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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Ada and Unicode
Date: Tue, 20 Apr 2021 14:17:38 -0500
Organization: JSA Research & Innovation
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"Simon Wright" <simon@pushface.org> wrote in message 
news:lybla9574t.fsf@pushface.org...
> Shark8 <onewingedshark@gmail.com> writes:
>
>> It's actually a non-issue for Byron, because the file-reader does a
>> BOM-check [IIRC defaulting to ASCII in the absence of a BOM]
>
> GNAT does a BOM-check also. gnatchop does one better, carrying the BOM
> from the top of the input file through to each output file.

That's what the documentation says, but it didn't work on ACATS source files 
(the few which use Unicode start with a BOM). I had to write a bunch of 
extra code in the script generator to stick the options on the Unicode files 
(that worked). Perhaps that's been fixed since, but I wouldn't trust it 
(burned once, twice shy).

                                   Randy.