make source with branch android-9.0 fail

[Vancezheng]

I hava download android source with branch anbox-p

repo init -u https://github.com/anbox/platform_manifests.git -b anbox-p
repo sync -j4

and the default xml .repo/manifests/default.xml is
<default revision="refs/tags/android-9.0.0_r3"
After I have lunch anbox_arm64-userdebug，but show errors:

[root@myq anbox-android9]# lunch anbox_arm64-userdebug
build/make/core/envsetup.mk:254: error: Multiple board config files for TARGET_DEVICE arm64: device/anbox/arm64/BoardConfig.mk device/generic/arm64/BoardConfig.mk.
10:54:57 dumpvars failed with: exit status 1

How can I fix it？

[Redecorating]

If you add <remove-project name="device/generic/arm64" /> to .repo/manifests/anbox.xml, it fixes that error for me.

Here's the workarounds I've had to use after that, which might help if you have the same problems:

I uncommented LOCAL_SDK_VERSION := current in anbox/android/appmgr/Android.mk as it complains about that being missing.

There were errors about camera.goldfish.jpeg missing, I replaced the camera fingerprint data gps lights power qemu-props sensors vibrator folders in anbox/android with ones from here https://android.googlesource.com/device/generic/goldfish/+/refs/tags/android-9.0.0_r3 , and commented out include $(TMP_PATH)/android/qemud/Android.mk in anbox/Android.mk.

Some scripts need python2, sudo ln -s /bin/python2 /usr/local/bin/python puts it at the start of my $PATH, but that'll break things that need python3 so remove it when you are done.

I've gotten it to errors about opengl. I commented out findExtInList in anbox/android/opengl/system/egl/eglDisplay.cpp (a bad fix to an unused function error). But now I've reached fatal error: 'system/window.h' file not found, and I haven't found a solution to that.

I also tried replacing the opengl folder with https://android.googlesource.com/device/generic/goldfish-opengl/+/refs/tags/android-9.0.0_r3 but I haven't gotten that to work either.