From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1O3PTK-0001YK-Tx for garchives@archives.gentoo.org; Sun, 18 Apr 2010 08:03:19 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 90F0FE0A97 for ; Sun, 18 Apr 2010 08:03:18 +0000 (UTC) Received: from mxi2.callplus.net.nz (mx198.callplus.net.nz [202.180.66.198]) by pigeon.gentoo.org (Postfix) with ESMTP id 221D5E08F4 for ; Sun, 18 Apr 2010 07:58:25 +0000 (UTC) Received: from 119-224-48-139.callplus.net.nz (HELO vrooom.localnet) ([119.224.48.139]) by ismtp02.callplus.net.nz with ESMTP; 18 Apr 2010 19:58:16 +1200 From: =?iso-8859-1?q?Fran=E7ois_Bissey?= To: gentoo-science@lists.gentoo.org Subject: Re: [gentoo-science] sage-4.3.5-r1 && sage-core Date: Sun, 18 Apr 2010 19:58:15 +1200 User-Agent: KMail/1.13.2 (Linux/2.6.32-gentoo-r1; KDE/4.4.2; i686; ; ) References: <1271568736.17226.0@pavilion64> In-Reply-To: <1271568736.17226.0@pavilion64> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-science@lists.gentoo.org Reply-to: gentoo-science@lists.gentoo.org MIME-Version: 1.0 Content-Type: Text/Plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Message-Id: <201004181958.15847.f.r.bissey@massey.ac.nz> X-Archives-Salt: 5429a3a0-6ff4-4431-9ada-8258ba952153 X-Archives-Hash: 9393bf35a931cdcd9ba6d06980fa6314 > I tried a variety of things to get Sage to install and adding > > append-flags -fno-strict-aliasing > > to the sage-core ebuild works here. I'm not sure of the impact on ~x86 or > ~pcc. OK third answer, I think this is fine I have that in my cflags both on x86 and ppc. There are a variety of programs out there that just don't take aliasing seriously (or even now about it) so it is not a bad work-around. strict aliasing is usually triggered with various optimization. So I think we will adopt it, at least on amd64 and probably ppc (although I have a feeling most ppc gentooist already have it in their cflags as it is a known offender in ppc-land). Francois