
    
        LIBS="$withval $LIBS"
        AC_TRY_LINK([],
          [
            Rconnect();
          ], [],
          [
            AC_MSG_ERROR(Could not find SOCKS4 library.)
          ])
        ;;
    esac
  ],
    AC_MSG_RESULT(no)
  )

# SOCKS5 support checking
#
AC_MSG_CHECKING(whether to support SOCKS5)
AC_ARG_WITH(socks5,
  [[  --with-socks5[=DIR]     with SOCKS5 support [search in DIR/lib and DIR/include]]],
  [
    case "$withval" in
      no)
        AC_MSG_RESULT(no)
        ;;
      *)
        AC_MSG_RESULT(yes)
        socks=5

        if test -d "$withval/include"; then
          CFLAGS="$CFLAGS -I$withval/include"
        else
          CFLAGS="$CFLAGS -I$withval"
        fi
        if test -d "$withval/lib"; then
          withval="-L$withval/lib -lsocks5"
        else
          withval="-L$withval -lsocks5"
        fi

        LIBS="$withval $LIBS"
        AC_TRY_LINK([],
          [
            SOCKSconnect();
          ], [],
          [
            AC_MSG_ERROR(Could not find SOCKS5 library.)
          ])
        ;;
    esac
  ],
    AC_MSG_RESULT(no)
  )

if test "x$socks" = "x4"; then
  AC_DEFINE(SOCKS)
  CFLAGS="$CFLAGS -Dconnect=Rconnect -Dgetsockname=Rgetsockname -Dbind=Rbind -Daccept=Raccept -Dlisten=Rlisten -Dselect=Rselect"
fi

if test "x$socks" = "x5"; then
  AC_DEFINE(SOCKS)
  AC_DEFINE(SOCKS5)
  AC_DEFINE(Rconnect, SOCKSconnect)
  AC_DEFINE(Rgetsockname, SOCKSgetsockname)
  AC_DEFINE(Rgetpeername, SOCKSgetpeername)
  AC_DEFINE(Rbind, SOCKSbind)
  AC_DEFINE(Raccept, SOCKSaccept)
  AC_DEFINE(Rlisten, SOCKSlisten)
  AC_DEFINE(Rselect, SOCKSselect)
  AC_DEFINE(Rrecvfrom, SOCKSrecvfrom)
  AC_DEFINE(Rsendto, SOCKSsendto)
  AC_DEFINE(Rrecv, SOCKSrecv)
  AC_DEFINE(Rsend, SOCKSsend)
  AC_DEFINE(Rread, SOCKSread)
  AC_DEFINE(Rwrite, SOCKSwrite)
  AC_DEFINE(Rrresvport, SOCKSrresvport)
  AC_DEFINE(Rshutdown, SOCKSshutdown)
  AC_DEFINE(Rlisten, SOCKSlisten)
  AC_DEFINE(Rclose, SOCKSclose)
  AC_DEFINE(Rdup, SOCKSdup)
  AC_DEFINE(Rdup2, SOCKSdup2)
  AC_DEFINE(Rfclose, SOCKSfclose)
  AC_DEFINE(Rgethostbyname, SOCKSgethostbyname)
fi

# MP library checking. First check whether user wants to use GMP and use
# it if found. If not or not defined then compile the MPI library in the
# source tree.
#
mp_gmp=false
AC_MSG_CHECKING(whether to search for GMP)
AC_ARG_WITH(gmp,
  [[  --with-gmp[=DIR]        use GMP instead of MPI [search in DIR/lib and DIR/include]]],
  [
    case "$withval" in
      no)
        AC_MSG_RESULT(no)
        ;;
      *)
        AC_MSG_RESULT(yes)
    
        if test -d "$withval/include"; then
          CFLAGS="$CFLAGS -I$withval/include"
        else
          CFLAGS="$CFLAGS -I$withval"
        fi
        if test -d "$withval/lib"; then
          withval="-L$withval/lib -lgmp"
        else
          withval="-L$withval -lgmp"
        fi
    
        LIBS="$withval $LIBS"
        AC_CHECK_LIB(gmp, __gmpz_init,
          [
            mp_gmp=true
            AC_DEFINE(SILC_MP_GMP)
            AC_MSG_RESULT(Using GMP as a MP library.)
          ])
        ;;
    esac
  ],
    AC_MSG_RESULT(no)
  )

AM_CONDITIONAL(SILC_MP_GMP, test x$mp_gmp = xtrue)
AM_CONDITIONAL(SILC_MP_NSS_MPI, test x$mp_gmp = xfalse)
if test x$mp_gmp = xfalse; then
  AC_DEFINE(SILC_MP_NSS_MPI)
  AC_MSG_RESULT(Using NSS MPI as a MP library.)
fi

# iconv support
#
check_iconv=true
has_iconv=false
AC_MSG_CHECKING(whether to implicit search for libiconv)
AC_ARG_WITH(iconv,
  [[  --with-iconv[=DIR]      use libiconv [search in DIR/include and DIR/lib]]],
  [
    case "${withval}" in
      no)
        AC_MSG_RESULT(no)

        AC_CHECK_HEADERS(iconv.h, AC_CHECK_FUNC(iconv, has_iconv=true))
        check_iconv=false
        ;;
      *)
        AC_MSG_RESULT(yes)

        if test -d $withval/include; then
          CPPFLAGS="$CPPFLAGS -I$withval/include"
          CFLAGS="$CFLAGS -I$withval/include"
        fi
        if test -d $withval/lib; then
          LDFLAGS="$LDFLAGS -L$withval/lib"
        fi
    esac
  ],
  [
    AC_MSG_RESULT(no)

    AC_CHECK_HEADERS(iconv.h, AC_CHECK_FUNCS(iconv,
                                [
                                  has_iconv=true
                                  check_iconv=false
                                 ]))
  ])

if test x$check_iconv = xtrue; then
  AC_MSG_RESULT(starting search...)

  # XXX
  unset ac_cv_header__iconv_h_ ac_cv_header_iconv_h || true

  AC_CHECK_HEADERS(iconv.h,
    [
      LIBS="$LIBS -liconv"
      AC_MSG_CHECKING(for iconv in -liconv)
      AC_TRY_LINK(
        [
          #include <stdlib.h>
          #include <iconv.h>
        ],
        [
          iconv_t cd = iconv_open("", "");
          iconv(cd, NULL, NULL, NULL, NULL);
          iconv_close(cd);
        ],
        [
          echo "yes"
          AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
          has_iconv=true 
          check_iconv=true 
        ])
     ])
fi

if test x$check_iconv = xtrue; then
  # search for iconv library..
  SAVE_CPPFLAGS="$CPPFLAGS"
  SAVE_CFLAGS="$CFLAGS"
  SAVE_LDFLAGS="$LDFLAGS"
    
  for dir in `echo "/usr/local /usr/pkg /usr/contrib"`; do
    if test x$has_iconv = xfalse; then
      AC_MSG_RESULT(searching in $dir...)
    
      CPPFLAGS="$SAVE_CPPFLAGS"
      CFLAGS="$SAVE_CFLAGS"
      LDFLAGS="$SAVE_LDFLAGS"
      
      if test -d $dir/include; then
        CPPFLAGS="$CPPFLAGS -I$dir/include"
        CFLAGS="$CFLAGS -I$dir/include"
      fi
      if test -d $dir/lib; then
        LDFLAGS="$LDFLAGS -L$dir/lib"
      fi
    
      # XXX
      unset ac_cv_header__iconv_h_ ac_cv_header_iconv_h || true
      
      AC_CHECK_HEADERS(iconv.h,
        [
          LIBS="$LIBS -liconv"
          AC_MSG_CHECKING(for iconv in -liconv)
          AC_TRY_LINK(
            [
              #include <stdlib.h>
              #include <iconv.h>
            ],
            [
              iconv_t cd = iconv_open("", "");
              iconv(cd, NULL, NULL, NULL, NULL);
              iconv_close(cd);
            ],
            [
              echo "yes"
              has_iconv=true 
              AC_DEFINE(HAVE_ICONV, 1, [Define if you have the iconv() function.])
            ],
            [
              has_iconv=false
            ])
         ])
      fi
    done
fi

if test x$has_iconv = xtrue; then
  # (1) Some implementations of iconv won't convert from UTF-8 to UTF-8.
  # (2) In glibc-2.1.2 and earlier there is a bug that messes up ob and
  #     obl when args 2 and 3 are 0 (fixed in glibc-2.1.3).
  #
  AC_CACHE_CHECK([whether this iconv is good enough], ac_iconv_good,
    AC_TRY_RUN(
      [
        #include <iconv.h>
        int main() {
          iconv_t cd;
        changequote(, )dnl
          char buf[4];
        changequote([, ])dnl
          char *ob;
          size_t obl;
          ob = buf, obl = sizeof(buf);
          return ((cd = iconv_open("UTF-8", "UTF-8")) != (iconv_t)(-1) &&
                 (iconv(cd, 0, 0, &ob, &obl) ||
                 !(ob == buf && obl == sizeof(buf)) ||
                 iconv_close(cd)));
        }
      ],
      [
        ac_iconv_good=yes
      ],
      [
        ac_iconv_good=no
      ],
      [
        ac_iconv_good=yes
      ])
    )

  if test x$ac_iconv_good = xno; then
    AC_MSG_ERROR(Try using libiconv instead.)
  fi
fi

# POSIX threads support
#
has_threads=false
AC_MSG_CHECKING(whether to search for POSIX threads)
AC_ARG_WITH(pthreads,
  [[  --with-pthreads[=DIR]   use POSIX threads [search in DIR/include and DIR/lib]]],
  [ 
    case "${withval}" in
      no)
        check_threads=false
        ;;
      *)
        if test -d $withval/include; then
          CPPFLAGS="$CPPFLAGS -I$withval/include"
          CFLAGS="$CFLAGS -I$withval/include"
        fi
        if test -d $withval/lib; then
          LDFLAGS="$LDFLAGS -L$withval/lib"
        fi

        check_threads=true
        ;;
    esac
  ])

if test x$check_threads = xtrue; then
  AC_MSG_RESULT(yes)
  AC_CHECK_HEADERS(pthread.h,
    [
      SAVE_LIBS="$LIBS"
      LIBS="$LIBS -lpthread"
      AC_CHECK_LIB(pthread, pthread_attr_init, has_threads=true,
        [
          # FreeBSD
          case "${target}" in
            *-*-freebsd*)
              LIBS="$SAVE_LIBS -pthread"
              AC_CHECK_LIB(c_r, pthread_attr_init, has_threads=true)
              ;;
          esac
        ])
    ],
    [
      # search for pthread library..
      SAVE_CPPFLAGS="$CPPFLAGS"
      SAVE_CFLAGS="$CFLAGS"
      SAVE_LDFLAGS="$LDFLAGS"

      for dir in `echo "/usr/local /usr/pkg /usr/contrib /usr/pkg/pthreads /usr/local/pthreads"`; do
        if test x$has_threads = xfalse; then
          AC_MSG_RESULT(searching in $dir...)
  
          CPPFLAGS="$SAVE_CPPFLAGS"
          CFLAGS="$SAVE_CFLAGS"
          LDFLAGS="$SAVE_LDFLAGS"
  
          if test -d $dir/include; then
            CPPFLAGS="$CPPFLAGS -I$dir/include"
            CFLAGS="$CFLAGS -I$dir/include"
          fi
          if test -d $dir/lib; then
            LDFLAGS="$LDFLAGS -L$dir/lib"
          fi

          # XXX
          unset ac_cv_header__pthread_h_ ac_cv_header_pthread_h || true

          AC_CHECK_HEADERS(pthread.h,
            [ 
              LIBS="$LIBS -lpthread"
              AC_CHECK_LIB(pthread, pthread_attr_init, has_threads=true,
                                                       has_threads=false)
            ])
        fi
      done
    ])
else
  AC_MSG_RESULT(no)
  has_threads=false
fi

AM_CONDITIONAL(SILC_THREADS, test x$has_threads = xtrue)
if test x$has_threads = xtrue; then
  CFLAGS="$CFLAGS -D_REENTRANT"

  # XXX possibly incomplete
  case "${target}" in
    *-*-aix*)
      CFLAGS="$CFLAGS -D_THREAD_SAFE"
      if test x"$GCC" = xyes; then
        CFLAGS="$CFLAGS -mthreads"
      fi
      ;;
    *-*-freebsd*)
      CFLAGS="$CFLAGS -D_THREAD_SAFE"
      ;;
    *-*-sysv5uw7*)  # UnixWare 7
      if test "$GCC" != "yes"; then
        CFLAGS="$CFLAGS -Kthread"
      else
        CFLAGS="$CFLAGS -pthread"
      fi
      ;;
    *-dg-dgux*)  # DG/UX
      CFLAGS="$CFLAGS -D_POSIX4A_DRAFT10_SOURCE"
      ;;
   esac

  AC_CHECK_FUNC(pthread_create)
  AC_DEFINE(SILC_HAVE_PTHREAD)
  AC_DEFINE(SILC_THREADS)
fi

# Native WIN32 compilation under cygwin
#
AC_MSG_CHECKING(whether to compile native WIN32 code)
AC_ARG_WITH(win32,
  [  --with-win32            compile native WIN32 code (-mno-cygwin)],
  [
    AC_MSG_RESULT(yes)
    AC_DEFINE(SILC_WIN32)
    win32_support=true
    CFLAGS="-mno-cygwin $CFLAGS"
    LIBS="$LIBS -lwsock32"
  ],
  [
    AC_MSG_RESULT(no)
  ])
AM_CONDITIONAL(SILC_WIN32, test x$win32_support = xtrue)

# Native EPOC support (disabled by default)
#
AM_CONDITIONAL(SILC_EPOC, test xfalse = xtrue)

# Native BeOS support (disabled by default)
#
AM_CONDITIONAL(SILC_BEOS, test xfalse = xtrue)

# Native OS2 support (disabled by default)
#
AM_CONDITIONAL(SILC_OS2, test xfalse = xtrue)

# --without-irssi
#
without_irssi=false
AC_MSG_CHECKING(whether to compile Irssi SILC Client)
AC_ARG_WITH(irssi,
  [  --without-irssi         compile without Irssi SILC Client],
  [
    AC_MSG_RESULT(no)
    without_irssi=true
    SILC_DIST_SUBDIRS=`echo $SILC_DIST_SUBDIRS | $sedpath -e 's/irssi//'`
  ],
  [
    AC_MSG_RESULT(yes)
  ])

# --without-silcd
#
without_silcd=false
AC_MSG_CHECKING(whether to compile SILC Server)
AC_ARG_WITH(silcd,
  [  --without-silcd         compile without SILC Server],
  [
    AC_MSG_RESULT(no)
    without_silcd=true
    SILC_DIST_SUBDIRS=`echo $SILC_DIST_SUBDIRS | $sedpath -e 's/silcd//'`
  ],
  [
    AC_MSG_RESULT(yes)
  ])


##
##  Misc
##

# Other configure scripts
#
if test x$without_irssi = xfalse; then
  if test "x$silc_dist" = "xsilc-client" ||
     test "x$silc_dist" = "xsilc-toolkit"; then
    AC_CONFIG_SUBDIRS(irssi)
  fi
fi

AC_CONFIG_SUBDIRS(lib/silcmath/mpi)
#AC_CONFIG_SUBDIRS(lib/zlib)

SILC_TOP_SRCDIR=`pwd`
AC_SUBST(SILC_TOP_SRCDIR)
#SILC_INSTALL_PREFIX=$ac_default_prefix
#AC_SUBST(SILC_INSTALL_PREFIX)
AC_SUBST(LIBS)
INCLUDE_DEFINES_INT="include \$(top_srcdir)/Makefile.defines_int"
AC_SUBST(INCLUDE_DEFINES_INT)
AC_SUBST(SILC_DIST_SUBDIRS)

# Makefile outputs
#
AC_CONFIG_FILES(
Makefile
Makefile.defines
Makefile.defines_int
doc/Makefile
includes/Makefile
lib/Makefile
lib/contrib/Makefile
lib/silccore/Makefile
lib/silccrypt/Makefile
lib/silcmath/Makefile
lib/silcmath/mpi/Makefile.defines
lib/silcmath/mpi/Makefile.defines_int
lib/silcsim/Makefile
lib/silcske/Makefile
lib/silcutil/Makefile
lib/silcutil/unix/Makefile
lib/silcutil/win32/Makefile
lib/silcutil/beos/Makefile
lib/silcutil/os2/Makefile
lib/silcutil/epoc/Makefile
lib/silcsftp/Makefile
lib/silcsftp/tests/Makefile
doc/example_silcd.conf
)

if test "x$silc_dist" = "xsilc-client" ||
   test "x$silc_dist" = "xsilc-toolkit"; then
  AC_CONFIG_FILES(lib/silcclient/Makefile)
fi

if test x$without_irssi = xfalse ; then
  if test "x$silc_dist" = "xsilc-client" ||
     test "x$silc_dist" = "xsilc-toolkit"; then
    AC_CONFIG_FILES(
irssi/Makefile.defines
irssi/Makefile.defines_int
)
  fi
fi

if test x$without_silcd = xfalse ; then
  if test "x$silc_dist" = "xsilc-server" ||
     test "x$silc_dist" = "xsilc-toolkit"; then
    AC_CONFIG_FILES(
silcd/Makefile
)
  fi
fi

if test "x$silc_dist" = "xsilc-toolkit"; then
  AC_CONFIG_FILES(
silc/Makefile
win32/Makefile
win32/libsilc/Makefile
win32/libsilcclient/Makefile
)
fi

AC_OUTPUT