Generate protocol buffer files using Android.bp

[Chetean B]

I am trying to generate the protocol buffer's source files using the Android.bp. All the proto files are located in the folder "proto" and some of the proto files import others. I wrote the Android.bp file in the parent folder and running "mm" gives the following error: 

'out/soong/.intermediates/vendor/vendor_name/system/vendor_prj_name/ vendor_proto_gen/android_arm64_armv8-a_vendor_static/gen/proto/proto/app.pb.h', needed by 'out/target/product/prj/obj/STATIC_LIBRARIES/ vendor_proto_gen_intermediates/export_includes', missing and no known rule to make it

I am calling the library in Android.mk file and tried shared/static library combinations but the error still persists. How should the error be addressed? 

The Android.bp file is as follows: 

 cc_library {

    name: "vendor_proto_gen",

    vendor: true,

    host_supported: true,

    proto: {

        export_proto_headers: true,

        type: "full",

        canonical_path_from_root: false,

        include_dirs: [

            "proto",

        ],

    },

    shared_libs: [

        "libprotobuf-cpp-full",

    ],

    export_include_dirs: ["proto"],

    srcs: [

        "proto/**/*.proto",

    ],

}

Thank you