iconv command problem

[H Xu <xusubsc%gmail.com@localhost>]

Hello Everyone,

On both Linux and FreeBSD, the following command could be used to remove 
invalid characters:

$ man cc | iconv -c

However, on NetBSD, it seems that iconv doesn't support this kind of 
usage. Is there any solution?

Thanks.

Regards,
H Xu
2011/3/28