time zone isn't set

[Hannu Nyman]

Hannu Nyman kirjoitti 19.10.2020 klo 19.01:
>
> Could it be that the zoneinfo format has changed so that musl is not 
> compatible any more?
>
> I suspect this:
>
> http://mm.icann.org/pipermail/tz-announce/2020-October/000059.html
>
>    Changes to build procedure
>
>      The Makefile now defaults POSIXRULES to '-', so the posixrules
>      feature (obsolete as of 2019b) is no longer installed by default.
>
>
> The last zoneinfo version bump was really simple (like always), but 
> possibly the internal format has changed so that musl libc isn't able to 
> read it any more.
>
> Possibly musl uses that posixrules item to read zoneinfo?
>

I tested compiling both 2020a and 2020b, and noticed that the data files from 
2020b were really short.

I compared Europe/Helsinki from 2020a and 2020b, and noticed a large size 
difference:
481 bytes (2020b) vs 1900 bytes (2020a).

See differences in 
https://github.com/openwrt/packages/pull/13644#issuecomment-712312797 
<https://github.com/openwrt/packages/pull/13644#issuecomment-712312797>

Looks like 2020b is missing 3/4 of the earlier contents, and apparently musl 
needs to removed deprecated data/functionality.


Helsinki timezone was applied ok with 2020a, while with 2020b "date" shows 
just GMT/UTC time:

root at router1:~# opkg install --force-downgrade --force-reinstall 
/tmp/zoneinfo-europe_2020b-1_arm_cortex-a15_neon-vfpv4.ipk
Removing package zoneinfo-europe from root...
Installing zoneinfo-europe (2020b-1) to root...
Configuring zoneinfo-europe.
root at router1:~# date
Mon Oct 19 17:50:17  2020    (--> wrong, just UTC)

root at router1:~# opkg install --force-downgrade --force-reinstall 
/tmp/zoneinfo-europe_2020a-1_arm_cortex-a15_neon-vfpv4.ipk
Removing package zoneinfo-europe from root...
Installing zoneinfo-europe (2020a-1) to root...
Configuring zoneinfo-europe.
root at router1:~# date
Mon Oct 19 20:50:25 EEST 2020   (--> correct UTC+3)


I have reverted the zoneinfo 2020b version bump in the packages repo for now. 
There is now the old 2020a.