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#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
###########################################################################
# Find the c-ares library
#
# Input variables:
#
# - `CARES_INCLUDE_DIR`: The c-ares include directory.
# - `CARES_LIBRARY`: Path to `cares` library.
#
# Result variables:
#
# - `CARES_FOUND`: System has c-ares.
# - `CARES_INCLUDE_DIRS`: The c-ares include directories.
# - `CARES_LIBRARIES`: The c-ares library names.
# - `CARES_LIBRARY_DIRS`: The c-ares library directories.
# - `CARES_PC_REQUIRES`: The c-ares pkg-config packages.
# - `CARES_CFLAGS`: Required compiler flags.
# - `CARES_VERSION`: Version of c-ares.
set(CARES_PC_REQUIRES "libcares")
if(CURL_USE_PKGCONFIG AND
NOT DEFINED CARES_INCLUDE_DIR AND
NOT DEFINED CARES_LIBRARY)
find_package(PkgConfig QUIET)
pkg_check_modules(CARES ${CARES_PC_REQUIRES})
endif()
if(CARES_FOUND)
set(Cares_FOUND TRUE)
string(REPLACE ";" " " CARES_CFLAGS "${CARES_CFLAGS}")
message(STATUS "Found Cares (via pkg-config): ${CARES_INCLUDE_DIRS} (found version \"${CARES_VERSION}\")")
else()
find_path(CARES_INCLUDE_DIR NAMES "ares.h")
find_library(CARES_LIBRARY NAMES ${CARES_NAMES} "cares")
unset(CARES_VERSION CACHE)
if(CARES_INCLUDE_DIR AND EXISTS "${CARES_INCLUDE_DIR}/ares_version.h")
set(_version_regex1 "#[\t ]*define[\t ]+ARES_VERSION_MAJOR[\t ]+([0-9]+).*")
set(_version_regex2 "#[\t ]*define[\t ]+ARES_VERSION_MINOR[\t ]+([0-9]+).*")
set(_version_regex3 "#[\t ]*define[\t ]+ARES_VERSION_PATCH[\t ]+([0-9]+).*")
file(STRINGS "${CARES_INCLUDE_DIR}/ares_version.h" _version_str1 REGEX "${_version_regex1}")
file(STRINGS "${CARES_INCLUDE_DIR}/ares_version.h" _version_str2 REGEX "${_version_regex2}")
file(STRINGS "${CARES_INCLUDE_DIR}/ares_version.h" _version_str3 REGEX "${_version_regex3}")
string(REGEX REPLACE "${_version_regex1}" "\\1" _version_str1 "${_version_str1}")
string(REGEX REPLACE "${_version_regex2}" "\\1" _version_str2 "${_version_str2}")
string(REGEX REPLACE "${_version_regex3}" "\\1" _version_str3 "${_version_str3}")
set(CARES_VERSION "${_version_str1}.${_version_str2}.${_version_str3}")
unset(_version_regex1)
unset(_version_regex2)
unset(_version_regex3)
unset(_version_str1)
unset(_version_str2)
unset(_version_str3)
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Cares
REQUIRED_VARS
CARES_INCLUDE_DIR
CARES_LIBRARY
VERSION_VAR
CARES_VERSION
)
if(CARES_FOUND)
set(CARES_INCLUDE_DIRS ${CARES_INCLUDE_DIR})
set(CARES_LIBRARIES ${CARES_LIBRARY})
endif()
mark_as_advanced(CARES_INCLUDE_DIR CARES_LIBRARY)
endif()
if(CARES_FOUND AND WIN32)
list(APPEND CARES_LIBRARIES "iphlpapi") # for if_indextoname and others
endif()
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