1. Build

a> Set up following environment variables before invoking cosa_build.
    You can set up the environment variables using the following command:
			For PC build,  #source cosa_setenv_pc.sh
			For CNS build,  #source cosa_setenv_cns.sh
			For TPG build,  #source cosa_setenv_tpg.sh
			For E4200 build,  #source cosa_setenv_e4200.sh
			
	If those are not set, default values will be taken.
        COSA_TOOLCHAINS_DIR_TPG     -- default value is /opt/cisco/CCSP/mips-linux-toolchain-1.2.0/bin
        COSA_TOOLCHAINS_DIR_CNS     -- default value is /opt/cnstools/arm-2009q1/bin
        OEBASE

	For hybrid_android envrionment setup, need more actions:
    1) make sure you had the cisco-android-sdk-7425-g8 or cisco-android-sdk-7425-ref7425 code ;
    2) make sure you had the stbgcc-4.5.3-0.6  toolchain;
    3) check the following variable in cosa_seten_hybrid_android.sh for your envrionment :
		CISCO_ANDROID_SDK_PATH
		COSA_HYBRID_ANDROID_CROSS_TOOLCHAIN_PATH
		TR135_INSTALL_PATH
		CROSS_COMPILE
		CROSS_GCC_4_5_3
		BUILD_WITH_STATIC_LIB   
		OEBASE
    4) check out tr135 source code and enter COSA2.0 directory;
    5) source ./cosa_setenv_hybrid_android.sh to setup envrionment
    7) build command: ./cosa_build hybrid_android clean   ;   ./cosa_build hybrid_android resetup [build option]
    8) build options (optional): 
    	dbg: 	-D_DEBUG -g		(e.g. ./cosa_build hybrid_android resetup dbg)
    	prod:   -DNDEBUG -O2 	(e.g. ./cosa_build hybrid_android resetup prod)
    	If not specify build options, the build flag is: -D_DEBUG -O2 (e.g. ./cosa_build hybrid_android resetup)

b> Invoke the build

	You can use right option to build.
	
    For PC build,  #./cosa_build pc   resetup clean
    For CNS build, #./cosa_build cns  resetup clean
    For TPG build, #./cosa_build tpg  resetup clean
    For Hybrid build, #./cosa_build hybrid_android resetup clean
    For e4200 build, #./cosa_build e4200 resetup clean

2. Usage
	the building output will be cosa/build/pc/bbhm/cosa, or cosa/build/cns/bbhm/cosa, or cosa/build/tpg/bbhm/cosa cosa/build/hybrid_android/bbhm/cc, or cosa/build/e4200/bbhm/cc according to the building params.
	
	Normally, can run the whole cosa system like this:
	1) Copy whole cc directory to right directory. 
	2) Enter cc, run #./cosa_start.sh &
	3) Normally, the cosa will be up. You can run the following command to test:
	  * Enter cc, run #export LD_LIBRARY_PATH=$PWD:.:$PWD/lib:/usr/lib:$LD_LIBRARY_PATH
	  * Run #./ccsp_bus_client_tool simu getv Device.     //"Device." will be replaced by "InternetGatewayDevice." in final release. Currently, we use Device.