Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932266AbXIJTCe (ORCPT ); Mon, 10 Sep 2007 15:02:34 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754245AbXIJTC0 (ORCPT ); Mon, 10 Sep 2007 15:02:26 -0400 Received: from qb-out-0506.google.com ([72.14.204.229]:6902 "EHLO qb-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752821AbXIJTCZ (ORCPT ); Mon, 10 Sep 2007 15:02:25 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=beta; h=received:from:to:subject:date:user-agent:cc:references:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:message-id; b=iBzKUW/jbkIU9nxSNM0BWlnvXAVVAUmQ3+jv38nBLJrAkKtvE4cyfRTuC/uYkiQihWfZXeZ+xqFw1ErzcWYKe0QIWOSxj9Wl6xjah6KWyGtUwlh+Z4iO2hhpNqMvjsL8mMtWTBT7vUSXKjdu6DZ7GiVHekpE52utr1pf9xsF9IM= From: Denys Vlasenko To: Sam Ravnborg Subject: Re: [PATCH 3/3] build system: section garbage collection for vmlinux Date: Mon, 10 Sep 2007 20:02:15 +0100 User-Agent: KMail/1.9.1 Cc: linux-kernel@vger.kernel.org References: <200709051443.21522.vda.linux@googlemail.com> <200709061155.52661.vda.linux@googlemail.com> <20070910120140.GA29077@uranus.ravnborg.org> In-Reply-To: <20070910120140.GA29077@uranus.ravnborg.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200709102002.15383.vda.linux@googlemail.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1058 Lines: 25 On Monday 10 September 2007 13:01, Sam Ravnborg wrote: > > > > > Doing a normal kernel build will link vmlinux three or four times. > > > If we introduce --gc-sections we should add a preparational link of > > > vmlinux where we use --gc-sections and skip it for the rest of the links > > > assuming that --gc-sections takes some time for ld to do. > > > > Yes, this will speed up things a bit. > > If we do the --gc-sections trick during the preparational link then we do > not use the arch supplied linker script. > Will it be possible to create a dedicated linker script that is valid > for all architectures and which only include the KEEP() directives for > the diverse sections? Unfortunately, -r and --gc-sections don't mix. x86_64-pc-linux-gnu-ld: --gc-sections and -r may not be used together -- vda - 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/