Questions about locales

[James Ng <james_nghk_debian_user@yahoo.com.hk>]

Hi,

    I want to ask something about locales. Since my nationality is 
Chinese (from Hong Kong), I use the locale zh_TW.Big5. When I upgraded 
the gcc and g++ with "apt-get", during the setting up, the following 
messages is shown:

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
            LANGUAGE = (unset),
            LC_ALL = (unset),
            LC_CTYPE = "zh_TW.Big5"
            LANG = "zh_TW.Big5"
        are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C")

When I run xcin, which is used to input Chinese Character and using 
locale zh_TW.Big5.
the console report that "C locale "zh_TW.Big5" is not supported by your 
system".

      I want to ask if the gcc and g++ is too new, so that it has some 
problem with the locale.

Regards,
James Ng