bug#58224: 29.0.50; "make bootstrap" spuriously warns: "comp.el newer than byte-compiled file"

[Alan Mackenzie]

Hello, Eli and Stefan.

On Sun, Oct 02, 2022 at 20:07:26 +0300, Eli Zaretskii wrote:
> > Date: Sun, 2 Oct 2022 16:46:01 +0000
> > Cc: stefankangas@gmail.com, 58224@debbugs.gnu.org, acm@muc.de
> > From: Alan Mackenzie <acm@muc.de>

> > > > In lread.c I've got:

> > > >   struct timespec epoch_timespec = {(time_t)0, 0}; /* 1970-01-01T00:00 
> > > > UTC */ 

> > > > , which clearly isn't satisfactory.

> > > I'm not sure I follow: why not satisfactory?

> > Don't we build for operating systems with different epochs?

> No, the Epoch is the same for everyone.  It's a Posix notion, AFAIK.

> > > Is mktime the function you are after?

> > Yes thanks!  But it's horribly complicated, involving wierd readings and
> > settings of the TZ environment variable, and so on.

> Not if you are interested in UTC.

> > If a binary zero time would do (as above), maybe it would be
> > satisfactory.  ;-)

> Yes.

OK, that's great!  I've committed a patch, and I'm closing the bug with
this post.

-- 
Alan Mackenzie (Nuremberg, Germanay).