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Message-ID: <1360344600.2983.365.camel@eris.loria.fr>
Date: Fri, 08 Feb 2013 18:30:00 +0100
From: Jens Gustedt <jens.gustedt@...ia.fr>
To: musl@...ts.openwall.com
Subject: Re: guard bug for strerror_r
Am Freitag, den 08.02.2013, 17:55 +0100 schrieb Szabolcs Nagy:
> musl provides the posix api when requested
>
> musl provides many gnu specific apis when _GNU_SOURCE is set
>
> but when posix and gnu collides it's always the posix api,
definitively a good strategy, but which reaches its limits, here.
> musl never provides broken gnu apis
>
> at least this was the policy so far
__GNU_SOURCE is defined by the gnu platform to specify the
availability of their extensions. Unfortunately they don't have a
finer grained tool to distinguish different types of extensions they
provide. (BTW the same holds for gcc, that you only can tune with
version numbers.)
If I, as a user, define __GNU_SOURCE I expect to have the gnu
extension, if I then use strerror_r I expect to have their interface,
since this is documented like this. At least as it is now, I don't
think I have any means to distinguish the two platforms and to know
which version of strerror_r I would receive.
Jens
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