autoconf 2.64 fails when IFS is changed

[Arkadiusz Miskiewicz]

autoconf 2.64 fails when IFS is changed while 2.63 works fine

address@hidden ~/test/1]$ cat configure.ac
#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

AC_PREREQ([2.64])
AC_INIT([FULL-PACKAGE-NAME], [VERSION], [BUG-REPORT-ADDRESS])

old_IFS=$IFS
IFS=","
AC_DEFINE([VC_ENABLE_API_COMPAT],   [1])
IFS="$old_IFS"

AC_OUTPUT

address@hidden ~/test/1]$ aclocal; autoconf

address@hidden ~/test/1]$ ./configure
./configure[1640]: print -r --: not found
configure: creating ./config.status

address@hidden ~/test/1]$ autoconf --version
autoconf (GNU Autoconf) 2.64
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv2+: GNU GPL version 2 or later
<http://gnu.org/licenses/old-licenses/gpl-2.0.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by David J. MacKenzie and Akim Demaille.


-- 
Arkadiusz Miśkiewicz        PLD/Linux Team
arekm / maven.pl            http://ftp.pld-linux.org/