On 2020-05-14 01:54, Tim Parenti wrote:
I noticed recently that the systemv file, which adapted a subset of North American zones with limited rulesets to old versions of System V, has had all its once-useful bits commented out since 2005p. Looking back at list archives, even discussion at the time argued that the file wasn't really needed then. The attached proposed patch 0001 removes this obsolete file and its references.
Thanks! But if you do that you must also modify the goal of tzdb as stated in the theory file: that the tzdb data "record the history and predicted future of all computer-based clocks that track civil time." SystemV clocks have been "computer-based clocks that track civil time", and they are no longer "recorded". So, apparently, you no longer want to record facts about "all computer-based clocks" tracking civil time. Actually, with very few exceptions, tzdb currently records the current state, the predicted future, and a selected part of the history, of civil time scales (not of computer clocks) as far as they are known; for the use in computer clocks, with special support for POSIX computer clocks. The dst bit is a special attribute for POSIX, while other attributes required by other computer systems (eg, the offset to standard time and the summer time indicator) are currently not supported by tzdb. Michael Deckers.