# $Id: netlibs.m4,v 1.1 2004/10/24 20:48:37 jonz Exp $
# m4/netlibs.m4
# Andrew W. Nosenko <awn@bcs.zp.ua>
#
#   DS_NETLIBS([libs_out], [action-if-found], [action-if-not-found])
#
#   Search for additional libraries containing inet_ntoa() and socket().
#
#   Typically, these are -lnsl and -lsocket for Solaris and none for
#   Linux.
#
AC_DEFUN([DS_NETLIBS],
[
    AS_VAR_PUSHDEF([save_LIBS], [ds_netlibs_save_LIBS])
    AS_VAR_PUSHDEF([netlibs], [ds_netlibs_netlibs])
    AS_VAR_PUSHDEF([success], [ds_netlibs_success])

    save_LIBS="$LIBS"
    LIBS=''
    success=yes

    AC_SEARCH_LIBS([inet_ntoa], [nsl], [success=yes], [success=no])
    if test x"$success" = xyes
    then
        AC_SEARCH_LIBS([socket], [socket], [success=yes], [success=no])
    fi

    netlibs="$LIBS"
    LIBS="$save_LIBS"

    AS_VAR_POPDEF([save_LIBS])
    AS_VAR_POPDEF([netlibs])
    AS_VAR_POPDEF([success])

    if test x"$ds_netlibs_success" = xyes
    then
        ifelse([$1], [], [:], [$1="$ds_netlibs_netlibs"])
        ifelse([$2], [], [:], [$2])
    else
        ifelse([$3], [], [:], [$3])
    fi
])