Setting up gitian build environment for ARM

gistfile1.txt

# download Ubuntu Server 14.04 from http://forum.odroid.com/viewtopic.php?f=95&t=15261
# wget ubuntu-14.04lts-server-odroid-xu3-20150725.img.xz


docker run --name gitian_builder --privileged -ti debian:jessie bash

# inside the VM / docker container
apt-get update && apt-get upgrade -y
apt-get install -y qemu qemu-user-static binfmt-support wget xz-utils parted


# download minimal Debian Jessie from http://forum.odroid.com/viewtopic.php?f=96&t=17542

wget -O- http://oph.mdrjr.net/meveric/images/Jessie/Debian-Jessie-1.0~RC2-20151123-XU3.img.xz | xz -d - >jessie.img

dd if=/dev/zero bs=1M count=1024 >>jessie.img
fdisk -lu jessie.img

losetup -f --show jessie.img
losetup -f --show -o $((147456*512)) jessie.img

parted /dev/loop0

## inside parted:
# unit s
# print
## take note of start of 2nd partition (147456s for me)
# rm 2
# mkpart primary 147456s -1s
# unit compact
# print
## should show a ~1.5 GB second partition
# quit

e2fsck -f /dev/loop1
resize2fs /dev/loop1
losetup -d /dev/loop0 /dev/loop1


# mount it on the host
# 147456 was the start sector of the second partition shown by parted

mkdir /jessie_mnt
mount jessie.img -o loop,offset=$((147456*512)),rw /jessie_mnt

# To get everything to work (e.g., network) you need to comment out everything in /jessie_mnt/etc/ld.so.preload before chrooting in. Take care of that now!

cd /jessie_mnt
mount --bind /dev dev/
mount --bind /sys sys/
mount --bind /proc proc/
mount --bind /dev/pts dev/pts
cp /usr/bin/qemu-arm-static usr/bin/

chroot . /bin/bash

# should be in armv7l chroot

Linux server 3.13.0-43-generic #72-Ubuntu SMP Mon Dec 8 19:35:06 UTC 2014 armv7l GNU/Linux