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_ZLIB_PROVIDER}" STREQUAL "module") 16 if(NOT ZLIB_ROOT_DIR) 17 set(ZLIB_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/third_party/zlib) 18 endif() 19 if(EXISTS "${ZLIB_ROOT_DIR}/CMakeLists.txt") 20 # TODO(jtattermusch): workaround for https://github.com/madler/zlib/issues/218 21 include_directories("${ZLIB_ROOT_DIR}") 22 add_subdirectory(${ZLIB_ROOT_DIR} third_party/zlib) 23 24 if(TARGET zlibstatic) 25 set(_gRPC_ZLIB_LIBRARIES zlibstatic) 26 set(_gRPC_ZLIB_INCLUDE_DIR "${ZLIB_ROOT_DIR}" "${CMAKE_CURRENT_BINARY_DIR}/third_party/zlib") 27 endif() 28 else() 29 message(WARNING "gRPC_ZLIB_PROVIDER is \"module\" but ZLIB_ROOT_DIR is wrong") 30 endif() 31 if(gRPC_INSTALL) 32 message(WARNING "gRPC_INSTALL will be forced to FALSE because gRPC_ZLIB_PROVIDER is \"module\"") 33 set(gRPC_INSTALL FALSE) 34 endif() 35elseif("${gRPC_ZLIB_PROVIDER}" STREQUAL "package") 36 # zlib installation directory can be configured by setting ZLIB_ROOT 37 # We allow locating zlib using both "CONFIG" and "MODULE" as the expectation 38 # is that many Linux systems will have zlib installed via a distribution 39 # package ("MODULE"), while on Windows the user is likely to have installed 40 # zlib using cmake ("CONFIG"). 41 # See https://cmake.org/cmake/help/v3.6/module/FindZLIB.html 42 find_package(ZLIB REQUIRED) 43 44 if(TARGET ZLIB::ZLIB) 45 set(_gRPC_ZLIB_LIBRARIES ZLIB::ZLIB) 46 else() 47 set(_gRPC_ZLIB_LIBRARIES ${ZLIB_LIBRARIES}) 48 endif() 49 set(_gRPC_ZLIB_INCLUDE_DIR ${ZLIB_INCLUDE_DIRS}) 50 set(_gRPC_FIND_ZLIB "if(NOT ZLIB_FOUND)\n find_package(ZLIB)\nendif()") 51endif() 52