Error compiling cpp helloworld example

[dsazonoff]

What version of gRPC and what language are you using?

Latest master, or v1.16.1 or bae61a0

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

Windows

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

Visual Studio 2017

What did you do?

cd /grpc/examples/cpp/helloworld/cmake_externalproject/
md .build
cd .build
cmake .. -G "Visual Studio 15 2017 Win64"

Now I'm trying to compile HelloWorld-SuperBuild.sln in debug or release mode. It fails.

What did you expect to see?

Successfull build

What did you see instead?

4>CMake Error at C:/Program Files/CMake/share/cmake-3.12/Modules/FindPackageHandleStandardArgs.cmake:137 (message):
4>  Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the
4>  system variable OPENSSL_ROOT_DIR (missing: OPENSSL_CRYPTO_LIBRARY
4>  OPENSSL_INCLUDE_DIR)
4>Call Stack (most recent call first):
4>  C:/Program Files/CMake/share/cmake-3.12/Modules/FindPackageHandleStandardArgs.cmake:378 (_FPHSA_FAILURE_MESSAGE)
4>  C:/Program Files/CMake/share/cmake-3.12/Modules/FindOpenSSL.cmake:412 (find_package_handle_standard_args)
4>  cmake/ssl.cmake:45 (find_package)
4>  CMakeLists.txt:141 (include)

Anything else we should know about your project / environment?

Is it necessary to use OpenSSL to build gRPC? Or is it possible to use boringssl and somehow keep gRPC_INSTALL=TRUE?

In case of using boringssl there is a next error:

6>CMake Error at cmake_externalproject/.build/grpc/lib/cmake/grpc/gRPCConfig.cmake:14 (include):
6>-- Using gRPC 1.18.0-dev
6>  include could not find load file:
X:/grpc/examples/cpp/helloworld/cmake_externalproject/.build/grpc/lib/cmake/grpc/gRPCTargets.cmake
6>Call Stack (most recent call first):
6>  CMakeLists.txt:73 (find_package)

This issue looks similar with #10759 #16741 #11378

[dsazonoff]

Everything is OK, when building with OpenSSL instead of boringssl.
Could someone fix helloworld/cmake_externalproject to be compilable with boringssl?