From: Eli Zaretskii <eliz@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: setevn PATH vs exec-path [was Re: Flyspell error]
Date: Wed, 05 Aug 2009 20:14:44 +0300 [thread overview]
Message-ID: <83iqh2npx7.fsf@gnu.org> (raw)
In-Reply-To: <1e28e3b6-5be0-4d3e-a290-1d18d6812ed2@u16g2000pru.googlegroups.com>
> From: Xah Lee <xahlee@gmail.com>
> Date: Tue, 4 Aug 2009 15:06:35 -0700 (PDT)
>
> So, the system's PATH env var and emacs exec-path needs not to be the
> same, and ideally their values probably shouldn't be identical if one
> is a control freak, since they serve different purposes.
Actually, my advice is to have them both identical (well, actually,
equivalent, not identical, because one is a list while the other is a
string). That's because exec-path is used when Emacs invokes programs
directly (e.g., via `call-process') while PATH is used indirectly when
Emacs invokes programs via the shell, like in "M-x compile" or "M-x grep".
In the latter case, the shell will look for programs along PATH.
If your values are not equivalent, some Emacs commands that invoke
subsidiary programs will mysteriously fail, and unless you know very
well which Emacs command uses the shell and which does not, you will
have hard time figuring out how to set them correctly.
Of course, if PATH is modified before Emacs is started, then exec-path
will be automatically equivalent to PATH, because it's computed from
PATH's value.
next prev parent reply other threads:[~2009-08-05 17:14 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-01 0:06 Flyspell error sam jesse
2009-08-01 7:29 ` Eli Zaretskii
2009-08-01 8:53 ` sam jesse
2009-08-01 10:01 ` Eli Zaretskii
[not found] ` <mailman.3634.1249120899.2239.help-gnu-emacs@gnu.org>
2009-08-01 10:13 ` Richard Riley
[not found] ` <mailman.3635.1249129213.2239.help-gnu-emacs@gnu.org>
2009-08-01 21:58 ` Xah Lee
2009-08-02 7:10 ` sam jesse
[not found] ` <mailman.3687.1249222316.2239.help-gnu-emacs@gnu.org>
2009-08-02 20:02 ` Xah Lee
2009-08-02 20:28 ` Richard Riley
2009-08-03 0:08 ` Xah Lee
2009-08-03 0:10 ` Xah Lee
2009-08-03 20:51 ` sam jesse
2009-08-03 20:54 ` sam jesse
2009-08-03 22:21 ` Xah Lee
2009-08-03 23:12 ` sam jesse
[not found] ` <mailman.3801.1249343719.2239.help-gnu-emacs@gnu.org>
2009-08-04 2:17 ` Xah Lee
2009-08-04 4:44 ` sam jesse
2009-08-04 17:34 ` suvayu ali
2009-08-04 18:10 ` Eli Zaretskii
[not found] ` <mailman.3862.1249407393.2239.help-gnu-emacs@gnu.org>
2009-08-04 18:57 ` Xah Lee
[not found] ` <mailman.3868.1249409494.2239.help-gnu-emacs@gnu.org>
2009-08-04 19:02 ` Xah Lee
2009-08-04 21:29 ` sam jesse
2009-08-04 22:06 ` setevn PATH vs exec-path [was Re: Flyspell error] Xah Lee
2009-08-05 5:52 ` Lennart Borgman
[not found] ` <mailman.3919.1249451575.2239.help-gnu-emacs@gnu.org>
2009-08-05 12:40 ` Xah Lee
2009-08-05 17:14 ` Eli Zaretskii [this message]
2009-08-05 17:25 ` Drew Adams
[not found] ` <mailman.3953.1249492495.2239.help-gnu-emacs@gnu.org>
2009-08-05 23:51 ` Xah Lee
2009-08-07 9:30 ` Eli Zaretskii
[not found] ` <mailman.4107.1249637430.2239.help-gnu-emacs@gnu.org>
2009-08-07 11:43 ` Xah Lee
[not found] ` <mailman.3916.1249445924.2239.help-gnu-emacs@gnu.org>
2009-08-05 7:03 ` Flyspell error Xah Lee
2009-08-05 7:07 ` Anselm Helbig
2009-08-05 17:46 ` sam jesse
2009-08-06 7:48 ` sam jesse
2009-08-02 21:21 ` Lennart Borgman
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