Grant Update: y2038 fix
Tue, 23-Sep-2008 by
Alberto Simões
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From a mail on Perl 5 Porters:
Attached is the latest 2038 patch from the y2038 branch.
* Configure now probes for the safe range of the system's localtime() and gmtime(). Perl will use the system functions inside their safe range. [Thanks Merijn]
* Perl now ships with its own 64 bit gmtime() and timegm().
* localtime() is made 2038 safe on 32 bit systems using the algorithm described here http://code.google.com/p/y2038/wiki/HowItWorks
* Time::Local can now handle past 2038.
* Time::gmtime tests improved and expanded past 2038 and 1901.
* Time::localtime tests improved and expanded past 2038.
Open issues
* localtime64.h and .c need to be wired into the Makefile. I don't now how to do this.
* The LOCALTIME_EDGECASE_BROKEN special case needs to be reincorporated.
* This has not been tested on a system with an unsigned or floating point time_t.
* The configure probes are probably broken with a floating point time_t.
Other notes
* The clever way Time::Local handles the year (8, 108 and 2008 are all 2008) means there are gaps in what years you can run through timelocal() and timegm().
* Since localtime64.c now has its own timegm() core time modules could make use of it.
I've hit the limit of what I can do alone. I'd like to see this incorporated into the bleadperl trunk so it can get some cross-platform testing.
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