#
#  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
  *-*-*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)
AM_CONFIG_HEADER(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
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

# 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 regex.h)
AC_CHECK_HEADERS(arpa/inet.h sys/mman.h limits.h termios.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)

dnl Curses detection: Munged from Midnight Commander's configure.in
AC_DEFUN(AC_CHECK_CURSES,[
	search_ncurses=true
	screen_manager=""
	has_curses=false

	CFLAGS=${CFLAGS--O}

	AC_SUBST(CURSES_LIBS)
	AC_SUBST(CURSES_INCLUDEDIR)

	AC_ARG_WITH(sunos-curses,
	  [  --with-sunos-curses     Used to force SunOS 4.x curses],[
	  if test x$withval = xyes; then
		AC_USE_SUNOS_CURSES
	  fi
	])

	AC_ARG_WITH(osf1-curses,
	  [  --with-osf1-curses      Used to force OSF/1 curses],[
	  if test x$withval = xyes; then
		AC_USE_OSF1_CURSES
	  fi
	])

	AC_ARG_WITH(vcurses,
	  [  --with-vcurses[=incdir] Used to force SysV curses],
	  if test x$withval != xyes; then
		CURSES_INCLUDEDIR="-I$withval"
	  fi
	  AC_USE_SYSV_CURSES
	)

	AC_ARG_WITH(ncurses,
	  [  --with-ncurses[=dir]    Compile with ncurses/locate base dir],
	  if test x$withval = xno ; then
		search_ncurses=false
	  elif test x$withval != xyes ; then
		AC_NCURSES($withval/include, ncurses.h, -L$withval/lib -lncurses, -I$withval/include, "ncurses on $withval/include")
	  fi
	)

	if $search_ncurses
	then
		AC_SEARCH_NCURSES()
	fi
])


AC_DEFUN(AC_USE_SUNOS_CURSES, [
	search_ncurses=false
	screen_manager="SunOS 4.x /usr/5include curses"
	AC_MSG_RESULT(Using SunOS 4.x /usr/5include curses)
	AC_DEFINE(USE_SUNOS_CURSES)
	AC_DEFINE(HAS_CURSES)
	has_curses=true
	AC_DEFINE(NO_COLOR_CURSES)
	AC_DEFINE(USE_SYSV_CURSES)
	CURSES_INCLUDEDIR="-I/usr/5include"
	CURSES_LIBS="/usr/5lib/libcurses.a /usr/5lib/libtermcap.a"
	AC_MSG_RESULT(Please note that some screen refreshs may fail)
])

AC_DEFUN(AC_USE_OSF1_CURSES, [
       AC_MSG_RESULT(Using OSF1 curses)
       search_ncurses=false
       screen_manager="OSF1 curses"
       AC_DEFINE(HAS_CURSES)
       has_curses=true
       AC_DEFINE(NO_COLOR_CURSES)
       AC_DEFINE(USE_SYSV_CURSES)
       CURSES_LIBS="-lcurses"
])

AC_DEFUN(AC_USE_SYSV_CURSES, [
	AC_MSG_RESULT(Using SysV curses)
	AC_DEFINE(HAS_CURSES)
	has_curses=true
	AC_DEFINE(USE_SYSV_CURSES)
	search_ncurses=false
	screen_manager="SysV/curses"
	CURSES_LIBS="-lcurses"
])

dnl
dnl Parameters: directory filename cureses_LIBS curses_INCLUDEDIR nicename
dnl
AC_DEFUN(AC_NCURSES, [
    if $search_ncurses
    then
        if test -f $1/$2
	then
	    AC_MSG_RESULT(Found ncurses on $1/$2)

	    CURSES_LIBS="$3"
	    AC_CHECK_LIB(ncurses, initscr, , [
                CHECKLIBS=`echo "$3"|sed 's/-lncurses/-lcurses/g'`
		AC_CHECK_LIB(curses, initscr, [
			CURSES_LIBS="$CHECKLIBS"
		],, $CHECKLIBS)
	    ], $CURSES_LIBS)
	    CURSES_INCLUDEDIR="$4"
	    search_ncurses=false
	    screen_manager=$5
            AC_DEFINE(HAS_CURSES)
            has_curses=true
	    has_ncurses=true
	    AC_DEFINE(USE_NCURSES)
	fi
    fi
])

AC_DEFUN(AC_SEARCH_NCURSES, [
    AC_CHECKING("location of ncurses.h file")

    AC_NCURSES(/usr/include, ncurses.h, -lncurses,, "ncurses on /usr/include")
    AC_NCURSES(/usr/include/ncurses, ncurses.h, -lncurses, -I/usr/include/ncurses, "ncurses on /usr/include/ncurses")
    AC_NCURSES(/usr/local/include, ncurses.h, -L/usr/local/lib -lncurses, -I/usr/local/include, "ncurses on /usr/local")
    AC_NCURSES(/usr/pkg/include, ncurses.h, -L/usr/pkg/lib -lncurses, -I/usr/pkg/include, "ncurses on /usr/pkg")
    AC_NCURSES(/usr/contrib/include, ncurses.h, -L/usr/contrib/lib -lncurses, -I/usr/contrib/include, "ncurses on /usr/contrib")
    AC_NCURSES(/usr/local/include/ncurses, ncurses.h, -L/usr/local/lib -L/usr/local/lib/ncurses -lncurses, -I/usr/local/include/ncurses, "ncurses on /usr/local/include/ncurses")

    AC_NCURSES(/usr/local/include/ncurses, curses.h, -L/usr/local/lib -lncurses, -I/usr/local/include/ncurses -DRENAMED_NCURSES, "renamed ncurses on /usr/local/.../ncurses")

    AC_NCURSES(/usr/include/ncurses, curses.h, -lncurses, -I/usr/include/ncurses -DRENAMED_NCURSES, "renamed ncurses on /usr/include/ncurses")

    dnl
    dnl We couldn't find ncurses, try SysV curses
    dnl
    if $search_ncurses 
    then
        AC_EGREP_HEADER(init_color, /usr/include/curses.h,
	    AC_USE_SYSV_CURSES)
	AC_EGREP_CPP(USE_NCURSES,[
#include <curses.h>
#ifdef __NCURSES_H
#undef USE_NCURSES
USE_NCURSES
#endif
],[
	CURSES_INCLUDEDIR="$CURSES_INCLUDEDIR -DRENAMED_NCURSES"
        AC_DEFINE(HAS_CURSES)
	has_curses=true
	has_ncurses=true
        AC_DEFINE(USE_NCURSES)
        search_ncurses=false
        screen_manager="ncurses installed as curses"
])
    fi

    dnl
    dnl Try SunOS 4.x /usr/5{lib,include} ncurses
    dnl The flags USE_SUNOS_CURSES, USE_BSD_CURSES and BUGGY_CURSES
    dnl should be replaced by a more fine grained selection routine
    dnl
    if $search_ncurses
    then
	if test -f /usr/5include/curses.h
	then
	    AC_USE_SUNOS_CURSES
        fi
    fi

    dnl use whatever curses there happens to be
    if $search_ncurses
    then
	if test -f /usr/include/curses.h
	then
	  CURSES_LIBS="-lcurses"
	  AC_DEFINE(HAS_CURSES)
	  has_curses=true
	  search_ncurses=false
	  screen_manager="curses"
	fi
    fi
])

AC_CHECK_CURSES
LIBS="$LIBS $CURSES_LIBS"

# Function and library checking
AC_CHECK_FUNC(gethostbyname, ac_gethostbyname_found=1,
ac_gethostbyname_found=0)
if test x$ac_gethostbyname_found = x0; then
    AC_CHECK_LIB(nsl, gethostbyname, LIBS="$LIBS -lnsl")
    AC_CHECK_FUNC(res_gethostbyname, ac_res_ghbn_found=1, ac_res_ghbn_found=0)
    if test x$ac_res_ghbn_found = x0; then
        AC_CHECK_LIB(resolv, res_gethostbyname,  LIBS="$LIBS -lresolv")
    fi
fi
AC_CHECK_FUNC(socket, ac_socket_found=1, ac_socket_found=0)
if test x$ac_socket_found = x0; then
    AC_CHECK_LIB(socket, socket, LIBS="$LIBS -lsocket")
fi
AC_CHECK_FUNCS(gethostname gethostbyaddr getservbyname getservbyport)
AC_CHECK_FUNCS(select listen bind shutdown close connect)
AC_CHECK_FUNCS(fcntl setsockopt)
AC_CHECK_FUNCS(getopt_long time)
AC_CHECK_FUNCS(chmod stat fstat getenv putenv strerror ctime gettimeofday)
AC_CHECK_FUNCS(getpid getgid getsid getpgid getpgrp getuid setgroups initgroups)
AC_CHECK_FUNCS(strchr strstr strcpy strncpy memcpy memset memmove)
AC_CHECK_FUNCS(pthread_create)

# 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
AM_CONDITIONAL(SILC_SIM, test x$sim_support = xtrue)
AC_CHECKING(for SIM support)
AC_CHECK_HEADERS(dlfcn.h, 
  AC_CHECK_LIB(dl, dlopen, 
    AC_DEFINE(SILC_SIM) 
    sim_support=true
    AM_CONDITIONAL(SILC_SIM, test x$sim_support = xtrue)
    AC_MSG_RESULT(enabled SIM support)
    LIBS="$LIBS -ldl",
    AC_MSG_RESULT(no SIM support found)),
  AC_MSG_RESULT(no SIM support found))

#
# 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
#ETCDIR="/etc/silc"
if test "x$sysconfdir" != 'x${prefix}/etc'; then
	ETCDIR="$sysconfdir"
else
	ETCDIR="$silc_prefix/etc"
fi
AC_ARG_WITH(etcdir,
[  --with-etcdir[=PATH]    Directory for system files [/etc/silc]],
[ case "$withval" in
  no)
    ;;
  yes)
    ETCDIR="$withval"
    ;;
  *)
    ETCDIR="$withval"
    ;;
  esac ],
)
AC_SUBST(ETCDIR)
AC_DEFINE_UNQUOTED(SILC_ETCDIR, "$ETCDIR")

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

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

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

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

# SOCKS4 support checking
AC_MSG_CHECKING(whether to support SOCKS4)
AC_ARG_WITH(socks4,
[  --with-socks4[=PATH]    Compile with SOCKS4 support],
[ 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[=PATH]    Compile with SOCKS5 support],
[ 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.
#
AC_MSG_CHECKING(whether to support GMP)
AC_ARG_WITH(gmp,
[  --with-gmp[=PATH]       Compile with GMP support instead of MPI],
[ case "$withval" in
  no)
    AC_MSG_RESULT(no)
    mp_gmp=false
    ;;
  *)
    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"
    mp_gmp=false
    AC_CHECK_LIB(gmp, __gmpz_init,
      mp_gmp=true
      AC_DEFINE(SILC_MP_GMP)
      AC_MSG_RESULT(Using GMP as MP library)
    )
      ;;
  esac ],
  AC_MSG_RESULT(no)
  mp_gmp=false
)

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 MP library)
fi

AC_ARG_WITH(silcd-config-file,
[  --with-silcd-config-file[=PATH]
                          Use PATH as default configuration file in SILC
                          server [/etc/silc/silcd.conf]],
[ AC_DEFINE_UNQUOTED(SILC_SERVER_CONFIG_FILE, "$withval") ])

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[=PATH]
                          Use PATH as default pid file in SILC
                          server [/var/run/silcd.pid]],
[ case "$withval" in
	no)
		;;
	yes)
		PIDFILE="$withval"
		;;
	*)
		PIDFILE="$withval"
		;;
	esac ],
)
AC_SUBST(PIDFILE)

#
# Native WIN32 compilation under cygwin
#
AC_ARG_WITH(win32,
[  --with-win32            Compile native WIN32 code (-mno-cygwin)],
[ AC_DEFINE(SILC_WIN32)
  win32_support=true
  CFLAGS="-mno-cygwin $CFLAGS" 
  LIBS="$LIBS -lwsock32" ])

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)

#
# IPv6 support
#
AC_MSG_CHECKING(for 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(for enabled 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))

#
# Disable all assembler optimizations
#
AC_ARG_ENABLE(asm,
[  --disable-asm           Do not use assembler optimizations ],
[])

#
# Threads support
#
AC_ARG_ENABLE(threads,
[  --disable-threads       Do not compile with multi-thread support],
[ case "${enableval}" in
  yes)
    want_threads=true
    check_threads=true
    ;;
  *)
    want_threads=false
    check_threads=false
    ;;
esac ])

if test x$check_threads = xtrue; then
want_threads=false
AC_CHECK_HEADERS(pthread.h, 
	[ AC_DEFINE(SILC_HAVE_PTHREAD) 
          want_threads=true ],
	[ if test -f /usr/pkg/include/pthread.h ; then
	    AC_DEFINE(SILC_HAVE_PTHREAD)
	    AC_MSG_RESULT(Found pthread.h in /usr/pkg/include/)
	    CFLAGS="$CFLAGS -I/usr/pkg/include"
            want_threads=true
          elif test -f /usr/contrib/include/pthread.h ; then
	    AC_DEFINE(SILC_HAVE_PTHREAD)
	    AC_MSG_RESULT(Found pthread.h in /usr/contrib/include/)
	    CFLAGS="$CFLAGS -I/usr/contrib/include"
            want_threads=true
          fi
	])

AM_CONDITIONAL(SILC_THREADS, test x$want_threads = xtrue)
if test x$want_threads = xtrue; then
  TMP_LIBS="$LIBS"
  LIBS="-lpthread"
  AC_TRY_LINK([#include <pthread.h>],
  	      [pthread_attr_t attr; pthread_attr_init(&attr);], 
  AC_DEFINE(SILC_THREADS),
  LIBS="-L/usr/pkg/lib -lpthread"
  AC_TRY_LINK([#include <pthread.h>],
  	      [pthread_attr_t attr; pthread_attr_init(&attr);],
  AC_DEFINE(SILC_THREADS),
  LIBS="-L/usr/contrib/lib -lpthread"
  AC_TRY_LINK([#include <pthread.h>],
  	      [pthread_attr_t attr; pthread_attr_init(&attr);], 
  AC_DEFINE(SILC_THREADS),
  LIBS=""
  )))

  CFLAGS="$CFLAGS -D_REENTRANT"
  case $host in
    *-aix*)
      CFLAGS="$CFLAGS -D_THREAD_SAFE"
      if test x"$GCC" = xyes; then
        CFLAGS="$CFLAGS -mthreads"  
      fi
      ;;
    *-freebsd2.2*)
      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

  LIBS="$TMP_LIBS $LIBS"
fi
fi

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

#
# 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
irssi/Makefile.defines
irssi/Makefile.defines_int
)
fi

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