I tried to install grpc by executing the following
git clone -b $(curl -L http://grpc.io/release) https://github.com/grpc/grpc
cd grpc
git submodule update --init
make
But when I run make, I get the message "#error This file was generated by an older version of protoc which is"
But, I have the latest protoc installed ...
/usr/bin/protoc --version
libprotoc 3.2.0