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_VERSION`: Version of c-ares. 37 38if(CURL_USE_PKGCONFIG) 39 find_package(PkgConfig QUIET) 40 pkg_check_modules(PC_CARES "libcares") 41endif() 42 43find_path(CARES_INCLUDE_DIR NAMES "ares.h" 44 HINTS 45 ${PC_CARES_INCLUDEDIR} 46 ${PC_CARES_INCLUDE_DIRS} 47) 48 49find_library(CARES_LIBRARY NAMES ${CARES_NAMES} "cares" 50 HINTS 51 ${PC_CARES_LIBDIR} 52 ${PC_CARES_LIBRARY_DIRS} 53) 54 55if(PC_CARES_VERSION) 56 set(CARES_VERSION ${PC_CARES_VERSION}) 57elseif(CARES_INCLUDE_DIR AND EXISTS "${CARES_INCLUDE_DIR}/ares_version.h") 58 set(_version_regex1 "#[\t ]*define[\t ]+ARES_VERSION_MAJOR[\t ]+([0-9]+).*") 59 set(_version_regex2 "#[\t ]*define[\t ]+ARES_VERSION_MINOR[\t ]+([0-9]+).*") 60 set(_version_regex3 "#[\t ]*define[\t ]+ARES_VERSION_PATCH[\t ]+([0-9]+).*") 61 file(STRINGS "${CARES_INCLUDE_DIR}/ares_version.h" _version_str1 REGEX "${_version_regex1}") 62 file(STRINGS "${CARES_INCLUDE_DIR}/ares_version.h" _version_str2 REGEX "${_version_regex2}") 63 file(STRINGS "${CARES_INCLUDE_DIR}/ares_version.h" _version_str3 REGEX "${_version_regex3}") 64 string(REGEX REPLACE "${_version_regex1}" "\\1" _version_str1 "${_version_str1}") 65 string(REGEX REPLACE "${_version_regex2}" "\\1" _version_str2 "${_version_str2}") 66 string(REGEX REPLACE "${_version_regex3}" "\\1" _version_str3 "${_version_str3}") 67 set(CARES_VERSION "${_version_str1}.${_version_str2}.${_version_str3}") 68 unset(_version_regex1) 69 unset(_version_regex2) 70 unset(_version_regex3) 71 unset(_version_str1) 72 unset(_version_str2) 73 unset(_version_str3) 74endif() 75 76include(FindPackageHandleStandardArgs) 77find_package_handle_standard_args(Cares 78 REQUIRED_VARS 79 CARES_INCLUDE_DIR 80 CARES_LIBRARY 81 VERSION_VAR 82 CARES_VERSION 83) 84 85if(CARES_FOUND) 86 set(CARES_INCLUDE_DIRS ${CARES_INCLUDE_DIR}) 87 set(CARES_LIBRARIES ${CARES_LIBRARY}) 88endif() 89 90mark_as_advanced(CARES_INCLUDE_DIR CARES_LIBRARY) 91
