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      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_CARES_PROVIDER}" STREQUAL "module")
     16   if(NOT CARES_ROOT_DIR)
     17     set(CARES_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/third_party/cares/cares)
     18   endif()
     19   set(CARES_SHARED OFF CACHE BOOL "disable shared library")
     20   set(CARES_STATIC ON CACHE BOOL "link cares statically")
     21   add_subdirectory(third_party/cares/cares)
     22 
     23   if(TARGET c-ares)
     24     set(_gRPC_CARES_LIBRARIES c-ares)
     25     set(_gRPC_CARES_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/third_party/cares/cares" "${CMAKE_CURRENT_BINARY_DIR}/third_party/cares/cares")
     26   endif()
     27 
     28   if(gRPC_INSTALL)
     29     message(WARNING "gRPC_INSTALL will be forced to FALSE because gRPC_CARES_PROVIDER is \"module\"")
     30     set(gRPC_INSTALL FALSE)
     31   endif()
     32 elseif("${gRPC_CARES_PROVIDER}" STREQUAL "package")
     33   # Use "CONFIG" as there is no built-in cmake module for c-ares.
     34   find_package(c-ares REQUIRED CONFIG)
     35   if(TARGET c-ares::cares)
     36     set(_gRPC_CARES_LIBRARIES c-ares::cares)
     37     set(_gRPC_CARES_INCLUDE_DIR ${c-ares_INCLUDE_DIR})
     38   endif()
     39   set(_gRPC_FIND_CARES "if(NOT c-ares_FOUND)\n  find_package(c-ares CONFIG)\nendif()")
     40 endif()
     41