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bug#8140: 24.0.50; wrong compilation warning

From: Sam Steingold
Subject: bug#8140: 24.0.50; wrong compilation warning
Date: Mon, 28 Feb 2011 10:16:30 -0500
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux)

In GNU Emacs (x86_64-unknown-linux-gnu, X toolkit)
 of 2011-02-28 on tbox
Windowing system distributor `Colin Harrison', version 11.0.60900031
configured using `configure  '--exec-prefix=/opt/emacs/lucid' 
'--prefix=/opt/emacs' '--with-x-toolkit=lucid''

the following code:

(if (eval-when-compile (eq 'w32 window-system))
    (defun foo () ...) ; woe32 definition
    (defun foo () ...)) ; unix definition

(defun bar () ... (foo) ... )

results in this byte-compilation warning:

In end of data:
lib.el:2029:1:Warning: the function `foo' is not known to be defined.

I think the warning is wrong because it should be pretty easy for the
compiler to see that `foo' is always defined.

Sam Steingold (http://sds.podval.org/) on CentOS release 5.3 (Final) X
http://dhimmi.com http://truepeace.org http://www.PetitionOnline.com/tap12009/
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