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096bfdeff6
Due to a regression in c-ares 1.34.1, the non-pkg-config version
detection method broke for this version. c-ares 1.34.2 fixes it,
but update our detection code anyway to also work with 1.34.1.
Ref:
126e274159
https://github.com/c-ares/c-ares/pull/903
Closes #15368
90 lines
3.1 KiB
CMake
90 lines
3.1 KiB
CMake
#***************************************************************************
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# _ _ ____ _
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# Project ___| | | | _ \| |
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# / __| | | | |_) | |
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# | (__| |_| | _ <| |___
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# \___|\___/|_| \_\_____|
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#
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# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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#
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# This software is licensed as described in the file COPYING, which
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# you should have received as part of this distribution. The terms
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# are also available at https://curl.se/docs/copyright.html.
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#
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# You may opt to use, copy, modify, merge, publish, distribute and/or sell
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# copies of the Software, and permit persons to whom the Software is
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# furnished to do so, under the terms of the COPYING file.
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#
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# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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# KIND, either express or implied.
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#
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# SPDX-License-Identifier: curl
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#
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###########################################################################
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# Find the c-ares library
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#
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# Input variables:
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#
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# CARES_INCLUDE_DIR The c-ares include directory
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# CARES_LIBRARY Path to c-ares library
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#
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# Result variables:
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#
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# CARES_FOUND System has c-ares
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# CARES_INCLUDE_DIRS The c-ares include directories
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# CARES_LIBRARIES The c-ares library names
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# CARES_VERSION Version of c-ares
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if(CURL_USE_PKGCONFIG)
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find_package(PkgConfig QUIET)
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pkg_check_modules(PC_CARES "libcares")
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endif()
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find_path(CARES_INCLUDE_DIR NAMES "ares.h"
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HINTS
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${PC_CARES_INCLUDEDIR}
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${PC_CARES_INCLUDE_DIRS}
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)
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find_library(CARES_LIBRARY NAMES ${CARES_NAMES} "cares"
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HINTS
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${PC_CARES_LIBDIR}
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${PC_CARES_LIBRARY_DIRS}
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)
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if(PC_CARES_VERSION)
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set(CARES_VERSION ${PC_CARES_VERSION})
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elseif(CARES_INCLUDE_DIR AND EXISTS "${CARES_INCLUDE_DIR}/ares_version.h")
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set(_version_regex1 "#[\t ]*define[\t ]+ARES_VERSION_MAJOR[\t ]+([0-9]+).*")
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set(_version_regex2 "#[\t ]*define[\t ]+ARES_VERSION_MINOR[\t ]+([0-9]+).*")
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set(_version_regex3 "#[\t ]*define[\t ]+ARES_VERSION_PATCH[\t ]+([0-9]+).*")
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file(STRINGS "${CARES_INCLUDE_DIR}/ares_version.h" _version_str1 REGEX "${_version_regex1}")
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file(STRINGS "${CARES_INCLUDE_DIR}/ares_version.h" _version_str2 REGEX "${_version_regex2}")
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file(STRINGS "${CARES_INCLUDE_DIR}/ares_version.h" _version_str3 REGEX "${_version_regex3}")
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string(REGEX REPLACE "${_version_regex1}" "\\1" _version_str1 "${_version_str1}")
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string(REGEX REPLACE "${_version_regex2}" "\\1" _version_str2 "${_version_str2}")
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string(REGEX REPLACE "${_version_regex3}" "\\1" _version_str3 "${_version_str3}")
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set(CARES_VERSION "${_version_str1}.${_version_str2}.${_version_str3}")
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unset(_version_regex1)
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unset(_version_regex2)
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unset(_version_regex3)
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unset(_version_str1)
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unset(_version_str2)
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unset(_version_str3)
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endif()
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(Cares
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REQUIRED_VARS
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CARES_INCLUDE_DIR
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CARES_LIBRARY
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VERSION_VAR
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CARES_VERSION
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)
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if(CARES_FOUND)
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set(CARES_INCLUDE_DIRS ${CARES_INCLUDE_DIR})
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set(CARES_LIBRARIES ${CARES_LIBRARY})
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endif()
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mark_as_advanced(CARES_INCLUDE_DIR CARES_LIBRARY)
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