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# Copyright 2018 gRPC authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# cmake build file for C++ helloworld example.
# Assumes protobuf and gRPC have been installed using cmake.
# See cmake_externalproject/CMakeLists.txt for all-in-one cmake build
# that automatically builds all the dependencies before building helloworld.
cmake_minimum_required(VERSION 2.8)
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()
if(GRPC_AS_SUBMODULE)
# One way to build a projects that uses gRPC is to just include the
# entire gRPC project tree via "add_subdirectory".
# This approach is very simple to use, but the are some potential
# disadvantages:
# * it includes gRPC's CMakeLists.txt directly into your build script
# without and that can make gRPC's internal setting interfere with your
# own build.
# * depending on what's installed on your system, the contents of submodules
# in gRPC's third_party/* might need to be available (and there might be
# additional prerequisites required to build them). Consider using
# the gRPC_*_PROVIDER options to fine-tune the expected behavior.
#
# A more robust approach to add dependency on gRPC is using
# cmake's ExternalProject_Add (see cmake_externalproject/CMakeLists.txt).
# Include the gRPC's cmake build (normally grpc source code would live
# in a git submodule called "third_party/grpc", but this example lives in
# the same repository as gRPC sources, so we just look a few directories up)
add_subdirectory(../../.. ${CMAKE_CURRENT_BINARY_DIR}/grpc EXCLUDE_FROM_ALL)
message(STATUS "Using gRPC via add_subdirectory.")
# After using add_subdirectory, we can now use the grpc targets directly from
# this build.
set(_PROTOBUF_LIBPROTOBUF libprotobuf)
set(_PROTOBUF_PROTOC $<TARGET_FILE:protoc>)
set(_GRPC_GRPCPP_UNSECURE grpc++_unsecure)
set(_GRPC_CPP_PLUGIN_EXECUTABLE $<TARGET_FILE:grpc_cpp_plugin>)
else()
# This branch assumes that gRPC and all its dependencies are already installed
# on this system, so they can be located by find_package().
# Find Protobuf installation
# Looks for protobuf-config.cmake file installed by Protobuf's cmake installation.
set(protobuf_MODULE_COMPATIBLE TRUE)
find_package(Protobuf CONFIG REQUIRED)
message(STATUS "Using protobuf ${protobuf_VERSION}")
set(_PROTOBUF_LIBPROTOBUF protobuf::libprotobuf)
set(_PROTOBUF_PROTOC $<TARGET_FILE:protobuf::protoc>)
# Find gRPC installation
# Looks for gRPCConfig.cmake file installed by gRPC's cmake installation.
find_package(gRPC CONFIG REQUIRED)
message(STATUS "Using gRPC ${gRPC_VERSION}")
set(_GRPC_GRPCPP_UNSECURE gRPC::grpc++_unsecure)
set(_GRPC_CPP_PLUGIN_EXECUTABLE $<TARGET_FILE:gRPC::grpc_cpp_plugin>)
endif()
# Proto file
get_filename_component(hw_proto "../../protos/helloworld.proto" ABSOLUTE)
get_filename_component(hw_proto_path "${hw_proto}" PATH)
# Generated sources
set(hw_proto_srcs "${CMAKE_CURRENT_BINARY_DIR}/helloworld.pb.cc")
set(hw_proto_hdrs "${CMAKE_CURRENT_BINARY_DIR}/helloworld.pb.h")
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 "${hw_proto_srcs}" "${hw_proto_hdrs}" "${hw_grpc_srcs}" "${hw_grpc_hdrs}"
COMMAND ${_PROTOBUF_PROTOC}
ARGS --grpc_out "${CMAKE_CURRENT_BINARY_DIR}"
--cpp_out "${CMAKE_CURRENT_BINARY_DIR}"
-I "${hw_proto_path}"
--plugin=protoc-gen-grpc="${_GRPC_CPP_PLUGIN_EXECUTABLE}"
"${hw_proto}"
DEPENDS "${hw_proto}")
# Include generated *.pb.h files
include_directories("${CMAKE_CURRENT_BINARY_DIR}")
# Targets greeter_[async_](client|server)
foreach(_target
greeter_client greeter_server
greeter_async_client greeter_async_server)
add_executable(${_target} "${_target}.cc"
${hw_proto_srcs}
${hw_grpc_srcs})
target_link_libraries(${_target}
${_GRPC_GRPCPP_UNSECURE}
${_PROTOBUF_LIBPROTOBUF})
endforeach()
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