Re: [PATCH v2] t9604: Fix test for musl libc and new Debian

From: Eric Sunshine <sunshine@sunshineco.com>
Date: Apr 10, 2024, 03:29 UTC
Message-ID: <CAPig+cSX0VzG7bRzh6XPg-cAauXanMo27yk9yERD3dsOi6bsFw@mail.gmail.com>
In-Reply-To: <20240410032812.30476-1-congdanhqx@gmail.com>

On Tue, Apr 9, 2024 at 11:28 PM Đoàn Trần Công Danh <congdanhqx@gmail.com> wrote:

Show 5 quoted lines

> CST6CDT and the like are POSIX timezone, with no rule for transition.
> And POSIX doesn't enforce how to interpret the rule if it's omited.
> Some libc (e.g. glibc) resorted back to IANA (formerly Olson) db rules
> for those timezones.  Some libc (e.g. FreeBSD) uses a fixed rule.
> Other libc (e.g. musl) interpret that as no transition at all [1].

s/omited/omitted/

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> In addition, distributions (notoriously Debian-derived, which uses IANA
> db for CST6CDT and the like) started to split "legacy" timezones
> like CST6CDT, EST5EDT into `tzdata-legacy', which will not be installed
> by default [2].
>
> In those cases, t9604 will run into failure.
>
> Let's switch to POSIX timezone with rules to change timezone.
>
> 1: http://mm.icann.org/pipermail/tz/2024-March/058751.html
> 2: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1043250
>
> Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>