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##### http://autoconf-archive.cryp.to/lib_socket_nsl.html
#
# SYNOPSIS
#
# LIB_SOCKET_NSL
#
# DESCRIPTION
#
# This macro figures out what libraries are required on this platform
# to link sockets programs.
#
# The common cases are not to need any extra libraries, or to need
# -lsocket and -lnsl. We need to avoid linking with libnsl unless we
# need it, though, since on some OSes where it isn't necessary it
# will totally break networking. Unisys also includes gethostbyname()
# in libsocket but needs libnsl for socket().
#
# LAST MODIFICATION
#
# 2005-09-06
#
# COPYLEFT
#
# Copyright (c) 2005 Russ Allbery <rra@stanford.edu>
# Copyright (c) 2005 Stepan Kasal <kasal@ucw.cz>
# Copyright (c) 2005 Warren Young <warren@etr-usa.com>
#
# Copying and distribution of this file, with or without
# modification, are permitted in any medium without royalty provided
# the copyright notice and this notice are preserved.
AC_DEFUN([LIB_SOCKET_NSL],
[
AC_SEARCH_LIBS([gethostbyname], [nsl])
AC_SEARCH_LIBS([socket], [socket], [], [
AC_CHECK_LIB([socket], [socket], [LIBS="-lsocket -lnsl $LIBS"],
[], [-lnsl])])
])
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