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 15 if("${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}/cmake/CMakeLists.txt") 32 set(protobuf_MSVC_STATIC_RUNTIME OFF CACHE BOOL "Link static runtime libraries") 33 add_subdirectory(${PROTOBUF_ROOT_DIR}/cmake 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 set(_gRPC_PROTOBUF_PROTOC_EXECUTABLE $<TARGET_FILE:protoc>) 43 endif() 44 set(_gRPC_PROTOBUF_INCLUDE_DIR "${PROTOBUF_ROOT_DIR}") 45 # For well-known .proto files distributed with protobuf 46 set(_gRPC_PROTOBUF_WELLKNOWN_INCLUDE_DIR "${PROTOBUF_ROOT_DIR}/src") 47 else() 48 message(WARNING "gRPC_PROTOBUF_PROVIDER is \"module\" but PROTOBUF_ROOT_DIR is wrong") 49 endif() 50 if(gRPC_INSTALL) 51 message(WARNING "gRPC_INSTALL will be forced to FALSE because gRPC_PROTOBUF_PROVIDER is \"module\"") 52 set(gRPC_INSTALL FALSE) 53 endif() 54 elseif("${gRPC_PROTOBUF_PROVIDER}" STREQUAL "package") 55 find_package(Protobuf REQUIRED ${gRPC_PROTOBUF_PACKAGE_TYPE}) 56 57 # {Protobuf,PROTOBUF}_FOUND is defined based on find_package type ("MODULE" vs "CONFIG"). 58 # For "MODULE", the case has also changed between cmake 3.5 and 3.6. 59 # We use the legacy uppercase version for *_LIBRARIES AND *_INCLUDE_DIRS variables 60 # as newer cmake versions provide them too for backward compatibility. 61 if(Protobuf_FOUND OR PROTOBUF_FOUND) 62 if(TARGET protobuf::${_gRPC_PROTOBUF_LIBRARY_NAME}) 63 set(_gRPC_PROTOBUF_LIBRARIES protobuf::${_gRPC_PROTOBUF_LIBRARY_NAME}) 64 else() 65 set(_gRPC_PROTOBUF_LIBRARIES ${PROTOBUF_LIBRARIES}) 66 endif() 67 if(TARGET protobuf::libprotoc) 68 set(_gRPC_PROTOBUF_PROTOC_LIBRARIES protobuf::libprotoc) 69 # extract the include dir from target's properties 70 get_target_property(_gRPC_PROTOBUF_WELLKNOWN_INCLUDE_DIR protobuf::libprotoc INTERFACE_INCLUDE_DIRECTORIES) 71 else() 72 set(_gRPC_PROTOBUF_PROTOC_LIBRARIES ${PROTOBUF_PROTOC_LIBRARIES}) 73 set(_gRPC_PROTOBUF_WELLKNOWN_INCLUDE_DIR ${PROTOBUF_INCLUDE_DIRS}) 74 endif() 75 if(TARGET protobuf::protoc) 76 set(_gRPC_PROTOBUF_PROTOC protobuf::protoc) 77 set(_gRPC_PROTOBUF_PROTOC_EXECUTABLE $<TARGET_FILE:protobuf::protoc>) 78 else() 79 set(_gRPC_PROTOBUF_PROTOC ${PROTOBUF_PROTOC_EXECUTABLE}) 80 set(_gRPC_PROTOBUF_PROTOC_EXECUTABLE ${PROTOBUF_PROTOC_EXECUTABLE}) 81 endif() 82 set(_gRPC_PROTOBUF_INCLUDE_DIR ${PROTOBUF_INCLUDE_DIRS}) 83 set(_gRPC_FIND_PROTOBUF "if(NOT Protobuf_FOUND AND NOT PROTOBUF_FOUND)\n find_package(Protobuf ${gRPC_PROTOBUF_PACKAGE_TYPE})\nendif()") 84 endif() 85 endif() 86
