ubuntu系统sh命令引起编译问题

主机系统：Ubuntu10.10

       交叉编译iptables-1.4.10时，出现以下错误：
eval: 1: libtool_args+=: not found
eval: 1: compile_command+=: not found
eval: 1: finalize_command+=: not found
eval: 1: libtool_args+=: not found
eval: 1: compile_command+=: not found
eval: 1: finalize_command+=: not found
eval: 1: libtool_args+=: not found
eval: 1: compile_command+=: not found
eval: 1: finalize_command+=: not found
eval: 1: libtool_args+=: not found
eval: 1: compile_command+=: not found
eval: 1: finalize_command+=: not found
eval: 1: libtool_args+=: not found
eval: 1: compile_command+=: not found
eval: 1: finalize_command+=: not found
eval: 1: libtool_args+=: not found
eval: 1: compile_command+=: not found
eval: 1: finalize_command+=: not found

解决方法：cd /bin; rm sh; ln -s bash sh

在ubuntu发行版下,查看sh命令。
$ cd /bin
$ ls -l
lrwxrwxrwx 1 root root      4  sh -> dash
实际上，sh命令链接的是dash(Debian-shell)。