The goal of this page is to show you how to run an OpenMoko development image on your host x86 development machine in a chrooted environment.
Build an image
First, you should use Building OpenMoko using the MokoMakefile to build an openmoko-devel-image for your host architecture (x86 in our case). Make sure you put the moko makefile in /home/moko/Makefile .
Prior to that, edit your build/conf/local.conf to make it look like this:
MACHINE = "qemux86"
DISTRO = "openmoko"
BUILD_ARCH = "i686"
INHERIT += " devshell"
SRCDATE_eds-dbus = "now"
Once you have built the image, you can start working toward running the image.
Setup the image filesystem
The filesystem of the image can be found at /home/moko/build/tmp/rootfs . It is that image that we want to run in a chrooted environment.
We will copy that that rootfs directory somewhere so that subsquent builds (using the MokoMakefile for instance) don't overwrite it.
Make sure you have root privileges:
su -
Copy the rootf into a directory called MokoBox. From now on, we will call the chrooted environment a MokoBox.
cp -r /home/moko/build/tmp/rootfs /home/moko/mokobox
make sure /dev and /proc of the host machine are visible from within mokobox
mount --bind /dev /homo/moko/mokobox/dev
mount -t proc none /home/moko/mokobox/proc
start the mokobox
chroot /homo/moko/mokobox /bin/sh
In chroot'ed environment
set environment variables
DISPLAY=:1
LANG=C
HOME=/home/root
export DISPLAY LANG HOME
Create pango.modules file
pango-querymodules > /etc/pango/pango.modules
Create gdk-pixbuf.loaders file
gdk-pixbuf-query-loaders > /etc/gtk-2.0/gdk-pixbuf.loaders
Remove touch screen calibrator. Since touch screen hardware is not present, the touch screen calibration prevents X start-up on PC.
rm /etc/X11/Xsession.d/30xTs_Calibrate
Starting the nested X server
Supplying fonts
You might need to install fonts supplied by OpenMoko to your host system. The easiest way to do is in Gnome is to go Preferences -> Font - > Details -> Go to font folder and then drag and drop TTF font files from build/tmp/rootfs/usr/share/fonts/ in Nautilus.
Launching Xephyr
In another terminal (not related to mokobox), start Xephyr
Xephyr :1 -ac -2button -host-cursor -screen 480x640
Now, back in chroo'ted environment, start X client:
eval $(dbus-launch)
/etc/X11/Xsession
You should see OpenMoko booting in the Xephyr window.
A sample script
The following script sets up the most of root fs environment automatically
#!/bin/bash
#
# Set-up x86 OpenMoko root jail. This script must be run as root.
#
# Root jail is an environment, where the file system root has been
# changed to the OpenMoko root file system folder. Please don't
# use the build/rootfs, but make a copy of it, since build/rootfs
# gets overwritten each time you build openmoko-devel-image
#
# You need to set-up another X server (nested preferably) to
# act as a OpenMoko screen. Otherwise chrooted applications are executed
# as is on the host hardware and the kernel.
#
# See:
#
# http://wiki.openmoko.org/wiki/Getting_OpenMoko_working_on_host_with_Xephyr
#
#
# 2007 Mikko Ohtamaa - Red Innovation Ltd.
# <mikko@redinnovation.com>
#
# Do anything you wish with this script
#
#
#
# Setup required environment variables
# Xephyr must listen to this DISPLAY
DISPLAY=:1
# If we don't have locale, applications refuse to launch
LANG=C
# We are running as root in our chrooted environment
HOME=/home/root
export DISPLAY LANG HOME
# Update pango modules
pango-querymodules > /etc/pango/pango.modules
# Update icon images
gdk-pixbuf-query-loaders > /etc/gtk-2.0/gdk-pixbuf.loaders
# Mount /dev and /proc file systems
mount --bind /dev ./dev
mount -t proc none ./proc
# Remove touch screen calibration start up app
# It doesn't launch on x86 and prevents X booting
if [ -e /etc/X11/Xsession.d/30xTs_Calibrate ] ; then
rm /etc/X11/Xsession.d/30xTs_Calibrate
fi
# Use host name server information so that
# web browsing works
cp /etc/resolv.conf etc/resolv.conf
# Enter into chroot jail
chroot . /bin/sh