Android Build: Tips and Tricks

All below build steps are trivial, but i took like a week to get a grip of..  just documenting to be handy.

$MYDROID is root of your android source directory.

Quick Incremental Build

Setup the environment for your build setup, go to moudle's directory with Android.mk and build.
`source $MYDROID/build/envsetup.sh`
`cd ./hardware/ti/omap3/liboverlay`

`mm`

Note: `mm-B` will clean build all the libraries under a subdirectory.

Package build

Building .apk in android SDK. No need of eclipse or PDK.

`source $MYDROID/build/envsetup.sh`
`mmm `

(say #mmm $MYDROID/packages/gallery)

Selective Clean

` make clean-`

(eg. #make clean-libomxcommon )

Complete clean 

`make clean`  works but, "rm -rf ./out" is faster

Display full commands

`make showcommands`

Number of parallel threads

This is same as GNU make, and chose it based on number of cpu cores available.
`make -j`

Btw, complete android build guide is available athttp://pdk.android.com/online-pdk/guide/build_system.html

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From: http://www.bittoggler.com/2010/06/android-build-tips-and-tricks.html