Lustre can currently build against Red Hat 2.4 and SuSE 2.6
kernel-source RPMs.  All other kernel-source RPMs are *unsupported* at
this time.

Note that a Lustre-patched kernel is required for building Lustre; in
most cases a kernel-source RPM from your Linux vendor will not contain
the necessary patches.

##
## Instructions for Red Hat 2.4.x kernel-source RPMs
##

1.  kernel.h

Building against a kernel-source RPM requires a special header.  On
Red Hat systems, this file should be automatically created at boot
time, and saved in /boot/kernel.h.

 *** If you are not running Red Hat Linux, or are not booted into the
 *** kernel you are trying to build against, you need to create this
 *** file manually.

 *** If you do not, the Lustre build may fail, or may fail to build
 *** modules that work with your kernel.

Here is an example /boot/kernel.h file.  If you are building on
x86_64, the first defines should be __MODULE_KERNEL_x86_64, etc.  The
other defines should be simple to figure out.

/* This file is automatically generated at boot time. */
#ifndef __BOOT_KERNEL_H_
#define __BOOT_KERNEL_H_

/* Kernel type i686-smp */

#ifndef __MODULE_KERNEL_i686
#define __MODULE_KERNEL_i686 1
#endif

#ifndef __BOOT_KERNEL_ENTERPRISE
#define __BOOT_KERNEL_ENTERPRISE 0
#endif

#ifndef __BOOT_KERNEL_BIGMEM
#define __BOOT_KERNEL_BIGMEM 0
#endif

#ifndef __BOOT_KERNEL_HUGEMEM
#define __BOOT_KERNEL_HUGEMEM 0
#endif

#ifndef __BOOT_KERNEL_SMP
#define __BOOT_KERNEL_SMP 1
#endif

#ifndef __BOOT_KERNEL_UP
#define __BOOT_KERNEL_UP 0
#endif

#endif

You should save this somewhere, and pass the location of this file to
./configure using the --with-kernel-source-header option.

2.  .config

You will also need to tell Lustre about the .config file for your
kernel.  The two likely locations of this file are
/boot/config-$(uname -r), and /usr/src/linux-2.4/configs/.  You should
pass the location of this file to Lustre using the --with-linux-config
option.

3.  An Example

Here is an example for configuring Lustre:

./configure --with-linux=/usr/src/linux-2.4.20-28.9_lustre.1.0.3 \
--with-kernel-source-header=/boot/kernel.h \
--with-linux-config=/boot/config-2.4.20-28.9_lustre.1.0.3smp

##
## Instructions for SuSE 2.6.x kernel-source RPMs
##

1.  kernel-syms

In addition to the kernel-source rpm, you may need to install a
kernel-syms rpm.  This should be included where you got your kernel
rpm.

2.  linux-obj

You will need to choose the correct linux-obj directory for your
machine.  They will be located in /usr/src/linux-$(uname
-r)-obj/$ARCH/$FLAVOR.  Lustre should be configured with the
--with-linux-obj option.

3.  Example

Here is an example for configuring Lustre:

./configure --with-linux=/usr/src/linux-2.6.5-7.97 \
--with-linux-obj=/usr/src/linux-2.6.5-7.97-obj/ppc64/pseries64