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 1P92NO-000841-Ol for garchives@archives.gentoo.org; Thu, 21 Oct 2010 21:08:47 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id F1043E07DF for ; Thu, 21 Oct 2010 21:08:40 +0000 (UTC) Received: from mx.virtyou.com (mx.virtyou.com [94.23.166.77]) by pigeon.gentoo.org (Postfix) with ESMTP id 26DB6E07A7 for ; Thu, 21 Oct 2010 20:12:10 +0000 (UTC) Received: from weird.localnet (p4FF046EF.dip.t-dialin.net [79.240.70.239]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx.virtyou.com (Postfix) with ESMTPSA id 707004A800C for ; Thu, 21 Oct 2010 22:12:12 +0200 (CEST) From: Alex Schuster To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] gcc upgrade - rebuild everything? Date: Thu, 21 Oct 2010 22:12:00 +0200 User-Agent: KMail/1.13.5 (Linux/2.6.35-tuxonice-r3; KDE/4.5.2; x86_64; ; ) References: In-Reply-To: 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="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201010212212.01454.wonko@wonkology.org> X-Archives-Salt: 7b2da935-ecf6-49ac-8a1b-e5e5826db30c X-Archives-Hash: ce72dddb7f8958bcde12361f737239aa Grant writes: > I just upgraded from gcc-4.4.3-r2 to gcc-4.4.4-r2 and I'm wondering if > I really need to rebuild everything as it says in the guide: > > http://www.gentoo.org/doc/en/gcc-upgrading.xml The guide seems to be wrong here. Rebuilding does not harm, and it makes use of tall the cool new compiler optimizations, but normally it is not necessary. > If not, when is it necessary? Only when the API changes, which happened the last time when gcc went from 3.3 to 3.4, I think. Wonko