Getting OpenMoko working on host with Xephyr
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:
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.
Starting the nested X server
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.
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. # <email@example.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