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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++ route_guide 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 route_guide. | ||
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|
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| cmake_minimum_required(VERSION 3.5.1) | ||
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| if (NOT DEFINED CMAKE_CXX_STANDARD) | ||
| set (CMAKE_CXX_STANDARD 14) | ||
| endif() | ||
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| if(MSVC) | ||
| add_definitions(-D_WIN32_WINNT=0x600) | ||
| endif() | ||
|
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| find_package(Threads REQUIRED) | ||
|
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| 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(_REFLECTION grpc++_reflection) | ||
| if(CMAKE_CROSSCOMPILING) | ||
| find_program(_PROTOBUF_PROTOC protoc) | ||
| else() | ||
| set(_PROTOBUF_PROTOC $<TARGET_FILE:protobuf::protoc>) | ||
| endif() | ||
| set(_GRPC_GRPCPP grpc++) | ||
| if(CMAKE_CROSSCOMPILING) | ||
| find_program(_GRPC_CPP_PLUGIN_EXECUTABLE grpc_cpp_plugin) | ||
| else() | ||
| set(_GRPC_CPP_PLUGIN_EXECUTABLE $<TARGET_FILE:grpc_cpp_plugin>) | ||
| endif() | ||
| elseif(GRPC_FETCHCONTENT) | ||
| # Another way is to use CMake's FetchContent module to clone gRPC at | ||
| # configure time. This makes gRPC's source code available to your project, | ||
| # similar to a git submodule. | ||
| message(STATUS "Using gRPC via add_subdirectory (FetchContent).") | ||
| include(FetchContent) | ||
| FetchContent_Declare( | ||
| grpc | ||
| GIT_REPOSITORY https://github.com/grpc/grpc.git | ||
| # when using gRPC, you will actually set this to an existing tag, such as | ||
| # v1.25.0, v1.26.0 etc.. | ||
| # For the purpose of testing, we override the tag used to the commit | ||
| # that's currently under test. | ||
| GIT_TAG v1.46.2) | ||
| FetchContent_MakeAvailable(grpc) | ||
|
|
||
| # Since FetchContent uses add_subdirectory under the hood, we can use | ||
| # the grpc targets directly from this build. | ||
| set(_PROTOBUF_LIBPROTOBUF libprotobuf) | ||
| set(_REFLECTION grpc++_reflection) | ||
| set(_PROTOBUF_PROTOC $<TARGET_FILE:protoc>) | ||
| set(_GRPC_GRPCPP grpc++) | ||
| if(CMAKE_CROSSCOMPILING) | ||
| find_program(_GRPC_CPP_PLUGIN_EXECUTABLE grpc_cpp_plugin) | ||
| else() | ||
| set(_GRPC_CPP_PLUGIN_EXECUTABLE $<TARGET_FILE:grpc_cpp_plugin>) | ||
| endif() | ||
| else() | ||
| # This branch assumes that gRPC and all its dependencies are already installed | ||
| # on this system, so they can be located by find_package(). | ||
|
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||
| # Find Protobuf installation | ||
| # Looks for protobuf-config.cmake file installed by Protobuf's cmake installation. | ||
| set(protobuf_MODULE_COMPATIBLE TRUE) | ||
| find_package(Protobuf CONFIG) | ||
| if(NOT Protobuf_FOUND) | ||
| find_package(Protobuf REQUIRED) | ||
| endif() | ||
| message(STATUS "Using protobuf ${Protobuf_VERSION}") | ||
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| set(_PROTOBUF_LIBPROTOBUF protobuf::libprotobuf) | ||
| set(_REFLECTION gRPC::grpc++_reflection) | ||
| if(CMAKE_CROSSCOMPILING) | ||
| find_program(_PROTOBUF_PROTOC protoc) | ||
| else() | ||
| set(_PROTOBUF_PROTOC $<TARGET_FILE:protobuf::protoc>) | ||
| endif() | ||
|
|
||
| # 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}") | ||
|
|
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| set(_GRPC_GRPCPP gRPC::grpc++) | ||
| if(CMAKE_CROSSCOMPILING) | ||
| find_program(_GRPC_CPP_PLUGIN_EXECUTABLE grpc_cpp_plugin) | ||
| else() | ||
| set(_GRPC_CPP_PLUGIN_EXECUTABLE $<TARGET_FILE:gRPC::grpc_cpp_plugin>) | ||
| endif() | ||
| endif() |
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