How do I deal with non-ASCII characters in IO operations?

Question

As the title says, I'm having a problem dealing with characters outside of ASCII (like 'á','ã', etc) in IO operations. Look at the example (Unix environment):

import System.Cmd
system "ls aaaá"

Which returns the ls command code error:

(...)ls: can't access "aaa�" : no such file or directory(...)

How can I fix this?

Answer 1

根据hammar的评论，我安装了GHC v7.2.2（我的旧版本是v6.9.9），并且修复了错误。

Answer 2

1. Check your system locale
2. Check the encoding of your Haskell sources

If both are UTF8 it should work.