1# Copyright 2017 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 15if(gRPC_PROTOBUF_PROVIDER STREQUAL "module") 16 # Building the protobuf tests require gmock what is not part of a standard protobuf checkout. 17 # Disable them unless they are explicitly requested from the cmake command line (when we assume 18 # gmock is downloaded to the right location inside protobuf). 19 if(NOT protobuf_BUILD_TESTS) 20 set(protobuf_BUILD_TESTS OFF CACHE BOOL "Build protobuf tests") 21 endif() 22 # Disable building protobuf with zlib. Building protobuf with zlib breaks 23 # the build if zlib is not installed on the system. 24 if(NOT protobuf_WITH_ZLIB) 25 set(protobuf_WITH_ZLIB OFF CACHE BOOL "Build protobuf with zlib.") 26 endif() 27 if(NOT PROTOBUF_ROOT_DIR) 28 set(PROTOBUF_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/third_party/protobuf) 29 endif() 30 31 if(EXISTS "${PROTOBUF_ROOT_DIR}/CMakeLists.txt") 32 set(protobuf_MSVC_STATIC_RUNTIME OFF CACHE BOOL "Link static runtime libraries") 33 add_subdirectory(${PROTOBUF_ROOT_DIR} third_party/protobuf) 34 if(TARGET ${_gRPC_PROTOBUF_LIBRARY_NAME}) 35 set(_gRPC_PROTOBUF_LIBRARIES ${_gRPC_PROTOBUF_LIBRARY_NAME}) 36 endif() 37 if(TARGET libprotoc) 38 set(_gRPC_PROTOBUF_PROTOC_LIBRARIES libprotoc) 39 endif() 40 if(TARGET protoc) 41 set(_gRPC_PROTOBUF_PROTOC protoc) 42 if(CMAKE_CROSSCOMPILING) 43 find_program(_gRPC_PROTOBUF_PROTOC_EXECUTABLE protoc) 44 else() 45 set(_gRPC_PROTOBUF_PROTOC_EXECUTABLE $<TARGET_FILE:protoc>) 46 endif() 47 endif() 48 # For well-known .proto files distributed with protobuf 49 set(_gRPC_PROTOBUF_WELLKNOWN_INCLUDE_DIR "${PROTOBUF_ROOT_DIR}/src") 50 else() 51 message(WARNING "gRPC_PROTOBUF_PROVIDER is \"module\" but PROTOBUF_ROOT_DIR is wrong") 52 endif() 53 if(gRPC_INSTALL AND NOT _gRPC_INSTALL_SUPPORTED_FROM_MODULE) 54 message(WARNING "gRPC_INSTALL will be forced to FALSE because gRPC_PROTOBUF_PROVIDER is \"module\" and CMake version (${CMAKE_VERSION}) is less than 3.13.") 55 set(gRPC_INSTALL FALSE) 56 endif() 57elseif(gRPC_PROTOBUF_PROVIDER STREQUAL "package") 58 find_package(Protobuf REQUIRED CONFIG) 59 60 if(Protobuf_FOUND OR PROTOBUF_FOUND) 61 if(TARGET protobuf::${_gRPC_PROTOBUF_LIBRARY_NAME}) 62 set(_gRPC_PROTOBUF_LIBRARIES protobuf::${_gRPC_PROTOBUF_LIBRARY_NAME}) 63 else() 64 set(_gRPC_PROTOBUF_LIBRARIES ${PROTOBUF_LIBRARIES}) 65 endif() 66 if(TARGET protobuf::libprotoc) 67 set(_gRPC_PROTOBUF_PROTOC_LIBRARIES protobuf::libprotoc) 68 # extract the include dir from target's properties 69 get_target_property(_gRPC_PROTOBUF_WELLKNOWN_INCLUDE_DIR protobuf::libprotoc INTERFACE_INCLUDE_DIRECTORIES) 70 else() 71 set(_gRPC_PROTOBUF_PROTOC_LIBRARIES ${PROTOBUF_PROTOC_LIBRARIES}) 72 set(_gRPC_PROTOBUF_WELLKNOWN_INCLUDE_DIR ${PROTOBUF_INCLUDE_DIRS}) 73 endif() 74 if(TARGET protobuf::protoc) 75 set(_gRPC_PROTOBUF_PROTOC protobuf::protoc) 76 if(CMAKE_CROSSCOMPILING) 77 find_program(_gRPC_PROTOBUF_PROTOC_EXECUTABLE protoc) 78 else() 79 set(_gRPC_PROTOBUF_PROTOC_EXECUTABLE $<TARGET_FILE:protobuf::protoc>) 80 endif() 81 else() 82 set(_gRPC_PROTOBUF_PROTOC ${PROTOBUF_PROTOC_EXECUTABLE}) 83 if(CMAKE_CROSSCOMPILING) 84 find_program(_gRPC_PROTOBUF_PROTOC_EXECUTABLE protoc) 85 else() 86 set(_gRPC_PROTOBUF_PROTOC_EXECUTABLE ${PROTOBUF_PROTOC_EXECUTABLE}) 87 endif() 88 endif() 89 set(_gRPC_FIND_PROTOBUF "include(CMakeFindDependencyMacro)\nfind_dependency(Protobuf CONFIG)") 90 endif() 91endif() 92