[BRLTTY] a simple question

[rmgls at free.fr]

Hi all,

as a consequence of my preview messages,
(libiconv undefined and some LANG and CHARSET variables set),
i would like to know if there is any test to handle this situation?
something like:

if libiconv is undeclared, i don't start at all 
(rather diplaying garbage),
and i display: LANG is set but libiconv is undefined?

is this make sense or i am misreading something?
thanks for your reply.

Best regards

rmgls