grpc: GRPC C++ Build Fails for gcc 8.2

What version of gRPC and what language are you using?

1.15.0 and C++

What operating system (Linux, Windows, …) and version?

Linux - CentOS 7

What runtime / compiler are you using (e.g. python version or version of gcc)

gcc 8.2

What did you do?

If possible, provide a recipe for reproducing the error. Try being specific and include code snippets if helpful.

# With gcc 8.2 in environment
$ gcc --version
gcc (GCC) 8.2.0
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ git clone --recursive https://github.com/grpc/grpc
$ cd grpc && git checkout v1.15.0 -b v1.15.0
$ mkdir build && cd build
$ cmake ..
$ make -j4

What did you expect to see?

Build Successfully

What did you see instead?

/home/ksharma/Downloads/grpc/third_party/boringssl/crypto/x509/x509_test.cc: In member function ‘virtual void X509Test_ZeroLengthsWithX509PARAM_Test::TestBody()’:
/home/ksharma/Downloads/grpc/third_party/boringssl/crypto/x509/x509_test.cc:712:10: error: declaration of ‘struct X509Test_ZeroLengthsWithX509PARAM_Test::TestBody()::Test’ shadows a previous local [-Werror=shadow]
   struct Test {
          ^~~~
In file included from /home/ksharma/Downloads/grpc/third_party/boringssl/crypto/x509/x509_test.cc:19:
/home/ksharma/Downloads/grpc/third_party/boringssl/third_party/googletest/include/gtest/gtest.h:375:23: note: shadowed declaration is here
 class GTEST_API_ Test {

Make sure you include information that can help us debug (full error message, exception listing, stack trace, logs).

Anything else we should know about your project / environment?

I tried building it with gcc 7.3 and it built successfully. So, I some default warnings/error compiler flags introduced in gcc 8 fails the build.