完全是一个全新的系统，如何编译android4.0？其实很简单。
1. 访问地址http://source.android.com/source/initializing.html
2. 按照指示安装一些工具：
$ sudo apt-get install libx11-dev:i386
JDK：
$ sudo add-apt-repository "deb http://archive.canonical.com/ lucid partner"
$ sudo apt-get update
$ sudo apt-get install sun-java6-jdk
Python：
$ sudo apt-get install python
Git
$ sudo apt-get install git
Curl
$ sudo apt-get install curl
g++
$ sudo apt-get install g++
zlib
$ sudo apt-get install zlib1g-dev
$ sudo apt-get install lib64z1-dev
bison
$ sudo apt-get install bison
flex
$ sudo apt-get install flex
ncurses
$ sudo apt-get install libncurses5-dev
GL
$ sudo apt-get install libgl1-mesa-dev
gpref
$ sudo apt-get install gpref
3. http://source.android.com/source/downloading.html
$ mkdir ~/bin
$ PATH=~/bin:$PATH
$ curl https://dl-ssl.google.com/dl/googlesource/git-repo/repo > ~/bin/repo
$ chmod a+x ~/bin/repo
$ mkdir WORKING_DIRECTORY
$ cd WORKING_DIRECTORY
$ repo init -u https://android.googlesource.com/platform/manifest -b android-4.0.1_r1
$ repo sync
4. build/core/config.mk
去掉Werror这行（目的是不要把warnings当成errors）
5.
修改 gedit frameworks/base/libs/utils/Android.mk
将：
LOCAL_CFLAGS += -DLIBUTILS_NATIVE=1 $(TOOL_CFLAGS)
改为：
LOCAL_CFLAGS += -DLIBUTILS_NATIVE=1 $(TOOL_CFLAGS) -fpermissive
6.
修改文件
external/oprofile/libpp/Android.mk
external/oprofile/pp/Android.mk
将
LOCAL_CFLAGS := $(common_host_cflags)
改为
LOCAL_CFLAGS := $(common_host_cflags) -fpermissive
7.
修改make文件
frameworks/base/tools/aapt/Android.mk
frameworks/base/tools/localize/Android.mk
将这几句
ifeq ($(HOST_OS),linux)
LOCAL_LDLIBS += -lrt
endif
改为
ifeq ($(HOST_OS),linux)
LOCAL_LDLIBS += -lrt -lpthread
endif
8.
修改源码目录下/build/core/combo/HOST_linux-x86.mk文件：
将以下语句
HOST_GLOBAL_CFLAGS += -D_FORTIFY_SOURCE=0
修改为
HOST_GLOBAL_CFLAGS += -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0
9.
$vi external/gtest/src/../include/gtest/internal/gtest-param-util.h
+ #include <cstddef>
10. http://source.android.com/source/building.html
$ source build/envsetup.sh
$ lunch full-eng
$ make -j4