Rebuilding OLPC kernel: Difference between revisions

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#REDIRECT [[Kernel]]
This document describes building an OLPC kernel from the olpc-2.6 git repository or SRPM. You will want to do this on a Fedora Core 6 machine.

== The OLPC kernel sources ==

The first step involves grabbing the kernel sources; either do a 'git clone' of the kernel git repository, or install the kernel SRPM. Both steps are described on the [[Kernel]] page.

Installing the SRPM will place the sources in /usr/src/redhat/SOURCES/olpc-2.6.tar.bz2

== Building the RPM ==

Building the RPM involves downloading the SRPM, installing it, and then running the rpmbuild command. The "dist", "olpc", and "head" macros should be defined when building:

<pre>
# rpm -ivh kernel-2.6.1*-20061026_dc5079fafb767e4olpc1.src.rpm
# rpmbuild -ba --define "dist olpc1" --define "olpc 1" --define "head dc5079fafb767e4" --target=i586 /usr/src/redhat/SPECS/olpc-2.6.spec
</pre>

After the build finishes, the newly build RPMs will be in /usr/src/redhat/RPMS, and the build tree that was used will be in /usr/src/redhat/BUILD. To make quick changes to the source, for example you can:

<pre>
# cd /usr/src/redhat/BUILD/kernel-2.6.18/linux-2.6.18.i586
# vi drivers/video/geode/gxfb_dcon.c
# make
# scp drivers/video/geode/gxfb_dcon.ko testboard:
# ssh testboard "rmmod gxfb_dcon; insmod ./gxfb_dcon.ko"
</pre>

[[Category:Software development]]
[[Category:Developers]]
[[Category:OS]]

Latest revision as of 14:52, 21 February 2011

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