# Download Android source with patches(local_manifests)
 Refer to http://source.android.com/source/downloading.html
 $ repo init -u https://android.googlesource.com/platform/manifest -b android-o-preview-4
 $ git clone https://github.com/peyo-hd/local_manifests/tree/opv .repo/local_manifests
 $ repo sync

# Apply patch
  https://github.com/peyo-hd/local_manifests/wiki/Patch-android-o-preview-4

# Build for Raspberry Pi3
 https://github.com/peyo-hd/device_brcm_rpi3/tree/opv

Use -j[n] option on sync & build steps, if build host has a good number of CPU cores.

Graphics HAL of this build : https://github.com/anholt/mesa/wiki/VC4