Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 1 Mar 2002 16:08:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 1 Mar 2002 16:08:22 -0500 Received: from air-2.osdl.org ([65.201.151.6]:10766 "EHLO osdlab.pdx.osdl.net") by vger.kernel.org with ESMTP id ; Fri, 1 Mar 2002 16:08:06 -0500 Date: Fri, 1 Mar 2002 13:01:39 -0800 (PST) From: "Randy.Dunlap" X-X-Sender: To: Andreas Ferber cc: Linux Kernel Mailing List Subject: Re: How to check the kernel compile options ? In-Reply-To: <20020226073027.A20261@devcon.net> Message-ID: MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="346823425-89287989-1015016499=:7850" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. Send mail to mime@docserver.cac.washington.edu for more info. --346823425-89287989-1015016499=:7850 Content-Type: TEXT/PLAIN; charset=US-ASCII On Tue, 26 Feb 2002, Andreas Ferber wrote: | On Sat, Feb 23, 2002 at 08:02:24AM +0100, Andreas Ferber wrote: | | > At the moment I'm just writing a tool which does all parts in one turn | > (using zlib), to make it faster and more robust (the script above may | > fail for example if the kernel image has more than one block of gzip | > compressed data embedded). (It's actually working already, but the | > code needs some heavy cleanup before it can be released to the public | > ;-) Come back in a few days for news... | | Here we go again. Attached to this mail you find the announced kernel | config extractor. It is also available via HTTP: | | http://www.myipv6.de/patches/kconfig/dumpkconfig.c Good! and here's an alternative, which doesn't put .config in /proc/ at all, although that's probably better for some environments or people. This patch (along with the attached 'binoffset.c' program, which I didn't stick into linux/scripts/) gives one the option to have the kernel .config file saved in the kernel image file (as __initdata) and then use 'extract-ikconfig' to read it from the kernel image file and re-use it. Notes: 1. I didn't zip any of the text since kernel Makefiles (can) do that on the entire image. 2. I haven't stripped the leading "CONFIG_" from .config lines. 3. I strip out (omit) all lines *except* those that begin with "CONFIG_" or "# CONFIG_". Keeping the commented CONFIG_ lines keeps make oldconfig happy. Otherwise one has to answer for all unspecified CONFIGs, or use "yes n | make oldconfig" [which is just as good IMHO, but some users might want to know about new kernel config options]. 4. The output file from 'extract-ikconfig' contains the CONFIG_ data in reversed order, but oldconfig doesn't care about this. My test case (.config is around 25000 bytes) increased the kernel bzImage file size by about 8 KB. -- ~Randy --346823425-89287989-1015016499=:7850 Content-Type: TEXT/PLAIN; charset=US-ASCII; name="ikconfigv4.patch" Content-Transfer-Encoding: BASE64 Content-ID: Content-Description: Content-Disposition: attachment; filename="ikconfigv4.patch" LS0tIGxpbnV4L2tlcm5lbC9NYWtlZmlsZS5pa2MJU3VuIFNlcCAxNiAyMToy Mjo0MCAyMDAxDQorKysgbGludXgva2VybmVsL01ha2VmaWxlCVRodSBGZWIg MjggMTU6MDg6MjAgMjAwMg0KQEAgLTE5LDYgKzE5LDcgQEANCiBvYmotJChD T05GSUdfVUlEMTYpICs9IHVpZDE2Lm8NCiBvYmotJChDT05GSUdfTU9EVUxF UykgKz0ga3N5bXMubw0KIG9iai0kKENPTkZJR19QTSkgKz0gcG0ubw0KK29i ai0kKENPTkZJR19JS0NPTkZJRykgKz0gY29uZmlncy5vDQogDQogaWZuZXEg KCQoQ09ORklHX0lBNjQpLHkpDQogIyBBY2NvcmRpbmcgdG8gQWxhbiBNb2Ry YSA8YWxhbkBsaW51eGNhcmUuY29tLmF1PiwgdGhlIC1mbm8tb21pdC1mcmFt ZS1wb2ludGVyIGlzDQpAQCAtMzAsMyArMzEsMTQgQEANCiBlbmRpZg0KIA0K IGluY2x1ZGUgJChUT1BESVIpL1J1bGVzLm1ha2UNCisNCitjb25maWdzLm86 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