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
Please see the included help script at the bottom of this article. It should make your life much easier.
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