1 # Copyright 2018 gRPC authors. 2 # 3 # Licensed under the Apache License, Version 2.0 (the "License"); 4 # you may not use this file except in compliance with the License. 5 # You may obtain a copy of the License at 6 # 7 # http://www.apache.org/licenses/LICENSE-2.0 8 # 9 # Unless required by applicable law or agreed to in writing, software 10 # distributed under the License is distributed on an "AS IS" BASIS, 11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 # See the License for the specific language governing permissions and 13 # limitations under the License. 14 # 15 # cmake "superbuild" file for C++ helloworld example. 16 # This build file demonstrates how to build the helloworld project 17 # and all its dependencies in a single cmake build (hence "superbuild") 18 # that is easy to build and maintain. 19 # cmake's ExternalProject_Add() is used to import all the sub-projects, 20 # including the "helloworld" project itself. 21 # See https://blog.kitware.com/cmake-superbuilds-git-submodules/ 22 23 cmake_minimum_required(VERSION 2.8) 24 25 # Project 26 project(HelloWorld-SuperBuild C CXX) 27 28 include(ExternalProject) 29 30 # Builds c-ares project from the git submodule. 31 # Note: For all external projects, instead of using checked-out code, one could 32 # specify GIT_REPOSITORY and GIT_TAG to have cmake download the dependency directly, 33 # without needing to add a submodule to your project. 34 ExternalProject_Add(c-ares 35 PREFIX c-ares 36 SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../../../../third_party/cares/cares" 37 CMAKE_CACHE_ARGS 38 -DCARES_SHARED:BOOL=OFF 39 -DCARES_STATIC:BOOL=ON 40 -DCARES_STATIC_PIC:BOOL=ON 41 -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_CURRENT_BINARY_DIR}/c-ares 42 ) 43 44 # Builds protobuf project from the git submodule. 45 ExternalProject_Add(protobuf 46 PREFIX protobuf 47 SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../../../../third_party/protobuf/cmake" 48 CMAKE_CACHE_ARGS 49 -Dprotobuf_BUILD_TESTS:BOOL=OFF 50 -Dprotobuf_WITH_ZLIB:BOOL=OFF 51 -Dprotobuf_MSVC_STATIC_RUNTIME:BOOL=OFF 52 -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_CURRENT_BINARY_DIR}/protobuf 53 ) 54 55 # Builds zlib project from the git submodule. 56 ExternalProject_Add(zlib 57 PREFIX zlib 58 SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../../../../third_party/zlib" 59 CMAKE_CACHE_ARGS 60 -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_CURRENT_BINARY_DIR}/zlib 61 ) 62 63 # the location where protobuf-config.cmake will be installed varies by platform 64 if (WIN32) 65 set(_FINDPACKAGE_PROTOBUF_CONFIG_DIR "${CMAKE_CURRENT_BINARY_DIR}/protobuf/cmake") 66 else() 67 set(_FINDPACKAGE_PROTOBUF_CONFIG_DIR "${CMAKE_CURRENT_BINARY_DIR}/protobuf/lib/cmake/protobuf") 68 endif() 69 70 # if OPENSSL_ROOT_DIR is set, propagate that hint path to the external projects with OpenSSL dependency. 71 set(_CMAKE_ARGS_OPENSSL_ROOT_DIR "") 72 if (OPENSSL_ROOT_DIR) 73 set(_CMAKE_ARGS_OPENSSL_ROOT_DIR "-DOPENSSL_ROOT_DIR:PATH=${OPENSSL_ROOT_DIR}") 74 endif() 75 76 # Builds gRPC based on locally checked-out sources and set arguments so that all the dependencies 77 # are correctly located. 78 ExternalProject_Add(grpc 79 PREFIX grpc 80 SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../../../.." 81 CMAKE_CACHE_ARGS 82 -DgRPC_INSTALL:BOOL=ON 83 -DgRPC_BUILD_TESTS:BOOL=OFF 84 -DgRPC_PROTOBUF_PROVIDER:STRING=package 85 -DgRPC_PROTOBUF_PACKAGE_TYPE:STRING=CONFIG 86 -DProtobuf_DIR:PATH=${_FINDPACKAGE_PROTOBUF_CONFIG_DIR} 87 -DgRPC_ZLIB_PROVIDER:STRING=package 88 -DZLIB_ROOT:STRING=${CMAKE_CURRENT_BINARY_DIR}/zlib 89 -DgRPC_CARES_PROVIDER:STRING=package 90 -Dc-ares_DIR:PATH=${CMAKE_CURRENT_BINARY_DIR}/c-ares/lib/cmake/c-ares 91 -DgRPC_SSL_PROVIDER:STRING=package 92 ${_CMAKE_ARGS_OPENSSL_ROOT_DIR} 93 -DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_CURRENT_BINARY_DIR}/grpc 94 DEPENDS c-ares protobuf zlib 95 ) 96 97 # Build the helloworld projects itself using a CMakeLists.txt that assumes all the dependencies 98 # have already been installed. 99 # Even though helloworld is not really an "external project" from perspective of this build, 100 # we are still importing it using ExternalProject_Add because that allows us to use find_package() 101 # to locate all the dependencies (if we were building helloworld directly in this build we, 102 # we would have needed to manually import the libraries as opposed to reusing targets exported by 103 # gRPC and protobuf). 104 ExternalProject_Add(helloworld 105 PREFIX helloworld 106 SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/.." 107 BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/helloworld" 108 INSTALL_COMMAND "" 109 CMAKE_CACHE_ARGS 110 -DProtobuf_DIR:PATH=${_FINDPACKAGE_PROTOBUF_CONFIG_DIR} 111 -Dc-ares_DIR:PATH=${CMAKE_CURRENT_BINARY_DIR}/c-ares/lib/cmake/c-ares 112 -DZLIB_ROOT:STRING=${CMAKE_CURRENT_BINARY_DIR}/zlib 113 ${_CMAKE_ARGS_OPENSSL_ROOT_DIR} 114 -DgRPC_DIR:PATH=${CMAKE_CURRENT_BINARY_DIR}/grpc/lib/cmake/grpc 115 DEPENDS protobuf grpc 116 ) 117
