How to compile a kernel suse 1

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You are here: Home » Howtos » Linux » Kernel » How To Compile A Kernel - The SuSE Way

How To Compile A Kernel - The SuSE Way

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Submitted by falko (Contact Author) (Forums) on Sun, 2006-11-19 18:22.
:: Kernel | SuSE

1
tweet How To Compile A Kernel - The
retweet SuSE Way
Version 1.0
Author: Falko Timme <ft [at] falkotimme [dot] com>
Last edited 11/17/2006

Each distribution has some specific tools to build a custom
kernel from the sources. This article is about compiling a
kernel on SuSE systems. It describes how to build a custom
kernel using the latest unmodified kernel sources from
www.kernel.org (vanilla kernel) so that you are independent
www.ManageEngine.com Ads by Google from the kernels supplied by your distribution. It also shows
how to patch the kernel sources if you need features that are
not in there.

I have tested this on SuSE 10.1.

I want to say first that this is not the only way of setting up such a system. There are many ways of achieving
this goal but this is the way I take. I do not issue any guarantee that this will work for you!

1 Preliminary Note
The goal of this tutorial is to build a kernel rpm package that can be installed on the system, and that you can
share with others and install on other SuSE systems which is a big advantage compared to the "traditional" way
where you don't end up with an rpm package.

2 Install Required Packages For Kernel Compilation
We must install ncurses-devel which is needed by the make menuconfig command which we run later on:

yast -i ncurses-devel

Next we must modify a few tools that are needed to build our kernel. If we don't modify them, we will get the
following error message during the kernel build process:

/usr/lib/rpm/find-requires.ksyms: line 12: /usr/bin/nm: Argument list too long

and we won't be able to install our kernel rpm package.

Before we modify the tools, we create backup copies of them:

cp /usr/lib/rpm/find-provides.ksyms /usr/lib/rpm/find-provides.ksyms_orig
cp /usr/lib/rpm/find-requires.ksyms /usr/lib/rpm/find-requires.ksyms_orig
cp /usr/lib/rpm/find-supplements.ksyms /usr/lib/rpm/find-supplements.ksyms_orig

Then we open each of these scripts and replace kernel-*) is_kernel_package=1 ;; with
kernel*) is_kernel_package=1 ;;:

vi /usr/lib/rpm/find-provides.ksyms

4 de 8 02/12/2009 11:43


[...]
#kernel-*) is_kernel_package=1 ;;
kernel*) is_kernel_package=1 ;;
[...]

vi /usr/lib/rpm/find-requires.ksyms

[...]
[...]

vi /usr/lib/rpm/find-supplements.ksyms

[...]
[...]

3 Download The Kernel Sources
Next we download our desired kernel to /usr/src. Go to www.kernel.org and select the kernel you want to
install, e.g. linux-2.6.18.2.tar.bz2 (you can find all 2.6 kernels here: http://www.kernel.org/pub/linux
/kernel/v2.6/). Then you can download it to /usr/src like this:

5 de 8 02/12/2009 11:43


cd /usr/src
wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.18.2.tar.bz2

Then we unpack the kernel sources and create a symlink linux to the kernel sources directory:

tar xjf linux-2.6.18.2.tar.bz2
ln -s linux-2.6.18.2 linux
cd /usr/src/linux

4 Apply Patches To The Kernel Sources (Optional)
Sometimes you need drivers for hardware that isn't supported by the new kernel by default, or you need
support for virtualization techniques or some other bleeding-edge technology that hasn't made it to the kernel
yet. In all these cases you have to patch the kernel sources (provided there is a patch available...).

Now let's assume you have downloaded the needed patch (I call it patch.bz2 in this example) to /usr/src.
This is how you apply it to your kernel sources (you must still be in the /usr/src/linux directory):

bzip2 -dc /usr/src/patch.bz2 | patch -p1 --dry-run
bzip2 -dc /usr/src/patch.bz2 | patch -p1

The first command is just a test, it does nothing to your sources. If it doesn't show errors, you can run the
second command which actually applies the patch. Don't do it if the first command shows errors!

If your patches are compressed with gzip (.gz) instead of bzip2 (.bz2), then you patch your kernel as follows:

gunzip -c /usr/src/patch.gz | patch -p1 --dry-run
gunzip -c /usr/src/patch.gz | patch -p1

You can also apply kernel prepatches to your kernel sources. For example, if you need a feature that is
available only in kernel 2.6.19-rc6, but the full sources haven't been released yet for this kernel. Instead, a
patch-2.6.19-rc6.bz2 is available. You can apply that patch to the 2.6.18 kernel sources, but not to kernel
2.6.18.1 or 2.6.18.2, etc. This is explained on http://kernel.org/patchtypes/pre.html:

Prepatches are the equivalent to alpha releases for Linux; they live in the testing directories in the archives.
They should be applied using the patch(1) utility to the source code of the previous full release with a 3-part
version number (for example, the 2.6.12-rc4 prepatch should be applied to the 2.6.11 kernel sources, not, for
example, 2.6.11.10.)

So if you want to compile a 2.6.19-rc6 kernel, you must download the 2.6.18 kernel sources
(http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.18.tar.bz2) in step 3 instead of kernel 2.6.18.2!

This is how you apply the 2.6.19-rc6 patch to kernel 2.6.18:

cd /usr/src

6 de 8 02/12/2009 11:43


wget http://www.kernel.org/pub/linux/kernel/v2.6/testing/patch-2.6.19-rc6.bz2
cd /usr/src/linux
bzip2 -dc /usr/src/patch-2.6.19-rc6.bz2 | patch -p1 --dry-run
bzip2 -dc /usr/src/patch-2.6.19-rc6.bz2 | patch -p1

How To Compile A Kernel - The SuSE Way - Page 2
How To Compile A Kernel - The SuSE Way - Page 3

next
How To Compile A Kernel - The SuSE Way - Page
2

Copyright © 2006 Falko Timme
All Rights Reserved.

add comment | view as pdf | print: this | all page(s) |

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How To Compile A Kernel - The Fedora Way
How To Compile A Kernel - The Ubuntu Way
Compile Kernel 2.6 under Debian Sarge
Debian-Kernel-Compile-Howto (Kernel 2.6)
Debian-Kernel-Compile-Howto (Kernel 2.4)

Please do not use the comment function to ask for help! If you need help, please use our forum.
Comments will be published after administrator approval.

Thanks!
Submitted by Gorge (registered user) on Sat, 2008-05-10 03:23.

Thank you so much for this tutorial! It was extremely helpful!
reply | view as pdf

Thanks for this great
Submitted by elsint (registered user) on Sat, 2007-05-12 07:36.

Thanks for this great tutorial!!

I compiled my openSUSE Linux 10.2 Kernel without a problem.

As ckelloug mentioned ksyms files are fixed on openSUSE 10.2 and do not need fixing.

Cagdas Cubukcu
reply | view as pdf

Suse 10.2
Submitted by ckelloug (registered user) on Fri, 2007-01-12 17:00.

Note that OpenSuSE 10.2 has fixed the ksyms files described in step 2 so that they are correct. It still might be good to
check them though.
reply | view as pdf

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