Build “user” not working

[alemig97]

Hi Konsta,

After running the command ‘lunch aosp_rpi4_car-user’, I created a new image, but it doesn’t work on the Raspberry Pi. Is a build supported for Raspberry Pi 4?

[KonstaT]

Please follow the instructions on how to build. https://github.com/raspberry-vanilla/android_local_manifest/tree/android-14.0

No, userbuild variant is not supported as it disables various things that are needed for development purposes. IIRC this also requires enforcing SELinux policies. https://source.android.com/docs/setup/create/new-device#build-variants

[alemig97]

Thank you for the quick response. Regarding aosp_rpi4_car, only userdebug is available, correct? Is it possible to modify the build in any way?

[KonstaT]

Well, yes, you have the source code so you can modify the build in any way you like.

[alemig97]

Thank you for the response, but what are the builds supported by Android? userdebug and eng? Based on what you were saying, "user" build no, right?

[KonstaT]

AOSP has user, userdebug, and eng build variants as documented in the previous link.

Raspberry Pi is not a device that Google supports in AOSP. That would be the purpose of Raspberry Vanilla project. As mentioned in this project's documentation (also previously linked), you would use userdebug build variant.

[alemig97]

I am interested in creating the project with a user build configuration. Could you please provide guidance on where I can modify the build configuration (can we discuss which files need to be modified for the configuration for rpi4)? Your help on this matter would be greatly.

[KonstaT]

I am interested in creating the project with a user build configuration.

Why?

Could you please provide guidance on where I can modify the build configuration (can we discuss which files need to be modified for the configuration for rpi4)?

As mentioned earlier, main reason user build variant won't boot is because it doesn't allow permissive SELinux (https://cs.android.com/android/platform/superproject/+/master:system/core/init/Android.bp;l=136-137). You would need to fix the SELinux policies (https://github.com/raspberry-vanilla/android_device_brcm_rpi4/tree/android-14.0/sepolicy) and enforce SELinux (https://github.com/raspberry-vanilla/android_device_brcm_rpi4/blob/android-14.0/BoardConfig.mk#L70). You would use the userdebug build variant for the SELinux audit logs of course.

Further reading. https://source.android.com/docs/security/features/selinux https://source.android.com/docs/security/features/selinux/implement

[alemig97]

Why?

I want to have a more performance-optimized version for rpi4 (userdebug contains extra logging).

[KonstaT]

In practice it doesn't affect performance in any way and no, userdebug doesn't contain extra logging (just ADB and serial console are enabled by default).