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From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
To: "Simon L. Nielsen" <simon@FreeBSD.org>
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Date: Sat, 10 Oct 2009 19:11:50 +0200
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Cc: freebsd-hackers@freebsd.org, stef@memberwebs.com
Subject: Re: Is the FreeBSD ABI compatibility policy documented anywhere
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"Simon L. Nielsen" <simon@FreeBSD.org> writes:
> It's not entirely that simple.  The ABI on a stable branch like 7.x
> should be backward compatible, but there isn't a guarantee of forward
> compatibility.  IE, 7.0 binary should be able to run on 7.x, but a 7.2
> binary might not run on 7.0.  It should be more or less the same with
> the API's.
>
> PS. do note that there is no 100% guarantee.

Correct, but we're getting closer to that now that we have symbol
versioning - although we won't reach 100% until we have versioned
symbols in *all* libraries, which is currently not the case.  Even then,
a developer might break the ABI by mistake, but hopefully we'd catch
that before it made it into a release.

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no