dnl

dnl socket.m4 --- autoconf input file for gawk

dnl

dnl Copyright (C) 1995, 1996, 1998, 1999, 2000, 2003, 2004 the Free Software Foundation, Inc.

dnl

dnl This file is part of GAWK, the GNU implementation of the

dnl AWK Progamming Language.

dnl

dnl GAWK is free software; you can redistribute it and/or modify

dnl it under the terms of the GNU General Public License as published by

dnl the Free Software Foundation; either version 3 of the License, or

dnl (at your option) any later version.

dnl

dnl GAWK is distributed in the hope that it will be useful,

dnl but WITHOUT ANY WARRANTY; without even the implied warranty of

dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

dnl GNU General Public License for more details.

dnl

dnl You should have received a copy of the GNU General Public License

dnl along with this program; if not, write to the Free Software

dnl Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA

dnl

dnl Find the socket libraries

dnl largely stolen from AC_PATH_XTRA

AC_DEFUN([GAWK_AC_LIB_SOCKETS], [

gawk_have_sockets=no

# Check for system-dependent location of socket libraries

SOCKET_LIBS=

if test "$ISC" = yes; then

  SOCKET_LIBS="-lnsl_s -linet"

else

  # Martyn.Johnson@cl.cam.ac.uk says this is needed for Ultrix, if the X

  # libraries were built with DECnet support.  And karl@cs.umb.edu says

  # the Alpha needs dnet_stub (dnet does not exist).

  #

  # ADR: Is this needed just for sockets???

#  AC_CHECK_LIB(dnet, dnet_ntoa, [SOCKET_LIBS="$SOCKET_LIBS -ldnet"])

#  if test $ac_cv_lib_dnet_ntoa = no; then

#    AC_CHECK_LIB(dnet_stub, dnet_ntoa,

#	[SOCKET_LIBS="$SOCKET_LIBS -ldnet_stub"])

#  fi

  # msh@cis.ufl.edu says -lnsl (and -lsocket) are needed for his 386/AT,

  # to get the SysV transport functions.

  # chad@anasazi.com says the Pyramid MIS-ES running DC/OSx (SVR4)

  # needs -lnsl.

  # The nsl library prevents programs from opening the X display

  # on Irix 5.2, according to dickey@clark.net.

  AC_CHECK_FUNC(gethostbyname)

  if test $ac_cv_func_gethostbyname = no; then

    AC_CHECK_LIB(nsl, gethostbyname, SOCKET_LIBS="$SOCKET_LIBS -lnsl")

  fi

  # lieder@skyler.mavd.honeywell.com says without -lsocket,

  # socket/setsockopt and other routines are undefined under SCO ODT

  # 2.0.  But -lsocket is broken on IRIX 5.2 (and is not necessary

  # on later versions), says simon@lia.di.epfl.ch: it contains

  # gethostby* variants that don't use the nameserver (or something).

  # -lsocket must be given before -lnsl if both are needed.

  # We assume that if connect needs -lnsl, so does gethostbyname.

  AC_CHECK_FUNC(connect)

  if test $ac_cv_func_connect = no; then

    AC_CHECK_LIB(socket, connect, SOCKET_LIBS="-lsocket $SOCKET_LIBS"

    				  gawk_have_sockets=yes, ,

	$SOCKET_LIBS)

  else

    gawk_have_sockets=yes

  fi

fi

if test "${gawk_have_sockets}" = "yes"

then

	AC_MSG_CHECKING([where to find the socket library calls])

	case "${SOCKET_LIBS}" in

	?*)	gawk_lib_loc="${SOCKET_LIBS}" ;;

	*)	gawk_lib_loc="the standard library" ;;

	esac

	AC_MSG_RESULT([${gawk_lib_loc}])

	AC_DEFINE(HAVE_SOCKETS, 1, [we have sockets on this system])

fi

AC_SUBST(SOCKET_LIBS)dnl

])dnl