GNU bug report logs - #28264
Accessing source directory through symlink produces false warnings

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Paul Eggert <eggert <at> cs.ucla.edu>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#28264: closed (Accessing source directory through symlink
 produces false warnings)
Date: Tue, 29 Aug 2017 04:58:01 +0000

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Your message dated Mon, 28 Aug 2017 21:57:15 -0700
with message-id <6cd94296-2dd5-ac88-185b-ed7d5d8e5533 <at> cs.ucla.edu>
and subject line Re: bug#28264: Accessing source directory through symlink produces false warnings
has caused the debbugs.gnu.org bug report #28264,
regarding Accessing source directory through symlink produces false warnings
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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From: Glenn Morris <rgm <at> gnu.org>
To: submit <at> debbugs.gnu.org
Subject: Accessing source directory through symlink produces false warnings
Date: Mon, 28 Aug 2017 14:25:20 -0400

Package: emacs
Version: 26.0.50

Current master (cd0360f) on rhel7.

Emacs sources are in (eg) /tmp/emacs/git/master
cd ~
ln -s /tmp/emacs/git/master
~/master/src/emacs -Q

This results in the following new, spurious warnings:
    
    Warning: arch-dependent data dir '/:/tmp/emacs/git/master/lib-src/':
       No such file or directory
    Warning: Lisp directory '/:/tmp/emacs/git/master/lisp':
       No such file or directory
    
I would suspect recent changes to file name / symlink handling.

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Glenn Morris <rgm <at> gnu.org>, 28264-done <at> debbugs.gnu.org
Cc: Michael Albinus <michael.albinus <at> gmx.de>
Subject: Re: bug#28264: Accessing source directory through symlink produces
 false warnings
Date: Mon, 28 Aug 2017 21:57:15 -0700

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Thanks for the bug report. I reproduced the problem and installed the attached 
patch to fix it. It strikes me, though, that the code still won't work in other 
cases (e.g., symlinks containing ":"), and that Emacs probably has other 
instances of confusion between how it treats symlinks and how the OS treats 
them. I'll CC: this to Michael to give him a heads-up about this particular 
issue, as I'm not really up to speed on magic file names.

[0001-Silence-false-alarms-for-symlinks-to-sources.patch (text/x-patch, attachment)]

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