Enthusiasm

1. Build environment
   
   Install Ubuntu 9.10(Daum ftp)
   

2. Set Root user password
   
   

   $ sudo passwd
   
   

    

3. Download and Install essential packages
   
   

   $ sudo apt-get install flex bison gperf libsdl-dev libesd0-dev libwxgtk2.6-dev build-essential zip curl
   

   $ sudo apt-get install valgrind
   

   Android requires the following system packages:
   1. flex : This lexical analyzer generator is used to read a given input file for a descrpition of a scanner to generate.
   2. bison : This is a general-purpose parser generator.
   3. gperf : This is a perfect has function generator.
   4. libesd0-dev : This enlightened sound daemon (dev files) is used to mix digitized audio streams for playback by a single device.
   5. libwxgtk2.6-dev : This package provides GUI components and other facilities for many differnet playforms.
   6. build-essential : This package contains a list of packages considered fundamental to building to Debian Packages.
   7. Android source code includes a hard dependency on the JAVA Developer Kit(JDK) 5.0 Update 12 or greater.
   

4. Get Android Source
   
   These days, if you download android source, maybe Android source is downloaded except kernel source.
   So you must check about this and modifiy manifest.
   
   

   $ repo init u git://android.git.kernel.org/kernel/common.git
   $ vi .repo/manifest.xml
   

   
   Add line in .repo/manifest.xml
   

   <project path="kernel" name="kernel/common" revision="refs/heads/android-2.6.27" />
   

    

   $ sudo sync
   

    

5. Build Android
   
   

   $ make
   

   
   You can also build only kernel
   
   

   $ cd kernel
   $ make msm_defconfig ARCH=arm
   $ make ARCH=arm CROSS_COMPILE=../prebuilt/linux-x86/toochain/arm-eabi-4.2.1/bin/arm-eabi-
   
   $ make foldfish_defconfig ARCH=arm
   $ make ARCH=arm CROSS_COMPILE=../prebuilt/linux-x86/toochain/arm-eabi-4.2.1/bin/arm-eabi-
   

reference : http://dev.odriod.com , http://google.com