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Date: Fri, 27 Nov 2015 09:31:37 +0200
From: Eli Zaretskii <eliz AT gnu DOT org>
Subject: Re: [h-e-w] cygwin-64 2.3.1. bash fails when running under FSF	emacs 24.5
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To: Dominique de Waleffe <ddewaleffe AT gmail DOT com>
Cc: cygwin AT cygwin DOT com, help-emacs-windows AT gnu DOT org
Reply-to: Eli Zaretskii <eliz AT gnu DOT org>
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References: <834mgax9lj DOT fsf AT gnu DOT org> <20151126135158 DOT GO2755 AT calimero DOT vinschen DOT de> <CAJVzMuVgWbTer8z4xT00_Uh6asKGvLVqrm2W2cK_6pDUMxJgLg AT mail DOT gmail DOT com> <87bnag4p58 DOT fsf AT Rainer DOT invalid> <CAJVzMuVMkTza1hdJK0p1rr2_FQbizRV3PBnQmwUh+_bsqKpeWw AT mail DOT gmail DOT com> <CAJVzMuVku4kqRxEnnFEE+=CXyfYG1kb8aSS9x5qRSkiN_rkJcQ AT mail DOT gmail DOT com>

> Date: Thu, 26 Nov 2015 22:20:18 +0100
> From: Dominique de Waleffe <ddewaleffe AT gmail DOT com>
> 
> So... started my homework... Got fresh w10 vm, put cygwin64 and both
> versions of emacs 24.4 and 24.5 from fsf ftp onto it....
> 
> And trying to start bash as shell fails under both  versions!
> 
> => I was mistaken in the origin of my instance of 24.4 (it must have
> come from another source, and I do not remember which)....
>      It says: GNU Emacs 24.4.1 (x86_64-w64-mingw32)  of 2014-10-21 on KAEL
> 
> => both versions from fsf ftp appear to be compiled using mingw
>      GNU Emacs 24.5.1 (i686-pc-mingw32) of 2015-04-11 on LEG570
>      GNU Emacs 24.4.1 (i686-pc-mingw32) of 2014-10-24 on LEG570
> 
> So the difference seems to be in the difference of mingw compilation mode.
> 
> That's as far as I got tonight. Maybe someone has knowledge to share
> about the cause and what to do about this?

I'd say this is somehow related to 64-bit Cygwin programs being run by
32-bit native Windows programs.  The version which works for you is a
64-bit executable, those that don't are 32-bit.

Maybe there are compatibility issues vis-à-vis 64-bit Cygwin.

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