From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by nuthatch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1GTzTF-0005UL-Fo for garchives@archives.gentoo.org; Sun, 01 Oct 2006 11:26:57 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.13.8/8.13.6) with SMTP id k91BQ5Bf019272; Sun, 1 Oct 2006 11:26:05 GMT Received: from smtp.gentoo.org (smtp.gentoo.org [140.211.166.183]) by robin.gentoo.org (8.13.8/8.13.6) with ESMTP id k91BOE3j009425 for ; Sun, 1 Oct 2006 11:24:14 GMT Received: from localhost (localhost [127.0.0.1]) by smtp.gentoo.org (Postfix) with ESMTP id C8201645E3 for ; Sun, 1 Oct 2006 11:24:13 +0000 (UTC) X-Virus-Scanned: amavisd-new at gentoo.org X-Spam-Score: -2.559 X-Spam-Level: X-Spam-Status: No, score=-2.559 required=5.5 tests=[AWL=0.040, BAYES_00=-2.599] Received: from smtp.gentoo.org ([127.0.0.1]) by localhost (smtp.gentoo.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QdPuf4kPUO63 for ; Sun, 1 Oct 2006 11:24:11 +0000 (UTC) Received: from ciao.gmane.org (main.gmane.org [80.91.229.2]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.gentoo.org (Postfix) with ESMTP id 339B5645EB for ; Sun, 1 Oct 2006 11:24:02 +0000 (UTC) Received: from list by ciao.gmane.org with local (Exim 4.43) id 1GTzQH-0005ht-US for gentoo-dev@gentoo.org; Sun, 01 Oct 2006 13:23:53 +0200 Received: from ip68-230-97-209.ph.ph.cox.net ([68.230.97.209]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 01 Oct 2006 13:23:53 +0200 Received: from 1i5t5.duncan by ip68-230-97-209.ph.ph.cox.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 01 Oct 2006 13:23:53 +0200 X-Injected-Via-Gmane: http://gmane.org/ To: gentoo-dev@lists.gentoo.org From: "Duncan" <1i5t5.duncan@cox.net> Subject: [gentoo-dev] Re: [RFC] CFLAGS paragraph for the GWN Date: Sun, 1 Oct 2006 11:23:37 +0000 (UTC) Message-ID: References: <451ED52E.5030407@bouton.name> <20060930215242.GK26289@curie-int.orbis-terrarum.net> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-dev@gentoo.org Reply-to: gentoo-dev@lists.gentoo.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: ip68-230-97-209.ph.ph.cox.net User-Agent: pan 0.114 (Angry Albatross) Sender: news X-Archives-Salt: 772df770-95eb-4571-aa82-580f7d03fe0f X-Archives-Hash: 80d40485f80160254c8dd714636b2c28 Ryan Hill posted efmrae$jff$1@sea.gmane.org, excerpted below, on Sat, 30 Sep 2006 16:37:05 -0600: > If you want flags that just break > stuff with 4.1 you can include -ftree-vectorize. Could you point me at some info on this one (-ftree-vectorize)? It came up on the amd64 list a week or so ago, when someone asked what I thought of it and why I didn't have it in my cflags (which I had just explained). I said I didn't know enough about it to make a case either way, and as such, didn't choose to use it. However, after a bit of discussion, I decided to add it to my cflags on a very experimental basis. I haven't experienced any issues with it, but then I haven't done any major compiling since then either, only the routine updates. If I had rather more info on it, therefore, particularly on why it might break stuff, I'd be able to pass it on, telling the list and in particular the guy that asked, why it's NOT a good thing to use. Thus, point me at it, if you got it. Even something as simple as a list of bugs traced to it would be useful as something I could point at, if that's what you are basing your remark on. Or does the problem not necessarily apply to amd64? Even knowing that would be useful. I simply don't know anything much at all about it, beyond a generally vague idea that it means using mmx/sse/whatever vector instructions to parallelize loops. TIA. -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman -- gentoo-dev@gentoo.org mailing list