From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Juanma Barranquero Newsgroups: gmane.emacs.bugs Subject: bug#6740: Spurious byte compiler warnings Date: Wed, 28 Jul 2010 00:57:04 +0200 Message-ID: References: <20100727200619.GC2280@muc.de> <20100727212328.GD2280@muc.de> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Trace: dough.gmane.org 1280272076 7316 80.91.229.12 (27 Jul 2010 23:07:56 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 27 Jul 2010 23:07:56 +0000 (UTC) Cc: Dan Nicolaescu , 6740@debbugs.gnu.org To: Alan Mackenzie Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Wed Jul 28 01:07:54 2010 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1OdtFa-0000h8-8L for geb-bug-gnu-emacs@m.gmane.org; Wed, 28 Jul 2010 01:07:54 +0200 Original-Received: from localhost ([127.0.0.1]:55147 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OdtFZ-0000VI-GG for geb-bug-gnu-emacs@m.gmane.org; Tue, 27 Jul 2010 19:07:53 -0400 Original-Received: from [140.186.70.92] (port=33912 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OdtFQ-0000UM-TM for bug-gnu-emacs@gnu.org; Tue, 27 Jul 2010 19:07:46 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OdtFP-0005L4-Cv for bug-gnu-emacs@gnu.org; Tue, 27 Jul 2010 19:07:44 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:55931) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OdtFP-0005Ky-AX for bug-gnu-emacs@gnu.org; Tue, 27 Jul 2010 19:07:43 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1Odt62-0001dz-Hs; Tue, 27 Jul 2010 18:58:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Juanma Barranquero Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-To: owner@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Tue, 27 Jul 2010 22:58:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 6740 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 6740-submit@debbugs.gnu.org id=B6740.12802714386306 (code B ref 6740); Tue, 27 Jul 2010 22:58:02 +0000 Original-Received: (at 6740) by debbugs.gnu.org; 27 Jul 2010 22:57:18 +0000 Original-Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Odt5J-0001df-DJ for submit@debbugs.gnu.org; Tue, 27 Jul 2010 18:57:17 -0400 Original-Received: from mail-bw0-f44.google.com ([209.85.214.44]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Odt5H-0001dZ-UB for 6740@debbugs.gnu.org; Tue, 27 Jul 2010 18:57:16 -0400 Original-Received: by bwz7 with SMTP id 7so3968114bwz.3 for <6740@debbugs.gnu.org>; Tue, 27 Jul 2010 15:57:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:mime-version:received:in-reply-to :references:from:date:message-id:subject:to:cc:content-type :content-transfer-encoding; bh=OT4bTkiR6EhP33nlbLoSabYTwxBUNTRpGjT1vwdd1ew=; b=O0L7EQpOeaQXMCj3cu1BwVDR/QpqB+VnEpMx9oX6itISvg8M28VbTWfj+5h40HGzFv pZkCU4I5ef6hYE3nSNU/HbYqj5c2PckRMh5TgaiuUn8bEd/zjaJ5WhTO+KM2bV6iDRjv fu099/TaV8Dy9lz2O5ecFONmRDIKx+Zlg4wIU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type:content-transfer-encoding; b=VT5jn0hqk3RBIObuSRw2bJlZvsE/DxChGtp9GR5iv/gOH2mwMcH/8+47mB9YsBz/BE bzAAGk6dT61Dbq+2cG/jD0uQlDUqMtHKeKDb4jFNTTk7u38NwDO0qfAZ7r8SQyGxY/rp g7xjOcrWl0AIT2nUTho1X3JeYWh3d6wJI3v4k= Original-Received: by 10.204.140.219 with SMTP id j27mr7234054bku.153.1280271444228; Tue, 27 Jul 2010 15:57:24 -0700 (PDT) Original-Received: by 10.204.180.136 with HTTP; Tue, 27 Jul 2010 15:57:04 -0700 (PDT) In-Reply-To: <20100727212328.GD2280@muc.de> X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Tue, 27 Jul 2010 18:58:02 -0400 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:39001 Archived-At: On Tue, Jul 27, 2010 at 23:23, Alan Mackenzie wrote: > It's a bug that the error message is repeated, at the very least. Yes, likely. > And > the message is most assuredly false because (featurep 'cc-fix) isn't > always false - for example when it's run under XEmacs. Not, in code byte-compiled for Emacs it is always false because (featurep 'xemacs) is false. That means that optimized bytecode is not portable to XEmacs. But I don't think it was before (for a long time). > At the very least, emitting such arcane warnings is unhelpful. =C2=A0Are = there > any circumstances in which such a warning might help a hacker improve his > code? =C2=A0Surely we aren't in the business of making it difficult to ad= apt > code for XEmacs? You make it appear as it if were an attempt to warn about using XEmacs-specific code, but it is not, as Dan has pointed out. The warning is generic, the result of (and X (featurep 'xemacs) Y Z...) =3D> (prog (and X) nil) =3D> (prog X nil) ; IIUC the comments in byte-opt.el... from whence, "value returned from X is unused". > I think it's clear, the only code containing (featurep 'xemacs) is > portable code. The code is portable. The .elc is not. =C2=A0 =C2=A0 Juanma