From: Tassilo Horn <tassilo@member.fsf.org>
To: help-gnu-emacs@gnu.org
Subject: Re: How do I remove "reference to free variable" warnings on buffer-local variables?
Date: Mon, 09 Nov 2009 17:45:14 +0100 [thread overview]
Message-ID: <87vdhjk5ph.fsf@thinkpad.tsdh.de> (raw)
In-Reply-To: aa6ede77-acba-4443-b2de-a249b19c4e6c@k4g2000yqb.googlegroups.com
rocky <rocky@gnu.org> writes:
> I have code that uses buffer local variables. I don't want to declare
> this variable global. So how can I remove messages of the form
> "reference to free variable `...' " when I byte compile a file?
This warning indicates, that this variable isn't defvar-ed somewhere in
the code you are compiling. But you can supress those like it's stated
in the manual:
,----[ (info "(elisp)Compiler Errors") ]
| You can tell the compiler that a function is defined using
| `declare-function' (*note Declaring Functions::). Likewise, you can
| tell the compiler that a variable is defined using `defvar' with no
| initial value.
|
| You can suppress the compiler warning for a specific use of an
| undefined variable VARIABLE by conditionalizing its use on a `boundp'
| test, like this:
|
| (if (boundp 'VARIABLE) ...VARIABLE...)
`----
So in your case you could add something like
(or (boundp 'some-variable) (defvar some-variable))
at the top of your file.
HTH,
Tassilo
next prev parent reply other threads:[~2009-11-09 16:45 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-09 15:10 How do I remove "reference to free variable" warnings on buffer-local variables? rocky
2009-11-09 16:45 ` Tassilo Horn [this message]
2009-11-09 17:40 ` How do I remove "reference to free variable" warnings onbuffer-local variables? Drew Adams
2009-11-09 18:58 ` Tassilo Horn
[not found] ` <mailman.10351.1257785158.2239.help-gnu-emacs@gnu.org>
2009-11-09 17:28 ` How do I remove "reference to free variable" warnings on buffer-local variables? rocky
2009-11-09 17:40 ` Pascal J. Bourguignon
2009-11-11 5:09 ` Stefan Monnier
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