Build steps: 1. Download Android 4.2.2 source code from google 2. Modify buildGPL.sh, replace the Your_Toolchain_PATH with your tool path in android code. for example: android/prebuilts/gcc/linux-x86/arm/arm-linux-androidYour_Toolchain_PATHeabi-4.6/bin 3. Run the script under your shell ./buildGPL.sh Thanks!