tzcode resync

[Corinna Vinschen]

On Apr 24 17:19, Yaakov Selkowitz wrote:
> Our winsup/cygwin/localtime.cc is a mashup of a very old version of
> upstream tzcode's private.h, tzfile.h, and localtime.c with Cygwin-
> specific patches for getting the timezone from windows as a fallback,
> as well as handling API compatibility with pre-tm_gmtoff binaries.
> 
> The upstream tzcode/tzdata have introduced database changes which
> cannot be read by old code.  Currently, I am building tzdata in the old
> ("rearguard") format to keep compatibility, but at this point we're
> *way* behind upstream and we really should update our code.  Given how
> long it's been though, it's going to be a bit of work.

When I updated localtime.cc back in 2012, I tried to keep it in a format
which allows further updates from the NetBSD version later on.

The last localtime.c update in NetBSD is from 2019.  That should be
sufficient, shouldn't it?

The upstream localtime.c diff from version 1.72 to current 1.122 is
3K lines of code, so it's still a lot of work, probably...


Thanks,
Corinna

-- 
Corinna Vinschen
Cygwin Maintainer