From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by finch.gentoo.org (Postfix) with ESMTPS id 3942C13832E for ; Tue, 2 Aug 2016 04:34:41 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 3660821C119; Tue, 2 Aug 2016 04:34:27 +0000 (UTC) Received: from ironport2-out.teksavvy.com (ironport2-out.teksavvy.com [206.248.154.181]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 5E53521C06C for ; Tue, 2 Aug 2016 04:34:25 +0000 (UTC) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0CgIgA731xV/4J93mhcgxBUXsU/hXEEAgKBPDwRAQEBAQEBAYEKQQECAoNdAQEDATocGgQKCwshExIPBSU3iCQIDc8WAQEIAgEfizqFDBaDAYEWBZchhk6BKIZQi0SDWSOBZoIuIjEBgkYBAQE X-IPAS-Result: A0CgIgA731xV/4J93mhcgxBUXsU/hXEEAgKBPDwRAQEBAQEBAYEKQQECAoNdAQEDATocGgQKCwshExIPBSU3iCQIDc8WAQEIAgEfizqFDBaDAYEWBZchhk6BKIZQi0SDWSOBZoIuIjEBgkYBAQE X-IronPort-AV: E=Sophos;i="5.13,465,1427774400"; d="scan'208";a="249946609" Received: from 104-222-125-130.cpe.teksavvy.com (HELO waltdnes.org) ([104.222.125.130]) by ironport2-out.teksavvy.com with SMTP; 02 Aug 2016 00:33:51 -0400 Received: by waltdnes.org (sSMTP sendmail emulation); Tue, 02 Aug 2016 00:33:57 -0400 From: waltdnes@waltdnes.org Date: Tue, 2 Aug 2016 00:33:57 -0400 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Re: [was cross-compile attempt] 32bit chroot Message-ID: <20160802043357.GA13328@waltdnes.org> References: <1544697.klPk7OG4O7@dell_xps> <25794541.FjCKaz5n3c@dell_xps> <7581556.2nt05l2rzF@dell_xps> <1481327.xS7HCL6891@dell_xps> <20160801231124.GA9181@gentoo-tp.home> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160801231124.GA9181@gentoo-tp.home> User-Agent: Mutt/1.5.24 (2015-08-30) X-Archives-Salt: 72c5765c-2096-49e0-aeae-1177d10ac50a X-Archives-Hash: c5831ba5e665b336abb53f7a5e325539 On Tue, Aug 02, 2016 at 01:11:24AM +0200, Jeremi Piotrowski wrote > Does it make sense to compile your own versions of these packages > and then binary merge, when portage already contains binary ebuilds > for these packages? (firefox-bin/libreoffice-bin/google-chrome) I've got an underpowered netbook that needs all the help it can get. I build in the VM with... -O2 -march=bonnell -mfpmath=sse -pipe -fomit-frame-pointer -fno-unwind-tables -fno-asynchronous-unwind-tables Even older desktops benefit. One case in point is my former Dell D530 Core2 Duo. When Gentoo had been installed, it could not keep up with the slowest stream of NHL Gamecenter Live. Everything was generic x86 with SSE2 thrown in, from the stage3. After re-emerging system and world optimized for the machine's cpu, it could keep up with not only the lowest quality stream, but a medium-quality stream. So yes, it helps. From http://gentoo-en.vfose.ru/wiki/Safe_Cflags#-march.3Dnative to find out exactly what your cpu is, run the following command on the *TARGET* machine... gcc -march=native -E -v - &1 | grep cc1 Ignore the flag output, which may be over-optimistic. Just look at what it says for "-march=". -- Walter Dnes I don't run "desktop environments"; I run useful applications