android build system

android’s build system is complex but very well designed, it is very convenient once you know where to start, here is some tips:

1. the first step, enter to android root directory, and run
   . build/envsetup.sh
   then run
   help
   to get some summary information
2. run
   lunch 1
   to set build environment
   the default item 1 is generic-eng, you can add customized item via add_lunch_combo, eg.
   add_lunch_combo mojo-eng
   to add item for mojo product with variant as engineer, and run
   lunch
   to choose the lunch items
3. run
   make
   to build the system
4. if you do not want to build the whole system, given the make a target name, such as, systemimage-nodeps, userdataimage-nodeps, etc. all the target name is defined in build/core/Makefile. you can also use mm or mmm function to achieve this, example, run
   mmm packages/apps/Launcher
   to build Launcher application, enter packages/apps/Launcher and run
   mm
   do the same thing.
5. some useful function, croot, godir, cd $OUT, cgrep, gettop,
   get_build_var
6. run emulator
   emulator&
   run ddms
   ddms&
7. see detail in build/core/build-system.html

Advertisement

Tags: Android, build