add_custom_command(
        OUTPUT  ${PROTO_DIR}/helloworld.pb.cc
        ${PROTO_DIR}/helloworld.pb.h
        ${PROTO_DIR}/helloworld.grpc.pb.cc
        ${PROTO_DIR}/helloworld.grpc.pb.h
        COMMAND ${protobuf_BINARY_DIR}/protoc
        ARGS --grpc_out "${PROTO_DIR}"
        --cpp_out "${PROTO_DIR}"
        -I "${PROTO_DIR}"
        --plugin=protoc-gen-grpc=${grpc_BINARY_DIR}/grpc_cpp_plugin
        helloworld.proto)

message("${BoldGreen}add files at ${PROTO_DIR} successfully!${ColourReset}")

add_library(test2_grpc STATIC
        ${PROTO_DIR}/helloworld.pb.cc
        ${PROTO_DIR}/helloworld.pb.h
        ${PROTO_DIR}/helloworld.grpc.pb.cc
        ${PROTO_DIR}/helloworld.grpc.pb.h)

target_link_libraries(wenet_proto PUBLIC ${third_party_libraries})

foreach(_target
        greeter_client greeter_server
        greeter_async_client greeter_async_client2 greeter_async_server)
    add_executable(${_target} "${_target}.cc")
    target_link_libraries(${_target} test2_grpc ${third_party_libraries})
endforeach()