From owner-freebsd-hackers@FreeBSD.ORG Thu Aug 7 19:07:06 2008 Return-Path: Delivered-To: hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E0E471065670 for ; Thu, 7 Aug 2008 19:07:06 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from mail35.syd.optusnet.com.au (mail35.syd.optusnet.com.au [211.29.133.51]) by mx1.freebsd.org (Postfix) with ESMTP id 6FE448FC21 for ; Thu, 7 Aug 2008 19:07:06 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from server.vk2pj.dyndns.org (c122-106-215-175.belrs3.nsw.optusnet.com.au [122.106.215.175]) by mail35.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id m77J72xx025920 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 8 Aug 2008 05:07:04 +1000 Received: from server.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by server.vk2pj.dyndns.org (8.14.2/8.14.2) with ESMTP id m77J72F7003209; Fri, 8 Aug 2008 05:07:02 +1000 (EST) (envelope-from peter@server.vk2pj.dyndns.org) Received: (from peter@localhost) by server.vk2pj.dyndns.org (8.14.2/8.14.2/Submit) id m77J7262003208; Fri, 8 Aug 2008 05:07:02 +1000 (EST) (envelope-from peter) Date: Fri, 8 Aug 2008 05:07:02 +1000 From: Peter Jeremy To: "Sean C. Farley" Message-ID: <20080807190701.GJ64458@server.vk2pj.dyndns.org> References: <489B0ACD.80008@kovesdan.org> <489B22BD.5050109@kovesdan.org> <20080807170235.GA39461@eos.sc1.parodius.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="St7VIuEGZ6dlpu13" Content-Disposition: inline In-Reply-To: X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.18 (2008-05-17) Cc: hackers@freebsd.org Subject: Re: strange issue reading /dev/null X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Aug 2008 19:07:07 -0000 --St7VIuEGZ6dlpu13 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2008-Aug-07 12:19:20 -0500, "Sean C. Farley" wrote: >Grr! Optimization should not be a requirement for checking for >uninitialized variables. Yes, gcc adds "fun" to development. This is documented: `-Wuninitialized' Warn if an automatic variable is used without first being initialized or if a variable may be clobbered by a `setjmp' call. These warnings are possible only in optimizing compilation, because they require data flow information that is computed only when optimizing. If you do not specify `-O', you will not get these warnings. Instead, GCC will issue a warning about `-Wuninitialized' requiring `-O'. That explanation makes sense. --=20 Peter Jeremy Please excuse any delays as the result of my ISP's inability to implement an MTA that is either RFC2821-compliant or matches their claimed behaviour. --St7VIuEGZ6dlpu13 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) iEYEARECAAYFAkibR9UACgkQ/opHv/APuIckDgCgjJzNW7N5aZA8oIfQuA6/bjGi tzMAmgKpkJWOiA7R6l/MI9282trNZoFi =xZhr -----END PGP SIGNATURE----- --St7VIuEGZ6dlpu13--