ezbox embedded-system study platform

==
Package Content
==
1. bootstrap/ :
  The bootstrap/ directory contains build tools to construct a bootstrap system for ezbox.
  The major part of build tools is from openwrt project(https://dev.openwrt.org/wiki)

2. distro/ :
  The distro/ directory contains distribution-related packages.
  Each distribution has its own purpose, and contains different packages.

3. misc/ :
  This directory stores a lot of nothing, may be removed :-)

4. realtime/ :
  This directory contains real-time patches for Linux kernel.

5. scripts/ :
  This directory contains scripts used by building system.

==
Quick Start
==
  The ezbox sample build is a kuafu distro on ar71xx board.

1. Copy the default.mk.sample to BASE_DIR
	cp default.mk.sample ../default.mk

2. Start to build the kuafu distro
	make kuafu

3. Check the build log in BASE_DIR
	cat ../XXX-kuafu-ar71xx-build.log

==
Build Instructions
==
1. Before building the target system for ezbox, you should select a distro and symbol link the target arch to bootstrap/target/linux directory. Following examples will use distro kuafu and target CPU is ar7240.
	1) Copy bootstrap system source tree to a working directory
		rm -rf bootstrap.ar71xx
		cp -af bootstrap bootstrap.ar71xx

	2) Symbol link target
		ln -s `pwd`/distro/kuafu/target/linux/ar71xx bootstrap.ar71xx/target/linux/ar71xx

	3) Use distro default packages
		cp distro/kuafu/feeds.conf bootstrap.ar71xx/feeds.conf

	4) Use default config for the target distro
		cp distro/kuafu/configs/defconfig-ar71xx bootstrap.ar71xx/.config

2. Set environment variables
	1) Set target device type
		export DEVICE_TYPE=ezbox

	2) Set target arch
		export ARCH=mips

3. Enter working directory and start build
	1) Goto bootstrap.ar71xx/ directory
		cd bootstrap.ar71xx/

	2) Get target distro default packages
		./scripts/feeds update -a

	3) Install all target distro default packages
		./scripts/feeds install -a

	4) Generate fresh config file
		make ARCH=mips oldconfig

	5) Start build, and record output to build.txt
		make DEVICE_TYPE=ezbox V=99 2>&1 | tee build.log

==
CPU Architecture Settings.
==
1. ar71xx
	export ARCH=mips

2. brcm47xx
	export ARCH=mipsel

3. x86
	export ARCH=i386
==
Known issues
==
1. Please set LD_LIBRARY_PATH if it can't find correct libraries for building host tools.
  $ export LD_LIBRARY_PATH="/path/to/your/staging/host/lib:$LD_LIBRARY_PATH"