From 06251f8cd6a36f8406bf91874af2211de7e81441 Mon Sep 17 00:00:00 2001
From: Jan Tattermusch <jtattermusch@google.com>
Date: Thu, 9 Nov 2017 11:09:29 +0100
Subject: [PATCH] make helloworld CMakeLists compile on windows

---
 examples/cpp/helloworld/CMakeLists.txt      | 23 +++++++++++++++++----
 test/distrib/cpp/run_distrib_test_cmake.bat | 10 +++++++++
 2 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/examples/cpp/helloworld/CMakeLists.txt b/examples/cpp/helloworld/CMakeLists.txt
index 71a8db4f24f..a1869d21bbb 100644
--- a/examples/cpp/helloworld/CMakeLists.txt
+++ b/examples/cpp/helloworld/CMakeLists.txt
@@ -6,13 +6,28 @@ project(HelloWorld C CXX)
 
 if(NOT MSVC)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+else()
+  add_definitions(-D_WIN32_WINNT=0x600)
 endif()
 
 # Protobuf
-set(protobuf_MODULE_COMPATIBLE TRUE)
-find_package(protobuf CONFIG REQUIRED)
+# NOTE: we cannot use "CONFIG" mode here because protobuf-config.cmake
+# is broken when used with CMAKE_INSTALL_PREFIX
+find_package(protobuf REQUIRED)
 message(STATUS "Using protobuf ${protobuf_VERSION}")
 
+if(Protobuf_FOUND)
+  # Protobuf_FOUND is set for package type "CONFIG"
+  set(_PROTOBUF_LIBPROTOBUF protobuf::libprotobuf)
+  set(_PROTOBUF_PROTOC protobuf::protoc)
+endif()
+if(PROTOBUF_FOUND)
+  # PROTOBUF_FOUND is set for package type "MODULE"
+  set(_PROTOBUF_LIBPROTOBUF ${PROTOBUF_LIBRARIES})
+  set(_PROTOBUF_PROTOC ${PROTOBUF_PROTOC_EXECUTABLE})
+  include_directories(${PROTOBUF_INCLUDE_DIRS})
+endif()
+
 # gRPC
 find_package(gRPC CONFIG REQUIRED)
 message(STATUS "Using gRPC ${gRPC_VERSION}")
@@ -31,7 +46,7 @@ set(hw_grpc_srcs "${CMAKE_CURRENT_BINARY_DIR}/helloworld.grpc.pb.cc")
 set(hw_grpc_hdrs "${CMAKE_CURRENT_BINARY_DIR}/helloworld.grpc.pb.h")
 add_custom_command(
       OUTPUT "${hw_grpc_srcs}" "${hw_grpc_hdrs}"
-      COMMAND protobuf::protoc
+      COMMAND ${_PROTOBUF_PROTOC}
       ARGS --grpc_out "${CMAKE_CURRENT_BINARY_DIR}" -I "${hw_proto_path}"
         --plugin=protoc-gen-grpc="${gRPC_CPP_PLUGIN_EXECUTABLE}"
         "${hw_proto}"
@@ -48,6 +63,6 @@ foreach(_target
     ${hw_proto_srcs}
     ${hw_grpc_srcs})
   target_link_libraries(${_target}
-    protobuf::libprotobuf
+    ${_PROTOBUF_LIBPROTOBUF}
     gRPC::grpc++_unsecure)
 endforeach()
diff --git a/test/distrib/cpp/run_distrib_test_cmake.bat b/test/distrib/cpp/run_distrib_test_cmake.bat
index 58d4a2a4c95..ac4f6b77c00 100644
--- a/test/distrib/cpp/run_distrib_test_cmake.bat
+++ b/test/distrib/cpp/run_distrib_test_cmake.bat
@@ -57,6 +57,16 @@ cmake -DCMAKE_INSTALL_PREFIX=%INSTALL_DIR% -DOPENSSL_ROOT_DIR=C:/OpenSSL-Win32 -
 cmake --build . --config Release --target install || goto :error
 cd ../..
 
+# Build helloworld example using cmake
+cd examples/cpp/helloworld
+mkdir cmake
+cd cmake
+mkdir build
+cd build
+cmake -DCMAKE_INSTALL_PREFIX=%INSTALL_DIR% ../.. || goto :error
+cmake --build . --config Release || goto :error
+cd ../../../../..
+
 goto :EOF
 
 :error