* Possible path to bootstrap GNAT, the Ada compiler
@ 2024-10-15 15:38 Ludovic Courtès
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From: Ludovic Courtès @ 2024-10-15 15:38 UTC (permalink / raw)
To: guix-devel; +Cc: Cayetano Santos
Hello there,
Recently, Alexandre Oliva kindly sent me this message, which I’m
forwarding with his permission:
> The other day, we talked on the Fediverse about bootstrapping GNAT in
> Guix, and I wasn't aware of any way to accomplish that. I've had
> occasion to talk to some AdaCore old-timers this week and learned about
> two paths:
>
> SETL is the older one. It was the environment used to get GNAT from the
> ground up. I'm pretty sure I've seen mentions thereof in Guix
> discussions already, so I'll assume you already knew about it.
>
> The one that may be more promising for now, but that I'm not sure solves
> the problem at all, is CCG.
> https://docs.adacore.com/live/wave/gnat_ccg/html/gnatccg_ug/gnat_ccg/gnat_ccg.html
>
> IIUC, it's GNAT-llvm with the backend set to generate C code. So, with
> a preexisting CCG, one could (presumably) translate GNAT to C, verify
> the translation as much as desired, and use the result to build a
> bootstrapping compiler, that could then be used as a starting point to
> build recent and future versions of GNAT.
Food for thought!
Ludo’.
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