立你斯學習記錄

Android 模組編譯

在src目錄執行：

cd ~/android/src
. build/envsetup.sh

envsetup.sh 提供了一些的bash函數定義，當執行了envsetup.sh后就可以使用help 指令來檢視：

help

得到這些指令的輔助說明資訊：

Invoke ". build/envsetup.sh" from your shell to add the following functions to your environment:
- croot:   Changes directory to the top of the tree.
- m:       Makes from the top of the tree.
- mm:      Builds all of the modules in the current directory.
- mmm:     Builds all of the modules in the supplied directories.
- cgrep:   Greps on all local C/C++ files.
- jgrep:   Greps on all local Java files.
- resgrep: Greps on all local res/*.xml files.

Look at the source to view more functions. The complete list is:
add_lunch_combo cgrep check_product check_variant choosecombo chooseproduct choosetype choosevariant croot findmakefile gd
bclient get_abs_build_var getbugreports get_build_var getprebuilt gettop help isviewserverstarted jgrep lunch m mm mmm pid
 printconfig print_lunch_menu resgrep runhat runtest setpaths set_sequence_number set_stuff_for_environment settitle smoke
test startviewserver stopviewserver tapas tracedmdump

其中對模組的編譯有輔助說明的是tapas、m、mm、mmm這幾個指令。

獨立模組的建構指令

• 
  

  m: Makes from the top of the tree.

  
  
• 
  

  mm: Builds all of the modules in the current directory.

  
  
• 
  

  mmm: Builds all of the modules in the supplied directories.

  
  

其中mmm后面要跟模組的根目錄，不是所有的目錄下都有子模組，那些含有Android.mk檔案目錄才是模組的根目錄，模組名可以從Android.mk的LOCAL_MODULE或者LOCAL_PACKAGE_NAME變數中得到。

單獨編譯某模組，需要在mmm后面指定模組路徑，例如編譯external 中的jpeg

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# 
或者可用 mm 再欲編譯的模組目錄下執行
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# 
或者可用 m 編譯全部的模組
root@ubuntu:/home/android/src# m

你也可以在src目錄下直接執行make module name：

打開看 ./external/jpeg/Android.mk

看到裡面模組名稱為 libjpeg

LOCAL_MODULE:= libjpeg

這樣你就可以直接打模組名稱編譯

cd ~/android/src
make libjpeg