How to build AOSP for Android Automotive OS?

Question

I have downloaded AOSP codebase for x86 from https://www.android-x86.org/. It builds fine. I wonder how I setup the config or .mk, so that I can compile or build Android with Android Automotive OS flavor.

Any pointers?

Answer 1

Refer to /device/generic/car/ repository where AOSP car emulator configuration is available.

The following target variants are available:

aosp_car_arm-userdebug
aosp_car_arm64-userdebug
aosp_car_x86-userdebug
aosp_car_x86_64-userdebug

I recommend to follow the official documentation for downloading and building AOSP: Set up for Android Development. You can choose car emulator as your build target.

In short:

1. Download some Android repository. In case of Android 10, this could be e.g. using repo:

   $ repo init -u https://android.googlesource.com/platform/manifest -b android-10.0.0_r14
   $ repo sync
   

2. Setup an environment and choose the car emulator target variant that matches your CPU architecture, e.g.

   $ . build/envsetup.sh
   $ lunch aosp_car_x86-userdebug
   

3. Build the target:

   $ make
   

4. After successful build, run the emulator from command line:

   $ emulator
   

   Note: Usually, for development purposes you would like to run the emulator with some additional options, e.g. -selinux permissive (SELinux not enforced) or -writable-system (writable system image). Refer to Start the emulator from the command line documentation for more details.