Odroid xu3 cross compile setup

 

1. 下载安装img并扩展sd卡

http://odroid.in/ubuntu_14.04lts/

download ubuntu-14.04.1lts-lubuntu-odroid-xu3-20150212.img.xz

下载 OS Image flashing tool for

Download and unzip this file.
http://dn.odroid.com/DiskImager_ODROID/Win32DiskImager-odroid-v1.3.zip

 

download 后烧录成功

 SD 卡的安装和扩容

扩充前

root@odroid-desktop:~# df
Filesystem     1K-blocks    Used Available Use% Mounted on
/dev/mmcblk0p2   3150076 2132236    857792  72% /
none                   4       0         4   0% /sys/fs/cgroup
udev              892784       4    892780   1% /dev
tmpfs             178812    1000    177812   1% /run
none                5120       8      5112   1% /run/lock
none              894060      72    893988   1% /run/shm
none              102400      12    102388   1% /run/user
/dev/mmcblk0p1    102182    7714     94468   8% /media/boot

 

默认的镜像剩余大小固定，如使用8/16G SD card时需要对没有分配的空间进行扩容

1. 先把烧录上述image的 SD card 通过USB card reader插入到一个Linux host，然后 fdisk 删除并创建分区

Disk /dev/sdb: 7948 MB, 7948206080 bytes
245 heads, 62 sectors/track, 1021 cylinders, total 15523840 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0003f9f7

Device Boot Start End Blocks Id System
/dev/sdb1 4096 208895 102400 c W95 FAT32 (LBA)
/dev/sdb2 208896 6610943 3201024 83 Linux
root@odroid-desktop:~# fdisk /dev/sdb

208896 为First sector

 

sudo fdisk /dev/mmcblk0
p
(see starting block of p2, e.g. 266240)
d (delete)
2 (partition 2)
n ( new )
p (primary)
2 (partition 2)
266240 (starting block)
<enter> (it will take ending block  as  end partition, so you have entire space)
w (write partitions)

2. 使用该SD卡启动并做resize2fs

oot@odroid-desktop:~# resize2fs /dev/mmcblk0p2
resize2fs 1.42.9 (4-Feb-2014)
Filesystem at /dev/mmcblk0p2 is mounted on /; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 1
The filesystem on /dev/mmcblk0p2 is now 3863424 blocks long.

root@odroid-desktop:~# df
Filesystem     1K-blocks    Used Available Use% Mounted on
/dev/mmcblk0p2  15213368 2139708  12426548  15% /
none                   4       0         4   0% /sys/fs/cgroup
udev              892784       4    892780   1% /dev
tmpfs             178812    1012    177800   1% /run
none                5120       0      5120   0% /run/lock
none              894060      72    893988   1% /run/shm
none              102400      12    102388   1% /run/user
/dev/mmcblk0p1    102182    7714     94468   8% /media/boot
root@odroid-desktop:~# fdisk -l

 

2. 在xu3上编译内核

参考http://odroid.com/dokuwiki/doku.php?id=en:xu3_building_kernel

但是按照下面指示，不能创建 uInitrd ramdisk image in host PC

http://odroid.com/dokuwiki/doku.php?id=en:xu3_building_kernel

所以，builder kernel 只能在odroid上做

Please follow the instructions below to rebuild the Linux Kernel for ODROID.

Those instructions cover native build of the Kernel.

1. Install dependencies: apt-get install build-essential libqt4-dev libncurses5-dev git
2. Clone Repo: git clone –depth 1 https://github.com/hardkernel/linux.git -b odroidxu3-3.10.y odroidxu-3.10.y
 git clone --depth 1 https://github.com/hardkernel/linux.git -b odroidxu3-3.10.y odroidxu3-3.10.y 

1.Configure Kernel: make odroidxu3_defconfig
2.Do changes if you need/want: make menuconfig or make xconfig
3.Build Kernel and Modules: make -j9
4.Install zImage: cp arch/arm/boot/zImage /media/boot
5.Install DTB File: cp arch/arm/boot/dts/exynos5422-odroidxu3.dtb /media/boot
6.Install Modules: make modules_install
7.Copy .config to /boot for initramfs creation: cp .config /boot/config-`make kernelrelease`
8.Create initramfs: update-initramfs -c -k `make kernelrelease`
9.Create uInitrd: mkimage -A arm -O linux -T ramdisk -C none -a 0 -e 0 -n uInitrd -d /boot/initrd.img-`make kernelrelease` /boot/uInitrd-`make kernelrelease`
10.Install new uInitrd: cp /boot/uInitrd-`make kernelrelease` /media/boot/uInitrd
11.reboot: sync && reboot

 

设置代理

sudo vi /etc/apt/apt.conf

Acquire::http::Proxy "http://rootproxy.cypress.com:8080";

sudo apt-get install build-essential libqt4-dev libncurses5-dev

 同步时间

sudo find linux |xargs touch

make -j9

sudo cp arch/arm/boot/zImage /media/boot

.....cp others follow above instructions

reboot

 

制作patch

diff -urN linux-orig/linux/arch/arm/boot/dts/ linux/arch/arm/boot/dts/ >> powerloss.patch

打patch

patch -p1 < powerloss.patch

3. 应用编译　　

odroid 应用编译需要安装hardfloat版本的编译器 

apt-get install gcc-arm-linux-gnueabihf

 

4. 安装交叉编译内核

arm-linux-gnueabihf-gcc-4.6 hello.c -o hello

 

其实这个是不需要的，ramdisk制作的时候还得需要在odroid xu3上

按照参考下载http://dn.odroid.com/ODROID-XU/compiler/arm-eabi-4.6.tar.gz

#arm-eabi- gcc cannot execute binary file

查看文件是elf 64-bit ,Linux 是32bit的

root@rzhou-pc:/opt/arm-eabi-4.6/bin# file arm-eabi-gcc
arm-eabi-gcc: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.15, BuildID[sha1]=0x8017f14da2903b7ff324011e39c63adc9355ed07, stripped

下载32位的交叉编译

https://android.googlesource.com/platform/prebuilts/gcc/linux-x86/arm/arm-eabi-4.6/+/jb-release

tar -zxvf arm-eabi-4.6-jb-release.tar.gz -C toolchain/

安装成功后下载linux源码树

git clone --depth 1 https://github.com/hardkernel/linux.git -b odroidxu3-3.10.y

　　

cd linux
make odroidxu3_defconfig
make