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Date: Fri,  4 Feb 2011 15:44:25 -0500
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Subject: Re: [9fans] missing Greek letters in p9p troff
From: Russ Cox <rsc@swtch.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
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> now I know a bit more. 9 eqn seems to throw away my Greek letters for
> some reason. Having a file with contents:
>
> .EQ
> a=CE=B1b
> .EN

Fixed.

Eqn was using the proposed standard functions mbtowc and wctomb
for processing multibyte character sequences and wide characters.
Unfortunately, those don't work in some places, such as your system
and mine.  (I am sure they would magically start working with the
right environment variable settings, but who has the time?)
I dropped in a UTF-8 implementation of those functions and
now eqn handles that input as you would expect.

Russ