[Samsung Galaxy Nexus] antonio8297:
I'm not responsable for all that you do with your PC and your Nexus.

For first you need a 64-bit PC,with minimum 4GB of RAM and a Dual-core PC,and Ubuntu.

Start with PC configuration.

1) You need the following:

-JDK 6 if you wish to build Kit-Kat.

$ sudo add-apt-repository ppa:webupd8team/java
$ sudo apt-get update && sudo apt-get install oracle-java6-installer

-Python, which you can download from python.org. Or:

$ sudo apt-get install python

-Git, which you can find it at git-scm.com. Or:

$ sudo apt-get install git-core

-Android SDK:

Download the SDK here: http://developer.android.com/sdk/index.html

Extract the SDK and place it in your home directory.

I renamed my SDK to android-sdk to make it easier to navigate to.

Go to your home folder, press Ctrl+H to show hidden files, and open up your .bashrc file.

Add these lines at the bottom of the file:

# Android tools
export PATH=${PATH}:~/android-sdk/tools
export PATH=${PATH}:~/android-sdk/platform-tools
export PATH=${PATH}:~/bin

Find your .profile file and add this at the bottom of the file:

PATH="$HOME/android-sdk/tools:$HOME/android-sdk/platform-tools:$PATH"

You have now successfully installed the Android SDK.

To check for updates issue this into your terminal:

$ android

2) Installing required packages (Ubuntu 13.04+)

$ sudo apt-get install git-core gnupg flex bison gperf build-essential \
zip curl zlib1g-dev zlib1g-dev:i386 libc6-dev lib32ncurses5-dev lib32z1 \
lib32ncurses5 lib32bz2-1.0 x11proto-core-dev libx11-dev:i386 libreadline6-dev:i386 \
lib32z1-dev libgl1-mesa-glx:i386 libgl1-mesa-dev g++-multilib mingw32 tofrodos \
python-markdown libxml2-utils xsltproc readline-common libreadline6-dev libreadline6 \
lib32readline-gplv2-dev libncurses5-dev lib32readline5 lib32readline6 libreadline-dev \
libreadline6-dev:i386 libreadline6:i386 bzip2 libbz2-dev libbz2-1.0 libghc-bzlib-dev \
lib32bz2-dev libsdl1.2-dev libesd0-dev squashfs-tools pngcrush schedtool libwxgtk2.8-dev python lzop
$ sudo ln -s /usr/lib/i386-linux-gnu/mesa/libGL.so.1 /usr/lib/i386-linux-gnu/libGL.so

Installing required packages (Ubuntu 12.04)

$ sudo apt-get install git gnupg flex bison gperf build-essential \
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 ln -s /usr/lib/i386-linux-gnu/mesa/libGL.so.1 /usr/lib/i386-linux-gnu/libGL.so

Installing required packages (Ubuntu 10.04 -- 11.10)

$ sudo apt-get install git-core gnupg flex bison gperf build-essential \
zip curl zlib1g-dev libc6-dev lib32ncurses5-dev ia32-libs \
x11proto-core-dev libx11-dev lib32readline5-dev lib32z-dev \
libgl1-mesa-dev g++-multilib mingw32 tofrodos python-markdown \
libxml2-utils xsltproc

On Ubuntu 10.10:

$ sudo ln -s /usr/lib32/mesa/libGL.so.1 /usr/lib32/mesa/libGL.so

On Ubuntu 11.10:

$ sudo apt-get install libx11-dev:i386

3) Configure your USB.

$ gksudo gedit /etc/udev/rules.d/51-android.rules

Inside of this blank text file insert:

#Acer
SUBSYSTEM=="usb", ATTR{idVendor}=="0502", MODE="0666"

#ASUS
SUBSYSTEM=="usb", ATTR{idVendor}=="0b05", MODE="0666"

#Dell
SUBSYSTEM=="usb", ATTR{idVendor}=="413c", MODE="0666"

#Foxconn
SUBSYSTEM=="usb", ATTR{idVendor}=="0489", MODE="0666"

#Garmin-Asus
SUBSYSTEM=="usb", ATTR{idVendor}=="091E", MODE="0666"

#Google
SUBSYSTEM=="usb", ATTR{idVendor}=="18d1", MODE="0666"

#HTC
SUBSYSTEM=="usb", ATTR{idVendor}=="0bb4", MODE="0666"

#Huawei
SUBSYSTEM=="usb", ATTR{idVendor}=="12d1", MODE="0666"

#K-Touch
SUBSYSTEM=="usb", ATTR{idVendor}=="24e3", MODE="0666"

#KT Tech
SUBSYSTEM=="usb", ATTR{idVendor}=="2116", MODE="0666"

#Kyocera
SUBSYSTEM=="usb", ATTR{idVendor}=="0482", MODE="0666"

#Lenevo
SUBSYSTEM=="usb", ATTR{idVendor}=="17EF", MODE="0666"

#LG
SUBSYSTEM=="usb", ATTR{idVendor}=="1004", MODE="0666"

#Motorola
SUBSYSTEM=="usb", ATTR{idVendor}=="22b8", MODE="0666"

#NEC
SUBSYSTEM=="usb", ATTR{idVendor}=="0409", MODE="0666"

#Nook
SUBSYSTEM=="usb", ATTR{idVendor}=="2080", MODE="0666"

#Nvidia
SUBSYSTEM=="usb", ATTR{idVendor}=="0955", MODE="0666"

#OTGV
SUBSYSTEM=="usb", ATTR{idVendor}=="2257", MODE="0666"

#Pantech
SUBSYSTEM=="usb", ATTR{idVendor}=="10A9", MODE="0666"

#Philips
SUBSYSTEM=="usb", ATTR{idVendor}=="0471", MODE="0666"

#PMC-Sierra
SUBSYSTEM=="usb", ATTR{idVendor}=="04da", MODE="0666"

#Qualcomm
SUBSYSTEM=="usb", ATTR{idVendor}=="05c6", MODE="0666"

#SK Telesys
SUBSYSTEM=="usb", ATTR{idVendor}=="1f53", MODE="0666"

#Samsung
SUBSYSTEM=="usb", ATTR{idVendor}=="04e8", MODE="0666"

#Sharp
SUBSYSTEM=="usb", ATTR{idVendor}=="04dd", MODE="0666"

#Sony Ericsson
SUBSYSTEM=="usb", ATTR{idVendor}=="0fce", MODE="0666"

#Toshiba
SUBSYSTEM=="usb", ATTR{idVendor}=="0930", MODE="0666"

#ZTE
SUBSYSTEM=="usb", ATTR{idVendor}=="19D2", MODE="0666"

4) Save the file and close it and then issue this command:

$ sudo chmod a+r /etc/udev/rules.d/51-android.rules

4a) [OPTIONAL] Setting up ccache

You can optionally tell the build to use the ccache compilation tool. Ccache acts as a compiler cache that can be used to speed-up rebuilds. This works very well if you do "make clean" often, or if you frequently switch between different build products.

Put the following in your .bashrc or equivalent.

export USE_CCACHE=1

By default the cache will be stored in ~/.ccache. If your home directory is on NFS or some other non-local filesystem, you will want to specify the directory in your .bashrc as well.

export CCACHE_DIR=<path-to-your-cache-directory>

The suggested cache size is 50-100GB. You will need to run the following command once you have downloaded the source code:

prebuilts/misc/linux-x86/ccache/ccache -M 50G

This setting is stored in the CCACHE_DIR and is persistent.

5) Install the repo:

$ mkdir ~/bin
$ PATH=~/bin:$PATH
$ curl http://commondatastorage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
$ chmod a+x ~/bin/repo

6) Initialize the repo:

$ mkdir WORKING_DIRECTORY
$ cd WORKING_DIRECTORY

6a) For AOSP:

$ repo init -u https://android.googlesource.com/platform/manifest -b android-4.4.4_r2

6.1) For people who have already done a repo init:

$ cd WORKING_DIRECTORY

AOSP:

$ repo init -b android-4.4.4_r2
$ repo sync

7) When prompted, enter your real name and email address.

8) Gather the files:

$ repo sync

How to add Nexus device config.

1) Navigate to the location you are going clone the device tree to:

$ cd WORKING_DIRECTORY/device
$ mkdir samsung
$ cd samsung

2) Clone the github device tree from remote to local(I'll add all 3 variants of nexus)

git clone https://android.googlesource.com/device/samsung/tuna

git clone https://android.googlesource.com/device/samsung/maguro

git clone https://android.googlesource.com/device/samsung/toro

git clone https://android.googlesource.com/device/samsung/toroplus

3) Add Vendor files(we will use shiny that are already on github,for simply setup):

Return to source root folder and do:

$ mkdir vendor
$cd vendor

now clone vendor files:

git clone https://github.com/ShinyROM/android_vendor_widevine.git -b master

git clone https://github.com/ShinyROM/android_vendor_nxp.git -b master

git clone https://github.com/ShinyROM/android_vendor_invensense -b master

git clone https://github.com/ShinyROM/android_vendor_broadcom -b master

git clone https://github.com/ShinyROM/android_vendor_csr -b master

git clone https://github.com/ShinyROM/android_vendor_ti -b master

git clone https://github.com/ShinyROM/android_vendor_samsung -b master

git clone https://github.com/ShinyROM/android_vendor_imgtec -b master

after this return to source root folder

4) Add KitKat changes to the source(more difficult part):

Tuna part:

$ cd device/samsung/tuna
$ git remote add ShinyROM https://github.com/ShinyROM/android_device_samsung_tuna
$ git fetch ShinyROM
$ git cherry-pick 4b8c328bbdf85eb9ef9ff91d387e856b0fa41598
$ git cherry-pick 3b73c36a90dc64fea97a444b3f78f9c46f51d3a1
$ git cherry-pick 20bc682ea8b7f4839fac5a9186caad66654e8744
$ git cherry-pick c3de6cd1a5d9836a26c8ec988961266e1d10eafb
$ git cherry-pick 3ab5ebccee0447c05e502876915a4f80e694774c
$ git cherry-pick 592cca8e9f9e2a6dc97aa04cdeec63b0f43f6cf8
$ git cherry-pick 0370ce5c126c4beb08ac449fdba9520709850104
$ git cherry-pick d218fe0237272173f8f525e73bc4af4eea8a22b2
$ git cherry-pick 9d1cc345633397969161f1864c8fd31bea934ed5

Now choose this for the type of your Nexus:

Maguro doesn't any change.

Toro part(will be added soon).

Toroplus part:

$ cd device/samsung/toroplus
$ git remote add ShinyROM https://github.com/ShinyROM/android_device_samsung_toroplus
$ git fetch ShinyROM
$ git cherry-pick 4bf9f8b5f3aa9a3d87cfcbeb8c12c59f4d7fbc42

Glitch fix:

return to source tree folder.

$ cd frameworks/native
$ git remote add GeyerA https://github.com/GeyerA/platform_frameworks_native
$ git fetch GeyerA
$ git cherry-pick a92548738b12f37a0ae9bf2268a15c835cabed9d
$ git cherry-pick 8c5f62fefb9c8b3e7dc8a5fbbef3e69b9afd23f9
$ git cherry-pick 2ec9852a507e977895f3794615506ca9f0e7e23b
$ git cherry-pick 117c4c56d15774ec31b4db8bbe748709090e1a16
$ git cherry-pick 32d4c4fda4032052b6a2938a89c1c7be9ecb3f75
$ git cherry-pick 55fa4ff4ce705c7a059006f5ae3acd7d8671b968
$ git cherry-pick 571387e4962f2981feb2414c16f210a6cea33810
$ git cherry-pick 5b78c099864ece8a17bee54659fa342a6be2f5a3
$ git cherry-pick 458c63bc4b5f080a4a890ef242838ccba5e557ff
$ git cherry-pick 340907456b4042de743cdd3924ce5b46ea25f5f5
$ git cherry-pick 99ee6c73d613ee859d321cda65c065aad6fb36df

Prepare for compiling:

1) Navigate back to your home directory for building:

$ cd ~/WORKING_DIRECTORY

2) Prepare To Compile:

$ source build/envsetup.sh

Or:

$ . build/envsetup.sh

3) Get your list of devices:

$ lunch

4) Now compile ('#' being the number of cores in your processor +1):

$ make -j#

Or for a flashable zip:

$ make -j# otapackage

Now you will found the zip in out folder.

Credits to:

baldwindguy77

dastin1015

GeyerA

XDA for learning me this.