GNU bug report logs - #20484
25.0.50; Directory tracking in ansi-term broken.

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Message #211 received at 20484 <at> debbugs.gnu.org (full text, mbox):

From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Phillip Lord <phillip.lord <at> russet.org.uk>,
 Emacs-Devel devel <emacs-devel <at> gnu.org>
Cc: 20202 <at> debbugs.gnu.org, Stefan Monnier <monnier <at> iro.umontreal.ca>,
 20484 <at> debbugs.gnu.org
Subject: Re: EMACS=t Joy and Happiness
Date: Thu, 24 May 2018 15:03:56 -0700

Bash 4.4 came out only in September 2016, and it's too soon to assume 
it. For example, my students regularly use Emacs on a server running 
RHEL 7, which ships Bash 4.2.46, and as I understand it, this is the 
most recent RHEL available.

How about this idea: At Emacs build time, we check whether Bash is 4.4 
or later, and if so we use a term.el that assumes bash 4.4 or later. 
Otherwise, we use a term.el that interrogates the shell dynamically for 
whether it is shell and if so what its version number is, the first time 
that Emacs runs a process under a shell.

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