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From: Glenn Morris <rgm@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: byte-compile-maybe-guarded
Date: Sat, 01 Mar 2008 15:07:00 -0500
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Cc: emacs-devel@gnu.org
To: Dan Nicolaescu <dann@ics.uci.edu>
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Dan,


FYI I've restored the code in byte-compile-maybe-guarded that you
commented out 2007-11-10. Without this code, a false warning is
produced in the following case:

foo.el:
(defsubst foo ()
  (if (featurep 'xemacs) (setq foo t)))   ; foo is a free variable
(provide 'foo)

bar.el:
(require 'foo)
(foo)


emacs -Q -batch --eval "(add-to-list 'load-path default-directory)" \
   -f batch-byte-compile bar.el

In toplevel form:
bar.el:2:2:Warning: assignment to free variable `foo'