PREREQUISITES

To build gRPC & protobuf from source, the following tools are needed:

• autoconf
• automake
• libtool
• make
• g++
• unzip

Following steps needs to be followed to buld Ciena gRPC C++ Client for gRPC stack v1.0.0

1> Clone Ciena gNMI C++ client repository from github using command

git clone https://github.com/ciena/gNMI-cpp-client.git

2> Go into client repository directory "gNMI-cpp-client" and then clone gRPC stack v1.0.0 recursively to include third party submodules like boringssl, protobuf etc using the command

cd gNMI-cpp-client
git clone --recurse-submodules -b v1.0.0  https://github.com/grpc/grpc.git

3> You may require to patch a few files of gRPC stack, boringssl for making them compatible to your compiler version. For gcc 4.4.6 following files need to be patched.

• src/core/ext/transport/chttp2/server/insecure/server_chttp2.c

• src/core/lib/security/transport/handshake.c

• third_party/boringssl/crypto/chacha/chacha_vec.c

• third_party/boringssl/crypto/cipher/e_chacha20poly1305.c

• third_party/boringssl/crypto/internal.h

• third_party/boringssl/crypto/poly1305/poly1305_vec.c

• third_party/boringssl/include/openssl/sha.h

  The required changes are present in the ciena.grpc.patch file.

  To apply this patch, run the following command

patch -p0 < ciena.grpc.patch

This will modify the stack to be compatible if needed

4> Build grpc stack

cd grpc
make NO_SECURE=false EMBED_OPENSSL=true

5> Build the ciena C++ gNMI client

cd ../ciena_grpc_client/v1.0.x/cpp
make