[Android] dastin1015:
To compile Gingerbread on Ubuntu I'm going to first give you steps to set up your computer to get this thing rolling. This will NOT make a fully functional ROM, but give you a place to start.

Note: The source is approximately 2.6GB in size. You will need 10GB free to complete the build.

These instructions are compiled by me from different sources such as source.android.com and Cyanogen Wiki.

1) You need the following:

Python 2.4 -- 2.7, which you can download from python.org.

Or:

$ sudo add-apt-repository ppa:fkrull/deadsnakes
$ sudo apt-get update
$ sudo apt-get install python2.5

JDK 6 if you wish to build Gingerbread or newer; JDK 5 for Froyo or older. You can download both from java.sun.com.

Or:

$ sudo add-apt-repository "deb http://archive.canonical.com/ lucid partner"
$ sudo add-apt-repository "deb-src http://archive.canonical.com/ubuntu lucid partner"
$ sudo apt-get update
$ sudo apt-get install sun-java6-jdk

Git 1.5.4 or newer. You can find it at git-scm.com.

Or:

$ sudo apt-get update
$ sudo apt-get upgrade
$ sudo apt-get install git-core

Valgrind, a tool that will help you find memory leaks, stack corruption, array bounds overflows, etc. Download from valgrind.org.

Or:

$ sudo apt-get update
$ sudo apt-get upgrade
$ sudo apt-get install valgrind

2) Install required packages.

$ sudo apt-get install git-core gnupg flex bison gperf build-essential \
zip curl zlib1g-dev libc6-dev lib64ncurses5-dev \
x11proto-core-dev libx11-dev lib64readline5-dev lib64z-dev \
libgl1-mesa-dev g++-multilib tofrodos

3) Configure your USB.

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

Inside of this blank text file insert:

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

#ZTE
SUBSYSTEM==usb, SYSFS{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

5) Download the repo:

$ mkdir ~/bin
$ PATH=~/bin:$PATH
$ curl https://dl-ssl.google.com/dl/googlesource/git-repo/repo > ~/bin/repo
$ chmod a+x ~/bin/repo

6) Initialize the repo:

$ mkdir WORKING_DIRECTORY
$ cd WORKING_DIRECTORY
$ repo init -u https://android.googlesource.com/platform/manifest -b android-2.3.7_r1

7) When prompted, please configure Repo with your real name and email address. To use the Gerrit code-review tool, you will need an email address that is connected with a registered Google account. Make sure this is a live address at which you can receive messages. The name that you provide here will show up in attributions for your code submissions.

8) Gather the files:

$ repo sync

9) Verify and insert public key block:

$ gpg --import

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.2.2 (GNU/Linux)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=Wi5D
-----END PGP PUBLIC KEY BLOCK-----

10) After copying and pasting the public key block press Crtl+D to end the input.

11) Compiling:

$ source build/envsetup.sh

Or:

$ . build/envsetup.sh

12) Issue:

$ lunch

13) Pick your poison.

14) Now issue:

$ make

15) Now just cross your fingers and hope it all works out!

16) Issue this command to create a flashable zip:

$ make otapackage

Or if you want to test on an emulator:

$ emulator

17) If all went well you can either run your build on an emulator or flash it on a device.

Please note that you have already selected your build target with lunch, and it is unlikely at best to run on a different target than it was built for.

~How To Add A Device To The List~

1) Find the github for your device you wish to add. (For me it is the HTC Hero CDMA)

2) Now navigate to the location you are going clone the device tree to:

$ cd WORKING_DIRECTORY/device
$ mkdir htc ; cd htc

3) Clone the github device tree from remote to local: (The heroc would be whatever you want that folder to be named so make sure it is whatever standard name would be for your device, example: Nexus One [passion], Nexus S [crespo], Motorola Droid [sholes], HTC Incredible [inc], etc.)

git clone git://github.com/CyanogenMod/android_device_htc_heroc.git -b gingerbread heroc

4) Now navigate into the folder:

$ cd heroc

5) Connect phone to computer and enter this code:

$ ./extract-files.sh

6) Prepare To Compile:

$ source build/envsetup.sh

Or:

$ . build/envsetup.sh

7) Get your list of devices:

$ lunch

8) Pick your poison.

9) Now compile:

$ make

Or if you want a flashable zip:

$ make otapackage