bug#33847: 27.0.50; emacsclient does not find server socket

[Eli Zaretskii <eliz@gnu.org>]

> Cc: larsi@gnus.org, teika@gmx.com, 33847@debbugs.gnu.org, ulm@gentoo.org,
>  Gnulib bugs <bug-gnulib@gnu.org>
> From: Paul Eggert <eggert@cs.ucla.edu>
> Date: Sun, 25 Jul 2021 09:22:06 -0700
> 
> 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>.)

Thanks, I will take a look, although I now understand it isn't urgent,
since Emacs doesn't (yet) use the year2038 module.

> > 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.

Thanks, that's good to know.