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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: I have gnat 13.1.0 on my M1 Mac; I'd like to have my own Ada+GNAT *.ad[sb] library files, where are they?
Date: Mon, 26 Jun 2023 20:48:39 +0100
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Jere <jhb.chat@gmail.com> writes:

> On Sunday, June 25, 2023 at 5:49:11 PM UTC-4, Keith Thompson wrote:
>> Simon Wright writes: 
>> [...]
>> > But you say you know that. I wonder whether it's the crunched filenames 
>> > that are confusing? (a legacy of the days when DOS 8.3 filenames were 
>> > required for a large part of GNAT's target audience). You can find the 
>> > crunched filename for a package using gnatkr (gnat krunch): 
>> >
>> > $ gnatkr ada.sequential_io.ads 
>> [fixed typo]
>> > a-sequio.ads 
>> > 
>> > (you don't actually need whatever's after the final period to be the 
>> > actual file extension: you could use '.open' or just '.').
>> Which raises a question: Why does GNAT still use crunched filenames? It 
>> probably makes sense to continue to support them (does anyone use GNAT 
>> on MS-DOS?), but I wouldn't think it would be difficult to use full file 
>> names on the vast majority of systems that support them. It's not a 
>> huge deal, but using full file names where possible would be less 
>> annoying. 
>
> Unless they changed how the GNAT compiler works in the last few years,
> then my guess is inertia
> to do that.  Right before the pandemic hit, I had the neat idea of
> doing my own bare metal
> runtime and to use normal uncrunched names.  The RTS compiled just
> fine doing that.  However,
> when I tried to use the RTS to build a full fledged program, it failed
> to find the package in the RTS.
> I don't recall if it failed at compile time or link time, but
> crunching the names and recompiling the
> RTS fixed the issue.  So something in their compiler requires the
> crunched names, or if they have
> since changed that, used to require it.

The package in the compiler that deals with crunched names is Rtsfind,
https://github.com/gcc-mirror/gcc/blob/master/gcc/ada/rtsfind.ads