Re: tzname, daylight, timezone: Update documentation

[Eric Blake]

On Thu, Jun 06, 2024 at 08:36:05PM GMT, Bruno Haible wrote:
> This patch updates the documentation regarding the three variables
>   tzname
>   daylight
>   timezone
> that are supposed to be set by tzset().
> 
> OpenBSD ≥ 5.8 supports these variables, but FreeBSD - to this day -
> supports only 'tzname'.
> 
> On MSVC, these variables are not really missing; they just have a
> different name, prefixed with underscore.

You should also document that POSIX will be recommending that you
avoid these three globals, because they do not work with
location-based TZ settings (standardized in the soon-to-be-released
POSIX Issue 8):

https://austingroupbugs.net/view.php?id=1816

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.
Virtualization:  qemu.org | libguestfs.org