From: Paul Eggert <eggert@cs.ucla.edu>
To: Eli Zaretskii <eliz@gnu.org>
Cc: teika@gmx.com, 33847@debbugs.gnu.org,
Gnulib bugs <bug-gnulib@gnu.org>,
larsi@gnus.org, ulm@gentoo.org
Subject: bug#33847: 27.0.50; emacsclient does not find server socket
Date: Sun, 25 Jul 2021 09:22:06 -0700 [thread overview]
Message-ID: <a0688fd6-9e73-73d8-6138-3280981abcb5__30436.6376296215$1627230195$gmane$org@cs.ucla.edu> (raw)
In-Reply-To: <83a6maykcf.fsf@gnu.org>
On 7/24/21 11:32 PM, Eli Zaretskii wrote:
>> No modules are affected by the --disable-year2038 option on MS-Windows.
It turns out that I was wrong about that. (I don't normally look at the
MS-Windows part of Gnulib and misunderstood some of the code I was
reading.) Please see gnulib/m4/year2038.m4 for details. This file is in
the patches I sent, or you can see it directly here:
https://git.savannah.gnu.org/cgit/gnulib.git/tree/m4/year2038.m4
This code knows about MS-Windows, Mingw, _USE_32BIT_TIME_T,
__MINGW_USE_VC2005_COMPAT, and so forth, and attempts to do the right
thing. As near as I can make out it should work for the scenario you
describe, but I don't use MS-Windows so I could well be wrong. If I'm
wrong and this code doesn't do what you want, I suggest contacting
bug-gnulib to alert Bruno Haible, who wrote that part of the code. I'll
cc bug-gnulib so that Bruno sees this email. (Bruno, this discussion is
at <https://bugs.gnu.org/33847#161>.)
Here's some more background. There are two Gnulib modules involved.
The largefile module ensures that a program can open/stat/etc. all
files, by widening types like off_t, dev_t and time_t if necessary. If
it finds that time_t is narrower than what the system can support, it
attempts to widen time_t; if this attempt fails it issues a warning but
continues.
The year2038 module is stricter: it insists that time_t be at least 64
bits and aborts 'configure' otherwise. (Strictly speaking, it should
insist only on at least 33 bits (or 32 bits unsigned); I suppose I
should look into fixing that.)
The Emacs patches that I sent do not use the year2038 module, because I
expected that you wouldn't want to worry about the year 2038. The
year2038 module is used by GNU packages like coreutils where Y2038 is a
problem even now, due to the long lead times and lack of updatability on
systems that use these other GNU packages.
> So therefore my question seems to be even more important than I
> thought, and I'm still asking which Gnulib modules are affected by
> this, because I'd need to audit them carefully to see whether the
> 32-bit MS-Windows build with mingw.org's MinGW could be affected.
There should be no need to audit, because Gnulib still supports
platforms that have only 32-bit time_t.
Gnulib is agnostic about time_t width, and is supposed to work even if
time_t is 40 bits (which it is on a very few mainframes) or any other
width. We regularly test it only on 32- and 64-bit time_t, though.
next prev parent reply other threads:[~2021-07-25 16:22 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-23 9:48 bug#33847: 27.0.50; emacsclient does not find server socket Ulrich Mueller
2018-12-23 16:20 ` Ulrich Mueller
2018-12-25 21:02 ` Paul Eggert
2018-12-25 23:29 ` Ulrich Mueller
2018-12-26 0:24 ` Paul Eggert
2018-12-26 2:27 ` Ulrich Mueller
2018-12-26 6:59 ` Paul Eggert
2018-12-26 15:14 ` Ulrich Mueller
2018-12-26 18:32 ` Paul Eggert
2018-12-28 6:37 ` Ulrich Mueller
2018-12-30 6:47 ` Paul Eggert
2018-12-27 3:38 ` Richard Stallman
2018-12-27 16:42 ` Paul Eggert
2018-12-27 17:13 ` Paul Eggert
2018-12-28 6:19 ` Ulrich Mueller
2018-12-28 6:35 ` Paul Eggert
2018-12-28 6:51 ` Ulrich Mueller
2018-12-30 6:44 ` Paul Eggert
2019-01-20 17:59 ` Ulrich Mueller
2019-02-10 8:37 ` Ulrich Mueller
2019-02-10 9:48 ` Eli Zaretskii
2020-08-19 11:05 ` Lars Ingebrigtsen
2020-08-21 21:28 ` Paul Eggert
2020-08-22 7:24 ` Ulrich Mueller
2020-08-22 7:33 ` Andreas Schwab
2020-08-22 7:45 ` Ulrich Mueller
2020-08-22 8:00 ` Eli Zaretskii
2020-08-22 17:51 ` Paul Eggert
2020-08-22 7:59 ` Eli Zaretskii
2020-08-22 17:55 ` Paul Eggert
2020-08-22 18:30 ` Eli Zaretskii
2020-08-22 21:20 ` Paul Eggert
2020-08-23 5:41 ` Eli Zaretskii
2021-07-22 13:08 ` Lars Ingebrigtsen
2021-07-22 16:45 ` Eli Zaretskii
2021-07-22 17:05 ` Lars Ingebrigtsen
2021-07-22 17:30 ` Eli Zaretskii
2021-07-23 11:31 ` Lars Ingebrigtsen
2021-07-23 11:38 ` Lars Ingebrigtsen
2021-07-23 23:58 ` Paul Eggert
2021-07-24 6:23 ` Eli Zaretskii
2021-07-24 7:48 ` Paul Eggert
2021-07-24 8:25 ` Eli Zaretskii
2021-07-24 23:31 ` Paul Eggert
2021-07-25 6:32 ` Eli Zaretskii
2021-07-25 16:22 ` Paul Eggert [this message]
[not found] ` <a0688fd6-9e73-73d8-6138-3280981abcb5@cs.ucla.edu>
2021-07-25 16:34 ` Eli Zaretskii
2021-10-04 6:45 ` Paul Eggert
2021-07-25 7:27 ` Eli Zaretskii
2021-07-24 10:11 ` Lars Ingebrigtsen
2021-07-24 19:37 ` Paul Eggert
2021-07-23 11:58 ` Eli Zaretskii
2021-07-22 18:30 ` Ulrich Mueller
2019-04-27 1:41 ` Teika Kazura
2019-04-27 7:56 ` Eli Zaretskii
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