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b92ead34dd
The oldest cmake supported by curl is v3.7.0, which already has such
guard (using `PKG_CONFIG_EXECUTABLE`) inside `pkg_check_modules()`. The
advantage of leaving that guard to CMake is that it will define/reset
all output variables, while the manual guard doesn't do this and also
leaves for example `NETTLE_FOUND` undefined.
Delete the single use of this guard from the recently added `nettle`
detection, where I included it by accident. Then possibly re-introduce
it universally if we find it useful after more evaluation.
Follow-up to 669ce42275 #14285
Closes #14309
76 lines
2.7 KiB
CMake
76 lines
2.7 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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# - Try to find the nettle library
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# Once done this will define
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#
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# NETTLE_FOUND - system has nettle
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# NETTLE_INCLUDE_DIRS - nettle include directories
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# NETTLE_LIBRARIES - nettle library names
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if(UNIX)
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find_package(PkgConfig QUIET)
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pkg_check_modules(NETTLE "nettle")
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endif()
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if(NETTLE_FOUND)
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set(NETTLE_LIBRARIES ${NETTLE_LINK_LIBRARIES})
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else()
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find_path(NETTLE_INCLUDE_DIR NAMES "nettle/sha2.h")
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find_library(NETTLE_LIBRARY NAMES "nettle")
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if(NETTLE_INCLUDE_DIR)
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if(EXISTS "${NETTLE_INCLUDE_DIR}/nettle/version.h")
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set(_version_regex_major "^#define[ \t]+NETTLE_VERSION_MAJOR[ \t]+([0-9]+).*")
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set(_version_regex_minor "^#define[ \t]+NETTLE_VERSION_MINOR[ \t]+([0-9]+).*")
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file(STRINGS "${NETTLE_INCLUDE_DIR}/nettle/version.h"
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_version_major REGEX "${_version_regex_major}")
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file(STRINGS "${NETTLE_INCLUDE_DIR}/nettle/version.h"
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_version_minor REGEX "${_version_regex_minor}")
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string(REGEX REPLACE "${_version_regex_major}" "\\1" _version_major "${_version_major}")
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string(REGEX REPLACE "${_version_regex_minor}" "\\1" _version_minor "${_version_minor}")
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unset(_version_regex_major)
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unset(_version_regex_minor)
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set(NETTLE_VERSION "${_version_major}.${_version_minor}")
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unset(_version_major)
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unset(_version_minor)
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else()
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set(NETTLE_VERSION "0.0")
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endif()
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endif()
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args("nettle"
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REQUIRED_VARS
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NETTLE_INCLUDE_DIR
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NETTLE_LIBRARY
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VERSION_VAR NETTLE_VERSION)
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if(NETTLE_FOUND)
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set(NETTLE_INCLUDE_DIRS ${NETTLE_INCLUDE_DIR})
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set(NETTLE_LIBRARIES ${NETTLE_LIBRARY})
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endif()
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mark_as_advanced(NETTLE_INCLUDE_DIR NETTLE_LIBRARY)
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endif()
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