[tz] tz Digest, Vol 114, Issue 4

Tue Mar 2 15:20:18 UTC 2021

I can confirm that there can be funny behavior on  32 bit  O/S if zic runs without -b fat

Sent from my iPhone

> On Mar 2, 2021, at 10:08, tz-request at iana.org wrote:
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> Today's Topics:
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>   1. Re: Troubles with zone Asia/Gaza after tzdata2020b release
>      (Evgheni Antropov)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Tue, 2 Mar 2021 08:49:33 +0000
> From: Evgheni Antropov <Evgheni.Antropov at addgrup.com>
> To: Paul Eggert <eggert at cs.ucla.edu>, Tim Parenti
>    <tim at timtimeonline.com>
> Cc: Time zone mailing list <tz at iana.org>
> Subject: Re: [tz] Troubles with zone Asia/Gaza after tzdata2020b
>    release
> Message-ID: <5b8eea9809f34e658c6529708744c1ad at addgrup.com>
> Content-Type: text/plain; charset="us-ascii"
> 
> Dear Paul and Tim,
> Thank you for attention to this issue.
> 
> We're using tzdata on the our embedded devices with ARMv7 Processor rev 2 (v7l), which has vanilla kernel
> [root at Router8:~]# uname -a
> Linux Router8 4.4.19-gdb0b54cdad #49 PREEMPT Mon Sep 30 15:10:54 EEST 2019 armv7l GNU/Linux
> 
> Whole filesystem was compiled using Yocto Project 1.5 (poky-dora-10.0.0) https://old.yoctoproject.org/releases-yocto-version/yocto-project-15-dora
> 
> Tzdata was compiling on Ubuntu 18.04 without any additional flags and cross-compilers, just simple make install
> #!/bin/sh
> make clean
> 
> #For compiling source extract tzdata and tzcode in one directory and run:
> make TOPDIR=$(pwd)/binaries install
> 
> with additional changes related with requests from our several customers, which are not effecting on the this file.
> 
> In attachment you can see whole listing of compilation.
> 
> Best regards,
> 
> 
> Evgheni Antropov
> Software R&D Engineer
> +373 22 404 665
> www.addgrup.com<http://www.addgrup.com>
> 
> 
> -----Original Message-----
> From: Paul Eggert <eggert at cs.ucla.edu>
> Sent: Tuesday, March 2, 2021 01:59
> To: Tim Parenti <tim at timtimeonline.com>
> Cc: Evgheni Antropov <Evgheni.Antropov at addgrup.com>; Time zone mailing list <tz at iana.org>
> Subject: Re: [tz] Troubles with zone Asia/Gaza after tzdata2020b release
> 
>> On 3/1/21 1:19 PM, Tim Parenti via tz wrote:
>> Why is the system you're
>> testing only looking at the (legacy) 32-bit data in the v1 data block,
>> and not using the 64-bit data in the v2+ data block?  Please let us
>> know more about the system you're running
> 
> Another possibility is that Evgheni is using a stripped down library that ignores both data blocks, and uses only the TZ string at the end.
> Such a library does not conform to Internet RFC 8536 but might be suitable for stripped down devices such as a router. For Asia/Gaza, the TZ string is TZ='EET-2EEST,M3.4.4/48,M10.4.4/49', where the "48" and "49" rely on the extension specified in Internet RFC 8536 section 3.3.1 and scheduled to appear in a future POSIX release. If Evgheni's library doesn't support that extension then that's the problem.
> 
> Yet another possibility is that Evgheni's library simply ignores the TZ string. '-b slim' relies on the TZ string even for current timestamps, whereas '-b fat' fills out entries through 2038. However, if this were the issue I expect it would happen for timezones other than Asia/Gaza.
> 
>> Please let us know more
>> about the system you're running
> 
> Yes, that'd be helpful.
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> End of tz Digest, Vol 114, Issue 4
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