Compile Linux kernel for Beaglebone

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###SourceCode Preparation 1. Get the latest code of beaglebone kernel:

	git clone git://github.com/RobertCNelson/linux-dev.git

2. Check for your cross-compiler:

	$ which arm-linux-gnueabi-gcc
	/media/y/embedded/gcc-linaro-arm-linux-gnueabi-2012.02-20120222_linux/bin/arm-linux-gnueabi-gcc

3. Start a new branch

	$ git checkout origin/am33x-v3.2 -b am33x-v3.2
	Branch am33x-v3.2 set up to track remote branch am33x-v3.2 from origin.
	Switched to a new branch 'am33x-v3.2'

Since the latest kernel has been moved 3.12, we have to checkout am33x-v3.12

	$ git checkout origin/am33x-v3.12 -b am33x-v3.12

You also have to manually download the latest kernel source code from github:

	$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git

###Configure everything before compilation Edit the system.sh file

	$ cp system.sh.sample system.sh

The system.sh should have following lines:

	echo "Using: Cross Compiler"
	CC=arm-linux-gnueabi-
	##For TI: OMAP3/4/AM35xx
	ZRELADDR=0x80008000
	#LINUX_GIT=/home/user/linux-stable/
	LINUX_GIT=/media/x/bbBlack/linux/git/linux-stable/

Then run ./build_kernel.sh to see your kernel is under compiling, you will be prompted to asked “make menuconfig”, choose whatever you want.Wait patiently until all of your compilation is done.
###Install kernel Edit the destination for your installation, edit the file “system.sh”:

	MMC=/dev/mmcblk0 
	# or whatever you found in your own system.

Then you simply input ./tools/install_kernel.sh, you will be asked some questions, answer then and your kernel will be installed to your sd card. Now use the SD card for booting system, you will get a brand-new system. ###Install Filesystem Download the pre-configured filesystems from:

	# For example, download the quantal related image, that's 12.10.
	$ wget http://rcn-ee.net/deb/rootfs/quantal/ubuntu-12.10-console-armhf-2013-07-22.tar.xz
	$ unxz ubuntu-12.10-console-armhf-2013-07-22.tar.xz
	$ tar xvf ubuntu-12.10-console-armhf-2013-07-22.tar

Then insert your SD card, simply input:

	# take BeagleBoneBlack for example:
	$ sudo ./setup_sdcard.sh --mmc /dev/sdX --uboot bone

After setup SD card, using the newly configured SD card for booting up the system, you will get the new system running the pre-configured rootfs.