Hello Paul, I've added the tracing, please see: diff --git a/zdump.c b/zdump.c index 16e73ae..f33a925 100644 --- a/zdump.c +++ b/zdump.c @@ -696,6 +696,7 @@ hunt(timezone_t tz, char *name, time_t lot, struct tm *lotmp, time_t hit, if (t == lot) break; tm_ok = my_localtime_rz(tz, &t, &tm) != NULL; + printf("TRACING: only_ok = %d | delta(&tm,&lotm) = %d | t - lot = %d \n", only_ok, delta(&tm, &lotm), t - lot); if (lotm_ok == tm_ok && (only_ok || (lotm_ok && tm.tm_isdst == lotm.tm_isdst skipped the only_ok = 1 output TRACING: only_ok = 0 | delta(&tm,&lotm) = 22568 | t - lot = 21600 TRACING: only_ok = 0 | delta(&tm,&lotm) = 11768 | t - lot = 10800 TRACING: only_ok = 0 | delta(&tm,&lotm) = 6368 | t - lot = 5400 TRACING: only_ok = 0 | delta(&tm,&lotm) = 3668 | t - lot = 2700 TRACING: only_ok = 0 | delta(&tm,&lotm) = 2318 | t - lot = 1350 TRACING: only_ok = 0 | delta(&tm,&lotm) = 675 | t - lot = 675 TRACING: only_ok = 0 | delta(&tm,&lotm) = 337 | t - lot = 337 TRACING: only_ok = 0 | delta(&tm,&lotm) = 168 | t - lot = 168 TRACING: only_ok = 0 | delta(&tm,&lotm) = 84 | t - lot = 84 TRACING: only_ok = 0 | delta(&tm,&lotm) = 42 | t - lot = 42 TRACING: only_ok = 0 | delta(&tm,&lotm) = 21 | t - lot = 21 TRACING: only_ok = 0 | delta(&tm,&lotm) = 10 | t - lot = 10 TRACING: only_ok = 0 | delta(&tm,&lotm) = 5 | t - lot = 5 TRACING: only_ok = 0 | delta(&tm,&lotm) = 2 | t - lot = 2 TRACING: only_ok = 0 | delta(&tm,&lotm) = 1 | t - lot = 1 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Sun Dec 31 23:59:59 1911 UT = Sun Dec 31 23:43:51 1911 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:00 1912 UT = Sun Dec 31 23:43:52 1911 LMT isdst=0 gmtoff=-968 TRACING: only_ok = 0 | delta(&tm,&lotm) = 22568 | t - lot = 21600 TRACING: only_ok = 0 | delta(&tm,&lotm) = 11768 | t - lot = 10800 TRACING: only_ok = 0 | delta(&tm,&lotm) = 6368 | t - lot = 5400 TRACING: only_ok = 0 | delta(&tm,&lotm) = 3668 | t - lot = 2700 TRACING: only_ok = 0 | delta(&tm,&lotm) = 2318 | t - lot = 1350 TRACING: only_ok = 0 | delta(&tm,&lotm) = 675 | t - lot = 675 TRACING: only_ok = 0 | delta(&tm,&lotm) = 337 | t - lot = 337 TRACING: only_ok = 0 | delta(&tm,&lotm) = 168 | t - lot = 168 TRACING: only_ok = 0 | delta(&tm,&lotm) = 84 | t - lot = 84 TRACING: only_ok = 0 | delta(&tm,&lotm) = 42 | t - lot = 42 TRACING: only_ok = 0 | delta(&tm,&lotm) = 21 | t - lot = 21 TRACING: only_ok = 0 | delta(&tm,&lotm) = 10 | t - lot = 10 TRACING: only_ok = 0 | delta(&tm,&lotm) = 5 | t - lot = 5 TRACING: only_ok = 0 | delta(&tm,&lotm) = 2 | t - lot = 2 TRACING: only_ok = 0 | delta(&tm,&lotm) = 1 | t - lot = 1 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:00 1912 UT = Sun Dec 31 23:43:52 1911 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:01 1912 UT = Sun Dec 31 23:43:53 1911 LMT isdst=0 gmtoff=-968 .... Regards Manuela Friedrich -----Original Message----- From: Paul Eggert <eggert@cs.ucla.edu> Sent: Mittwoch, 21. April 2021 20:34 To: Manuela Friedrich <Manuela.Friedrich@actian.com> Cc: Steven Shuriff <Steven.Shuriff@actian.com>; Time zone mailing list <tz@iana.org> Subject: Re: iana build failures on Windows On 4/20/21 4:57 AM, Manuela Friedrich wrote:
I still would like to double check about the zdump -v output for Africa Abidjan. I am getting 1946 lines of output. Is that in the range you get on Linux?
No, all I get is the following.
Africa/Abidjan -9223372036854775808 = NULL Africa/Abidjan -67768040609740801 = NULL Africa/Abidjan Thu Jan 1 00:00:00 -2147481748 UT = NULL Africa/Abidjan Thu Jan 1 00:16:07 -2147481748 UT = NULL Africa/Abidjan Thu Jan 1 00:16:08 -2147481748 UT = Thu Jan 1 00:00:00 -2147481748 LMT isdst=0 gmtoff=-968 Africa/Abidjan Mon Jan 1 00:16:07 1912 UT = Sun Dec 31 23:59:59 1911 LMT isdst=0 gmtoff=-968 Africa/Abidjan Mon Jan 1 00:16:08 1912 UT = Mon Jan 1 00:16:08 1912 GMT isdst=0 gmtoff=0 Africa/Abidjan Wed Dec 31 23:59:59 2147485547 UT = Wed Dec 31 23:59:59 2147485547 GMT isdst=0 gmtoff=0 Africa/Abidjan 67768036191676800 = NULL Africa/Abidjan 9223372036854775807 = NULL
So it appears that there is still some problem on MS-Windows that we haven't gotten to the bottom of. Looking at the output you sent me in earlier email (quoted below), it appears that there a problem starting at Sun Dec 31 23:59:59 1911 UT. Starting then, on your MS-Windows port for some reason zdump thinks there is a transition every second.
d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan -9223372036854775808 = NULL d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan -67768040609740801 = NULL d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Thu Jan 1 00:00:00 -2147481748 UT = NULL d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Thu Jan 1 00:16:07 -2147481748 UT = NULL d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Thu Jan 1 00:16:08 -2147481748 UT = Thu Jan 1 00:00:00 -2147481748 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Sun Dec 31 23:59:59 1911 UT = Sun Dec 31 23:43:51 1911 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:00 1912 UT = Sun Dec 31 23:43:52 1911 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:00 1912 UT = Sun Dec 31 23:43:52 1911 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:01 1912 UT = Sun Dec 31 23:43:53 1911 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:01 1912 UT = Sun Dec 31 23:43:53 1911 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:02 1912 UT = Sun Dec 31 23:43:54 1911 LMT isdst=0 gmtoff=-968 d:\devsrc\treasure_test\iana\zoneinfo\iana\Africa\Abidjan Mon Jan 1 00:00:02 1912 UT = Sun Dec 31 23:43:54 1911 LMT isdst=0 gmtoff=-968 ...
My suspicion is that the following line in zdump.c (line 702) is the culprit somehow: && delta(&tm, &lotm) == t - lot That is, I suspect that delta(&tm, &lotm) is not equal to t - lot, even though it should be in the "transitions" that zdump is reporting incorrectly. Here, tm is the result of calling localtime on t and lotm is the result of calling localtime on lot, and in this incorrect "transitions" t = lot + 1. Perhaps you can investigate my guess with a debugger, or by inserting debugging printfs to see why zdump is going awry.