chroot測試SDK出現cat /proc/cpuinfo錯誤

用chroot測試SDK，make時出現下面的錯誤
cat: /proc/cpuinfo: No such file or directory

解決，

sudo mount --bind /proc <chroot dir>/proc

Build openWRT Image

1. sudo tar -Jxv -f xxx-openwrt-sdk-xxx.tar.bz2  
2. apt-get install subversion
   apt-get install wget
   apt-get install libncurses5-dev
   apt-get install zlib1g-dev
   apt-get install gawk
   apt-get install unzip
   apt-get install python
   apt-get install git
   apt-get install file 
3. git init
4. cp util-linux-2.24.1.tar.xz到dl目錄
5. make menuconfig 
6. make V=s (第一次要連網)

P.S.

1. 因util-linux-2.24.1.tar.xz已從server拿掉，自行下載copy到dl目錄。
2. 遇到底下錯誤要先做git init
   ramips_mt7621/base-files/ipkg-ramips_24kec/base-files/etc/banner
   cat: /home/work/openwrt-sdk/build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/linux-ramips_mt7621/base-files/ipkg-ramips_24kec/base-files/etc/sdk.version: No such file or directory

Build openWRT發生base-files/etc/sdk.version: No such file or directory

下"git init"即可解決

測試SDK是否能在不同版本的Ubuntu使用(chroot)

使用chroot測試

1. sudo apt-get install schroot debootstrap
2. 增加下面描述至/etc/schroot/schroot.conf
   [xenial]
   description=Ubuntu Xenial (LTS)
   directory=/home/XXX/xenial
   users=XXX        //主體使用者名稱
   groups=XXX      //主體使用者群組
   root-groups=root
   aliases=unstable,default
3. mkdir /home/XXX/xenial
4. sudo debootstrap --variant=buildd --arch amd64 xenial /home/XXX/xenial http://archive.ubuntu.com/ubuntu/
   or
   sudo debootstrap --arch amd64 xenial /home/XXX/xenial http://archive.ubuntu.com/ubuntu/
5. sudo mkdir /home/XXX/xenial/home/XXX
6. schroot -c xenial -u XXX
7. exit
8. 安裝sudo and language
   sudo chroot /home/XXX/xenial
   apt-get install sudo
   export LANGUAGE=en_US.UTF-8
   export LANG=en_US.UTF-8
   export LC_ALL=en_US.UTF-8
   locale-gen en_US.UTF-8
   dpkg-reconfigure locales
   exit
9. 增加user and group
   sudo chroot /home/XXX/xenial /bin/bash
   groupadd XXX
   useradd -g XXX XXX
   passwd XXX
   exit 

Ubuntu 10.04
sudo debootstrap --arch amd64 --keyring=/etc/apt/trusted.gpg lucid /home/victor/Workspace/hisilicon http://old-releases.ubuntu.com/ubuntu/

Bind Filesystem
/etc/fstab
/dev /home/XXX/xenial/dev auto bind 0 0
/dev/pts /home/XXX/xenial/dev/pts auto bind 0 0
/proc /home/XXX/xenial/proc auto bind 0 0