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From: "Luke A. Guest" <laguest@archeia.com>
Newsgroups: comp.lang.ada
Subject: Re: Is there another ada compiler
Date: Mon, 3 Aug 2020 15:29:34 +0100
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On 03/08/2020 14:51, Shark8 wrote:
> RR Software has Janus/Ada.
> PTC has ObjectAda and ApexAda.
> Green Hills has an Ada compiler.
> DDC-I has a compiler.
> IBM used to have a compiler. (I'm not sure they do any more.)

They sold it.

All the above are commercial and cost £££££'s

> There's also work being done on some open source compilers like HAC or my own Byron.
> 

HAC is not going to be a full compiler, so it's really worth mentioning.

Byron's not anywhere near close to generating assembly.

In answer to the OP's question, no, there isn't another open source
compiler.