FindCares.cmake (3730B)
1 #*************************************************************************** 2 # _ _ ____ _ 3 # Project ___| | | | _ \| | 4 # / __| | | | |_) | | 5 # | (__| |_| | _ <| |___ 6 # \___|\___/|_| \_\_____| 7 # 8 # Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 9 # 10 # This software is licensed as described in the file COPYING, which 11 # you should have received as part of this distribution. The terms 12 # are also available at https://curl.se/docs/copyright.html. 13 # 14 # You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 # copies of the Software, and permit persons to whom the Software is 16 # furnished to do so, under the terms of the COPYING file. 17 # 18 # This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 # KIND, either express or implied. 20 # 21 # SPDX-License-Identifier: curl 22 # 23 ########################################################################### 24 # Find the c-ares library 25 # 26 # Input variables: 27 # 28 # - `CARES_INCLUDE_DIR`: The c-ares include directory. 29 # - `CARES_LIBRARY`: Path to `cares` library. 30 # 31 # Result variables: 32 # 33 # - `CARES_FOUND`: System has c-ares. 34 # - `CARES_INCLUDE_DIRS`: The c-ares include directories. 35 # - `CARES_LIBRARIES`: The c-ares library names. 36 # - `CARES_LIBRARY_DIRS`: The c-ares library directories. 37 # - `CARES_PC_REQUIRES`: The c-ares pkg-config packages. 38 # - `CARES_CFLAGS`: Required compiler flags. 39 # - `CARES_VERSION`: Version of c-ares. 40 41 set(CARES_PC_REQUIRES "libcares") 42 43 if(CURL_USE_PKGCONFIG AND 44 NOT DEFINED CARES_INCLUDE_DIR AND 45 NOT DEFINED CARES_LIBRARY) 46 find_package(PkgConfig QUIET) 47 pkg_check_modules(CARES ${CARES_PC_REQUIRES}) 48 endif() 49 50 if(CARES_FOUND) 51 set(Cares_FOUND TRUE) 52 string(REPLACE ";" " " CARES_CFLAGS "${CARES_CFLAGS}") 53 message(STATUS "Found Cares (via pkg-config): ${CARES_INCLUDE_DIRS} (found version \"${CARES_VERSION}\")") 54 else() 55 find_path(CARES_INCLUDE_DIR NAMES "ares.h") 56 find_library(CARES_LIBRARY NAMES ${CARES_NAMES} "cares") 57 58 unset(CARES_VERSION CACHE) 59 if(CARES_INCLUDE_DIR AND EXISTS "${CARES_INCLUDE_DIR}/ares_version.h") 60 set(_version_regex1 "#[\t ]*define[\t ]+ARES_VERSION_MAJOR[\t ]+([0-9]+).*") 61 set(_version_regex2 "#[\t ]*define[\t ]+ARES_VERSION_MINOR[\t ]+([0-9]+).*") 62 set(_version_regex3 "#[\t ]*define[\t ]+ARES_VERSION_PATCH[\t ]+([0-9]+).*") 63 file(STRINGS "${CARES_INCLUDE_DIR}/ares_version.h" _version_str1 REGEX "${_version_regex1}") 64 file(STRINGS "${CARES_INCLUDE_DIR}/ares_version.h" _version_str2 REGEX "${_version_regex2}") 65 file(STRINGS "${CARES_INCLUDE_DIR}/ares_version.h" _version_str3 REGEX "${_version_regex3}") 66 string(REGEX REPLACE "${_version_regex1}" "\\1" _version_str1 "${_version_str1}") 67 string(REGEX REPLACE "${_version_regex2}" "\\1" _version_str2 "${_version_str2}") 68 string(REGEX REPLACE "${_version_regex3}" "\\1" _version_str3 "${_version_str3}") 69 set(CARES_VERSION "${_version_str1}.${_version_str2}.${_version_str3}") 70 unset(_version_regex1) 71 unset(_version_regex2) 72 unset(_version_regex3) 73 unset(_version_str1) 74 unset(_version_str2) 75 unset(_version_str3) 76 endif() 77 78 include(FindPackageHandleStandardArgs) 79 find_package_handle_standard_args(Cares 80 REQUIRED_VARS 81 CARES_INCLUDE_DIR 82 CARES_LIBRARY 83 VERSION_VAR 84 CARES_VERSION 85 ) 86 87 if(CARES_FOUND) 88 set(CARES_INCLUDE_DIRS ${CARES_INCLUDE_DIR}) 89 set(CARES_LIBRARIES ${CARES_LIBRARY}) 90 endif() 91 92 mark_as_advanced(CARES_INCLUDE_DIR CARES_LIBRARY) 93 endif() 94 95 if(CARES_FOUND AND WIN32) 96 list(APPEND CARES_LIBRARIES "iphlpapi") # for if_indextoname and others 97 endif()