Building CyanogenMod 7.2 from source for Samsung Galaxy S2 i9100

	/*
	* author Huber Flores
	*/
	### CyanogendMod7.2
	### Builded in 64 bits Machine with Ubuntu quantal quetzal 12.10
	# Install android SDK
	# Download version x86_64
	# Tutorial http://developer.android.com/sdk/index.html
	### Install dependencies
	$ sudo apt-get update
	$ sudo apt-get install zip build-essential curl git-core \
	python gcc patch flex bison gperf \
	g++ squashfs-tools \
	ia32-libs g++-multilib zlib1g-dev \
	lib32z1-dev lib32ncurses5-dev \
	gcc-multilib libwxgtk2.8-dev \
	tofrodos texinfo mtools ccache \
	gnupg libc6-dev x11proto-core-dev \
	libx11-dev lib32readline-gplv2-dev \
	libgl1-mesa-dev libxml2-utils
	$ sudo apt-get install gnupg flex bison gperf build-essential squashfs-tools \
	zip curl libc6-dev libncurses5-dev:i386 x11proto-core-dev \
	libx11-dev:i386 libreadline6-dev:i386 libgl1-mesa-glx:i386 \
	libgl1-mesa-dev g++-multilib mingw32 tofrodos \
	python-markdown libxml2-utils xsltproc zlib1g-dev:i386
	$ sudo apt-get install git-core gnupg flex bison gperf libsdl1.2-dev libesd0-dev \
	libwxgtk2.8-dev squashfs-tools zip pngcrush schedtool libxml2 xsltproc
	# 64 bits dependecies
	$ sudo apt-get install lib32z1-dev lib32ncurses5-dev lib32readline-gplv2-dev \
	gcc-4.7-multilib g++-4.5-multilib
	# Install java
	# Java SE 1.6 is required (other version, even greater is not accepted by the compiler)
	# Download jdk-6u34-linux-x64.bin
	$ chmod +x jdk-6u34-linux-x64.bin
	$ sudo ./jdk-6u34-linux-x64.bin
	$ sudo mv jdk1.6.0_34 /usr/lib/jvm/
	$ sudo apt-get install update-java
	$ sudo update-java (Choose your java version, if you have more installed)
	### Set up environment (Follow the instructions to have similar environments)
	$ mkdir CyanogenModBuild
	$ cd CyanogenModBuild
	$ mkdir environment
	$ cd environment
	$ mkdir ~/bin
	$ mkdir ~/android/system
	# Install repo command in /bin
	$ curl https://dl-ssl.google.com/dl/googlesource/git-repo/repo > ~/bin/repo
	$ chmod a+x ~/bin/repo
	# Open your bashrc file (in my case)
	$ cd /homer/huber
	$ nano .bashrc
	# add the following line at the end
	export PATH=$PATH:/home/huber/android-linux-x86_64/sdk/platform-tools:/home/huber/Desktop/CyanogenModBuild/environment/bin
	export USE_CCACHE=1
	# Now you can call $ repo and $ adb from any location
	# Initialize repository
	$ cd ./android/system
	$ repo init -u git://github.com/CyanogenMod/android.git -b gb-release-7.2
	# it will take time
	# Once finished, then synchronize repositories (-j16 is for the number of concurrent threads)
	$ repo sync -j16
	# Copy proprietary files from the device
	# Plug the device to your computer
	$ cd ~/android/system/device/samsung/galaxys2/
	$ ./extract-files.sh
	# No missing files or errors should appear. If some files are missing, then you can try to find the missing file by downloading a stable CyanogenMod ROM (http://get.cm/?device=galaxys2&type=stable, cm-7.2.0-galaxys2.zip)
	# Download the ROM Manager
	$ cd ./android/system/vendor/cyanogen/
	$ ./get-rommanager
	# Synchronize again for updates
	$ cd ~/android/system/
	$ repo sync
	# Build CyanogenMod7.2
	$. build/envsetup.sh
	$ brunch galaxys2
	# Possible errors may appear
	1)
	Unknown parameter xmlns for tags/attrs...
	make: *** [out/target/product/galaxys2/obj/STATIC_LIBRARIES/libwebcore_intermediates/WebCore/XMLNSNames.cpp] Error 255
	# [SOLVED]: This is a bug from GCC 4.7, try to downgrade GCC to 4.5 or 4.6.2
	# if you have 4.7 already installed, then install 4.5 or 4.6. Later, switch between compilers with the update-alternatives command, below procedure
	$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.7 47
	$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.6 46
	$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.5 45
	$ sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.7 47
	$ sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.6 46
	$ sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.5 45
	$ sudo update-alternatives --config gcc
	There are 3 choices for the alternative gcc (providing /usr/bin/gcc).
	Selection Path Priority Status
	------------------------------------------------------------
	0 /usr/bin/gcc-4.7 47 auto mode
	* 1 /usr/bin/gcc-4.5 45 manual mode
	2 /usr/bin/gcc-4.6 46 manual mode
	3 /usr/bin/gcc-4.7 47 manual mode
	In short, both, GCC and G++ should have same version (e.g 4.5)
	2)
	# Missing prop files dependecies
	# Extract them from the stable version as discussed before
	3) Cloud issue (Amazon - Generic Ubuntu)
	# The following packages have unmet dependencies:
	# ia32-libs : Depends: ia32-libs-multiarch but it is not installable
	# E: Unable to correct problems, you have held broken packages.
	# [SOLVED]:
	# Enable the installation of i386 packages on your 64 bits system:
	$ dpkg --add-architecture i386
	$ apt-get update
	# Once the compilation process has finished, copy the ROM to your internal sdcard cm-7-20130131-UNOFFICIAL-galaxys2.zip (location:/android/system/out/target/product/galaxys2/)
	### Flash the ROM in the device (Remember to have a backup)
	# Open CWM
	# Choose install zip from internal sdcard
	# Install ROM cm-7-20130131-UNOFFICIAL-galaxys2.zip
	# Wipe factory
	# Wipe cache
	# Restart device

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