准备工作
在AndroidSource Code中有envsetup.sh档案，当执行过此档案后，可以大幅将build的过程简单化、自动化
此档案在src(android source code 位置)/build/中
所以可以执行以下指令
cd /src/build/
. envsetup.sh
可以使用help来检示有哪些指令可以使用
Invoke ". build/envsetup.sh" from your shell to add thefollowing functions to your environment:
- croot: Changes directory to the top of the tree.
- m: Makesfrom the top of the tree.
- mm: Builds all of the modules in the currentdirectory.
- mmm: Builds all of the modules in the supplieddirectories.
- cgrep: Greps on all local C/C++ files.
- hgrep: Greps on all local C/C++ header files.
- jgrep: Greps on all local Java files.
- mkgrep: Greps on all local make files.
- rcgrep: Greps on all local .rc files.
- resgrep: Greps on all local res/*.xml files.
- shgrep: Greps on all local .sh files.
- godir: Go to the directory containing a file.
其中对模块的编译有辅助说明的是tapas、m、mm、mmm这几个指令。
m越多，编译范围越小。
m 编译全部的模块
root@ubuntu:/home/android/src# m
mm 编译模块目录
root@ubuntu:/home/android/src/external/jpeg# mm
============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=2.1-update1
TARGET_PRODUCT=generic
TARGET_BUILD_VARIANT=eng
TARGET_SIMULATOR=false
TARGET_BUILD_TYPE=release
TARGET_ARCH=arm
HOST_ARCH=x86
HOST_OS=linux
HOST_BUILD_TYPE=release
BUILD_ID=ECLAIR
============================================
make: Entering directory `/home/android/src'
Copy: out/target/product/generic/system/etc/apns-conf.xml
make: Leaving directory `/home/android/src'
root@ubuntu:/home/android/src/external/jpeg#
单独编译某模块，需要在mmm后面指定模块路径
root@ubuntu:/home/android/src# mmm external/jpeg/
============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=2.1-update1
TARGET_PRODUCT=generic
TARGET_BUILD_VARIANT=eng
TARGET_SIMULATOR=
TARGET_BUILD_TYPE=release
TARGET_ARCH=arm
HOST_ARCH=x86
HOST_OS=linux
HOST_BUILD_TYPE=release
BUILD_ID=ECLAIR
============================================
make: Entering directory `/home/android/src'
Target buildinfo: out/target/product/generic/root/default.prop
Target buildinfo: out/target/product/generic/system/build.prop
Copy: out/target/product/generic/system/etc/apns-conf.xml
make: Leaving directory `/home/android/src'
root@ubuntu:/home/android/src#