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.

== The OLPC kernel git repository ==

The OLPC kernel git repository can be checked out with the following command:

<pre>
git clone git://dev.laptop.org/olpc-2.6
</pre>

Alternatively, SRPMs are available at

http://dev.laptop.org/~dilinger/SRPMS/

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

== Building the git repository ==

After doing a checkout, one can build the git repository using the standard linux build process (ie, make oldconfig; make; make install). The recommended default config file is in the root of the git repository (.config).

== 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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