269 lines
10 KiB
CMake
269 lines
10 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 GSS Kerberos library
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#
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# Input variables:
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#
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# - `GSS_ROOT_DIR`: Absolute path to the root installation of GSS. (also supported as environment)
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#
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# Result variables:
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#
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# - `GSS_FOUND`: System has a GSS library.
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# - `GSS_FLAVOUR`: "GNU" or "MIT" if anything found.
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# - `GSS_INCLUDE_DIRS`: The GSS include directories.
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# - `GSS_LIBRARIES`: The GSS library names.
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# - `GSS_LIBRARY_DIRS`: The GSS library directories.
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# - `GSS_PC_REQUIRES`: The GSS pkg-config packages.
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# - `GSS_CFLAGS`: Required compiler flags.
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# - `GSS_VERSION`: This is set to version advertised by pkg-config or read from manifest.
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# In case the library is found but no version info available it is set to "unknown"
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set(_gnu_modname "gss")
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set(_mit_modname "mit-krb5-gssapi")
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include(CheckIncludeFile)
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include(CheckIncludeFiles)
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include(CheckTypeSize)
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set(_gss_root_hints "${GSS_ROOT_DIR}" "$ENV{GSS_ROOT_DIR}")
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set(_gss_CFLAGS "")
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set(_gss_LIBRARY_DIRS "")
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# Try to find library using system pkg-config if user did not specify root dir
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if(NOT GSS_ROOT_DIR AND NOT "$ENV{GSS_ROOT_DIR}")
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if(CURL_USE_PKGCONFIG)
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find_package(PkgConfig QUIET)
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pkg_search_module(_gss ${_gnu_modname} ${_mit_modname})
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list(APPEND _gss_root_hints "${_gss_PREFIX}")
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set(_gss_version "${_gss_VERSION}")
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endif()
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if(WIN32)
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list(APPEND _gss_root_hints "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MIT\\Kerberos;InstallDir]")
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endif()
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endif()
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if(NOT _gss_FOUND) # Not found by pkg-config. Let us take more traditional approach.
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find_file(_gss_configure_script NAMES "krb5-config" PATH_SUFFIXES "bin" HINTS ${_gss_root_hints}
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NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH)
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# If not found in user-supplied directories, maybe system knows better
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find_file(_gss_configure_script NAMES "krb5-config" PATH_SUFFIXES "bin")
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if(_gss_configure_script)
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set(_gss_INCLUDE_DIRS "")
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set(_gss_LIBRARIES "")
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execute_process(COMMAND ${_gss_configure_script} "--cflags" "gssapi"
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OUTPUT_VARIABLE _gss_cflags_raw
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RESULT_VARIABLE _gss_configure_failed
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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message(STATUS "FindGSS krb5-config --cflags: ${_gss_cflags_raw}")
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if(NOT _gss_configure_failed) # 0 means success
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# Should also work in an odd case when multiple directories are given.
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string(STRIP "${_gss_cflags_raw}" _gss_cflags_raw)
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string(REGEX REPLACE " +-(I)" ";-\\1" _gss_cflags_raw "${_gss_cflags_raw}")
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string(REGEX REPLACE " +-([^I][^ \\t;]*)" ";-\\1" _gss_cflags_raw "${_gss_cflags_raw}")
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foreach(_flag IN LISTS _gss_cflags_raw)
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if(_flag MATCHES "^-I")
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string(REGEX REPLACE "^-I" "" _flag "${_flag}")
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list(APPEND _gss_INCLUDE_DIRS "${_flag}")
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else()
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list(APPEND _gss_CFLAGS "${_flag}")
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endif()
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endforeach()
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endif()
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execute_process(COMMAND ${_gss_configure_script} "--libs" "gssapi"
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OUTPUT_VARIABLE _gss_lib_flags
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RESULT_VARIABLE _gss_configure_failed
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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message(STATUS "FindGSS krb5-config --libs: ${_gss_lib_flags}")
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if(NOT _gss_configure_failed) # 0 means success
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# This script gives us libraries and link directories.
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string(STRIP "${_gss_lib_flags}" _gss_lib_flags)
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string(REGEX REPLACE " +-(L|l)" ";-\\1" _gss_lib_flags "${_gss_lib_flags}")
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string(REGEX REPLACE " +-([^Ll][^ \\t;]*)" ";-\\1" _gss_lib_flags "${_gss_lib_flags}")
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foreach(_flag IN LISTS _gss_lib_flags)
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if(_flag MATCHES "^-l")
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string(REGEX REPLACE "^-l" "" _flag "${_flag}")
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list(APPEND _gss_LIBRARIES "${_flag}")
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elseif(_flag MATCHES "^-L")
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string(REGEX REPLACE "^-L" "" _flag "${_flag}")
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list(APPEND _gss_LIBRARY_DIRS "${_flag}")
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endif()
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endforeach()
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endif()
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execute_process(COMMAND ${_gss_configure_script} "--version"
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OUTPUT_VARIABLE _gss_version
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RESULT_VARIABLE _gss_configure_failed
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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# Older versions may not have the "--version" parameter. In this case we just do not care.
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if(_gss_configure_failed)
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set(_gss_version 0)
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else()
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# Strip prefix string to leave the version number only
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string(REPLACE "Kerberos 5 release " "" _gss_version "${_gss_version}")
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endif()
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execute_process(COMMAND ${_gss_configure_script} "--vendor"
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OUTPUT_VARIABLE _gss_vendor
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RESULT_VARIABLE _gss_configure_failed
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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# Older versions may not have the "--vendor" parameter. In this case we just do not care.
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if(NOT _gss_configure_failed AND NOT _gss_vendor MATCHES "Heimdal|heimdal")
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set(GSS_FLAVOUR "MIT") # assume a default, should not really matter
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endif()
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else() # Either there is no config script or we are on a platform that does not provide one (Windows?)
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find_path(_gss_INCLUDE_DIRS NAMES "gssapi/gssapi.h" HINTS ${_gss_root_hints} PATH_SUFFIXES "include" "inc")
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if(_gss_INCLUDE_DIRS) # We have found something
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set(_gss_libdir_suffixes "")
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cmake_push_check_state()
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list(APPEND CMAKE_REQUIRED_INCLUDES "${_gss_INCLUDE_DIRS}")
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check_include_files("gssapi/gssapi_generic.h;gssapi/gssapi_krb5.h" _gss_have_mit_headers)
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cmake_pop_check_state()
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if(_gss_have_mit_headers)
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set(GSS_FLAVOUR "MIT")
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if(WIN32)
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if(CMAKE_SIZEOF_VOID_P EQUAL 8)
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list(APPEND _gss_libdir_suffixes "lib/AMD64")
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set(_gss_libname "gssapi64")
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else()
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list(APPEND _gss_libdir_suffixes "lib/i386")
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set(_gss_libname "gssapi32")
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endif()
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else()
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list(APPEND _gss_libdir_suffixes "lib" "lib64") # those suffixes are not checked for HINTS
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set(_gss_libname "gssapi_krb5")
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endif()
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endif()
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else()
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find_path(_gss_INCLUDE_DIRS NAMES "gss.h" HINTS ${_gss_root_hints} PATH_SUFFIXES "include")
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if(_gss_INCLUDE_DIRS)
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set(GSS_FLAVOUR "GNU")
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set(GSS_PC_REQUIRES ${_gnu_modname})
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set(_gss_libname "gss")
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endif()
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endif()
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# If we have headers, look up libraries
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if(GSS_FLAVOUR)
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set(_gss_libdir_hints ${_gss_root_hints})
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if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.20)
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cmake_path(GET _gss_INCLUDE_DIRS PARENT_PATH _gss_calculated_potential_root)
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else()
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get_filename_component(_gss_calculated_potential_root "${_gss_INCLUDE_DIRS}" DIRECTORY)
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endif()
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list(APPEND _gss_libdir_hints ${_gss_calculated_potential_root})
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find_library(_gss_LIBRARIES NAMES ${_gss_libname} HINTS ${_gss_libdir_hints} PATH_SUFFIXES ${_gss_libdir_suffixes})
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endif()
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endif()
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if(NOT GSS_FLAVOUR)
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message(FATAL_ERROR "GNU or MIT GSS is required")
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endif()
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else()
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# _gss_MODULE_NAME set since CMake 3.16.
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# _pkg_check_modules_pkg_name is undocumented and used as a fallback for CMake <3.16 versions.
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if(_gss_MODULE_NAME STREQUAL _gnu_modname OR _pkg_check_modules_pkg_name STREQUAL _gnu_modname)
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set(GSS_FLAVOUR "GNU")
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set(GSS_PC_REQUIRES ${_gnu_modname})
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elseif(_gss_MODULE_NAME STREQUAL _mit_modname OR _pkg_check_modules_pkg_name STREQUAL _mit_modname)
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set(GSS_FLAVOUR "MIT")
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set(GSS_PC_REQUIRES ${_mit_modname})
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else()
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message(FATAL_ERROR "GNU or MIT GSS is required")
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endif()
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message(STATUS "Found GSS/${GSS_FLAVOUR} (via pkg-config): ${_gss_INCLUDE_DIRS} (found version \"${_gss_version}\")")
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endif()
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string(REPLACE ";" " " _gss_CFLAGS "${_gss_CFLAGS}")
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set(GSS_INCLUDE_DIRS ${_gss_INCLUDE_DIRS})
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set(GSS_LIBRARIES ${_gss_LIBRARIES})
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set(GSS_LIBRARY_DIRS ${_gss_LIBRARY_DIRS})
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set(GSS_CFLAGS ${_gss_CFLAGS})
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set(GSS_VERSION ${_gss_version})
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if(NOT GSS_VERSION)
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if(GSS_FLAVOUR STREQUAL "MIT")
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if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.24)
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cmake_host_system_information(RESULT _mit_version QUERY WINDOWS_REGISTRY
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"HKLM/SOFTWARE/MIT/Kerberos/SDK/CurrentVersion" VALUE "VersionString")
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else()
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get_filename_component(_mit_version
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"[HKEY_LOCAL_MACHINE\\SOFTWARE\\MIT\\Kerberos\\SDK\\CurrentVersion;VersionString]" NAME CACHE)
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endif()
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if(WIN32 AND _mit_version)
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set(GSS_VERSION "${_mit_version}")
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else()
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set(GSS_VERSION "MIT Unknown")
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endif()
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else() # GNU
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if(GSS_INCLUDE_DIRS AND EXISTS "${GSS_INCLUDE_DIRS}/gss.h")
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set(_version_regex "#[\t ]*define[\t ]+GSS_VERSION[\t ]+\"([^\"]*)\"")
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file(STRINGS "${GSS_INCLUDE_DIRS}/gss.h" _version_str REGEX "${_version_regex}")
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string(REGEX REPLACE "${_version_regex}" "\\1" _version_str "${_version_str}")
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set(GSS_VERSION "${_version_str}")
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unset(_version_regex)
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unset(_version_str)
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endif()
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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(GSS
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REQUIRED_VARS
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GSS_FLAVOUR
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GSS_LIBRARIES
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VERSION_VAR
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GSS_VERSION
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FAIL_MESSAGE
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"Could NOT find GSS, try to set the absolute path to GSS installation root directory in the environment variable GSS_ROOT_DIR"
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)
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mark_as_advanced(
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_gss_CFLAGS
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_gss_FOUND
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_gss_INCLUDE_DIRS
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_gss_LIBRARIES
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_gss_LIBRARY_DIRS
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_gss_MODULE_NAME
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_gss_PREFIX
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_gss_version
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)
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