[tz] Undoing the effect of the new alike-since-1970 patch

Paul Eggert eggert at cs.ucla.edu
Tue Jun 8 18:21:45 UTC 2021

On 6/8/21 10:44 AM, Stephen Colebourne via tz wrote:
> Are you proposing a makefile option to recreate the original source
> files using the data in backzone?

Not byte-for-byte copies, no. Just a functional copy containing the 
equivalent of what the data would have looked like had the new 
alike-since-1970 patch not been installed.

One way to do this would be to generate a file that contains what 
tzdata.zi does, except it omits the effect of the alike-since-1970 
patch. This is basically what Tom Lane was asking for here:


and I expect it wouldn't be too hard to automate that.

More information about the tz mailing list