GRPC version for RHEL 6.8 with Protobuf 3.5.1

[debdatta.bh...@gmail.com]

Hello All, 

We am presently playing around with gRPC and Protobuf, and require some guidance here. We have an existing system that is compatible with RHEL 6.8 and written in C/C++. Now, we are planning to introduce a new module that behaves as a gRPC client and also uses Protobuf as communication protocol between client and server. The current version of protobuf that we could use without changing any RHSCL or RHDTS in RHEL 6.8 is 3.5.1. However, we are not sure about the gRPC version that is compatible with protobuf 3.5.1 or shipped with protobuf 3.5.1 which can be built and installed on top of RHEL 6.8. 

Can you please guide us further? Do we have a compatibility table that provides the detailed compatibility of gRPC with protobuf and supported OS versions? The release notes do not seem to provide enough information...

Regards,

Debdatta Bhattacharjee 

[Nicolas Noble]

For the C++ API, the version of protobuf needed is basically at least 3.0. There's no strong requirement in terms of which version of protobuf you're supposed to use here - as long as it's at least 3.0 that is. However, your version of RHEL means you have a very old compiler, which very likely won't compile our C++ layer.

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[debdatta.bh...@gmail.com]

Hello Nicolas! Thanks a lot for your input! Well, yes agreed that the compiler is also pretty old but do you think upgrading the compiler to some later version like gcc 4.9 by upgrading RedHat software collection pack or developer toolset will help here? Also I believe we need a later version of GLIB as well. Unfortunately we don't have any plan to upgrade to the later version of RHEL at the moment, so any suggestion here is highly appreciated!