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From: Simon Wright <simon@pushface.org>
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Subject: Re: 64 bit codes
Date: Tue, 27 Sep 2011 16:39:59 +0100
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Date: 2011-09-27T16:39:59+01:00
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Ludovic Brenta <ludovic@ludovic-brenta.org> writes:

> No, there is more to it than that.  Given that most of GNAT is written
> in Ada, one requires a 64-bit Ada compiler to produce the first 64-bit
> Ada compiler; that's the classic catch-22 aka bootstrapping process.
> In the case of GNAT, this problem is exacerbated by the requirement to
> also bootstrap the run-time library.

I built an x86_64 compiler for Darwin using an i386 (32-bit) compiler;
no trouble at all.

Not going to try it for Windows, though!