-={ fredag, 11 marts 2016, 04:52:20 +0100 }=-

Hey Benny!

 BP> what charset should be used in iconv when its not defined

I have no idea.  Your guess is probably as good as anyone else's including
developers.  The Russians use of CP866 appears to be working but I wouldn't bet
the farm on it nor would I guarentee it's universality.  Myself I only use
ASCII when it comes documents where the character set cannot be determined and
would NEVER use a CHRS kludge to reset the character set in any of my editors. 
Would you?

Also setting the default to utf8 is the safest for everything including ASCII.

 BP> so report to aktive developpers about it did not help

Besides the LINUX echo, who would they be and where would I report it?

 BP> could you dokument that latin-1 problem in more verbose

As per any document of valid character set aliases, there is no such thing as
LATIN-1.  Some people think it is ISO-8859-1 but the closest alias it has in
reality is LATIN1.  It might work with Microsoft's CP1250 but I cannot say for
sure not having any microsoft products to test it on or any credible
documentation on LATIN-1 as an alias for anything.  All I know is that it
doesn't work with glibc's iconv as shown using;

  :read !echo -e "A M\xf8\xf8se once bit my sister..." | iconv -f latin-1
-t utf8
iconv: conversion from `latin-1' is not supported
Try `iconv --help' or `iconv --usage' for more information.

However this works;

  :read !echo -e "A M\xf8\xf8se once bit my sister..." | iconv -f latin1
-t utf8
A Møøse once bit my sister...

or even this which is not an alias but the actual character set which is the
same as your CHRS kludge;

 :read !echo -e "A M\xf8\xf8se once bit my sister..." | iconv -f
ISO-8859-1 -t utf8
A Møøse once bit my sister...

Note that I took the liberty of dropping the '2' at the end of the CHRS kludge
since it is another useless piece of information.

 BP> google is bad like hell when it comes to opensource problems

That I wouldn't know anything about.  Their search engine is good.  I use it
all the time.

Life is good,
Maurice

... Don't cry for me I have vi.
--- GNU bash, version 4.3.42(1)-release (x86_64-unknown-linux-gnu)