#
# configure script for telnet
#
# $Id$
#



AC_INIT(telnet/telnet.c)
AC_CONFIG_HEADER(config.h)

# This may be overridden using --prefix=/usr to configure
AC_PREFIX_DEFAULT(/usr/athena)

# We want these before the checks, so the checks can modify their values.
test -z "$CFLAGS" && CFLAGS=-g auto_cflags=1
test -z "$LDFLAGS" && LDFLAGS=-g

AC_PROG_CC
AC_PROG_RANLIB
AC_PROG_CPP

# If we're using gcc and the user hasn't specified CFLAGS, add -O to CFLAGS.
test -n "$GCC" && test -n "$auto_cflags" && CFLAGS="$CFLAGS -O"

AC_CACHE_VAL(krb_cv_ld_flags,
krb_cv_ld_flags="") dnl
LD_FLAGS=${krb_cv_ld_flags}
AC_SUBST(CFLAGS) dnl
AC_SUBST(LDFLAGS) dnl
AC_SUBST(LD_FLAGS) dnl

AC_PROG_INSTALL

AC_TYPE_SIGNAL

dnl
dnl NEXTSTEP is not posix compliant by default,
dnl you need a switch -posix to the compiler
dnl
AC_MSG_CHECKING(for NEXTSTEP)
AC_CACHE_VAL(krb_cv_sys_nextstep,
AC_EGREP_CPP(yes, 
[#ifdef NeXT
	yes
#endif 
], krb_cv_sys_nextstep=yes, krb_cv_sys_nextstep=no) )
test $krb_cv_sys_nextstep = "yes" && CFLAGS="$CFLAGS -posix"
test $krb_cv_sys_nextstep = "yes" && LIBS="$LIBS -posix"
AC_MSG_RESULT($krb_cv_sys_nextstep)

#
# authentication
#

AC_MSG_CHECKING(for authentication)

AC_ARG_ENABLE(authentication, [  --enable-authentication   configure with authentication],
[
	if test "$enableval" = no; then
		do_authentication=no
	else
		do_authentication=yes
	fi
	unset telnet_cv_opt_authentication
],[
	do_authentication=yes
])

AC_CACHE_VAL(telnet_cv_opt_authentication, 
	telnet_cv_opt_authentication=$do_authentication)

if test "$telnet_cv_opt_authentication" != no; then
	AC_DEFINE(AUTHENTICATION)
	AC_DEFINE(KRB4)
fi

AC_MSG_RESULT($telnet_cv_opt_authentication)

AC_SUBST(AUTHENTICATION)
AC_SUBST(KRB4)

#
# encryption
#


AC_MSG_CHECKING(for encryption)

AC_ARG_ENABLE(encryption, [  --enable-encryption       configure with encryption],
[
	if test "$enableval" = no; then
		do_encryption=no
	else
		do_encryption=yes
	fi
	unset telnet_cv_opt_encryption
],[
	do_encryption=$telnet_cv_opt_authentication
])

AC_CACHE_VAL(telnet_cv_opt_encryption, 
	telnet_cv_opt_encryption=$do_encryption)

if test "$telnet_cv_opt_encryption" != no; then
	AC_DEFINE(ENCRYPTION)
	AC_DEFINE(DES_ENCRYPTION)
fi

AC_MSG_RESULT($telnet_cv_opt_encryption)

AC_SUBST(ENCRYPTION)
AC_SUBST(DES_ENCRYPTION)


#
# locate kerberos libraries
#

AC_MSG_CHECKING([for kerberos tree])
telnet_athena_default=yes
AC_ARG_WITH(athena, 
[  --with-athena=path        location of athena tree],
[
case "$withval" in
yes)
telnet_athena_default="/usr/athena"
;;
no)
telnet_athena_default="no"
;;
*)
telnet_athena_default="$withval"
;;
esac
])

if test "$telnet_athena_default" = yes; then

libtop='../../..'
KRBLIBPATH=""
LIBKRB='-L$(libtop)/lib/krb -lkrb'
LIBDES='-L$(libtop)/lib/des -ldes'
LIBKAFS='-L$(libtop)/lib/kafs -lkafs'
LIBROKEN='-L$(libtop)/lib/roken -lroken'
KRBINCPATH='-I$(libtop)/include -I$(srcdir)/$(libtop)/include'
telnet_msg="default"

elif test "$telnet_athena_default" = no; then

if test "$telnet_cv_opt_encryption" = yes -o "$telnet_cv_opt_authentication" = yes; then

AC_MSG_ERROR([Kerberos libraries are needed for authentication and encryption])

fi

else

libtop="$telnet_athena_default"
KRBLIBPATH='-L$(libtop)/lib'
LIBKRB="-lkrb"
LIBDES="-ldes"
LIBKAFS="-lkafs"
LIBROKEN="-lroken"
KRBINCPATH='-I$(libtop)/include'
telnet_msg="$telnet_athena_default"

fi

AC_SUBST(libtop)
AC_SUBST(KRBINCPATH)
AC_SUBST(KRBLIBPATH)
AC_SUBST(LIBKRB)
AC_SUBST(LIBDES)
AC_SUBST(LIBKAFS)
AC_SUBST(LIBROKEN)

AC_MSG_RESULT($telnet_msg)

#
# default im
#


AC_MSG_CHECKING(for default im)

AC_ARG_ENABLE(default-im, [  --enable-default-im[=ARG] default initial banner], [

if test "$enableval" != yes; then
	default_im=$enableval
else
	os_ver=`uname -s`
	case $os_ver in
		AIX)
			os_rel=`uname -v`.`uname -r`
		;;
		*)
			os_rel=`uname -r`
		;;
	esac

	default_im="$os_ver $os_rel (%h) (%t)"
fi 
unset telnet_cv_opt_default_im
], [
	default_im=no
])
AC_CACHE_VAL(telnet_cv_opt_default_im, telnet_cv_opt_default_im="$default_im")

if test "$telnet_cv_opt_default_im" != no; then
	AC_DEFINE_UNQUOTED(USE_IM, "$telnet_cv_opt_default_im")
fi

AC_MSG_RESULT($telnet_cv_opt_default_im)

AC_SUBST(USE_IM)

#
# misc options
#

AC_DEFINE(DIAGNOSTICS)
AC_SUBST(DIAGNOSTICS)

AC_DEFINE(KLUDGELINEMODE)
AC_SUBST(KLUDGELINEMODE)

AC_DEFINE(OLD_ENVIRON)
AC_SUBST(OLD_ENVIRON)

#
# AIX needs /lib/pse.exp for getmsg, but alas that file is broken in
# AIX414
#

if test -f /lib/pse.exp ;then
	LIBS="$LIBS -Wl,-bI:/lib/pse.exp"
fi

AC_FIND_FUNC(tgetent, termcap)
AC_FIND_FUNC(setupterm, curses)
AC_FIND_FUNC(socket, socket)
AC_FIND_FUNC(gethostbyname, nsl)
	

AC_CHECK_FUNCS(cgetent getstr cgetstr uname vhangup)
AC_CHECK_FUNCS(frevoke revoke setsid setpgid getmsg)
AC_CHECK_FUNCS(tgetent setupterm ptsname ttyname unlockpt grantpt)

AC_FIND_FUNC(logout, util)

AC_SUBST(HAVE_LIBTERMCAP)

AC_CHECK_HEADERS(sys/filio.h sys/ioctl.h sys/ptyvar.h sys/resource.h)
AC_CHECK_HEADERS(sys/select.h sys/stream.h sys/strtty.h sys/str_tty.h)
AC_CHECK_HEADERS(sys/tty.h termio.h termios.h utmpx.h sys/uio.h)


# Simple test for streamspty, based on the existance of getmsg(), alas
# this breaks on SunOS4 which have streams but BSD-like ptys
#
# And also something wierd has happend with dec-osf1, fallback to bsd-ptys

AC_MSG_CHECKING(for streamspty)
case "`uname -sr`" in
SunOS\ 4*|OSF1*)
	krb_cv_sys_streamspty=no
	;;
AIX*)
	os_rel=`uname -v`.`uname -r`
	if expr "$os_rel" : "3*" >/dev/null 2>&1; then
		krb_cv_sys_streamspty=no
	else
		krb_cv_sys_streamspty="$ac_cv_func_getmsg"
	fi
	;;
*)
	krb_cv_sys_streamspty="$ac_cv_func_getmsg"
	;;
esac
if test "$krb_cv_sys_streamspty" = yes; then
	AC_DEFINE(STREAMSPTY)
fi
AC_SUBST(STREAMSPTY)
AC_MSG_RESULT($krb_cv_sys_streamspty)


###

AC_OUTPUT(Makefile libtelnet/Makefile telnet/Makefile telnetd/Makefile)