GRPC version to use for Googleapi build

[Uma Shunmugan]

I was trying to do a C++ build of googleapis (latest source from https://github.com/googleapis/googleapis.git) on Linux, using the latest grpc version 1.28.1 (and protobuf 3.11.2) , but the build produced some errors that indicated that the grpc version might not be compatible with the googleapis version. 

My questions are:

1. What is the latest stable version of googleapis that I should be using? BTW, how do I check/confirm which version of the source I have checked out?

2. Where could I find the changelog(s) for the googleapis? 

3. How do I find the correct GRPC version to use with a particular version of googleapis?

4. Is there a minimum g++ version required (I was using 4.8.2)?

Thanks in advance!

[stanle...@google.com]

I can answer 4. for now that the minimum gc version required is 4.9 https://grpc.io/about/#officially-supported-languages-and-platforms