[tz] [PROPOSED] New file tzdata.zi for text-format tzdata

Paul Eggert eggert at cs.ucla.edu
Thu May 25 00:49:56 UTC 2017

On 05/24/2017 05:04 PM, Randal L. Schwartz wrote:
> Is that awk or gawk?

It's supposed to be portable Awk code, as per the POSIX standard and 
without using Gawk extensions; see:


Although the new script does not work with circa-1977 Awk, the existing 
tzdb code doesn't work either: for example, Makefile uses 'awk -v', 
which old Awks don't grok. If you're building tzdb on Solaris where the 
default awk is quite old, you should use 'make AWK=gawk' or (for Solaris 
10 and earlier) 'make AWK=/usr/xpg4/bin/awk' to get a POSIX-compatible 
Awk; this is needed both before and after the proposed patch. As I 
recall, Solaris is the only major holdout in this area.

If the new script introduces a new portability problem with Awk, I would 
like to know about it.

By the way, the proposed patch misses a few abbreviation possibilities 
in the part of the code that works around a word-abbreviation bug in zic 
2017b and earlier. The attached further patch fixes that, to make the 
output a tiny bit smaller.

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