Tag Archives: Kernel

Building RPM Kernel Packages

Extract and customize the kernel

1. Log in as root, extract the kernel sources:

tar jxf linux-.tar.bz2 -C /usr/src

2. Customize the kernel with make menuconfig, make xconfig, etc… Create two copies of the .config file and save them in /usr/src/linux<version>-:

.config: this copy has to provide the configuration for the single processor kernel
.config_smp: this copy has to provide the configuration the dual processor (SMP) kernel

3. Copy the linux<version>-.tar.bz2 you downloaded in /usr/src/redhat/SOURCES/

4. Copy my_kernel.spec in /usr/src/redhat/SPECS/

5. Customize the fields Version, Release, description and kernel24 definition in my_kernel.spec. Please note that:

Version has to be the kernel version (e.g. “2.4.33”)
Release should be customized (e.g. “xeon_1.0”). Release will be used for the “EXTRAVERSION” variable in the main kernel Makefile, so you should get at the end that the output of “uname -r” is exactly Version-Release (in this case “2.4.33-xeon_1.0” and “2.4.33-xeon_1.0smp” for the SMP version).
Set kernel24 1 if you are compiling a 2.4 kernel, 0 if it is a 2.6 kernel.

Rebuild the kernel

To recompile the kernel:

rpm -ba /usr/src/redhat/SPECS/my_kernel.spec

or:

rpmbuild -ba /usr/src/redhat/SPECS/my_kernel.spec

You should get two binary packages (kernel-* and kernel-smp-*) in: /usr/src/redhat/RPMS/i386/

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My LUG Articles

I sent two articles for the LUG-cochin and they are published in the LUG website. Here are the links.

1. Custom Kernel Compilation, the Ubuntu way.

2. Making Custom Ubuntu Live CD’s.

Hope these articles may help you.

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