Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753321Ab0K2LM4 (ORCPT ); Mon, 29 Nov 2010 06:12:56 -0500 Received: from gate.crashing.org ([63.228.1.57]:54023 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751936Ab0K2LMy (ORCPT ); Mon, 29 Nov 2010 06:12:54 -0500 Message-ID: <52488.94.211.195.167.1291029121.squirrel@gate.crashing.org> In-Reply-To: <4CF37603.5080301@de.ibm.com> References: <20101129081619.GD5218@cr0.nay.redhat.com> <4CF37603.5080301@de.ibm.com> Date: Mon, 29 Nov 2010 12:12:01 +0100 (CET) Subject: Re: [PATCH] Built kernel without -O2 option From: "Segher Boessenkool" To: "Christian Borntraeger" Cc: =?iso-8859-1?Q?Am=E9rico_Wang?= , "Hui Zhu" , linux-kernel@vger.kernel.org, gdb@sourceware.org, hellogcc@freelists.org, linux-kbuild@vger.kernel.org User-Agent: SquirrelMail/1.4.10a-1.fc6 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Priority: 3 (Normal) Importance: Normal Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 440 Lines: 14 > In essence -O2 just tells gcc to activate a list of optimizations > gcc -Q -O2 --help=optimizers > tells you what. Not quite; see http://gcc.gnu.org/wiki/FAQ#optimization-options . Segher -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/