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From: Bruno Haible <bruno@clisp.org>
To: Rich Felker <dalias@libc.org>
Cc: "Dmitry V. Levin" <ldv@altlinux.org>,
	config-patches@gnu.org, musl@lists.openwall.com
Subject: Re: [musl] Re: OS detection wrong on Alpine Linux 3.10
Date: Sun, 20 Sep 2020 21:21:48 +0200	[thread overview]
Message-ID: <2533200.g9kxISXj3W@omega> (raw)
In-Reply-To: <20200920171446.GB3265@brightrain.aerifal.cx>

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


  reply	other threads:[~2020-09-20 19:22 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 [this message]
2020-09-20 20:58           ` Hadrien Lacour
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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