ADD_EXECUTABLE (${PROJECT_NAME}
  driver.pb.cc  # when commented, there is no linking error
  driver.cc
)

TARGET_LINK_LIBRARIES(${PROJECT_NAME}
    adapter.a
    grpc++_unsecure
    protobuf
)

int main(int argc, const char* argv[]) {
  return 0;
}

// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: driver.proto
// and so forth .................................