Setting up a native-compilation toolchain
This page is a brief summary of the cross-compilation discussion on the SamyGO forum. Main contributors to this information are cowenchicken. The information in this page pertains to the building of a toolchain, based on the source code as stored in the file 32B650.zip, available from Samsung.
-This informations are verified on Debian lenny.-
Before start ing, please check this packages are installed on your system: apt-get install deboostrap nfs-kernel-server nfs-common portmap
At on a non-debian system download and install the debootstrap package manually http://ftp.de.debian.org/debian/pool/main/d/debootstrap/
Contents
Installing Debian Lenny in an NFS chroot
First Stage debootstrap
Run the following on your debian based (or debootstrap ready) workstation
debootstrap --verbose --arch armel --foreign lenny /armel-chroot http://ftp.de.debian.org/debian
This gives you first stage linux image to /armel-chroot directory.
NFS export the chroot directory
I use the following options, not really sure all of them are relevant, but they work. edit "/etc/exports" file as /armel-chroot <server-domain, like 192.168.1.0>/255.255.255.0(rw,sync,insecure,no_subtree_check,no_root_squash)
Than execute
exportfs -a
command. This will apply changes to system. You might need restart nfs and portmap services...
export chroot_share=<server>:/path/to/armel-chroot export armel_chroot=/dtv/usb/sda2/armel-chroot mkdir -p $armel_chroot mount -o rw,soft,udp,async,nolock,rsize=32768,wsize=32768 $chroot_share $armel_chroot
Second Stage debootstrap
this one takes a while
export busybox=/dtv/usb/sda2/busybox $busybox chroot $armel_chroot /debootstrap/debootstrap --second-stage
On some Linux distributions like ubuntu, you can get error at:
I: Configuring mount... I: Configuring initscripts... I: Configuring sysvinit... W: Failure while configuring required packages.
If you have this error, than Edit /var/lib/dpkg/info/sysvinit.postinst
#you have to comment them using # in front of them rm -f $INITCTL mkfifo -m 600 $INITCTL
than inside your chroot and run dpkg --configure -a (or something like this), you should get ride of this error and would be able to continue using apt-get/aptitude.
Getting into the chroot
You can use the following script to get into the chroot
#!/bin/sh #options export chroot_share=<server>:/path/to/armel-chroot export armel_chroot=/dtv/usb/sda2/armel-chroot export busybox=/dtv/usb/sda2/busybox #mount the chroot nfs share mount -o rw,soft,udp,async,nolock,rsize=32768,wsize=32768 $chroot_share $armel_chroot #mount some important dirs mount -o bind /dev $armel_chroot/dev mount -o bind /dev/sam $armel_chroot/dev/sam mount -o bind /dev/pts $armel_chroot/dev/pts mount -o bind /proc $armel_chroot/proc mount -o bind /proc/bus/usb $armel_chroot/proc/bus/usb mount -o bind /sys $armel_chroot/sys #bind resolv.conf mount -o bind /etc/resolv.conf $armel_chroot/etc/resolv.conf #start the chroot $busybox chroot $armel_chroot /bin/bash --login #umount umount $armel_chroot/sys umount $armel_chroot/proc/bus/usb umount $armel_chroot/proc umount $armel_chroot/dev/pts umount $armel_chroot/dev/sam umount $armel_chroot/dev umount $armel_chroot/etc/resolv.conf umount $armel_chroot
Installing additional packages within the chroot
Make sure your /etc/apt/sources.list contains the following lines
deb http://ftp.de.debian.org/debian lenny main contrib non-free deb-src http://ftp.de.debian.org/debian lenny main contrib non-free deb http://security.debian.org/ lenny/updates main contrib non-free
Ttan you can install anything you like, e.g.
apt-get update apt-get install strace
