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From: Hadrien Lacour <hadrien.lacour@posteo.net>
To: musl@lists.openwall.com
Subject: Re: [musl] Re: OS detection wrong on Alpine Linux 3.10
Date: Sun, 20 Sep 2020 22:58:31 +0200	[thread overview]
Message-ID: <20200920205831.jb2jbkzfvvb2mws4@gentoo-zen2700x> (raw)
In-Reply-To: <2533200.g9kxISXj3W@omega>

On Sun, Sep 20, 2020 at 09:21:48PM +0200, Bruno Haible wrote:
> Rich,
>
> POSIX — like many other standard — allows different implementations to
> behave differently. For example, iconv_open() and setlocale() behave
> differently in different POSIX-compliant libc implementations. This is
> OK. There is nothing wrong with it on either side.
>
> Unit tests [1] need to take into account the actual behaviour of the
> software. It is normal that a unit test's core function produces a
> different result with musl than with glibc. The "expected outcome"
> part of the unit test, in this case, needs to be different. This is
> an actual, practical need to know whether the config triple ends in
> linux-gnu vs. linux-musl.
>
> > There is one kinda legitimate purpose for detecting specifically musl:
>
> It is not your role to tell us which code we write is "legitimate" and
> which code is not. I am a grown-up programmer.
>
> Bruno
>
> [1] https://en.wikipedia.org/wiki/Unit_testing
>

Sorry to waltz in like this but isn't it bad practice in general to rely on
implementation-defined behaviours?

  reply	other threads:[~2020-09-20 20:58 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <4768019.hHWyC0TzgU@omega>
2020-09-20 10:12 ` Dmitry V. Levin
2020-09-20 11:19   ` Bruno Haible
2020-09-20 12:18     ` Ariadne Conill
2020-09-20 13:56     ` Szabolcs Nagy
2020-09-20 17:14       ` Rich Felker
2020-09-20 19:21         ` Bruno Haible
2020-09-20 20:58           ` Hadrien Lacour [this message]
2020-09-21  6:53           ` A. Wilcox
2020-09-21 11:46             ` Florian Weimer
2020-09-22 18:46           ` Rich Felker
2020-09-22 20:18             ` Bruno Haible
2020-09-22 20:33               ` Jeffrey Walton
2020-09-22 20:39             ` Jeffrey Walton
2020-09-22 21:04               ` Laurent Bercot
2020-09-22 21:17                 ` Jeffrey Walton
2020-09-23  8:49                   ` Laurent Bercot
2020-09-23 13:13                     ` James Y Knight
2020-09-23 16:08                       ` Rich Felker
2020-09-23 16:16                         ` Jeffrey Walton
2020-09-23 16:26                           ` Ariadne Conill
2020-09-23 16:57                             ` Jeffrey Walton
2020-09-23 16:36                           ` Rich Felker
2020-09-20 12:19   ` Ariadne Conill

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