1. Android build
  - Download original android source code ( android-11.0.0_r35 ) from http://source.android.com
  ( 
    $repo init -u https://android.googlesource.com/platform/manifest -b android-11.0.0_r35
    $repo sync -cdq -j12 --no-tags
    $repo start android-11.0.0_r35 --all
  )
	   
  - Then, merge the source into the android source code
  - Run following scripts to build android
    a) source build/envsetup.sh
    b) lunch 1
    c) make -j4
	
  - When you compile the android source code, you have to add google original prebuilt source(toolchain) into the android directory.
  - After build, you can find output at out/target/product/generic

2. Kernel Build  
  - Uncompress using following command at the android directory

    a) tar -xvzf *_Kernel_R.tar.gz

  - When you compile the kernel source code, you have to add google original "prebuilt" source(toolchain) into the android directory.
  - Run following scripts to build kernel
  
   
   1. cd kernel/msm-4.19
   2. mkdir -p out
   3. echo CONFIG_BUILD_ARM64_DT_OVERLAY=y >> arch/arm64/configs/vendor/winglm-perf_defconfig
   4. make ARCH=arm64 O=./out REAL_CC=../../../prebuilts/clang/host/linux-x86/clang-r353983c/bin/clang CLANG_TRIPLE=aarch64-linux-gnu- CROSS_COMPILE=../../../prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android- DTC_EXT=../../../prebuilts/misc/linux-x86/dtc/dtc vendor/winglm-perf_defconfig
   5. make ARCH=arm64 O=./out REAL_CC=../../../prebuilts/clang/host/linux-x86/clang-r353983c/bin/clang CLANG_TRIPLE=aarch64-linux-gnu- CROSS_COMPILE=../../../prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android- DTC_EXT=../../../prebuilts/misc/linux-x86/dtc/dtc -j4


	* "-j4" : The number, 4, is the number of multiple jobs to be invoked simultaneously. 
  - After build, you can find the build image(zImage) at out/arch/arm64/boot

3. to obtain the open data about KnowMeABBA*.apk App  

If you want to obtain the open data ( source ) for "KnowMeABBA or *ABBA.apk " application, 
 the open data may be obtained at http://opensource.lge.com. 
 LGE will also provide open data ( code ) to you . 
 
 You can search the keyword with "KnowMeABBA" at the search window in http://opensource.lge.com.  

You can find it in "Software List" at that website.

