Thanks Nicolas, I will read the doc you pointed and make the fork in the coming days (weeks maybe :p).
One last question that come to my mind. Like I said in the above mentioned thread, the person who develop the patch is gone and I'm taking responsability for the code.
I can make it compile on Linux, test it for our use cases (Android device in accessory mode) but I don't know if the patches will be correct towards coding rules or grpc philosophy.
And, if I understood correctly, doing the fork means that no peer review will be done to comment and accept the patches but I'm willing to have advices about how to do better integration inside gRPC world.
Si here is my question (finally) : do you think it is possible to have review from gRPC devs people?