On May 18, 2017, at 12:16 PM, Viktor Sergiienko <singalen@gmail.com> wrote:
Hello,
I'm developing for a pretty small-sized embedded system, and 2.9M of binaries is a bit too much for us. The system never uses a date before 2007.
I estimate I can slim it down too 500K by cutting down the old data.
1. I made a script to cut down the source data: all the rules and all the zonelines before 2001. Compiling this data, I get a lot of errors like:
"northamerica", line 2537: %s in ruleless zone "northamerica", line 2618: unruly zone
because some zones are left without rules, but with %s format in them.
2. I tried to modify zic itself, but apparently understanding it will take me days. Just setting min_year to 2001 results in bunch of
can't determine time zone abbreviation to use just after until time
Does anyone have a ready solution?
Not completely ready, but... I had the same need some time ago. I made a small change to zic to add a switch that says "omit data from before Y" (with in our case, Y=2001). That produces files that are much shorter, but also a lot of duplicates -- because often two zones differ only in early rules. So I create hardlinks for any duplicate files. The result is about 100kB of actual data. I don't remember if I tried it at the source level, as you did. I think that's a bit messy for cases where the most recent rule is from before your cutoff. The change in zic was pretty easy. paul