# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying file
# Copyright.txt or https://cmake.org/licensing for details.

#
# This file is a "template" file used by various FindPython modules.
#

#
# Initial configuration
#

# IN_LIST operator
cmake_policy(SET CMP0057 NEW)

if(NOT DEFINED _PYTHON_PREFIX)
    message(FATAL_ERROR "FindPython: INTERNAL ERROR")
endif()
if(NOT DEFINED _${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR)
    message(FATAL_ERROR "FindPython: INTERNAL ERROR")
endif()
if(_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR EQUAL "3")
    # set(_${_PYTHON_PREFIX}_VERSIONS 3.9 3.8 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3.0)
    set(_${_PYTHON_PREFIX}_VERSIONS ${Python_ADDITIONAL_VERSIONS})
elseif(_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR EQUAL "2")
    # set(_${_PYTHON_PREFIX}_VERSIONS 2.7 2.6 2.5 2.4 2.3 2.2 2.1 2.0)
    set(_${_PYTHON_PREFIX}_VERSIONS)
else()
    message(FATAL_ERROR "FindPython: INTERNAL ERROR")
endif()

get_property(_${_PYTHON_PREFIX}_CMAKE_ROLE GLOBAL PROPERTY CMAKE_ROLE)

#
# helper commands
#
macro(_PYTHON_DISPLAY_FAILURE _PYTHON_MSG)
    if(${_PYTHON_PREFIX}_FIND_REQUIRED)
        message(FATAL_ERROR "${_PYTHON_MSG}")
    else()
        if(NOT ${_PYTHON_PREFIX}_FIND_QUIETLY)
            message(STATUS "${_PYTHON_MSG}")
        endif()
    endif()

    set(${_PYTHON_PREFIX}_FOUND FALSE)
    string(TOUPPER "${_PYTHON_PREFIX}" _${_PYTHON_PREFIX}_UPPER_PREFIX)
    set(${_PYTHON_UPPER_PREFIX}_FOUND FALSE)
    return()
endmacro()

function(_PYTHON_MARK_AS_INTERNAL)
    foreach(var IN LISTS ARGV)
        if(DEFINED CACHE{${var}})
            set_property(CACHE ${var} PROPERTY TYPE INTERNAL)
        endif()
    endforeach()
endfunction()

macro(_PYTHON_SELECT_LIBRARY_CONFIGURATIONS _PYTHON_BASENAME)
    if(NOT DEFINED ${_PYTHON_BASENAME}_LIBRARY_RELEASE)
        set(${_PYTHON_BASENAME}_LIBRARY_RELEASE
            "${_PYTHON_BASENAME}_LIBRARY_RELEASE-NOTFOUND")
    endif()
    if(NOT DEFINED ${_PYTHON_BASENAME}_LIBRARY_DEBUG)
        set(${_PYTHON_BASENAME}_LIBRARY_DEBUG
            "${_PYTHON_BASENAME}_LIBRARY_DEBUG-NOTFOUND")
    endif()

    get_property(_PYTHON_isMultiConfig GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
    if(${_PYTHON_BASENAME}_LIBRARY_DEBUG
       AND ${_PYTHON_BASENAME}_LIBRARY_RELEASE
       AND NOT ${_PYTHON_BASENAME}_LIBRARY_DEBUG STREQUAL
           ${_PYTHON_BASENAME}_LIBRARY_RELEASE
       AND (_PYTHON_isMultiConfig OR CMAKE_BUILD_TYPE))
        # if the generator is multi-config or if CMAKE_BUILD_TYPE is set for single-config
        # generators, set optimized and debug libraries
        set(${_PYTHON_BASENAME}_LIBRARIES "")
        foreach(_PYTHON_libname IN LISTS ${_PYTHON_BASENAME}_LIBRARY_RELEASE)
            list(APPEND ${_PYTHON_BASENAME}_LIBRARIES optimized "${_PYTHON_libname}")
        endforeach()
        foreach(_PYTHON_libname IN LISTS ${_PYTHON_BASENAME}_LIBRARY_DEBUG)
            list(APPEND ${_PYTHON_BASENAME}_LIBRARIES debug "${_PYTHON_libname}")
        endforeach()
    elseif(${_PYTHON_BASENAME}_LIBRARY_RELEASE)
        set(${_PYTHON_BASENAME}_LIBRARIES "${${_PYTHON_BASENAME}_LIBRARY_RELEASE}")
    elseif(${_PYTHON_BASENAME}_LIBRARY_DEBUG)
        set(${_PYTHON_BASENAME}_LIBRARIES "${${_PYTHON_BASENAME}_LIBRARY_DEBUG}")
    else()
        set(${_PYTHON_BASENAME}_LIBRARIES "${_PYTHON_BASENAME}_LIBRARY-NOTFOUND")
    endif()
endmacro()

macro(_PYTHON_FIND_FRAMEWORKS)
    if(CMAKE_HOST_APPLE OR APPLE)
        file(TO_CMAKE_PATH "$ENV{CMAKE_FRAMEWORK_PATH}" _pff_CMAKE_FRAMEWORK_PATH)
        set(_pff_frameworks
            ${CMAKE_FRAMEWORK_PATH} ${_pff_CMAKE_FRAMEWORK_PATH} ~/Library/Frameworks
            /usr/local/Frameworks ${CMAKE_SYSTEM_FRAMEWORK_PATH})
        list(REMOVE_DUPLICATES _pff_frameworks)
        foreach(_pff_implementation IN LISTS _${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS)
            unset(_${_PYTHON_PREFIX}_${_pff_implementation}_FRAMEWORKS)
            if(_pff_implementation STREQUAL "CPython")
                foreach(_pff_framework IN LISTS _pff_frameworks)
                    if(EXISTS
                       ${_pff_framework}/Python${_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR}.framework
                       )
                        list(
                            APPEND
                            _${_PYTHON_PREFIX}_${_pff_implementation}_FRAMEWORKS
                            ${_pff_framework}/Python${_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR}.framework
                            )
                    endif()
                    if(EXISTS ${_pff_framework}/Python.framework)
                        list(APPEND _${_PYTHON_PREFIX}_${_pff_implementation}_FRAMEWORKS
                             ${_pff_framework}/Python.framework)
                    endif()
                endforeach()
            elseif(_pff_implementation STREQUAL "IronPython")
                foreach(_pff_framework IN LISTS _pff_frameworks)
                    if(EXISTS ${_pff_framework}/IronPython.framework)
                        list(APPEND _${_PYTHON_PREFIX}_${_pff_implementation}_FRAMEWORKS
                             ${_pff_framework}/IronPython.framework)
                    endif()
                endforeach()
            endif()
        endforeach()
        unset(_pff_implementation)
        unset(_pff_frameworks)
        unset(_pff_framework)
    endif()
endmacro()

function(_PYTHON_GET_FRAMEWORKS _PYTHON_PGF_FRAMEWORK_PATHS)
    cmake_parse_arguments(PARSE_ARGV 1 _PGF "" "" "IMPLEMENTATIONS;VERSION")

    if(NOT _PGF_IMPLEMENTATIONS)
        set(_PGF_IMPLEMENTATIONS ${_${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS})
    endif()

    set(framework_paths)

    foreach(implementation IN LISTS _PGF_IMPLEMENTATIONS)
        if(implementation STREQUAL "CPython")
            foreach(version IN LISTS _PGF_VERSION)
                foreach(framework IN
                        LISTS _${_PYTHON_PREFIX}_${implementation}_FRAMEWORKS)
                    if(EXISTS "${framework}/Versions/${version}")
                        list(APPEND framework_paths "${framework}/Versions/${version}")
                    endif()
                endforeach()
            endforeach()
        elseif(implementation STREQUAL "IronPython")
            foreach(version IN LISTS _PGF_VERSION)
                foreach(framework IN
                        LISTS _${_PYTHON_PREFIX}_${implementation}_FRAMEWORKS)
                    # pick-up all available versions
                    file(
                        GLOB versions
                        LIST_DIRECTORIES true
                        RELATIVE "${framework}/Versions/"
                        "${framework}/Versions/${version}*")
                    list(SORT versions ORDER DESCENDING)
                    list(TRANSFORM versions PREPEND "${framework}/Versions/")
                    list(APPEND framework_paths ${versions})
                endforeach()
            endforeach()
        endif()
    endforeach()

    set(${_PYTHON_PGF_FRAMEWORK_PATHS}
        ${framework_paths}
        PARENT_SCOPE)
endfunction()

function(_PYTHON_GET_REGISTRIES _PYTHON_PGR_REGISTRY_PATHS)
    cmake_parse_arguments(PARSE_ARGV 1 _PGR "" "" "IMPLEMENTATIONS;VERSION")

    if(NOT _PGR_IMPLEMENTATIONS)
        set(_PGR_IMPLEMENTATIONS ${_${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS})
    endif()

    set(registries)

    foreach(implementation IN LISTS _PGR_IMPLEMENTATIONS)
        if(implementation STREQUAL "CPython")
            foreach(version IN LISTS _PGR_VERSION)
                string(REPLACE "." "" version_no_dots ${version})
                list(
                    APPEND
                    registries
                    [HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${version}-${_${_PYTHON_PREFIX}_ARCH}\\InstallPath]
                    [HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${version}-${_${_PYTHON_PREFIX}_ARCH2}\\InstallPath]
                    )
                if(version VERSION_GREATER_EQUAL "3.5")
                    get_filename_component(
                        arch
                        "[HKEY_CURRENT_USER\\Software\\Python\\PythonCore\\${version};SysArchitecture]"
                        NAME)
                    if(arch MATCHES
                       "(${_${_PYTHON_PREFIX}_ARCH}|${_${_PYTHON_PREFIX}_ARCH2})bit")
                        list(
                            APPEND
                            registries
                            [HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${version}\\InstallPath]
                            )
                    endif()
                else()
                    list(
                        APPEND
                        registries
                        [HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${version}\\InstallPath]
                        )
                endif()
                list(
                    APPEND
                    registries
                    [HKEY_CURRENT_USER\\SOFTWARE\\Python\\ContinuumAnalytics\\Anaconda${version_no_dots}-${_${_PYTHON_PREFIX}_ARCH}\\InstallPath]
                    [HKEY_CURRENT_USER\\SOFTWARE\\Python\\ContinuumAnalytics\\Anaconda${version_no_dots}-${_${_PYTHON_PREFIX}_ARCH2}\\InstallPath]
                    [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${version}-${_${_PYTHON_PREFIX}_ARCH}\\InstallPath]
                    [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${version}-${_${_PYTHON_PREFIX}_ARCH2}\\InstallPath]
                    [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${version}\\InstallPath]
                    [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\ContinuumAnalytics\\Anaconda${version_no_dots}-${_${_PYTHON_PREFIX}_ARCH}\\InstallPath]
                    [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\ContinuumAnalytics\\Anaconda${version_no_dots}-${_${_PYTHON_PREFIX}_ARCH2}\\InstallPath]
                    )
            endforeach()
        elseif(implementation STREQUAL "IronPython")
            foreach(version IN LISTS _PGR_VERSION)
                list(APPEND registries
                     [HKEY_LOCAL_MACHINE\\SOFTWARE\\IronPython\\${version}\\InstallPath])
            endforeach()
        endif()
    endforeach()

    set(${_PYTHON_PGR_REGISTRY_PATHS}
        "${registries}"
        PARENT_SCOPE)
endfunction()

function(_PYTHON_GET_ABIFLAGS _PGABIFLAGS)
    set(abiflags)
    list(GET _${_PYTHON_PREFIX}_FIND_ABI 0 pydebug)
    list(GET _${_PYTHON_PREFIX}_FIND_ABI 1 pymalloc)
    list(GET _${_PYTHON_PREFIX}_FIND_ABI 2 unicode)

    if(pymalloc STREQUAL "ANY" AND unicode STREQUAL "ANY")
        set(abiflags "mu" "m" "u" "")
    elseif(pymalloc STREQUAL "ANY" AND unicode STREQUAL "ON")
        set(abiflags "mu" "u")
    elseif(pymalloc STREQUAL "ANY" AND unicode STREQUAL "OFF")
        set(abiflags "m" "")
    elseif(pymalloc STREQUAL "ON" AND unicode STREQUAL "ANY")
        set(abiflags "mu" "m")
    elseif(pymalloc STREQUAL "ON" AND unicode STREQUAL "ON")
        set(abiflags "mu")
    elseif(pymalloc STREQUAL "ON" AND unicode STREQUAL "OFF")
        set(abiflags "m")
    elseif(pymalloc STREQUAL "ON" AND unicode STREQUAL "ANY")
        set(abiflags "u" "")
    elseif(pymalloc STREQUAL "OFF" AND unicode STREQUAL "ON")
        set(abiflags "u")
    endif()

    if(pydebug STREQUAL "ON")
        if(abiflags)
            list(TRANSFORM abiflags PREPEND "d")
        else()
            set(abiflags "d")
        endif()
    elseif(pydebug STREQUAL "ANY")
        if(abiflags)
            set(flags "${abiflags}")
            list(TRANSFORM flags PREPEND "d")
            list(APPEND abiflags "${flags}")
        else()
            set(abiflags "" "d")
        endif()
    endif()

    set(${_PGABIFLAGS}
        "${abiflags}"
        PARENT_SCOPE)
endfunction()

function(_PYTHON_GET_PATH_SUFFIXES _PYTHON_PGPS_PATH_SUFFIXES)
    cmake_parse_arguments(PARSE_ARGV 1 _PGPS "INTERPRETER;COMPILER;LIBRARY;INCLUDE" ""
                          "IMPLEMENTATIONS;VERSION")

    if(NOT _PGPS_IMPLEMENTATIONS)
        set(_PGPS_IMPLEMENTATIONS ${_${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS})
    endif()

    if(DEFINED _${_PYTHON_PREFIX}_ABIFLAGS)
        set(abi "${_${_PYTHON_PREFIX}_ABIFLAGS}")
    else()
        set(abi "mu" "m" "u" "")
    endif()

    set(path_suffixes)

    foreach(implementation IN LISTS _PGPS_IMPLEMENTATIONS)
        if(implementation STREQUAL "CPython")
            if(_PGPS_INTERPRETER)
                list(APPEND path_suffixes bin Scripts)
            else()
                foreach(version IN LISTS _PGPS_VERSION)
                    if(_PGPS_LIBRARY)
                        if(CMAKE_LIBRARY_ARCHITECTURE)
                            list(APPEND path_suffixes lib/${CMAKE_LIBRARY_ARCHITECTURE})
                        endif()
                        list(APPEND path_suffixes lib libs)

                        if(CMAKE_LIBRARY_ARCHITECTURE)
                            set(suffixes "${abi}")
                            if(suffixes)
                                list(
                                    TRANSFORM suffixes
                                    PREPEND
                                        "lib/python${_PGPS_VERSION}/config-${_PGPS_VERSION}"
                                    )
                                list(TRANSFORM suffixes
                                     APPEND "-${CMAKE_LIBRARY_ARCHITECTURE}")
                            else()
                                set(suffixes
                                    "lib/python${_PGPS_VERSION}/config-${_PGPS_VERSION}-${CMAKE_LIBRARY_ARCHITECTURE}"
                                    )
                            endif()
                            list(APPEND path_suffixes ${suffixes})
                        endif()
                        set(suffixes "${abi}")
                        if(suffixes)
                            list(
                                TRANSFORM suffixes
                                PREPEND
                                    "lib/python${_PGPS_VERSION}/config-${_PGPS_VERSION}")
                        else()
                            set(suffixes
                                "lib/python${_PGPS_VERSION}/config-${_PGPS_VERSION}")
                        endif()
                        list(APPEND path_suffixes ${suffixes})
                    elseif(_PGPS_INCLUDE)
                        set(suffixes "${abi}")
                        if(suffixes)
                            list(TRANSFORM suffixes
                                 PREPEND "include/python${_PGPS_VERSION}")
                        else()
                            set(suffixes "include/python${_PGPS_VERSION}")
                        endif()
                        list(APPEND path_suffixes ${suffixes} include)
                    endif()
                endforeach()
            endif()
        elseif(implementation STREQUAL "IronPython")
            if(_PGPS_INTERPRETER OR _PGPS_COMPILER)
                foreach(version IN LISTS _PGPS_VERSION)
                    list(APPEND path_suffixes "share/ironpython${version}")
                endforeach()
                list(APPEND path_suffixes ${_${_PYTHON_PREFIX}_IRON_PYTHON_PATH_SUFFIXES})
            endif()
        elseif(implementation STREQUAL "PyPy")
            if(_PGPS_INTERPRETER)
                list(APPEND path_suffixes
                     ${_${_PYTHON_PREFIX}_PYPY_EXECUTABLE_PATH_SUFFIXES})
            elseif(_PGPS_LIBRARY)
                list(APPEND path_suffixes
                     ${_${_PYTHON_PREFIX}_PYPY_LIBRARY_PATH_SUFFIXES})
            elseif(_PGPS_INCLUDE)
                list(APPEND path_suffixes
                     ${_${_PYTHON_PREFIX}_PYPY_INCLUDE_PATH_SUFFIXES})
            endif()
        endif()
    endforeach()
    list(REMOVE_DUPLICATES path_suffixes)

    set(${_PYTHON_PGPS_PATH_SUFFIXES}
        ${path_suffixes}
        PARENT_SCOPE)
endfunction()

function(_PYTHON_GET_NAMES _PYTHON_PGN_NAMES)
    cmake_parse_arguments(
        PARSE_ARGV 1 _PGN "POSIX;INTERPRETER;COMPILER;CONFIG;LIBRARY;WIN32;DEBUG" ""
        "IMPLEMENTATIONS;VERSION")

    if(NOT _PGN_IMPLEMENTATIONS)
        set(_PGN_IMPLEMENTATIONS ${_${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS})
    endif()

    set(names)

    foreach(implementation IN LISTS _PGN_IMPLEMENTATIONS)
        if(implementation STREQUAL "CPython")
            foreach(version IN LISTS _PGN_VERSION)
                if(_PGN_WIN32)
                    string(REPLACE "." "" version_no_dots ${version})

                    set(name python${version_no_dots})
                    if(_PGN_DEBUG)
                        string(APPEND name "_d")
                    endif()

                    list(APPEND names "${name}")
                endif()

                if(_PGN_POSIX)
                    if(DEFINED _${_PYTHON_PREFIX}_ABIFLAGS)
                        set(abi "${_${_PYTHON_PREFIX}_ABIFLAGS}")
                    else()
                        if(_PGN_INTERPRETER OR _PGN_CONFIG)
                            set(abi "")
                        else()
                            set(abi "mu" "m" "u" "")
                        endif()
                    endif()

                    if(abi)
                        if(_PGN_CONFIG AND DEFINED CMAKE_LIBRARY_ARCHITECTURE)
                            set(abinames "${abi}")
                            list(TRANSFORM abinames
                                 PREPEND "${CMAKE_LIBRARY_ARCHITECTURE}-python${version}")
                            list(TRANSFORM abinames APPEND "-config")
                            list(APPEND names ${abinames})
                        endif()
                        set(abinames "${abi}")
                        list(TRANSFORM abinames PREPEND "python${version}")
                        if(_PGN_CONFIG)
                            list(TRANSFORM abinames APPEND "-config")
                        endif()
                        list(APPEND names ${abinames})
                    else()
                        unset(abinames)
                        if(_PGN_CONFIG AND DEFINED CMAKE_LIBRARY_ARCHITECTURE)
                            set(abinames "${CMAKE_LIBRARY_ARCHITECTURE}-python${version}")
                        endif()
                        list(APPEND abinames "python${version}")
                        if(_PGN_CONFIG)
                            list(TRANSFORM abinames APPEND "-config")
                        endif()
                        list(APPEND names ${abinames})
                    endif()
                endif()
            endforeach()
            if(_PGN_INTERPRETER)
                list(APPEND names python${_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR}
                     python)
            endif()
        elseif(implementation STREQUAL "IronPython")
            if(_PGN_INTERPRETER)
                if(NOT CMAKE_SYSTEM_NAME STREQUAL "Linux")
                    # Do not use wrapper script on Linux because it is buggy: -c
                    # interpreter option cannot be used
                    foreach(version IN LISTS _PGN_VERSION)
                        list(APPEND names "ipy${version}")
                    endforeach()
                endif()
                list(APPEND names ${_${_PYTHON_PREFIX}_IRON_PYTHON_INTERPRETER_NAMES})
            elseif(_PGN_COMPILER)
                list(APPEND names ${_${_PYTHON_PREFIX}_IRON_PYTHON_COMPILER_NAMES})
            endif()
        elseif(implementation STREQUAL "PyPy")
            if(_PGN_INTERPRETER)
                list(APPEND names ${_${_PYTHON_PREFIX}_PYPY_NAMES})
            elseif(_PGN_LIBRARY)
                if(_PGN_WIN32)
                    foreach(version IN LISTS _PGN_VERSION)
                        string(REPLACE "." "" version_no_dots ${version})

                        set(name "python${version_no_dots}")
                        if(_PGN_DEBUG)
                            string(APPEND name "_d")
                        endif()
                        list(APPEND names "${name}")
                    endforeach()
                endif()
                list(APPEND names ${_${_PYTHON_PREFIX}_PYPY_LIB_NAMES})
            endif()
        endif()
    endforeach()

    set(${_PYTHON_PGN_NAMES}
        ${names}
        PARENT_SCOPE)
endfunction()

function(_PYTHON_GET_CONFIG_VAR _PYTHON_PGCV_VALUE NAME)
    unset(${_PYTHON_PGCV_VALUE} PARENT_SCOPE)

    if(NOT NAME MATCHES "^(PREFIX|ABIFLAGS|CONFIGDIR|INCLUDES|LIBS|SOABI)$")
        return()
    endif()

    if(_${_PYTHON_PREFIX}_CONFIG)
        if(NAME STREQUAL "SOABI")
            set(config_flag "--extension-suffix")
        else()
            set(config_flag "--${NAME}")
        endif()
        string(TOLOWER "${config_flag}" config_flag)
        execute_process(
            COMMAND "${_${_PYTHON_PREFIX}_CONFIG}" ${config_flag}
            RESULT_VARIABLE _result
            OUTPUT_VARIABLE _values
            ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
        if(_result)
            unset(_values)
        else()
            if(NAME STREQUAL "INCLUDES")
                # do some clean-up
                string(REGEX MATCHALL "(-I|-iwithsysroot)[ ]*[^ ]+" _values "${_values}")
                string(REGEX REPLACE "(-I|-iwithsysroot)[ ]*" "" _values "${_values}")
                list(REMOVE_DUPLICATES _values)
            elseif(NAME STREQUAL "SOABI")
                # clean-up: remove prefix character and suffix
                string(REGEX
                       REPLACE "^[.-](.+)(${CMAKE_SHARED_LIBRARY_SUFFIX}|\\.(so|pyd))$"
                               "\\1" _values "${_values}")
            endif()
        endif()
    endif()

    if(_${_PYTHON_PREFIX}_EXECUTABLE AND NOT CMAKE_CROSSCOMPILING)
        if(NAME STREQUAL "PREFIX")
            execute_process(
                COMMAND
                    ${_${_PYTHON_PREFIX}_INTERPRETER_LAUNCHER}
                    "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                    "import sys\ntry:\n   from distutils import sysconfig\n   sys.stdout.write(';'.join([sysconfig.PREFIX,sysconfig.EXEC_PREFIX,sysconfig.BASE_EXEC_PREFIX]))\nexcept Exception:\n   import sysconfig\n   sys.stdout.write(';'.join([sysconfig.get_config_var('base') or '', sysconfig.get_config_var('installed_base') or '']))"
                RESULT_VARIABLE _result
                OUTPUT_VARIABLE _values
                ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
            if(_result)
                unset(_values)
            else()
                list(REMOVE_DUPLICATES _values)
            endif()
        elseif(NAME STREQUAL "INCLUDES")
            if(WIN32)
                set(_scheme "nt")
            else()
                set(_scheme "posix_prefix")
            endif()
            execute_process(
                COMMAND
                    ${_${_PYTHON_PREFIX}_INTERPRETER_LAUNCHER}
                    "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                    "import sys\ntry:\n   from distutils import sysconfig\n   sys.stdout.write(';'.join([sysconfig.get_python_inc(plat_specific=True),sysconfig.get_python_inc(plat_specific=False)]))\nexcept Exception:\n   import sysconfig\n   sys.stdout.write(';'.join([sysconfig.get_path('platinclude'),sysconfig.get_path('platinclude','${_scheme}'),sysconfig.get_path('include'),sysconfig.get_path('include','${_scheme}')]))"
                RESULT_VARIABLE _result
                OUTPUT_VARIABLE _values
                ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
            if(_result)
                unset(_values)
            else()
                list(REMOVE_DUPLICATES _values)
            endif()
        elseif(NAME STREQUAL "SOABI")
            execute_process(
                COMMAND
                    ${_${_PYTHON_PREFIX}_INTERPRETER_LAUNCHER}
                    "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                    "import sys\ntry:\n   from distutils import sysconfig\n   sys.stdout.write(';'.join([sysconfig.get_config_var('SOABI') or '',sysconfig.get_config_var('EXT_SUFFIX') or '',sysconfig.get_config_var('SO') or '']))\nexcept Exception:\n   import sysconfig;sys.stdout.write(';'.join([sysconfig.get_config_var('SOABI') or '',sysconfig.get_config_var('EXT_SUFFIX') or '',sysconfig.get_config_var('SO') or '']))"
                RESULT_VARIABLE _result
                OUTPUT_VARIABLE _soabi
                ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
            if(_result)
                unset(_values)
            else()
                foreach(_item IN LISTS _soabi)
                    if(_item)
                        set(_values "${_item}")
                        break()
                    endif()
                endforeach()
                if(_values)
                    # clean-up: remove prefix character and suffix
                    string(
                        REGEX
                        REPLACE "^[.-](.+)(${CMAKE_SHARED_LIBRARY_SUFFIX}|\\.(so|pyd))$"
                                "\\1" _values "${_values}")
                endif()
            endif()
        else()
            set(config_flag "${NAME}")
            if(NAME STREQUAL "CONFIGDIR")
                set(config_flag "LIBPL")
            endif()
            execute_process(
                COMMAND
                    ${_${_PYTHON_PREFIX}_INTERPRETER_LAUNCHER}
                    "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                    "import sys\ntry:\n   from distutils import sysconfig\n   sys.stdout.write(sysconfig.get_config_var('${config_flag}'))\nexcept Exception:\n   import sysconfig\n   sys.stdout.write(sysconfig.get_config_var('${config_flag}'))"
                RESULT_VARIABLE _result
                OUTPUT_VARIABLE _values
                ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
            if(_result)
                unset(_values)
            endif()
        endif()
    endif()

    if(NAME STREQUAL "ABIFLAGS" OR NAME STREQUAL "SOABI")
        set(${_PYTHON_PGCV_VALUE}
            "${_values}"
            PARENT_SCOPE)
        return()
    endif()

    if(NOT _values OR _values STREQUAL "None")
        return()
    endif()

    if(NAME STREQUAL "LIBS")
        # do some clean-up
        string(REGEX MATCHALL "-(l|framework)[ ]*[^ ]+" _values "${_values}")
        # remove elements relative to python library itself
        list(FILTER _values EXCLUDE REGEX "-lpython")
        list(REMOVE_DUPLICATES _values)
    endif()

    if(WIN32 AND NAME MATCHES "^(PREFIX|CONFIGDIR|INCLUDES)$")
        file(TO_CMAKE_PATH "${_values}" _values)
    endif()

    set(${_PYTHON_PGCV_VALUE}
        "${_values}"
        PARENT_SCOPE)
endfunction()

function(_PYTHON_GET_VERSION)
    cmake_parse_arguments(PARSE_ARGV 0 _PGV "LIBRARY;INCLUDE" "PREFIX" "")

    unset(${_PGV_PREFIX}VERSION PARENT_SCOPE)
    unset(${_PGV_PREFIX}VERSION_MAJOR PARENT_SCOPE)
    unset(${_PGV_PREFIX}VERSION_MINOR PARENT_SCOPE)
    unset(${_PGV_PREFIX}VERSION_PATCH PARENT_SCOPE)
    unset(${_PGV_PREFIX}ABI PARENT_SCOPE)

    if(_PGV_LIBRARY)
        # retrieve version and abi from library name
        if(_${_PYTHON_PREFIX}_LIBRARY_RELEASE)
            get_filename_component(library_name "${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}"
                                   NAME)
            # extract version from library name
            if(library_name MATCHES "python([23])([0-9]+)")
                set(${_PGV_PREFIX}VERSION_MAJOR
                    "${CMAKE_MATCH_1}"
                    PARENT_SCOPE)
                set(${_PGV_PREFIX}VERSION_MINOR
                    "${CMAKE_MATCH_2}"
                    PARENT_SCOPE)
                set(${_PGV_PREFIX}VERSION
                    "${CMAKE_MATCH_1}.${CMAKE_MATCH_2}"
                    PARENT_SCOPE)
                set(${_PGV_PREFIX}ABI
                    ""
                    PARENT_SCOPE)
            elseif(library_name MATCHES "python([23])\\.([0-9]+)([dmu]*)")
                set(${_PGV_PREFIX}VERSION_MAJOR
                    "${CMAKE_MATCH_1}"
                    PARENT_SCOPE)
                set(${_PGV_PREFIX}VERSION_MINOR
                    "${CMAKE_MATCH_2}"
                    PARENT_SCOPE)
                set(${_PGV_PREFIX}VERSION
                    "${CMAKE_MATCH_1}.${CMAKE_MATCH_2}"
                    PARENT_SCOPE)
                set(${_PGV_PREFIX}ABI
                    "${CMAKE_MATCH_3}"
                    PARENT_SCOPE)
            elseif(library_name MATCHES "pypy(3)?-c")
                set(version "${CMAKE_MATCH_1}")
                if(version EQUAL "3")
                    set(${_PGV_PREFIX}VERSION_MAJOR
                        "3"
                        PARENT_SCOPE)
                    set(${_PGV_PREFIX}VERSION
                        "3"
                        PARENT_SCOPE)
                else()
                    set(${_PGV_PREFIX}VERSION_MAJOR
                        "2"
                        PARENT_SCOPE)
                    set(${_PGV_PREFIX}VERSION
                        "2"
                        PARENT_SCOPE)
                endif()
                set(${_PGV_PREFIX}ABI
                    ""
                    PARENT_SCOPE)
            endif()
        endif()
    else()
        if(_${_PYTHON_PREFIX}_INCLUDE_DIR)
            # retrieve version from header file
            file(STRINGS "${_${_PYTHON_PREFIX}_INCLUDE_DIR}/patchlevel.h" version
                 REGEX "^#define[ \t]+PY_VERSION[ \t]+\"[^\"]+\"")
            string(REGEX REPLACE "^#define[ \t]+PY_VERSION[ \t]+\"([^\"]+)\".*" "\\1"
                                 version "${version}")
            string(REGEX MATCHALL "[0-9]+" versions "${version}")
            list(GET versions 0 version_major)
            list(GET versions 1 version_minor)
            list(GET versions 2 version_patch)

            set(${_PGV_PREFIX}VERSION
                "${version_major}.${version_minor}.${version_patch}"
                PARENT_SCOPE)
            set(${_PGV_PREFIX}VERSION_MAJOR
                ${version_major}
                PARENT_SCOPE)
            set(${_PGV_PREFIX}VERSION_MINOR
                ${version_minor}
                PARENT_SCOPE)
            set(${_PGV_PREFIX}VERSION_PATCH
                ${version_patch}
                PARENT_SCOPE)

            # compute ABI flags
            if(version_major VERSION_GREATER "2")
                file(STRINGS "${_${_PYTHON_PREFIX}_INCLUDE_DIR}/pyconfig.h" config
                     REGEX "(Py_DEBUG|WITH_PYMALLOC|Py_UNICODE_SIZE|MS_WIN32)")
                set(abi)
                if(config MATCHES "#[ ]*define[ ]+MS_WIN32")
                    # ABI not used on Windows
                    set(abi "")
                else()
                    if(config MATCHES "#[ ]*define[ ]+Py_DEBUG[ ]+1")
                        string(APPEND abi "d")
                    endif()
                    if(config MATCHES "#[ ]*define[ ]+WITH_PYMALLOC[ ]+1")
                        string(APPEND abi "m")
                    endif()
                    if(config MATCHES "#[ ]*define[ ]+Py_UNICODE_SIZE[ ]+4")
                        string(APPEND abi "u")
                    endif()
                    set(${_PGV_PREFIX}ABI
                        "${abi}"
                        PARENT_SCOPE)
                endif()
            else()
                # ABI not supported
                set(${_PGV_PREFIX}ABI
                    ""
                    PARENT_SCOPE)
            endif()
        endif()
    endif()
endfunction()

function(_PYTHON_GET_LAUNCHER _PYTHON_PGL_NAME)
    cmake_parse_arguments(PARSE_ARGV 1 _PGL "INTERPRETER;COMPILER" "" "")

    unset({_PYTHON_PGL_NAME} PARENT_SCOPE)

    if((_PGL_INTERPRETER AND NOT _${_PYTHON_PREFIX}_EXECUTABLE)
       OR (_PGL_COMPILER AND NOT _${_PYTHON_PREFIX}_COMPILER))
        return()
    endif()

    if("IronPython" IN_LIST _${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS
       AND NOT SYSTEM_NAME MATCHES "Windows|Linux")
        if(_PGL_INTERPRETER)
            get_filename_component(NAME "${_${_PYTHON_PREFIX}_EXECUTABLE}" NAME)
            get_filename_component(EXT "${_${_PYTHON_PREFIX}_EXECUTABLE}" LAST_EXT)
            if(name IN_LIST _${_PYTHON_PREFIX}_IRON_PYTHON_INTERPRETER_NAMES
               AND ext STREQUAL ".exe")
                set(${_PYTHON_PGL_NAME}
                    "${${_PYTHON_PREFIX}_DOTNET_LAUNCHER}"
                    PARENT_SCOPE)
            endif()
        else()
            get_filename_component(NAME "${_${_PYTHON_PREFIX}_COMPILER}" NAME)
            get_filename_component(EXT "${_${_PYTHON_PREFIX}_COMPILER}" LAST_EXT)
            if(name IN_LIST _${_PYTHON_PREFIX}_IRON_PYTHON_COMPILER_NAMES
               AND ext STREQUAL ".exe")
                set(${_PYTHON_PGL_NAME}
                    "${${_PYTHON_PREFIX}_DOTNET_LAUNCHER}"
                    PARENT_SCOPE)
            endif()
        endif()
    endif()
endfunction()

function(_PYTHON_VALIDATE_INTERPRETER)
    if(NOT _${_PYTHON_PREFIX}_EXECUTABLE)
        return()
    endif()

    cmake_parse_arguments(PARSE_ARGV 0 _PVI "EXACT;CHECK_EXISTS" "" "")
    if(_PVI_UNPARSED_ARGUMENTS)
        set(expected_version "${_PVI_UNPARSED_ARGUMENTS}")
    else()
        unset(expected_version)
    endif()

    if(_PVI_CHECK_EXISTS AND NOT EXISTS "${_${_PYTHON_PREFIX}_EXECUTABLE}")
        # interpreter does not exist anymore
        set(_${_PYTHON_PREFIX}_Interpreter_REASON_FAILURE
            "Cannot find the interpreter \"${_${_PYTHON_PREFIX}_EXECUTABLE}\""
            PARENT_SCOPE)
        set_property(CACHE _${_PYTHON_PREFIX}_EXECUTABLE
                     PROPERTY VALUE "${_PYTHON_PREFIX}_EXECUTABLE-NOTFOUND")
        return()
    endif()

    _python_get_launcher(launcher INTERPRETER)

    # validate ABI compatibility
    if(DEFINED _${_PYTHON_PREFIX}_FIND_ABI)
        execute_process(
            COMMAND ${launcher} "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                    "import sys; sys.stdout.write(sys.abiflags)"
            RESULT_VARIABLE result
            OUTPUT_VARIABLE abi
            ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
        if(result)
            # assume ABI is not supported
            set(abi "")
        endif()
        if(NOT abi IN_LIST _${_PYTHON_PREFIX}_ABIFLAGS)
            # incompatible ABI
            set(_${_PYTHON_PREFIX}_Interpreter_REASON_FAILURE
                "Wrong ABI for the interpreter \"${_${_PYTHON_PREFIX}_EXECUTABLE}\""
                PARENT_SCOPE)
            set_property(CACHE _${_PYTHON_PREFIX}_EXECUTABLE
                         PROPERTY VALUE "${_PYTHON_PREFIX}_EXECUTABLE-NOTFOUND")
            return()
        endif()
    endif()

    get_filename_component(python_name "${_${_PYTHON_PREFIX}_EXECUTABLE}" NAME)

    if(expected_version)
        if(NOT python_name STREQUAL
           "python${expected_version}${abi}${CMAKE_EXECUTABLE_SUFFIX}")
            # compute number of components for version
            string(REGEX REPLACE "[^.]" "" dots "${expected_version}")
            # add one dot because there is one dot less than there are components
            string(LENGTH "${dots}." count)
            if(count GREATER 3)
                set(count 3)
            endif()

            # executable found must have a specific version
            execute_process(
                COMMAND
                    ${launcher} "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                    "import sys; sys.stdout.write('.'.join([str(x) for x in sys.version_info[:${count}]]))"
                RESULT_VARIABLE result
                OUTPUT_VARIABLE version
                ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
            if(result)
                # interpreter is not usable
                set(_${_PYTHON_PREFIX}_Interpreter_REASON_FAILURE
                    "Cannot use the interpreter \"${_${_PYTHON_PREFIX}_EXECUTABLE}\""
                    PARENT_SCOPE)
                set_property(CACHE _${_PYTHON_PREFIX}_EXECUTABLE
                             PROPERTY VALUE "${_PYTHON_PREFIX}_EXECUTABLE-NOTFOUND")
            else()
                if(_PVI_EXACT AND NOT version VERSION_EQUAL expected_version)
                    # interpreter has wrong version
                    set(_${_PYTHON_PREFIX}_Interpreter_REASON_FAILURE
                        "Wrong version for the interpreter \"${_${_PYTHON_PREFIX}_EXECUTABLE}\""
                        PARENT_SCOPE)
                    set_property(CACHE _${_PYTHON_PREFIX}_EXECUTABLE
                                 PROPERTY VALUE "${_PYTHON_PREFIX}_EXECUTABLE-NOTFOUND")
                else()
                    # check that version is OK
                    string(REGEX REPLACE "^([0-9]+)\\.?.*$" "\\1" major_version
                                         "${version}")
                    string(REGEX REPLACE "^([0-9]+)\\.?.*$" "\\1" expected_major_version
                                         "${expected_version}")
                    if(NOT major_version VERSION_EQUAL expected_major_version
                       OR NOT version VERSION_GREATER_EQUAL expected_version)
                        set(_${_PYTHON_PREFIX}_Interpreter_REASON_FAILURE
                            "Wrong version for the interpreter \"${_${_PYTHON_PREFIX}_EXECUTABLE}\""
                            PARENT_SCOPE)
                        set_property(
                            CACHE _${_PYTHON_PREFIX}_EXECUTABLE
                            PROPERTY VALUE "${_PYTHON_PREFIX}_EXECUTABLE-NOTFOUND")
                    endif()
                endif()
            endif()
            if(NOT _${_PYTHON_PREFIX}_EXECUTABLE)
                return()
            endif()
        endif()
    else()
        if(NOT python_name STREQUAL
           "python${_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR}${CMAKE_EXECUTABLE_SUFFIX}")
            # executable found do not have version in name ensure major version is OK
            execute_process(
                COMMAND ${launcher} "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                        "import sys; sys.stdout.write(str(sys.version_info[0]))"
                RESULT_VARIABLE result
                OUTPUT_VARIABLE version
                ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
            if(result OR NOT version EQUAL _${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR)
                # interpreter not usable or has wrong major version
                if(result)
                    set(_${_PYTHON_PREFIX}_Interpreter_REASON_FAILURE
                        "Cannot use the interpreter \"${_${_PYTHON_PREFIX}_EXECUTABLE}\""
                        PARENT_SCOPE)
                else()
                    set(_${_PYTHON_PREFIX}_Interpreter_REASON_FAILURE
                        "Wrong major version for the interpreter \"${_${_PYTHON_PREFIX}_EXECUTABLE}\""
                        PARENT_SCOPE)
                endif()
                set_property(CACHE _${_PYTHON_PREFIX}_EXECUTABLE
                             PROPERTY VALUE "${_PYTHON_PREFIX}_EXECUTABLE-NOTFOUND")
                return()
            endif()
        endif()
    endif()

    if(CMAKE_SIZEOF_VOID_P
       AND ("Development.Module" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS
            OR "Development.Embed" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS)
       AND NOT CMAKE_CROSSCOMPILING)
        # In this case, interpreter must have same architecture as environment
        execute_process(
            COMMAND ${launcher} "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                    "import sys, struct; sys.stdout.write(str(struct.calcsize(\"P\")))"
            RESULT_VARIABLE result
            OUTPUT_VARIABLE size
            ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
        if(result OR NOT size EQUAL CMAKE_SIZEOF_VOID_P)
            # interpreter not usable or has wrong architecture
            if(result)
                set(_${_PYTHON_PREFIX}_Interpreter_REASON_FAILURE
                    "Cannot use the interpreter \"${_${_PYTHON_PREFIX}_EXECUTABLE}\""
                    PARENT_SCOPE)
            else()
                set(_${_PYTHON_PREFIX}_Interpreter_REASON_FAILURE
                    "Wrong architecture for the interpreter \"${_${_PYTHON_PREFIX}_EXECUTABLE}\""
                    PARENT_SCOPE)
            endif()
            set_property(CACHE _${_PYTHON_PREFIX}_EXECUTABLE
                         PROPERTY VALUE "${_PYTHON_PREFIX}_EXECUTABLE-NOTFOUND")
            return()
        endif()
    endif()
endfunction()

function(_PYTHON_VALIDATE_COMPILER)
    if(NOT _${_PYTHON_PREFIX}_COMPILER)
        return()
    endif()

    cmake_parse_arguments(PARSE_ARGV 0 _PVC "EXACT;CHECK_EXISTS" "" "")
    if(_PVC_UNPARSED_ARGUMENTS)
        set(major_version FALSE)
        set(expected_version "${_PVC_UNPARSED_ARGUMENTS}")
    else()
        set(major_version TRUE)
        set(expected_version "${_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR}")
        set(_PVC_EXACT TRUE)
    endif()

    if(_PVC_CHECK_EXISTS AND NOT EXISTS "${_${_PYTHON_PREFIX}_COMPILER}")
        # Compiler does not exist anymore
        set(_${_PYTHON_PREFIX}_Compiler_REASON_FAILURE
            "Cannot find the compiler \"${_${_PYTHON_PREFIX}_COMPILER}\""
            PARENT_SCOPE)
        set_property(CACHE _${_PYTHON_PREFIX}_COMPILER
                     PROPERTY VALUE "${_PYTHON_PREFIX}_COMPILER-NOTFOUND")
        return()
    endif()

    _python_get_launcher(launcher COMPILER)

    # retrieve python environment version from compiler
    set(working_dir
        "${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/PythonCompilerVersion.dir")
    if(major_version)
        # check only major version
        file(WRITE "${working_dir}/version.py"
             "import sys; sys.stdout.write(str(sys.version_info[0]))")
    else()
        # compute number of components for version
        string(REGEX REPLACE "[^.]" "" dots "${expected_version}")
        # add one dot because there is one dot less than there are components
        string(LENGTH "${dots}." count)
        if(count GREATER 3)
            set(count 3)
        endif()
        file(
            WRITE "${working_dir}/version.py"
            "import sys; sys.stdout.write('.'.join([str(x) for x in sys.version_info[:${count}]]))\n"
            )
    endif()
    execute_process(
        COMMAND
            ${launcher} "${_${_PYTHON_PREFIX}_COMPILER}"
            ${_${_PYTHON_PREFIX}_IRON_PYTHON_COMPILER_ARCH_FLAGS} /target:exe /embed
            "${working_dir}/version.py"
        WORKING_DIRECTORY "${working_dir}"
        OUTPUT_QUIET ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
    get_filename_component(ir_dir "${_${_PYTHON_PREFIX}_COMPILER}" DIRECTORY)
    execute_process(
        COMMAND "${CMAKE_COMMAND}" -E env "MONO_PATH=${ir_dir}"
                ${${_PYTHON_PREFIX}_DOTNET_LAUNCHER} "${working_dir}/version.exe"
        WORKING_DIRECTORY "${working_dir}"
        RESULT_VARIABLE result
        OUTPUT_VARIABLE version
        ERROR_QUIET)
    file(REMOVE_RECURSE "${working_dir}")
    if(result)
        # compiler is not usable
        set(_${_PYTHON_PREFIX}_Compiler_REASON_FAILURE
            "Cannot use the compiler \"${_${_PYTHON_PREFIX}_COMPILER}\""
            PARENT_SCOPE)
        set_property(CACHE _${_PYTHON_PREFIX}_COMPILER
                     PROPERTY VALUE "${_PYTHON_PREFIX}_COMPILER-NOTFOUND")
    elseif((_PVC_EXACT AND NOT version VERSION_EQUAL expected_version)
           OR NOT version VERSION_GREATER_EQUAL expected_version)
        # Compiler has wrong version
        set(_${_PYTHON_PREFIX}_Compiler_REASON_FAILURE
            "Wrong version for the compiler \"${_${_PYTHON_PREFIX}_COMPILER}\""
            PARENT_SCOPE)
        set_property(CACHE _${_PYTHON_PREFIX}_COMPILER
                     PROPERTY VALUE "${_PYTHON_PREFIX}_COMPILER-NOTFOUND")
    endif()
endfunction()

function(_PYTHON_VALIDATE_LIBRARY)
    if(NOT _${_PYTHON_PREFIX}_LIBRARY_RELEASE)
        unset(_${_PYTHON_PREFIX}_LIBRARY_DEBUG)
        return()
    endif()

    cmake_parse_arguments(PARSE_ARGV 0 _PVL "EXACT;CHECK_EXISTS" "" "")
    if(_PVL_UNPARSED_ARGUMENTS)
        set(expected_version ${_PVL_UNPARSED_ARGUMENTS})
    else()
        unset(expected_version)
    endif()

    if(_PVL_CHECK_EXISTS AND NOT EXISTS "${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}")
        # library does not exist anymore
        set(_${_PYTHON_PREFIX}_Development_REASON_FAILURE
            "Cannot find the library \"${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}\""
            PARENT_SCOPE)
        set_property(CACHE _${_PYTHON_PREFIX}_LIBRARY_RELEASE
                     PROPERTY VALUE "${_PYTHON_PREFIX}_LIBRARY_RELEASE-NOTFOUND")
        if(WIN32)
            set_property(CACHE _${_PYTHON_PREFIX}_LIBRARY_DEBUG
                         PROPERTY VALUE "${_PYTHON_PREFIX}_LIBRARY_DEBUG-NOTFOUND")
        endif()
        set_property(CACHE _${_PYTHON_PREFIX}_INCLUDE_DIR
                     PROPERTY VALUE "${_PYTHON_PREFIX}_INCLUDE_DIR-NOTFOUND")
        return()
    endif()

    # retrieve version and abi from library name
    _python_get_version(LIBRARY PREFIX lib_)

    if(DEFINED _${_PYTHON_PREFIX}_FIND_ABI AND NOT lib_ABI IN_LIST
                                               _${_PYTHON_PREFIX}_ABIFLAGS)
        # incompatible ABI
        set(_${_PYTHON_PREFIX}_Development_REASON_FAILURE
            "Wrong ABI for the library \"${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}\""
            PARENT_SCOPE)
        set_property(CACHE _${_PYTHON_PREFIX}_LIBRARY_RELEASE
                     PROPERTY VALUE "${_PYTHON_PREFIX}_LIBRARY_RELEASE-NOTFOUND")
    else()
        if(expected_version)
            # library have only major.minor information
            string(REGEX MATCH "[0-9](\\.[0-9]+)?" version "${expected_version}")
            if((_PVL_EXACT AND NOT lib_VERSION VERSION_EQUAL version)
               OR (lib_VERSION VERSION_LESS version))
                # library has wrong version
                set(_${_PYTHON_PREFIX}_Development_REASON_FAILURE
                    "Wrong version for the library \"${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}\""
                    PARENT_SCOPE)
                set_property(CACHE _${_PYTHON_PREFIX}_LIBRARY_RELEASE
                             PROPERTY VALUE "${_PYTHON_PREFIX}_LIBRARY_RELEASE-NOTFOUND")
            endif()
        else()
            if(NOT lib_VERSION_MAJOR VERSION_EQUAL
               _${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR)
                # library has wrong major version
                set(_${_PYTHON_PREFIX}_Development_REASON_FAILURE
                    "Wrong major version for the library \"${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}\""
                    PARENT_SCOPE)
                set_property(CACHE _${_PYTHON_PREFIX}_LIBRARY_RELEASE
                             PROPERTY VALUE "${_PYTHON_PREFIX}_LIBRARY_RELEASE-NOTFOUND")
            endif()
        endif()
    endif()

    if(NOT _${_PYTHON_PREFIX}_LIBRARY_RELEASE)
        if(WIN32)
            set_property(CACHE _${_PYTHON_PREFIX}_LIBRARY_DEBUG
                         PROPERTY VALUE "${_PYTHON_PREFIX}_LIBRARY_DEBUG-NOTFOUND")
        endif()
        unset(_${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE CACHE)
        unset(_${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DEBUG CACHE)
        set_property(CACHE _${_PYTHON_PREFIX}_INCLUDE_DIR
                     PROPERTY VALUE "${_PYTHON_PREFIX}_INCLUDE_DIR-NOTFOUND")
    endif()
endfunction()

function(_PYTHON_VALIDATE_INCLUDE_DIR)
    if(NOT _${_PYTHON_PREFIX}_INCLUDE_DIR)
        return()
    endif()

    cmake_parse_arguments(PARSE_ARGV 0 _PVID "EXACT;CHECK_EXISTS" "" "")
    if(_PVID_UNPARSED_ARGUMENTS)
        set(expected_version ${_PVID_UNPARSED_ARGUMENTS})
    else()
        unset(expected_version)
    endif()

    if(_PVID_CHECK_EXISTS AND NOT EXISTS "${_${_PYTHON_PREFIX}_INCLUDE_DIR}")
        # include file does not exist anymore
        set(_${_PYTHON_PREFIX}_Development_REASON_FAILURE
            "Cannot find the directory \"${_${_PYTHON_PREFIX}_INCLUDE_DIR}\""
            PARENT_SCOPE)
        set_property(CACHE _${_PYTHON_PREFIX}_INCLUDE_DIR
                     PROPERTY VALUE "${_PYTHON_PREFIX}_INCLUDE_DIR-NOTFOUND")
        return()
    endif()

    # retrieve version from header file
    _python_get_version(INCLUDE PREFIX inc_)

    if(DEFINED _${_PYTHON_PREFIX}_FIND_ABI AND NOT inc_ABI IN_LIST
                                               _${_PYTHON_PREFIX}_ABIFLAGS)
        # incompatible ABI
        set(_${_PYTHON_PREFIX}_Development_REASON_FAILURE
            "Wrong ABI for the directory \"${_${_PYTHON_PREFIX}_INCLUDE_DIR}\""
            PARENT_SCOPE)
        set_property(CACHE _${_PYTHON_PREFIX}_INCLUDE_DIR
                     PROPERTY VALUE "${_PYTHON_PREFIX}_INCLUDE_DIR-NOTFOUND")
    else()
        if(expected_version)
            if((_PVID_EXACT AND NOT inc_VERSION VERSION_EQUAL expected_version)
               OR (inc_VERSION VERSION_LESS expected_version))
                # include dir has wrong version
                set(_${_PYTHON_PREFIX}_Development_REASON_FAILURE
                    "Wrong version for the directory \"${_${_PYTHON_PREFIX}_INCLUDE_DIR}\""
                    PARENT_SCOPE)
                set_property(CACHE _${_PYTHON_PREFIX}_INCLUDE_DIR
                             PROPERTY VALUE "${_PYTHON_PREFIX}_INCLUDE_DIR-NOTFOUND")
            endif()
        else()
            if(NOT inc_VERSION_MAJOR VERSION_EQUAL
               _${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR)
                # include dir has wrong major version
                set(_${_PYTHON_PREFIX}_Development_REASON_FAILURE
                    "Wrong major version for the directory \"${_${_PYTHON_PREFIX}_INCLUDE_DIR}\""
                    PARENT_SCOPE)
                set_property(CACHE _${_PYTHON_PREFIX}_INCLUDE_DIR
                             PROPERTY VALUE "${_PYTHON_PREFIX}_INCLUDE_DIR-NOTFOUND")
            endif()
        endif()
    endif()
endfunction()

function(_PYTHON_FIND_RUNTIME_LIBRARY _PYTHON_LIB)
    string(REPLACE "_RUNTIME" "" _PYTHON_LIB "${_PYTHON_LIB}")
    # look at runtime part on systems supporting it
    if(CMAKE_SYSTEM_NAME STREQUAL "Windows"
       OR (CMAKE_SYSTEM_NAME MATCHES "MSYS|CYGWIN" AND ${_PYTHON_LIB} MATCHES
                                                       "${CMAKE_IMPORT_LIBRARY_SUFFIX}$"))
        set(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_SHARED_LIBRARY_SUFFIX})
        # MSYS has a special syntax for runtime libraries
        if(CMAKE_SYSTEM_NAME MATCHES "MSYS")
            list(APPEND CMAKE_FIND_LIBRARY_PREFIXES "msys-")
        endif()
        find_library(${ARGV})
    endif()
endfunction()

function(_PYTHON_SET_LIBRARY_DIRS _PYTHON_SLD_RESULT)
    unset(_PYTHON_DIRS)
    set(_PYTHON_LIBS ${ARGN})
    foreach(_PYTHON_LIB IN LISTS _PYTHON_LIBS)
        if(${_PYTHON_LIB})
            get_filename_component(_PYTHON_DIR "${${_PYTHON_LIB}}" DIRECTORY)
            list(APPEND _PYTHON_DIRS "${_PYTHON_DIR}")
        endif()
    endforeach()
    list(REMOVE_DUPLICATES _PYTHON_DIRS)
    set(${_PYTHON_SLD_RESULT}
        ${_PYTHON_DIRS}
        PARENT_SCOPE)
endfunction()

function(_PYTHON_SET_DEVELOPMENT_MODULE_FOUND module)
    if("Development.${module}" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS)
        string(TOUPPER "${module}" id)
        set(module_found TRUE)

        if("LIBRARY" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_${id}_ARTIFACTS
           AND NOT _${_PYTHON_PREFIX}_LIBRARY_RELEASE)
            set(module_found FALSE)
        endif()
        if("INCLUDE_DIR" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_${id}_ARTIFACTS
           AND NOT _${_PYTHON_PREFIX}_INCLUDE_DIR)
            set(module_found FALSE)
        endif()

        set(${_PYTHON_PREFIX}_Development.${module}_FOUND
            ${module_found}
            PARENT_SCOPE)
    endif()
endfunction()

# If major version is specified, it must be the same as internal major version
if(DEFINED ${_PYTHON_PREFIX}_FIND_VERSION_MAJOR
   AND NOT ${_PYTHON_PREFIX}_FIND_VERSION_MAJOR VERSION_EQUAL
       _${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR)
    _python_display_failure(
        "Could NOT find ${_PYTHON_PREFIX}: Wrong major version specified is \"${${_PYTHON_PREFIX}_FIND_VERSION_MAJOR}\", but expected major version is \"${_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR}\""
        )
endif()

# handle components
if(NOT ${_PYTHON_PREFIX}_FIND_COMPONENTS)
    set(${_PYTHON_PREFIX}_FIND_COMPONENTS Interpreter)
    set(${_PYTHON_PREFIX}_FIND_REQUIRED_Interpreter TRUE)
endif()
if("NumPy" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS)
    list(APPEND ${_PYTHON_PREFIX}_FIND_COMPONENTS "Interpreter" "Development.Module")
endif()
if("Development" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS)
    list(APPEND ${_PYTHON_PREFIX}_FIND_COMPONENTS "Development.Module"
         "Development.Embed")
endif()
list(REMOVE_DUPLICATES ${_PYTHON_PREFIX}_FIND_COMPONENTS)
foreach(_${_PYTHON_PREFIX}_COMPONENT IN ITEMS Interpreter Compiler Development
                                              Development.Module Development.Embed NumPy)
    set(${_PYTHON_PREFIX}_${_${_PYTHON_PREFIX}_COMPONENT}_FOUND FALSE)
endforeach()
if(${_PYTHON_PREFIX}_FIND_REQUIRED_Development)
    set(${_PYTHON_PREFIX}_FIND_REQUIRED_Development.Module TRUE)
    set(${_PYTHON_PREFIX}_FIND_REQUIRED_Development.Embed TRUE)
endif()

unset(_${_PYTHON_PREFIX}_FIND_DEVELOPMENT_ARTIFACTS)
unset(_${_PYTHON_PREFIX}_FIND_DEVELOPMENT_MODULE_ARTIFACTS)
unset(_${_PYTHON_PREFIX}_FIND_DEVELOPMENT_EMBED_ARTIFACTS)
if("Development.Module" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS)
    if(CMAKE_SYSTEM_NAME MATCHES "^(Windows.*|CYGWIN|MSYS)$")
        list(APPEND _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_MODULE_ARTIFACTS "LIBRARY")
    endif()
    list(APPEND _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_MODULE_ARTIFACTS "INCLUDE_DIR")
endif()
if("Development.Embed" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS)
    list(APPEND _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_EMBED_ARTIFACTS "LIBRARY"
         "INCLUDE_DIR")
endif()
set(_${_PYTHON_PREFIX}_FIND_DEVELOPMENT_ARTIFACTS
    ${_${_PYTHON_PREFIX}_FIND_DEVELOPMENT_MODULE_ARTIFACTS}
    ${_${_PYTHON_PREFIX}_FIND_DEVELOPMENT_EMBED_ARTIFACTS})
list(REMOVE_DUPLICATES _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_ARTIFACTS)

# Set versions to search default: search any version
set(_${_PYTHON_PREFIX}_FIND_VERSIONS ${_${_PYTHON_PREFIX}_VERSIONS})
unset(_${_PYTHON_PREFIX}_FIND_VERSION_EXACT)

if(${_PYTHON_PREFIX}_FIND_VERSION_COUNT)
    if(${_PYTHON_PREFIX}_FIND_VERSION_EXACT)
        set(_${_PYTHON_PREFIX}_FIND_VERSION_EXACT "EXACT")
        set(_${_PYTHON_PREFIX}_FIND_VERSIONS
            ${${_PYTHON_PREFIX}_FIND_VERSION_MAJOR}.${${_PYTHON_PREFIX}_FIND_VERSION_MINOR}
            )
    else()
        unset(_${_PYTHON_PREFIX}_FIND_VERSIONS)
        # add all compatible versions
        foreach(_${_PYTHON_PREFIX}_VERSION IN LISTS _${_PYTHON_PREFIX}_VERSIONS)
            if(_${_PYTHON_PREFIX}_VERSION
               VERSION_GREATER_EQUAL
               "${${_PYTHON_PREFIX}_FIND_VERSION_MAJOR}.${${_PYTHON_PREFIX}_FIND_VERSION_MINOR}"
               )
                list(APPEND _${_PYTHON_PREFIX}_FIND_VERSIONS
                     ${_${_PYTHON_PREFIX}_VERSION})
            endif()
        endforeach()
    endif()
endif()

# Set ABIs to search default: search any ABI
if(_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR VERSION_LESS "3")
    # ABI not supported
    unset(_${_PYTHON_PREFIX}_FIND_ABI)
    set(_${_PYTHON_PREFIX}_ABIFLAGS "")
else()
    unset(_${_PYTHON_PREFIX}_FIND_ABI)
    unset(_${_PYTHON_PREFIX}_ABIFLAGS)
    if(DEFINED ${_PYTHON_PREFIX}_FIND_ABI)
        # normalization
        string(TOUPPER "${${_PYTHON_PREFIX}_FIND_ABI}" _${_PYTHON_PREFIX}_FIND_ABI)
        list(TRANSFORM _${_PYTHON_PREFIX}_FIND_ABI REPLACE "^(TRUE|Y(ES)?|1)$" "ON")
        list(TRANSFORM _${_PYTHON_PREFIX}_FIND_ABI REPLACE "^(FALSE|N(O)?|0)$" "OFF")
        if(NOT _${_PYTHON_PREFIX}_FIND_ABI MATCHES
           "^(ON|OFF|ANY);(ON|OFF|ANY);(ON|OFF|ANY)$")
            message(
                AUTHOR_WARNING
                    "Find${_PYTHON_PREFIX}: ${${_PYTHON_PREFIX}_FIND_ABI}: invalid value for '${_PYTHON_PREFIX}_FIND_ABI'. Ignore it"
                )
            unset(_${_PYTHON_PREFIX}_FIND_ABI)
        endif()
        _python_get_abiflags(_${_PYTHON_PREFIX}_ABIFLAGS)
    endif()
endif()
unset(${_PYTHON_PREFIX}_SOABI)

# Define lookup strategy
if(CMAKE_VERSION VERSION_LESS 3.15)
    set(_${_PYTHON_PREFIX}_LOOKUP_POLICY "LOCATION")
else()
    cmake_policy(GET CMP0094 _${_PYTHON_PREFIX}_LOOKUP_POLICY)
endif()
if(_${_PYTHON_PREFIX}_LOOKUP_POLICY STREQUAL "NEW")
    set(_${_PYTHON_PREFIX}_FIND_STRATEGY "LOCATION")
else()
    set(_${_PYTHON_PREFIX}_FIND_STRATEGY "VERSION")
endif()
if(DEFINED ${_PYTHON_PREFIX}_FIND_STRATEGY)
    if(NOT ${_PYTHON_PREFIX}_FIND_STRATEGY MATCHES "^(VERSION|LOCATION)$")
        message(
            AUTHOR_WARNING
                "Find${_PYTHON_PREFIX}: ${${_PYTHON_PREFIX}_FIND_STRATEGY}: invalid value for '${_PYTHON_PREFIX}_FIND_STRATEGY'. 'VERSION' or 'LOCATION' expected."
            )
        set(_${_PYTHON_PREFIX}_FIND_STRATEGY "VERSION")
    else()
        set(_${_PYTHON_PREFIX}_FIND_STRATEGY "${${_PYTHON_PREFIX}_FIND_STRATEGY}")
    endif()
endif()

# Python and Anaconda distributions: define which architectures can be used
if(CMAKE_SIZEOF_VOID_P)
    # In this case, search only for 64bit or 32bit
    math(EXPR _${_PYTHON_PREFIX}_ARCH "${CMAKE_SIZEOF_VOID_P} * 8")
    set(_${_PYTHON_PREFIX}_ARCH2 ${_${_PYTHON_PREFIX}_ARCH})
else()
    # architecture unknown, search for both 64bit and 32bit
    set(_${_PYTHON_PREFIX}_ARCH 64)
    set(_${_PYTHON_PREFIX}_ARCH2 32)
endif()

# IronPython support
unset(_${_PYTHON_PREFIX}_IRON_PYTHON_INTERPRETER_NAMES)
unset(_${_PYTHON_PREFIX}_IRON_PYTHON_COMPILER_NAMES)
unset(_${_PYTHON_PREFIX}_IRON_PYTHON_COMPILER_ARCH_FLAGS)
if(CMAKE_SIZEOF_VOID_P)
    if(_${_PYTHON_PREFIX}_ARCH EQUAL "32")
        set(_${_PYTHON_PREFIX}_IRON_PYTHON_COMPILER_ARCH_FLAGS "/platform:x86")
    else()
        set(_${_PYTHON_PREFIX}_IRON_PYTHON_COMPILER_ARCH_FLAGS "/platform:x64")
    endif()
endif()
if(NOT CMAKE_SYSTEM_NAME STREQUAL "Linux")
    # Do not use wrapper script on Linux because it is buggy: -c interpreter option cannot
    # be used
    list(APPEND _${_PYTHON_PREFIX}_IRON_PYTHON_INTERPRETER_NAMES
         "ipy${_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR}" "ipy64" "ipy32" "ipy")
    list(APPEND _${_PYTHON_PREFIX}_IRON_PYTHON_COMPILER_NAMES "ipyc")
endif()
list(APPEND _${_PYTHON_PREFIX}_IRON_PYTHON_INTERPRETER_NAMES "ipy.exe")
list(APPEND _${_PYTHON_PREFIX}_IRON_PYTHON_COMPILER_NAMES "ipyc.exe")
set(_${_PYTHON_PREFIX}_IRON_PYTHON_PATH_SUFFIXES net45 net40 bin)

# PyPy support
if(_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR EQUAL "3")
    set(_${_PYTHON_PREFIX}_PYPY_NAMES pypy3)
    set(_${_PYTHON_PREFIX}_PYPY_LIB_NAMES pypy3-c)
    if(WIN32)
        # special name for runtime part
        list(APPEND _${_PYTHON_PREFIX}_PYPY_LIB_NAMES libpypy3-c)
    endif()
    set(_${_PYTHON_PREFIX}_PYPY_INCLUDE_PATH_SUFFIXES lib/pypy3)
else()
    set(_${_PYTHON_PREFIX}_PYPY_NAMES pypy)
    set(_${_PYTHON_PREFIX}_PYPY_LIB_NAMES pypy-c)
    if(WIN32)
        # special name for runtime part
        list(APPEND _${_PYTHON_PREFIX}_PYPY_LIB_NAMES libpypy-c)
    endif()
    set(_${_PYTHON_PREFIX}_PYPY_INCLUDE_PATH_SUFFIXES lib/pypy)
endif()
set(_${_PYTHON_PREFIX}_PYPY_EXECUTABLE_PATH_SUFFIXES bin)
set(_${_PYTHON_PREFIX}_PYPY_LIBRARY_PATH_SUFFIXES lib libs bin)
list(APPEND _${_PYTHON_PREFIX}_PYPY_INCLUDE_PATH_SUFFIXES include)

# Python Implementations handling
unset(_${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS)
if(DEFINED ${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS)
    foreach(_${_PYTHON_PREFIX}_IMPLEMENTATION IN
            LISTS ${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS)
        if(NOT _${_PYTHON_PREFIX}_IMPLEMENTATION MATCHES "^(CPython|IronPython|PyPy)$")
            message(
                AUTHOR_WARNING
                    "Find${_PYTHON_PREFIX}: ${_${_PYTHON_PREFIX}_IMPLEMENTATION}: invalid value for '${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS'. 'CPython', 'IronPython' or 'PyPy' expected. Value will be ignored."
                )
        else()
            list(APPEND _${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS
                 ${_${_PYTHON_PREFIX}_IMPLEMENTATION})
        endif()
    endforeach()
else()
    if(WIN32)
        set(_${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS CPython IronPython)
    else()
        set(_${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS CPython)
    endif()
endif()

# compute list of names for header file
unset(_${_PYTHON_PREFIX}_INCLUDE_NAMES)
foreach(_${_PYTHON_PREFIX}_IMPLEMENTATION IN
        LISTS _${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS)
    if(_${_PYTHON_PREFIX}_IMPLEMENTATION STREQUAL "CPython")
        list(APPEND _${_PYTHON_PREFIX}_INCLUDE_NAMES "Python.h")
    elseif(_${_PYTHON_PREFIX}_IMPLEMENTATION STREQUAL "PyPy")
        list(APPEND _${_PYTHON_PREFIX}_INCLUDE_NAMES "PyPy.h")
    endif()
endforeach()

# Apple frameworks handling
_python_find_frameworks()

set(_${_PYTHON_PREFIX}_FIND_FRAMEWORK "FIRST")

if(DEFINED ${_PYTHON_PREFIX}_FIND_FRAMEWORK)
    if(NOT ${_PYTHON_PREFIX}_FIND_FRAMEWORK MATCHES "^(FIRST|LAST|NEVER)$")
        message(
            AUTHOR_WARNING
                "Find${_PYTHON_PREFIX}: ${${_PYTHON_PREFIX}_FIND_FRAMEWORK}: invalid value for '${_PYTHON_PREFIX}_FIND_FRAMEWORK'. 'FIRST', 'LAST' or 'NEVER' expected. 'FIRST' will be used instead."
            )
    else()
        set(_${_PYTHON_PREFIX}_FIND_FRAMEWORK ${${_PYTHON_PREFIX}_FIND_FRAMEWORK})
    endif()
elseif(DEFINED CMAKE_FIND_FRAMEWORK)
    if(CMAKE_FIND_FRAMEWORK STREQUAL "ONLY")
        message(
            AUTHOR_WARNING
                "Find${_PYTHON_PREFIX}: CMAKE_FIND_FRAMEWORK: 'ONLY' value is not supported. 'FIRST' will be used instead."
            )
    elseif(NOT CMAKE_FIND_FRAMEWORK MATCHES "^(FIRST|LAST|NEVER)$")
        message(
            AUTHOR_WARNING
                "Find${_PYTHON_PREFIX}: ${CMAKE_FIND_FRAMEWORK}: invalid value for 'CMAKE_FIND_FRAMEWORK'. 'FIRST', 'LAST' or 'NEVER' expected. 'FIRST' will be used instead."
            )
    else()
        set(_${_PYTHON_PREFIX}_FIND_FRAMEWORK ${CMAKE_FIND_FRAMEWORK})
    endif()
endif()

# Save CMAKE_FIND_APPBUNDLE
if(DEFINED CMAKE_FIND_APPBUNDLE)
    set(_${_PYTHON_PREFIX}_CMAKE_FIND_APPBUNDLE ${CMAKE_FIND_APPBUNDLE})
else()
    unset(_${_PYTHON_PREFIX}_CMAKE_FIND_APPBUNDLE)
endif()
# To avoid app bundle lookup
set(CMAKE_FIND_APPBUNDLE "NEVER")

# Save CMAKE_FIND_FRAMEWORK
if(DEFINED CMAKE_FIND_FRAMEWORK)
    set(_${_PYTHON_PREFIX}_CMAKE_FIND_FRAMEWORK ${CMAKE_FIND_FRAMEWORK})
else()
    unset(_${_PYTHON_PREFIX}_CMAKE_FIND_FRAMEWORK)
endif()
# To avoid framework lookup
set(CMAKE_FIND_FRAMEWORK "NEVER")

# Windows Registry handling
if(DEFINED ${_PYTHON_PREFIX}_FIND_REGISTRY)
    if(NOT ${_PYTHON_PREFIX}_FIND_REGISTRY MATCHES "^(FIRST|LAST|NEVER)$")
        message(
            AUTHOR_WARNING
                "Find${_PYTHON_PREFIX}: ${${_PYTHON_PREFIX}_FIND_REGISTRY}: invalid value for '${_PYTHON_PREFIX}_FIND_REGISTRY'. 'FIRST', 'LAST' or 'NEVER' expected. 'FIRST' will be used instead."
            )
        set(_${_PYTHON_PREFIX}_FIND_REGISTRY "FIRST")
    else()
        set(_${_PYTHON_PREFIX}_FIND_REGISTRY ${${_PYTHON_PREFIX}_FIND_REGISTRY})
    endif()
else()
    set(_${_PYTHON_PREFIX}_FIND_REGISTRY "FIRST")
endif()

# virtual environments recognition
if(DEFINED ENV{VIRTUAL_ENV} OR DEFINED ENV{CONDA_PREFIX})
    if(DEFINED ${_PYTHON_PREFIX}_FIND_VIRTUALENV)
        if(NOT ${_PYTHON_PREFIX}_FIND_VIRTUALENV MATCHES "^(FIRST|ONLY|STANDARD)$")
            message(
                AUTHOR_WARNING
                    "Find${_PYTHON_PREFIX}: ${${_PYTHON_PREFIX}_FIND_VIRTUALENV}: invalid value for '${_PYTHON_PREFIX}_FIND_VIRTUALENV'. 'FIRST', 'ONLY' or 'STANDARD' expected. 'FIRST' will be used instead."
                )
            set(_${_PYTHON_PREFIX}_FIND_VIRTUALENV "FIRST")
        else()
            set(_${_PYTHON_PREFIX}_FIND_VIRTUALENV ${${_PYTHON_PREFIX}_FIND_VIRTUALENV})
        endif()
    else()
        set(_${_PYTHON_PREFIX}_FIND_VIRTUALENV FIRST)
    endif()
else()
    set(_${_PYTHON_PREFIX}_FIND_VIRTUALENV STANDARD)
endif()

# Compute search signature This signature will be used to check validity of cached
# variables on new search
set(_${_PYTHON_PREFIX}_SIGNATURE
    "${${_PYTHON_PREFIX}_ROOT_DIR}:${_${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS}:${_${_PYTHON_PREFIX}_FIND_STRATEGY}:${${_PYTHON_PREFIX}_FIND_VIRTUALENV}"
    )
if(NOT WIN32)
    string(APPEND _${_PYTHON_PREFIX}_SIGNATURE ":${${_PYTHON_PREFIX}_USE_STATIC_LIBS}:")
endif()
if(CMAKE_HOST_APPLE)
    string(APPEND _${_PYTHON_PREFIX}_SIGNATURE ":${_${_PYTHON_PREFIX}_FIND_FRAMEWORK}")
endif()
if(CMAKE_HOST_WIN32)
    string(APPEND _${_PYTHON_PREFIX}_SIGNATURE ":${_${_PYTHON_PREFIX}_FIND_REGISTRY}")
endif()

function(_PYTHON_CHECK_DEVELOPMENT_SIGNATURE module)
    if("Development.${module}" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS)
        string(TOUPPER "${module}" id)
        set(signature "${_${_PYTHON_PREFIX}_SIGNATURE}:")
        if("LIBRARY" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_${id}_ARTIFACTS)
            list(APPEND signature "${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}:")
        endif()
        if("INCLUDE_DIR" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_${id}_ARTIFACTS)
            list(APPEND signature "${_${_PYTHON_PREFIX}_INCLUDE_DIR}:")
        endif()
        string(MD5 signature "${signature}")
        if(signature STREQUAL _${_PYTHON_PREFIX}_DEVELOPMENT_${id}_SIGNATURE)
            if("LIBRARY" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_${id}_ARTIFACTS)
                _python_validate_library(
                    ${${_PYTHON_PREFIX}_FIND_VERSION}
                    ${_${_PYTHON_PREFIX}_FIND_VERSION_EXACT} CHECK_EXISTS)
            endif()
            if("INCLUDE_DIR" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_${id}_ARTIFACTS)
                _python_validate_include_dir(
                    ${${_PYTHON_PREFIX}_FIND_VERSION}
                    ${_${_PYTHON_PREFIX}_FIND_VERSION_EXACT} CHECK_EXISTS)
            endif()
        else()
            if("LIBRARY" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_${id}_ARTIFACTS)
                unset(_${_PYTHON_PREFIX}_LIBRARY_RELEASE CACHE)
                unset(_${_PYTHON_PREFIX}_LIBRARY_DEBUG CACHE)
            endif()
            if("INCLUDE_DIR" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_${id}_ARTIFACTS)
                unset(_${_PYTHON_PREFIX}_INCLUDE_DIR CACHE)
            endif()
        endif()
        if(("LIBRARY" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_${id}_ARTIFACTS
            AND NOT _${_PYTHON_PREFIX}_LIBRARY_RELEASE)
           OR ("INCLUDE_DIR" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_${id}_ARTIFACTS
               AND NOT _${_PYTHON_PREFIX}_INCLUDE_DIR))
            unset(_${_PYTHON_PREFIX}_CONFIG CACHE)
            unset(_${_PYTHON_PREFIX}_DEVELOPMENT_${id}_SIGNATURE CACHE)
        endif()
    endif()
endfunction()

function(_PYTHON_COMPUTE_DEVELOPMENT_SIGNATURE module)
    string(TOUPPER "${module}" id)
    if(${_PYTHON_PREFIX}_Development.${module}_FOUND)
        set(signature "${_${_PYTHON_PREFIX}_SIGNATURE}:")
        if("LIBRARY" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_${id}_ARTIFACTS)
            list(APPEND signature "${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}:")
        endif()
        if("INCLUDE_DIR" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_${id}_ARTIFACTS)
            list(APPEND signature "${_${_PYTHON_PREFIX}_INCLUDE_DIR}:")
        endif()
        string(MD5 signature "${signature}")
        set(_${_PYTHON_PREFIX}_DEVELOPMENT_${id}_SIGNATURE
            "${signature}"
            CACHE INTERNAL "")
    else()
        unset(_${_PYTHON_PREFIX}_DEVELOPMENT_${id}_SIGNATURE CACHE)
    endif()
endfunction()

unset(_${_PYTHON_PREFIX}_REQUIRED_VARS)
unset(_${_PYTHON_PREFIX}_CACHED_VARS)
unset(_${_PYTHON_PREFIX}_Interpreter_REASON_FAILURE)
unset(_${_PYTHON_PREFIX}_Compiler_REASON_FAILURE)
unset(_${_PYTHON_PREFIX}_Development_REASON_FAILURE)
unset(_${_PYTHON_PREFIX}_NumPy_REASON_FAILURE)

# preamble For IronPython on platforms other than Windows, search for the .Net interpreter
if("IronPython" IN_LIST _${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS AND NOT WIN32)
    find_program(${_PYTHON_PREFIX}_DOTNET_LAUNCHER NAMES "mono")
endif()

# first step, search for the interpreter
if("Interpreter" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS)
    list(APPEND _${_PYTHON_PREFIX}_CACHED_VARS _${_PYTHON_PREFIX}_EXECUTABLE
         _${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES)
    if(${_PYTHON_PREFIX}_FIND_REQUIRED_Interpreter)
        list(APPEND _${_PYTHON_PREFIX}_REQUIRED_VARS ${_PYTHON_PREFIX}_EXECUTABLE)
    endif()

    if(DEFINED ${_PYTHON_PREFIX}_EXECUTABLE AND IS_ABSOLUTE
                                                "${${_PYTHON_PREFIX}_EXECUTABLE}")
        if(NOT ${_PYTHON_PREFIX}_EXECUTABLE STREQUAL _${_PYTHON_PREFIX}_EXECUTABLE)
            # invalidate cache properties
            unset(_${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES CACHE)
        endif()
        set(_${_PYTHON_PREFIX}_EXECUTABLE
            "${${_PYTHON_PREFIX}_EXECUTABLE}"
            CACHE INTERNAL "")
    elseif(DEFINED _${_PYTHON_PREFIX}_EXECUTABLE)
        # compute interpreter signature and check validity of definition
        string(MD5 __${_PYTHON_PREFIX}_INTERPRETER_SIGNATURE
                   "${_${_PYTHON_PREFIX}_SIGNATURE}:${_${_PYTHON_PREFIX}_EXECUTABLE}")
        if(__${_PYTHON_PREFIX}_INTERPRETER_SIGNATURE STREQUAL
           _${_PYTHON_PREFIX}_INTERPRETER_SIGNATURE)
            # check version validity
            if(${_PYTHON_PREFIX}_FIND_VERSION_EXACT)
                _python_validate_interpreter(${${_PYTHON_PREFIX}_FIND_VERSION} EXACT
                                             CHECK_EXISTS)
            else()
                _python_validate_interpreter(${${_PYTHON_PREFIX}_FIND_VERSION}
                                             CHECK_EXISTS)
            endif()
        else()
            unset(_${_PYTHON_PREFIX}_EXECUTABLE CACHE)
        endif()
        if(NOT _${_PYTHON_PREFIX}_EXECUTABLE)
            unset(_${_PYTHON_PREFIX}_INTERPRETER_SIGNATURE CACHE)
            unset(_${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES CACHE)
        endif()
    endif()

    if(NOT _${_PYTHON_PREFIX}_EXECUTABLE)
        set(_${_PYTHON_PREFIX}_HINTS "${${_PYTHON_PREFIX}_ROOT_DIR}" ENV
                                     ${_PYTHON_PREFIX}_ROOT_DIR)

        if(_${_PYTHON_PREFIX}_FIND_STRATEGY STREQUAL "LOCATION")
            # build all executable names
            _python_get_names(_${_PYTHON_PREFIX}_NAMES VERSION
                              ${_${_PYTHON_PREFIX}_FIND_VERSIONS} POSIX INTERPRETER)
            _python_get_path_suffixes(_${_PYTHON_PREFIX}_PATH_SUFFIXES VERSION
                                      ${_${_PYTHON_PREFIX}_FIND_VERSIONS} INTERPRETER)

            # Framework Paths
            _python_get_frameworks(_${_PYTHON_PREFIX}_FRAMEWORK_PATHS VERSION
                                   ${_${_PYTHON_PREFIX}_FIND_VERSIONS})
            # Registry Paths
            _python_get_registries(_${_PYTHON_PREFIX}_REGISTRY_PATHS VERSION
                                   ${_${_PYTHON_PREFIX}_FIND_VERSIONS})

            while(TRUE)
                # Virtual environments handling
                if(_${_PYTHON_PREFIX}_FIND_VIRTUALENV MATCHES "^(FIRST|ONLY)$")
                    find_program(
                        _${_PYTHON_PREFIX}_EXECUTABLE
                        NAMES ${_${_PYTHON_PREFIX}_NAMES} NAMES_PER_DIR
                        HINTS ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ENV VIRTUAL_ENV ENV CONDA_PREFIX
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH
                        NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)

                    _python_validate_interpreter(${${_PYTHON_PREFIX}_FIND_VERSION}
                                                 ${_${_PYTHON_PREFIX}_FIND_VERSION_EXACT})
                    if(_${_PYTHON_PREFIX}_EXECUTABLE)
                        break()
                    endif()
                    if(_${_PYTHON_PREFIX}_FIND_VIRTUALENV STREQUAL "ONLY")
                        break()
                    endif()
                endif()

                # Apple frameworks handling
                if(CMAKE_HOST_APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL
                                        "FIRST")
                    find_program(
                        _${_PYTHON_PREFIX}_EXECUTABLE
                        NAMES ${_${_PYTHON_PREFIX}_NAMES} NAMES_PER_DIR
                        HINTS ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH
                        NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                    _python_validate_interpreter(${${_PYTHON_PREFIX}_FIND_VERSION}
                                                 ${_${_PYTHON_PREFIX}_FIND_VERSION_EXACT})
                    if(_${_PYTHON_PREFIX}_EXECUTABLE)
                        break()
                    endif()
                endif()
                # Windows registry
                if(CMAKE_HOST_WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "FIRST")
                    find_program(
                        _${_PYTHON_PREFIX}_EXECUTABLE
                        NAMES ${_${_PYTHON_PREFIX}_NAMES} NAMES_PER_DIR
                        HINTS ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                    _python_validate_interpreter(${${_PYTHON_PREFIX}_FIND_VERSION}
                                                 ${_${_PYTHON_PREFIX}_FIND_VERSION_EXACT})
                    if(_${_PYTHON_PREFIX}_EXECUTABLE)
                        break()
                    endif()
                endif()

                # try using HINTS
                find_program(
                    _${_PYTHON_PREFIX}_EXECUTABLE
                    NAMES ${_${_PYTHON_PREFIX}_NAMES} NAMES_PER_DIR
                    HINTS ${_${_PYTHON_PREFIX}_HINTS}
                    PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                    NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                _python_validate_interpreter(${${_PYTHON_PREFIX}_FIND_VERSION}
                                             ${_${_PYTHON_PREFIX}_FIND_VERSION_EXACT})
                if(_${_PYTHON_PREFIX}_EXECUTABLE)
                    break()
                endif()
                # try using standard paths
                find_program(
                    _${_PYTHON_PREFIX}_EXECUTABLE
                    NAMES ${_${_PYTHON_PREFIX}_NAMES} NAMES_PER_DIR
                    PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES})
                _python_validate_interpreter(${${_PYTHON_PREFIX}_FIND_VERSION}
                                             ${_${_PYTHON_PREFIX}_FIND_VERSION_EXACT})
                if(_${_PYTHON_PREFIX}_EXECUTABLE)
                    break()
                endif()

                # Apple frameworks handling
                if(CMAKE_HOST_APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL "LAST")
                    find_program(
                        _${_PYTHON_PREFIX}_EXECUTABLE
                        NAMES ${_${_PYTHON_PREFIX}_NAMES} NAMES_PER_DIR
                        PATHS ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_DEFAULT_PATH)
                    _python_validate_interpreter(${${_PYTHON_PREFIX}_FIND_VERSION}
                                                 ${_${_PYTHON_PREFIX}_FIND_VERSION_EXACT})
                    if(_${_PYTHON_PREFIX}_EXECUTABLE)
                        break()
                    endif()
                endif()
                # Windows registry
                if(CMAKE_HOST_WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "LAST")
                    find_program(
                        _${_PYTHON_PREFIX}_EXECUTABLE
                        NAMES ${_${_PYTHON_PREFIX}_NAMES} NAMES_PER_DIR
                        PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_DEFAULT_PATH)
                    _python_validate_interpreter(${${_PYTHON_PREFIX}_FIND_VERSION}
                                                 ${_${_PYTHON_PREFIX}_FIND_VERSION_EXACT})
                    if(_${_PYTHON_PREFIX}_EXECUTABLE)
                        break()
                    endif()
                endif()

                break()
            endwhile()
        else()
            # look-up for various versions and locations
            foreach(_${_PYTHON_PREFIX}_VERSION IN LISTS _${_PYTHON_PREFIX}_FIND_VERSIONS)
                _python_get_names(_${_PYTHON_PREFIX}_NAMES VERSION
                                  ${_${_PYTHON_PREFIX}_VERSION} POSIX INTERPRETER)
                _python_get_path_suffixes(_${_PYTHON_PREFIX}_PATH_SUFFIXES VERSION
                                          ${_${_PYTHON_PREFIX}_VERSION} INTERPRETER)

                _python_get_frameworks(_${_PYTHON_PREFIX}_FRAMEWORK_PATHS VERSION
                                       ${_${_PYTHON_PREFIX}_VERSION})
                _python_get_registries(_${_PYTHON_PREFIX}_REGISTRY_PATHS VERSION
                                       ${_${_PYTHON_PREFIX}_VERSION})

                # Virtual environments handling
                if(_${_PYTHON_PREFIX}_FIND_VIRTUALENV MATCHES "^(FIRST|ONLY)$")
                    find_program(
                        _${_PYTHON_PREFIX}_EXECUTABLE
                        NAMES ${_${_PYTHON_PREFIX}_NAMES} NAMES_PER_DIR
                        HINTS ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ENV VIRTUAL_ENV ENV CONDA_PREFIX
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH
                        NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                    _python_validate_interpreter(${_${_PYTHON_PREFIX}_VERSION} EXACT)
                    if(_${_PYTHON_PREFIX}_EXECUTABLE)
                        break()
                    endif()
                    if(_${_PYTHON_PREFIX}_FIND_VIRTUALENV STREQUAL "ONLY")
                        continue()
                    endif()
                endif()

                # Apple frameworks handling
                if(CMAKE_HOST_APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL
                                        "FIRST")
                    find_program(
                        _${_PYTHON_PREFIX}_EXECUTABLE
                        NAMES ${_${_PYTHON_PREFIX}_NAMES} NAMES_PER_DIR
                        HINTS ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH
                        NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                endif()

                # Windows registry
                if(CMAKE_HOST_WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "FIRST")
                    find_program(
                        _${_PYTHON_PREFIX}_EXECUTABLE
                        NAMES ${_${_PYTHON_PREFIX}_NAMES} NAMES_PER_DIR
                        HINTS ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                endif()

                _python_validate_interpreter(${_${_PYTHON_PREFIX}_VERSION} EXACT)
                if(_${_PYTHON_PREFIX}_EXECUTABLE)
                    break()
                endif()

                # try using HINTS
                find_program(
                    _${_PYTHON_PREFIX}_EXECUTABLE
                    NAMES ${_${_PYTHON_PREFIX}_NAMES} NAMES_PER_DIR
                    HINTS ${_${_PYTHON_PREFIX}_HINTS}
                    PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                    NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                _python_validate_interpreter(${_${_PYTHON_PREFIX}_VERSION} EXACT)
                if(_${_PYTHON_PREFIX}_EXECUTABLE)
                    break()
                endif()
                # try using standard paths. NAMES_PER_DIR is not defined on purpose to
                # have a chance to find expected version. For example, typical systems
                # have 'python' for version 2.* and 'python3' for version 3.*. So looking
                # for names per dir will find, potentially, systematically 'python' (i.e.
                # version 2) even if version 3 is searched.
                find_program(
                    _${_PYTHON_PREFIX}_EXECUTABLE
                    NAMES ${_${_PYTHON_PREFIX}_NAMES}
                    PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES})
                _python_validate_interpreter(${_${_PYTHON_PREFIX}_VERSION} EXACT)
                if(_${_PYTHON_PREFIX}_EXECUTABLE)
                    break()
                endif()

                # Apple frameworks handling
                if(CMAKE_HOST_APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL "LAST")
                    find_program(
                        _${_PYTHON_PREFIX}_EXECUTABLE
                        NAMES ${_${_PYTHON_PREFIX}_NAMES} NAMES_PER_DIR
                        PATHS ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_DEFAULT_PATH)
                endif()

                # Windows registry
                if(CMAKE_HOST_WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "LAST")
                    find_program(
                        _${_PYTHON_PREFIX}_EXECUTABLE
                        NAMES ${_${_PYTHON_PREFIX}_NAMES} NAMES_PER_DIR
                        PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_DEFAULT_PATH)
                endif()

                _python_validate_interpreter(${_${_PYTHON_PREFIX}_VERSION} EXACT)
                if(_${_PYTHON_PREFIX}_EXECUTABLE)
                    break()
                endif()
            endforeach()

            if(NOT _${_PYTHON_PREFIX}_EXECUTABLE
               AND NOT _${_PYTHON_PREFIX}_FIND_VIRTUALENV STREQUAL "ONLY")
                # No specific version found. Retry with generic names and standard paths.
                # NAMES_PER_DIR is not defined on purpose to have a chance to find
                # expected version. For example, typical systems have 'python' for version
                # 2.* and 'python3' for version 3.*. So looking for names per dir will
                # find, potentially, systematically 'python' (i.e. version 2) even if
                # version 3 is searched.
                _python_get_names(_${_PYTHON_PREFIX}_NAMES POSIX INTERPRETER)
                find_program(_${_PYTHON_PREFIX}_EXECUTABLE
                             NAMES ${_${_PYTHON_PREFIX}_NAMES})
                _python_validate_interpreter()
            endif()
        endif()
    endif()

    set(${_PYTHON_PREFIX}_EXECUTABLE "${_${_PYTHON_PREFIX}_EXECUTABLE}")
    _python_get_launcher(_${_PYTHON_PREFIX}_INTERPRETER_LAUNCHER INTERPRETER)

    # retrieve exact version of executable found
    if(_${_PYTHON_PREFIX}_EXECUTABLE)
        execute_process(
            COMMAND
                ${_${_PYTHON_PREFIX}_INTERPRETER_LAUNCHER}
                "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                "import sys; sys.stdout.write('.'.join([str(x) for x in sys.version_info[:3]]))"
            RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
            OUTPUT_VARIABLE ${_PYTHON_PREFIX}_VERSION
            ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
        if(NOT _${_PYTHON_PREFIX}_RESULT)
            set(_${_PYTHON_PREFIX}_EXECUTABLE_USABLE TRUE)
        else()
            # Interpreter is not usable
            set(_${_PYTHON_PREFIX}_EXECUTABLE_USABLE FALSE)
            unset(${_PYTHON_PREFIX}_VERSION)
            set(_${_PYTHON_PREFIX}_Interpreter_REASON_FAILURE
                "Cannot run the interpreter \"${_${_PYTHON_PREFIX}_EXECUTABLE}\"")
        endif()
    endif()

    if(_${_PYTHON_PREFIX}_EXECUTABLE AND _${_PYTHON_PREFIX}_EXECUTABLE_USABLE)
        if(_${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES)
            set(${_PYTHON_PREFIX}_Interpreter_FOUND TRUE)

            list(GET _${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES 0
                 ${_PYTHON_PREFIX}_INTERPRETER_ID)

            list(GET _${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES 1
                 ${_PYTHON_PREFIX}_VERSION_MAJOR)
            list(GET _${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES 2
                 ${_PYTHON_PREFIX}_VERSION_MINOR)
            list(GET _${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES 3
                 ${_PYTHON_PREFIX}_VERSION_PATCH)

            list(GET _${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES 4 _${_PYTHON_PREFIX}_ARCH)
            set(_${_PYTHON_PREFIX}_ARCH2 ${_${_PYTHON_PREFIX}_ARCH})

            list(GET _${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES 5
                 _${_PYTHON_PREFIX}_ABIFLAGS)
            list(GET _${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES 6 ${_PYTHON_PREFIX}_SOABI)

            list(GET _${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES 7 ${_PYTHON_PREFIX}_STDLIB)
            list(GET _${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES 8
                 ${_PYTHON_PREFIX}_STDARCH)
            list(GET _${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES 9
                 ${_PYTHON_PREFIX}_SITELIB)
            list(GET _${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES 10
                 ${_PYTHON_PREFIX}_SITEARCH)
        else()
            string(REGEX MATCHALL "[0-9]+" _${_PYTHON_PREFIX}_VERSIONS
                         "${${_PYTHON_PREFIX}_VERSION}")
            list(GET _${_PYTHON_PREFIX}_VERSIONS 0 ${_PYTHON_PREFIX}_VERSION_MAJOR)
            list(GET _${_PYTHON_PREFIX}_VERSIONS 1 ${_PYTHON_PREFIX}_VERSION_MINOR)
            list(GET _${_PYTHON_PREFIX}_VERSIONS 2 ${_PYTHON_PREFIX}_VERSION_PATCH)

            if(${_PYTHON_PREFIX}_VERSION_MAJOR VERSION_EQUAL
               _${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR)
                set(${_PYTHON_PREFIX}_Interpreter_FOUND TRUE)

                # Use interpreter version and ABI for future searches to ensure
                # consistency
                set(_${_PYTHON_PREFIX}_FIND_VERSIONS
                    ${${_PYTHON_PREFIX}_VERSION_MAJOR}.${${_PYTHON_PREFIX}_VERSION_MINOR})
                execute_process(
                    COMMAND
                        ${_${_PYTHON_PREFIX}_INTERPRETR_LAUNCHER}
                        "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                        "import sys; sys.stdout.write(sys.abiflags)"
                    RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                    OUTPUT_VARIABLE _${_PYTHON_PREFIX}_ABIFLAGS
                    ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
                if(_${_PYTHON_PREFIX}_RESULT)
                    # assunme ABI is not supported
                    set(_${_PYTHON_PREFIX}_ABIFLAGS "")
                endif()
            endif()

            if(${_PYTHON_PREFIX}_Interpreter_FOUND)
                unset(_${_PYTHON_PREFIX}_Interpreter_REASON_FAILURE)

                # compute and save interpreter signature
                string(
                    MD5 __${_PYTHON_PREFIX}_INTERPRETER_SIGNATURE
                        "${_${_PYTHON_PREFIX}_SIGNATURE}:${_${_PYTHON_PREFIX}_EXECUTABLE}"
                    )
                set(_${_PYTHON_PREFIX}_INTERPRETER_SIGNATURE
                    "${__${_PYTHON_PREFIX}_INTERPRETER_SIGNATURE}"
                    CACHE INTERNAL "")

                if(NOT CMAKE_SIZEOF_VOID_P)
                    # determine interpreter architecture
                    execute_process(
                        COMMAND
                            ${_${_PYTHON_PREFIX}_INTERPRETER_LAUNCHER}
                            "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                            "import sys; sys.stdout.write(str(sys.maxsize > 2**32))"
                        RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                        OUTPUT_VARIABLE ${_PYTHON_PREFIX}_IS64BIT
                        ERROR_VARIABLE ${_PYTHON_PREFIX}_IS64BIT)
                    if(NOT _${_PYTHON_PREFIX}_RESULT)
                        if(${_PYTHON_PREFIX}_IS64BIT)
                            set(_${_PYTHON_PREFIX}_ARCH 64)
                            set(_${_PYTHON_PREFIX}_ARCH2 64)
                        else()
                            set(_${_PYTHON_PREFIX}_ARCH 32)
                            set(_${_PYTHON_PREFIX}_ARCH2 32)
                        endif()
                    endif()
                endif()

                # retrieve interpreter identity
                execute_process(
                    COMMAND ${_${_PYTHON_PREFIX}_INTERPRETER_LAUNCHER}
                            "${_${_PYTHON_PREFIX}_EXECUTABLE}" -V
                    RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                    OUTPUT_VARIABLE ${_PYTHON_PREFIX}_INTERPRETER_ID
                    ERROR_VARIABLE ${_PYTHON_PREFIX}_INTERPRETER_ID)
                if(NOT _${_PYTHON_PREFIX}_RESULT)
                    if(${_PYTHON_PREFIX}_INTERPRETER_ID MATCHES "Anaconda")
                        set(${_PYTHON_PREFIX}_INTERPRETER_ID "Anaconda")
                    elseif(${_PYTHON_PREFIX}_INTERPRETER_ID MATCHES "Enthought")
                        set(${_PYTHON_PREFIX}_INTERPRETER_ID "Canopy")
                    elseif(${_PYTHON_PREFIX}_INTERPRETER_ID MATCHES "PyPy ([0-9.]+)")
                        set(${_PYTHON_PREFIX}_INTERPRETER_ID "PyPy")
                        set(${_PYTHON_PREFIX}_PyPy_VERSION "${CMAKE_MATCH_1}")
                    else()
                        string(
                            REGEX
                            REPLACE "^([^ ]+).*" "\\1" ${_PYTHON_PREFIX}_INTERPRETER_ID
                                    "${${_PYTHON_PREFIX}_INTERPRETER_ID}")
                        if(${_PYTHON_PREFIX}_INTERPRETER_ID STREQUAL "Python")
                            # try to get a more precise ID
                            execute_process(
                                COMMAND
                                    ${_${_PYTHON_PREFIX}_INTERPRETER_LAUNCHER}
                                    "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                                    "import sys; sys.stdout.write(sys.copyright)"
                                RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                                OUTPUT_VARIABLE ${_PYTHON_PREFIX}_COPYRIGHT
                                ERROR_QUIET)
                            if(${_PYTHON_PREFIX}_COPYRIGHT MATCHES "ActiveState")
                                set(${_PYTHON_PREFIX}_INTERPRETER_ID "ActivePython")
                            endif()
                        endif()
                    endif()
                else()
                    set(${_PYTHON_PREFIX}_INTERPRETER_ID Python)
                endif()

                # retrieve various package installation directories
                execute_process(
                    COMMAND
                        ${_${_PYTHON_PREFIX}_INTERPRETER_LAUNCHER}
                        "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                        "import sys\ntry:\n   from distutils import sysconfig\n   sys.stdout.write(';'.join([sysconfig.get_python_lib(plat_specific=False,standard_lib=True),sysconfig.get_python_lib(plat_specific=True,standard_lib=True),sysconfig.get_python_lib(plat_specific=False,standard_lib=False),sysconfig.get_python_lib(plat_specific=True,standard_lib=False)]))\nexcept Exception:\n   import sysconfig\n   sys.stdout.write(';'.join([sysconfig.get_path('stdlib'),sysconfig.get_path('platstdlib'),sysconfig.get_path('purelib'),sysconfig.get_path('platlib')]))"
                    RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                    OUTPUT_VARIABLE _${_PYTHON_PREFIX}_LIBPATHS
                    ERROR_QUIET)
                if(NOT _${_PYTHON_PREFIX}_RESULT)
                    list(GET _${_PYTHON_PREFIX}_LIBPATHS 0 ${_PYTHON_PREFIX}_STDLIB)
                    list(GET _${_PYTHON_PREFIX}_LIBPATHS 1 ${_PYTHON_PREFIX}_STDARCH)
                    list(GET _${_PYTHON_PREFIX}_LIBPATHS 2 ${_PYTHON_PREFIX}_SITELIB)
                    list(GET _${_PYTHON_PREFIX}_LIBPATHS 3 ${_PYTHON_PREFIX}_SITEARCH)
                else()
                    unset(${_PYTHON_PREFIX}_STDLIB)
                    unset(${_PYTHON_PREFIX}_STDARCH)
                    unset(${_PYTHON_PREFIX}_SITELIB)
                    unset(${_PYTHON_PREFIX}_SITEARCH)
                endif()

                _python_get_config_var(${_PYTHON_PREFIX}_SOABI SOABI)

                # store properties in the cache to speed-up future searches
                set(_${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES
                    "${${_PYTHON_PREFIX}_INTERPRETER_ID};${${_PYTHON_PREFIX}_VERSION_MAJOR};${${_PYTHON_PREFIX}_VERSION_MINOR};${${_PYTHON_PREFIX}_VERSION_PATCH};${_${_PYTHON_PREFIX}_ARCH};${_${_PYTHON_PREFIX}_ABIFLAGS};${${_PYTHON_PREFIX}_SOABI};${${_PYTHON_PREFIX}_STDLIB};${${_PYTHON_PREFIX}_STDARCH};${${_PYTHON_PREFIX}_SITELIB};${${_PYTHON_PREFIX}_SITEARCH}"
                    CACHE INTERNAL "${_PYTHON_PREFIX} Properties")
            else()
                unset(_${_PYTHON_PREFIX}_INTERPRETER_SIGNATURE CACHE)
                unset(${_PYTHON_PREFIX}_INTERPRETER_ID)
            endif()
        endif()
    endif()

    if(${_PYTHON_PREFIX}_ARTIFACTS_INTERACTIVE)
        set(${_PYTHON_PREFIX}_EXECUTABLE
            "${_${_PYTHON_PREFIX}_EXECUTABLE}"
            CACHE FILEPATH "${_PYTHON_PREFIX} Interpreter")
    endif()

    _python_mark_as_internal(
        _${_PYTHON_PREFIX}_EXECUTABLE _${_PYTHON_PREFIX}_INTERPRETER_PROPERTIES
        _${_PYTHON_PREFIX}_INTERPRETER_SIGNATURE)
endif()

# second step, search for compiler (IronPython)
if("Compiler" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS)
    list(APPEND _${_PYTHON_PREFIX}_CACHED_VARS _${_PYTHON_PREFIX}_COMPILER)
    if(${_PYTHON_PREFIX}_FIND_REQUIRED_Compiler)
        list(APPEND _${_PYTHON_PREFIX}_REQUIRED_VARS ${_PYTHON_PREFIX}_COMPILER)
    endif()

    if(NOT "IronPython" IN_LIST _${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS)
        unset(_${_PYTHON_PREFIX}_COMPILER CACHE)
        unset(_${_PYTHON_PREFIX}_COMPILER_SIGNATURE CACHE)
    elseif(DEFINED ${_PYTHON_PREFIX}_COMPILER AND IS_ABSOLUTE
                                                  "${${_PYTHON_PREFIX}_COMPILER}")
        set(_${_PYTHON_PREFIX}_COMPILER
            "${${_PYTHON_PREFIX}_COMPILER}"
            CACHE INTERNAL "")
    elseif(DEFINED _${_PYTHON_PREFIX}_COMPILER)
        # compute compiler signature and check validity of definition
        string(MD5 __${_PYTHON_PREFIX}_COMPILER_SIGNATURE
                   "${_${_PYTHON_PREFIX}_SIGNATURE}:${_${_PYTHON_PREFIX}_COMPILER}")
        if(__${_PYTHON_PREFIX}_COMPILER_SIGNATURE STREQUAL
           _${_PYTHON_PREFIX}_COMPILER_SIGNATURE)
            # check version validity
            if(${_PYTHON_PREFIX}_FIND_VERSION_EXACT)
                _python_validate_compiler(${${_PYTHON_PREFIX}_FIND_VERSION} EXACT
                                          CHECK_EXISTS)
            else()
                _python_validate_compiler(${${_PYTHON_PREFIX}_FIND_VERSION} CHECK_EXISTS)
            endif()
        else()
            unset(_${_PYTHON_PREFIX}_COMPILER CACHE)
            unset(_${_PYTHON_PREFIX}_COMPILER_SIGNATURE CACHE)
        endif()
    endif()

    if("IronPython" IN_LIST _${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS
       AND NOT _${_PYTHON_PREFIX}_COMPILER)
        # IronPython specific artifacts If IronPython interpreter is found, use its path
        unset(_${_PYTHON_PREFIX}_IRON_ROOT)
        if(${_PYTHON_PREFIX}_Interpreter_FOUND AND ${_PYTHON_PREFIX}_INTERPRETER_ID
                                                   STREQUAL "IronPython")
            get_filename_component(_${_PYTHON_PREFIX}_IRON_ROOT
                                   "${${_PYTHON_PREFIX}_EXECUTABLE}" DIRECTORY)
        endif()

        if(_${_PYTHON_PREFIX}_FIND_STRATEGY STREQUAL "LOCATION")
            _python_get_names(
                _${_PYTHON_PREFIX}_COMPILER_NAMES IMPLEMENTATIONS IronPython VERSION
                ${_${_PYTHON_PREFIX}_FIND_VERSIONS} COMPILER)

            _python_get_path_suffixes(
                _${_PYTHON_PREFIX}_PATH_SUFFIXES IMPLEMENTATIONS IronPython VERSION
                ${_${_PYTHON_PREFIX}_FIND_VERSIONS} COMPILER)

            _python_get_frameworks(_${_PYTHON_PREFIX}_FRAMEWORK_PATHS IMPLEMENTATIONS
                                   IronPython VERSION ${_${_PYTHON_PREFIX}_FIND_VERSIONS})
            _python_get_registries(_${_PYTHON_PREFIX}_REGISTRY_PATHS IMPLEMENTATIONS
                                   IronPython VERSION ${_${_PYTHON_PREFIX}_FIND_VERSIONS})

            while(TRUE)
                # Apple frameworks handling
                if(CMAKE_HOST_APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL
                                        "FIRST")
                    find_program(
                        _${_PYTHON_PREFIX}_COMPILER
                        NAMES ${_${_PYTHON_PREFIX}_COMPILER_NAMES} NAMES_PER_DIR
                        HINTS ${_${_PYTHON_PREFIX}_IRON_ROOT} ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH
                        NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                    _python_validate_compiler(${${_PYTHON_PREFIX}_FIND_VERSION}
                                              ${_${_PYTHON_PREFIX}_FIND_VERSION_EXACT})
                    if(_${_PYTHON_PREFIX}_COMPILER)
                        break()
                    endif()
                endif()
                # Windows registry
                if(CMAKE_HOST_WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "FIRST")
                    find_program(
                        _${_PYTHON_PREFIX}_COMPILER
                        NAMES ${_${_PYTHON_PREFIX}_COMPILER_NAMES} NAMES_PER_DIR
                        HINTS ${_${_PYTHON_PREFIX}_IRON_ROOT} ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                    _python_validate_compiler(${${_PYTHON_PREFIX}_FIND_VERSION}
                                              ${_${_PYTHON_PREFIX}_FIND_VERSION_EXACT})
                    if(_${_PYTHON_PREFIX}_COMPILER)
                        break()
                    endif()
                endif()

                # try using HINTS
                find_program(
                    _${_PYTHON_PREFIX}_COMPILER
                    NAMES ${_${_PYTHON_PREFIX}_COMPILER_NAMES} NAMES_PER_DIR
                    HINTS ${_${_PYTHON_PREFIX}_IRON_ROOT} ${_${_PYTHON_PREFIX}_HINTS}
                    PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                    NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                _python_validate_compiler(${${_PYTHON_PREFIX}_FIND_VERSION}
                                          ${_${_PYTHON_PREFIX}_FIND_VERSION_EXACT})
                if(_${_PYTHON_PREFIX}_COMPILER)
                    break()
                endif()

                # try using standard paths
                find_program(
                    _${_PYTHON_PREFIX}_COMPILER
                    NAMES ${_${_PYTHON_PREFIX}_COMPILER_NAMES} NAMES_PER_DIR
                    PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES})
                _python_validate_compiler(${${_PYTHON_PREFIX}_FIND_VERSION}
                                          ${_${_PYTHON_PREFIX}_FIND_VERSION_EXACT})
                if(_${_PYTHON_PREFIX}_COMPILER)
                    break()
                endif()

                # Apple frameworks handling
                if(CMAKE_HOST_APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL "LAST")
                    find_program(
                        _${_PYTHON_PREFIX}_COMPILER
                        NAMES ${_${_PYTHON_PREFIX}_COMPILER_NAMES} NAMES_PER_DIR
                        PATHS ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_DEFAULT_PATH)
                    _python_validate_compiler(${${_PYTHON_PREFIX}_FIND_VERSION}
                                              ${_${_PYTHON_PREFIX}_FIND_VERSION_EXACT})
                    if(_${_PYTHON_PREFIX}_COMPILER)
                        break()
                    endif()
                endif()
                # Windows registry
                if(CMAKE_HOST_WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "LAST")
                    find_program(
                        _${_PYTHON_PREFIX}_COMPILER
                        NAMES ${_${_PYTHON_PREFIX}_COMPILER_NAMES} NAMES_PER_DIR
                        PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_DEFAULT_PATH)
                    if(_${_PYTHON_PREFIX}_COMPILER)
                        break()
                    endif()
                endif()

                break()
            endwhile()
        else()
            # try using root dir and registry
            foreach(_${_PYTHON_PREFIX}_VERSION IN LISTS _${_PYTHON_PREFIX}_FIND_VERSIONS)
                _python_get_names(
                    _${_PYTHON_PREFIX}_COMPILER_NAMES IMPLEMENTATIONS IronPython VERSION
                    ${_${_PYTHON_PREFIX}_FIND_VERSIONS} COMPILER)

                _python_get_path_suffixes(
                    _${_PYTHON_PREFIX}_PATH_SUFFIXES IMPLEMENTATIONS IronPython VERSION
                    ${_${_PYTHON_PREFIX}_FIND_VERSION} COMPILER)

                _python_get_frameworks(_${_PYTHON_PREFIX}_FRAMEWORK_PATHS IMPLEMENTATIONS
                                       IronPython VERSION ${_${_PYTHON_PREFIX}_VERSION})
                _python_get_registries(_${_PYTHON_PREFIX}_REGISTRY_PATHS IMPLEMENTATIONS
                                       IronPython VERSION ${_${_PYTHON_PREFIX}_VERSION})

                # Apple frameworks handling
                if(CMAKE_HOST_APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL
                                        "FIRST")
                    find_program(
                        _${_PYTHON_PREFIX}_COMPILER
                        NAMES ${_${_PYTHON_PREFIX}_COMPILER_NAMES} NAMES_PER_DIR
                        HINTS ${_${_PYTHON_PREFIX}_IRON_ROOT} ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH
                        NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                    _python_validate_compiler(${_${_PYTHON_PREFIX}_VERSION} EXACT)
                    if(_${_PYTHON_PREFIX}_COMPILER)
                        break()
                    endif()
                endif()
                # Windows registry
                if(CMAKE_HOST_WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "FIRST")
                    find_program(
                        _${_PYTHON_PREFIX}_COMPILER
                        NAMES ${_${_PYTHON_PREFIX}_COMPILER_NAMES} NAMES_PER_DIR
                        HINTS ${_${_PYTHON_PREFIX}_IRON_ROOT} ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                    _python_validate_compiler(${_${_PYTHON_PREFIX}_VERSION} EXACT)
                    if(_${_PYTHON_PREFIX}_COMPILER)
                        break()
                    endif()
                endif()

                # try using HINTS
                find_program(
                    _${_PYTHON_PREFIX}_COMPILER
                    NAMES ${_${_PYTHON_PREFIX}_COMPILER_NAMES} NAMES_PER_DIR
                    HINTS ${_${_PYTHON_PREFIX}_IRON_ROOT} ${_${_PYTHON_PREFIX}_HINTS}
                    PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                    NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                _python_validate_compiler(${_${_PYTHON_PREFIX}_VERSION} EXACT)
                if(_${_PYTHON_PREFIX}_COMPILER)
                    break()
                endif()

                # Apple frameworks handling
                if(CMAKE_HOST_APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL "LAST")
                    find_program(
                        _${_PYTHON_PREFIX}_COMPILER
                        NAMES ${_${_PYTHON_PREFIX}_COMPILER_NAMES} NAMES_PER_DIR
                        PATHS ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_DEFAULT_PATH)
                    _python_validate_compiler(${_${_PYTHON_PREFIX}_VERSION} EXACT)
                    if(_${_PYTHON_PREFIX}_COMPILER)
                        break()
                    endif()
                endif()
                # Windows registry
                if(CMAKE_HOST_WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "LAST")
                    find_program(
                        _${_PYTHON_PREFIX}_COMPILER
                        NAMES ${_${_PYTHON_PREFIX}_COMPILER_NAMES} NAMES_PER_DIR
                        PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_DEFAULT_PATH)
                    _python_validate_compiler(${_${_PYTHON_PREFIX}_VERSION} EXACT)
                    if(_${_PYTHON_PREFIX}_COMPILER)
                        break()
                    endif()
                endif()
            endforeach()

            # no specific version found, re-try in standard paths
            _python_get_names(
                _${_PYTHON_PREFIX}_COMPILER_NAMES IMPLEMENTATIONS IronPython VERSION
                ${_${_PYTHON_PREFIX}_FIND_VERSIONS} COMPILER)
            _python_get_path_suffixes(
                _${_PYTHON_PREFIX}_PATH_SUFFIXES IMPLEMENTATIONS IronPython VERSION
                ${_${_PYTHON_PREFIX}_FIND_VERSIONS} COMPILER)
            find_program(
                _${_PYTHON_PREFIX}_COMPILER
                NAMES ${_${_PYTHON_PREFIX}_COMPILER_NAMES}
                HINTS ${_${_PYTHON_PREFIX}_IRON_ROOT} ${_${_PYTHON_PREFIX}_HINTS}
                PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES})
        endif()
    endif()

    set(${_PYTHON_PREFIX}_COMPILER "${_${_PYTHON_PREFIX}_COMPILER}")

    if(_${_PYTHON_PREFIX}_COMPILER)
        # retrieve python environment version from compiler
        _python_get_launcher(_${_PYTHON_PREFIX}_COMPILER_LAUNCHER COMPILER)
        set(_${_PYTHON_PREFIX}_VERSION_DIR
            "${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/PythonCompilerVersion.dir"
            )
        file(
            WRITE "${_${_PYTHON_PREFIX}_VERSION_DIR}/version.py"
            "import sys; sys.stdout.write('.'.join([str(x) for x in sys.version_info[:3]]))\n"
            )
        execute_process(
            COMMAND
                ${_${_PYTHON_PREFIX}_COMPILER_LAUNCHER} "${_${_PYTHON_PREFIX}_COMPILER}"
                ${_${_PYTHON_PREFIX}_IRON_PYTHON_COMPILER_ARCH_FLAGS} /target:exe /embed
                "${_${_PYTHON_PREFIX}_VERSION_DIR}/version.py"
            WORKING_DIRECTORY "${_${_PYTHON_PREFIX}_VERSION_DIR}"
            OUTPUT_QUIET ERROR_QUIET)
        get_filename_component(_${_PYTHON_PREFIX}_IR_DIR "${_${_PYTHON_PREFIX}_COMPILER}"
                               DIRECTORY)
        execute_process(
            COMMAND
                "${CMAKE_COMMAND}" -E env "MONO_PATH=${_${_PYTHON_PREFIX}_IR_DIR}"
                ${${_PYTHON_PREFIX}_DOTNET_LAUNCHER}
                "${_${_PYTHON_PREFIX}_VERSION_DIR}/version.exe"
            WORKING_DIRECTORY "${_${_PYTHON_PREFIX}_VERSION_DIR}"
            RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
            OUTPUT_VARIABLE _${_PYTHON_PREFIX}_VERSION
            ERROR_QUIET)
        if(NOT _${_PYTHON_PREFIX}_RESULT)
            set(_${_PYTHON_PREFIX}_COMPILER_USABLE TRUE)
            string(REGEX MATCHALL "[0-9]+" _${_PYTHON_PREFIX}_VERSIONS
                         "${_${_PYTHON_PREFIX}_VERSION}")
            list(GET _${_PYTHON_PREFIX}_VERSIONS 0 _${_PYTHON_PREFIX}_VERSION_MAJOR)
            list(GET _${_PYTHON_PREFIX}_VERSIONS 1 _${_PYTHON_PREFIX}_VERSION_MINOR)
            list(GET _${_PYTHON_PREFIX}_VERSIONS 2 _${_PYTHON_PREFIX}_VERSION_PATCH)

            if(NOT ${_PYTHON_PREFIX}_Interpreter_FOUND)
                # set public version information
                set(${_PYTHON_PREFIX}_VERSION ${_${_PYTHON_PREFIX}_VERSION})
                set(${_PYTHON_PREFIX}_VERSION_MAJOR ${_${_PYTHON_PREFIX}_VERSION_MAJOR})
                set(${_PYTHON_PREFIX}_VERSION_MINOR ${_${_PYTHON_PREFIX}_VERSION_MINOR})
                set(${_PYTHON_PREFIX}_VERSION_PATCH ${_${_PYTHON_PREFIX}_VERSION_PATCH})
            endif()
        else()
            # compiler not usable
            set(_${_PYTHON_PREFIX}_COMPILER_USABLE FALSE)
            set(_${_PYTHON_PREFIX}_Compiler_REASON_FAILURE
                "Cannot run the compiler \"${_${_PYTHON_PREFIX}_COMPILER}\"")
        endif()
        file(REMOVE_RECURSE "${_${_PYTHON_PREFIX}_VERSION_DIR}")
    endif()

    if(_${_PYTHON_PREFIX}_COMPILER AND _${_PYTHON_PREFIX}_COMPILER_USABLE)
        if(${_PYTHON_PREFIX}_Interpreter_FOUND)
            # Compiler must be compatible with interpreter
            if("${_${_PYTHON_PREFIX}_VERSION_MAJOR}.${_${_PYTHON_PREFIX}_VERSION_MINOR}"
               VERSION_EQUAL
               "${${_PYTHON_PREFIX}_VERSION_MAJOR}.${${_PYTHON_PREFIX}_VERSION_MINOR}")
                set(${_PYTHON_PREFIX}_Compiler_FOUND TRUE)
            endif()
        elseif(${_PYTHON_PREFIX}_VERSION_MAJOR VERSION_EQUAL
               _${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR)
            set(${_PYTHON_PREFIX}_Compiler_FOUND TRUE)
            # Use compiler version for future searches to ensure consistency
            set(_${_PYTHON_PREFIX}_FIND_VERSIONS
                ${${_PYTHON_PREFIX}_VERSION_MAJOR}.${${_PYTHON_PREFIX}_VERSION_MINOR})
        endif()
    endif()

    if(${_PYTHON_PREFIX}_Compiler_FOUND)
        unset(_${_PYTHON_PREFIX}_Compiler_REASON_FAILURE)

        # compute and save compiler signature
        string(MD5 __${_PYTHON_PREFIX}_COMPILER_SIGNATURE
                   "${_${_PYTHON_PREFIX}_SIGNATURE}:${_${_PYTHON_PREFIX}_COMPILER}")
        set(_${_PYTHON_PREFIX}_COMPILER_SIGNATURE
            "${__${_PYTHON_PREFIX}_COMPILER_SIGNATURE}"
            CACHE INTERNAL "")

        set(${_PYTHON_PREFIX}_COMPILER_ID IronPython)
    else()
        unset(_${_PYTHON_PREFIX}_COMPILER_SIGNATURE CACHE)
        unset(${_PYTHON_PREFIX}_COMPILER_ID)
    endif()

    if(${_PYTHON_PREFIX}_ARTIFACTS_INTERACTIVE)
        set(${_PYTHON_PREFIX}_COMPILER
            "${_${_PYTHON_PREFIX}_COMPILER}"
            CACHE FILEPATH "${_PYTHON_PREFIX} Compiler")
    endif()

    _python_mark_as_internal(_${_PYTHON_PREFIX}_COMPILER
                             _${_PYTHON_PREFIX}_COMPILER_SIGNATURE)
endif()

# third step, search for the development artifacts
if(${_PYTHON_PREFIX}_FIND_REQUIRED_Development.Module)
    if("LIBRARY" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_MODULE_ARTIFACTS)
        list(APPEND _${_PYTHON_PREFIX}_REQUIRED_VARS ${_PYTHON_PREFIX}_LIBRARIES)
    endif()
    if("INCLUDE_DIR" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_MODULE_ARTIFACTS)
        list(APPEND _${_PYTHON_PREFIX}_REQUIRED_VARS ${_PYTHON_PREFIX}_INCLUDE_DIRS)
    endif()
endif()
if(${_PYTHON_PREFIX}_FIND_REQUIRED_Development.Embed)
    if("LIBRARY" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_EMBED_ARTIFACTS)
        list(APPEND _${_PYTHON_PREFIX}_REQUIRED_VARS ${_PYTHON_PREFIX}_LIBRARIES)
    endif()
    if("INCLUDE_DIR" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_EMBED_ARTIFACTS)
        list(APPEND _${_PYTHON_PREFIX}_REQUIRED_VARS ${_PYTHON_PREFIX}_INCLUDE_DIRS)
    endif()
endif()
list(REMOVE_DUPLICATES _${_PYTHON_PREFIX}_REQUIRED_VARS)
# Development environment is not compatible with IronPython interpreter
if(("Development.Module" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS
    OR "Development.Embed" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS)
   AND ((${_PYTHON_PREFIX}_Interpreter_FOUND AND NOT ${_PYTHON_PREFIX}_INTERPRETER_ID
                                                 STREQUAL "IronPython")
        OR NOT ${_PYTHON_PREFIX}_Interpreter_FOUND))
    if(${_PYTHON_PREFIX}_Interpreter_FOUND)
        # reduce possible implementations to the interpreter one
        if(${_PYTHON_PREFIX}_INTERPRETER_ID STREQUAL "PyPy")
            set(_${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS "PyPy")
        else()
            set(_${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS "CPython")
        endif()
    else()
        list(REMOVE_ITEM _${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS "IronPython")
    endif()
    if("LIBRARY" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_ARTIFACTS)
        list(APPEND _${_PYTHON_PREFIX}_CACHED_VARS _${_PYTHON_PREFIX}_LIBRARY_RELEASE
             _${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE _${_PYTHON_PREFIX}_LIBRARY_DEBUG
             _${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DEBUG)
    endif()
    if("INCLUDE_DIR" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_ARTIFACTS)
        list(APPEND _${_PYTHON_PREFIX}_CACHED_VARS _${_PYTHON_PREFIX}_INCLUDE_DIR)
    endif()

    _python_check_development_signature(Module)
    _python_check_development_signature(Embed)

    if(DEFINED ${_PYTHON_PREFIX}_LIBRARY AND IS_ABSOLUTE "${${_PYTHON_PREFIX}_LIBRARY}")
        set(_${_PYTHON_PREFIX}_LIBRARY_RELEASE
            "${${_PYTHON_PREFIX}_LIBRARY}"
            CACHE INTERNAL "")
        unset(_${_PYTHON_PREFIX}_LIBRARY_DEBUG CACHE)
        unset(_${_PYTHON_PREFIX}_INCLUDE_DIR CACHE)
    endif()
    if(DEFINED ${_PYTHON_PREFIX}_INCLUDE_DIR AND IS_ABSOLUTE
                                                 "${${_PYTHON_PREFIX}_INCLUDE_DIR}")
        set(_${_PYTHON_PREFIX}_INCLUDE_DIR
            "${${_PYTHON_PREFIX}_INCLUDE_DIR}"
            CACHE INTERNAL "")
    endif()

    # Support preference of static libs by adjusting CMAKE_FIND_LIBRARY_SUFFIXES
    unset(_${_PYTHON_PREFIX}_CMAKE_FIND_LIBRARY_SUFFIXES)
    if(DEFINED ${_PYTHON_PREFIX}_USE_STATIC_LIBS AND NOT WIN32)
        set(_${_PYTHON_PREFIX}_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})
        if(${_PYTHON_PREFIX}_USE_STATIC_LIBS)
            set(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_STATIC_LIBRARY_SUFFIX})
        else()
            list(REMOVE_ITEM CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_STATIC_LIBRARY_SUFFIX})
        endif()
    endif()

    if(NOT _${_PYTHON_PREFIX}_LIBRARY_RELEASE OR NOT _${_PYTHON_PREFIX}_INCLUDE_DIR)
        # if python interpreter is found, use it to look-up for artifacts to ensure
        # consistency between interpreter and development environments. If not, try to
        # locate a compatible config tool
        if((NOT ${_PYTHON_PREFIX}_Interpreter_FOUND OR CMAKE_CROSSCOMPILING)
           AND "CPython" IN_LIST _${_PYTHON_PREFIX}_FIND_IMPLEMENTATIONS)
            set(_${_PYTHON_PREFIX}_HINTS "${${_PYTHON_PREFIX}_ROOT_DIR}" ENV
                                         ${_PYTHON_PREFIX}_ROOT_DIR)
            unset(_${_PYTHON_PREFIX}_VIRTUALENV_PATHS)
            if(_${_PYTHON_PREFIX}_FIND_VIRTUALENV MATCHES "^(FIRST|ONLY)$")
                set(_${_PYTHON_PREFIX}_VIRTUALENV_PATHS ENV VIRTUAL_ENV ENV CONDA_PREFIX)
            endif()

            if(_${_PYTHON_PREFIX}_FIND_STRATEGY STREQUAL "LOCATION")
                _python_get_names(_${_PYTHON_PREFIX}_CONFIG_NAMES VERSION
                                  ${_${_PYTHON_PREFIX}_FIND_VERSIONS} POSIX CONFIG)
                # Framework Paths
                _python_get_frameworks(_${_PYTHON_PREFIX}_FRAMEWORK_PATHS VERSION
                                       ${_${_PYTHON_PREFIX}_FIND_VERSIONS})

                # Apple frameworks handling
                if(CMAKE_HOST_APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL
                                        "FIRST")
                    find_program(
                        _${_PYTHON_PREFIX}_CONFIG
                        NAMES ${_${_PYTHON_PREFIX}_CONFIG_NAMES} NAMES_PER_DIR
                        HINTS ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ${_${_PYTHON_PREFIX}_VIRTUALENV_PATHS}
                              ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                        PATH_SUFFIXES bin
                        NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH
                        NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                endif()

                find_program(
                    _${_PYTHON_PREFIX}_CONFIG
                    NAMES ${_${_PYTHON_PREFIX}_CONFIG_NAMES} NAMES_PER_DIR
                    HINTS ${_${_PYTHON_PREFIX}_HINTS}
                    PATHS ${_${_PYTHON_PREFIX}_VIRTUALENV_PATHS}
                    PATH_SUFFIXES bin)

                # Apple frameworks handling
                if(CMAKE_HOST_APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL "LAST")
                    find_program(
                        _${_PYTHON_PREFIX}_CONFIG
                        NAMES ${_${_PYTHON_PREFIX}_CONFIG_NAMES} NAMES_PER_DIR
                        PATHS ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                        PATH_SUFFIXES bin
                        NO_DEFAULT_PATH)
                endif()

                if(_${_PYTHON_PREFIX}_CONFIG)
                    execute_process(
                        COMMAND "${_${_PYTHON_PREFIX}_CONFIG}" --help
                        RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                        OUTPUT_VARIABLE __${_PYTHON_PREFIX}_HELP
                        ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
                    if(_${_PYTHON_PREFIX}_RESULT)
                        # assume config tool is not usable
                        unset(_${_PYTHON_PREFIX}_CONFIG CACHE)
                    endif()
                endif()

                if(_${_PYTHON_PREFIX}_CONFIG)
                    execute_process(
                        COMMAND "${_${_PYTHON_PREFIX}_CONFIG}" --abiflags
                        RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                        OUTPUT_VARIABLE __${_PYTHON_PREFIX}_ABIFLAGS
                        ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
                    if(_${_PYTHON_PREFIX}_RESULT)
                        # assume ABI is not supported
                        set(__${_PYTHON_PREFIX}_ABIFLAGS "")
                    endif()
                    if(DEFINED _${_PYTHON_PREFIX}_FIND_ABI
                       AND NOT __${_PYTHON_PREFIX}_ABIFLAGS IN_LIST
                           _${_PYTHON_PREFIX}_ABIFLAGS)
                        # Wrong ABI
                        unset(_${_PYTHON_PREFIX}_CONFIG CACHE)
                    endif()
                endif()

                if(_${_PYTHON_PREFIX}_CONFIG AND DEFINED CMAKE_LIBRARY_ARCHITECTURE)
                    # check that config tool match library architecture
                    execute_process(
                        COMMAND "${_${_PYTHON_PREFIX}_CONFIG}" --configdir
                        RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                        OUTPUT_VARIABLE _${_PYTHON_PREFIX}_CONFIGDIR
                        ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
                    if(_${_PYTHON_PREFIX}_RESULT)
                        unset(_${_PYTHON_PREFIX}_CONFIG CACHE)
                    else()
                        string(FIND "${_${_PYTHON_PREFIX}_CONFIGDIR}"
                                    "${CMAKE_LIBRARY_ARCHITECTURE}"
                                    _${_PYTHON_PREFIX}_RESULT)
                        if(_${_PYTHON_PREFIX}_RESULT EQUAL -1)
                            unset(_${_PYTHON_PREFIX}_CONFIG CACHE)
                        endif()
                    endif()
                endif()
            else()
                foreach(_${_PYTHON_PREFIX}_VERSION IN
                        LISTS _${_PYTHON_PREFIX}_FIND_VERSIONS)
                    # try to use pythonX.Y-config tool
                    _python_get_names(_${_PYTHON_PREFIX}_CONFIG_NAMES VERSION
                                      ${_${_PYTHON_PREFIX}_VERSION} POSIX CONFIG)

                    # Framework Paths
                    _python_get_frameworks(_${_PYTHON_PREFIX}_FRAMEWORK_PATHS VERSION
                                           ${_${_PYTHON_PREFIX}_VERSION})

                    # Apple frameworks handling
                    if(CMAKE_HOST_APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL
                                            "FIRST")
                        find_program(
                            _${_PYTHON_PREFIX}_CONFIG
                            NAMES ${_${_PYTHON_PREFIX}_CONFIG_NAMES} NAMES_PER_DIR
                            HINTS ${_${_PYTHON_PREFIX}_HINTS}
                            PATHS ${_${_PYTHON_PREFIX}_VIRTUALENV_PATHS}
                                  ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                            PATH_SUFFIXES bin
                            NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH
                            NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                    endif()

                    find_program(
                        _${_PYTHON_PREFIX}_CONFIG
                        NAMES ${_${_PYTHON_PREFIX}_CONFIG_NAMES} NAMES_PER_DIR
                        HINTS ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ${_${_PYTHON_PREFIX}_VIRTUALENV_PATHS}
                        PATH_SUFFIXES bin)

                    # Apple frameworks handling
                    if(CMAKE_HOST_APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL
                                            "LAST")
                        find_program(
                            _${_PYTHON_PREFIX}_CONFIG
                            NAMES ${_${_PYTHON_PREFIX}_CONFIG_NAMES} NAMES_PER_DIR
                            PATHS ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                            PATH_SUFFIXES bin
                            NO_DEFAULT_PATH)
                    endif()

                    unset(_${_PYTHON_PREFIX}_CONFIG_NAMES)

                    if(_${_PYTHON_PREFIX}_CONFIG)
                        execute_process(
                            COMMAND "${_${_PYTHON_PREFIX}_CONFIG}" --help
                            RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                            OUTPUT_VARIABLE __${_PYTHON_PREFIX}_HELP
                            ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
                        if(_${_PYTHON_PREFIX}_RESULT)
                            # assume config tool is not usable
                            unset(_${_PYTHON_PREFIX}_CONFIG CACHE)
                        endif()
                    endif()

                    if(NOT _${_PYTHON_PREFIX}_CONFIG)
                        continue()
                    endif()

                    execute_process(
                        COMMAND "${_${_PYTHON_PREFIX}_CONFIG}" --abiflags
                        RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                        OUTPUT_VARIABLE __${_PYTHON_PREFIX}_ABIFLAGS
                        ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
                    if(_${_PYTHON_PREFIX}_RESULT)
                        # assume ABI is not supported
                        set(__${_PYTHON_PREFIX}_ABIFLAGS "")
                    endif()
                    if(DEFINED _${_PYTHON_PREFIX}_FIND_ABI
                       AND NOT __${_PYTHON_PREFIX}_ABIFLAGS IN_LIST
                           _${_PYTHON_PREFIX}_ABIFLAGS)
                        # Wrong ABI
                        unset(_${_PYTHON_PREFIX}_CONFIG CACHE)
                        continue()
                    endif()

                    if(_${_PYTHON_PREFIX}_CONFIG AND DEFINED CMAKE_LIBRARY_ARCHITECTURE)
                        # check that config tool match library architecture
                        execute_process(
                            COMMAND "${_${_PYTHON_PREFIX}_CONFIG}" --configdir
                            RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                            OUTPUT_VARIABLE _${_PYTHON_PREFIX}_CONFIGDIR
                            ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
                        if(_${_PYTHON_PREFIX}_RESULT)
                            unset(_${_PYTHON_PREFIX}_CONFIG CACHE)
                            continue()
                        endif()
                        string(FIND "${_${_PYTHON_PREFIX}_CONFIGDIR}"
                                    "${CMAKE_LIBRARY_ARCHITECTURE}"
                                    _${_PYTHON_PREFIX}_RESULT)
                        if(_${_PYTHON_PREFIX}_RESULT EQUAL -1)
                            unset(_${_PYTHON_PREFIX}_CONFIG CACHE)
                            continue()
                        endif()
                    endif()

                    if(_${_PYTHON_PREFIX}_CONFIG)
                        break()
                    endif()
                endforeach()
            endif()
        endif()
    endif()

    if("LIBRARY" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_ARTIFACTS)
        if(NOT _${_PYTHON_PREFIX}_LIBRARY_RELEASE)
            if((${_PYTHON_PREFIX}_Interpreter_FOUND AND NOT CMAKE_CROSSCOMPILING)
               OR _${_PYTHON_PREFIX}_CONFIG)
                # retrieve root install directory
                _python_get_config_var(_${_PYTHON_PREFIX}_PREFIX PREFIX)

                # enforce current ABI
                _python_get_config_var(_${_PYTHON_PREFIX}_ABIFLAGS ABIFLAGS)

                set(_${_PYTHON_PREFIX}_HINTS "${_${_PYTHON_PREFIX}_PREFIX}")

                # retrieve library compute some paths and artifact names
                if(_${_PYTHON_PREFIX}_CONFIG)
                    string(
                        REGEX
                        REPLACE "^.+python([0-9.]+)[a-z]*-config" "\\1"
                                _${_PYTHON_PREFIX}_VERSION "${_${_PYTHON_PREFIX}_CONFIG}")
                else()
                    set(_${_PYTHON_PREFIX}_VERSION
                        "${${_PYTHON_PREFIX}_VERSION_MAJOR}.${${_PYTHON_PREFIX}_VERSION_MINOR}"
                        )
                endif()
                _python_get_path_suffixes(_${_PYTHON_PREFIX}_PATH_SUFFIXES VERSION
                                          ${_${_PYTHON_PREFIX}_VERSION} LIBRARY)
                _python_get_names(_${_PYTHON_PREFIX}_LIB_NAMES VERSION
                                  ${_${_PYTHON_PREFIX}_VERSION} WIN32 POSIX LIBRARY)

                _python_get_config_var(_${_PYTHON_PREFIX}_CONFIGDIR CONFIGDIR)
                list(APPEND _${_PYTHON_PREFIX}_HINTS "${_${_PYTHON_PREFIX}_CONFIGDIR}")

                list(APPEND _${_PYTHON_PREFIX}_HINTS "${${_PYTHON_PREFIX}_ROOT_DIR}" ENV
                     ${_PYTHON_PREFIX}_ROOT_DIR)

                find_library(
                    _${_PYTHON_PREFIX}_LIBRARY_RELEASE
                    NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES} NAMES_PER_DIR
                    HINTS ${_${_PYTHON_PREFIX}_HINTS}
                    PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                    NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
            endif()

            # Rely on HINTS and standard paths if interpreter or config tool failed to
            # locate artifacts
            if(NOT _${_PYTHON_PREFIX}_LIBRARY_RELEASE)
                set(_${_PYTHON_PREFIX}_HINTS "${${_PYTHON_PREFIX}_ROOT_DIR}" ENV
                                             ${_PYTHON_PREFIX}_ROOT_DIR)

                unset(_${_PYTHON_PREFIX}_VIRTUALENV_PATHS)
                if(_${_PYTHON_PREFIX}_FIND_VIRTUALENV MATCHES "^(FIRST|ONLY)$")
                    set(_${_PYTHON_PREFIX}_VIRTUALENV_PATHS ENV VIRTUAL_ENV ENV
                                                            CONDA_PREFIX)
                endif()

                if(_${_PYTHON_PREFIX}_FIND_STRATEGY STREQUAL "LOCATION")
                    # library names
                    _python_get_names(
                        _${_PYTHON_PREFIX}_LIB_NAMES VERSION
                        ${_${_PYTHON_PREFIX}_FIND_VERSIONS} WIN32 POSIX LIBRARY)
                    _python_get_names(_${_PYTHON_PREFIX}_LIB_NAMES_DEBUG VERSION
                                      ${_${_PYTHON_PREFIX}_FIND_VERSIONS} WIN32 DEBUG)
                    # Paths suffixes
                    _python_get_path_suffixes(_${_PYTHON_PREFIX}_PATH_SUFFIXES VERSION
                                              ${_${_PYTHON_PREFIX}_FIND_VERSIONS} LIBRARY)

                    # Framework Paths
                    _python_get_frameworks(_${_PYTHON_PREFIX}_FRAMEWORK_PATHS VERSION
                                           ${_${_PYTHON_PREFIX}_LIB_FIND_VERSIONS})
                    # Registry Paths
                    _python_get_registries(_${_PYTHON_PREFIX}_REGISTRY_PATHS VERSION
                                           ${_${_PYTHON_PREFIX}_FIND_VERSIONS})

                    if(APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL "FIRST")
                        find_library(
                            _${_PYTHON_PREFIX}_LIBRARY_RELEASE
                            NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES} NAMES_PER_DIR
                            HINTS ${_${_PYTHON_PREFIX}_HINTS}
                            PATHS ${_${_PYTHON_PREFIX}_VIRTUALENV_PATHS}
                                  ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                            PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                            NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH
                            NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                    endif()

                    if(WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "FIRST")
                        find_library(
                            _${_PYTHON_PREFIX}_LIBRARY_RELEASE
                            NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES} NAMES_PER_DIR
                            HINTS ${_${_PYTHON_PREFIX}_HINTS}
                            PATHS ${_${_PYTHON_PREFIX}_VIRTUALENV_PATHS}
                                  ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                            PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                            NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                    endif()

                    # search in HINTS locations
                    find_library(
                        _${_PYTHON_PREFIX}_LIBRARY_RELEASE
                        NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES} NAMES_PER_DIR
                        HINTS ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ${_${_PYTHON_PREFIX}_VIRTUALENV_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)

                    if(APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL "LAST")
                        set(__${_PYTHON_PREFIX}_FRAMEWORK_PATHS
                            ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS})
                    else()
                        unset(__${_PYTHON_PREFIX}_FRAMEWORK_PATHS)
                    endif()

                    if(WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "LAST")
                        set(__${_PYTHON_PREFIX}_REGISTRY_PATHS
                            ${_${_PYTHON_PREFIX}_REGISTRY_PATHS})
                    else()
                        unset(__${_PYTHON_PREFIX}_REGISTRY_PATHS)
                    endif()

                    # search in all default paths
                    find_library(
                        _${_PYTHON_PREFIX}_LIBRARY_RELEASE
                        NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES} NAMES_PER_DIR
                        PATHS ${__${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                              ${__${_PYTHON_PREFIX}_REGISTRY_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES})
                else()
                    foreach(_${_PYTHON_PREFIX}_LIB_VERSION IN
                            LISTS _${_PYTHON_PREFIX}_FIND_VERSIONS)
                        _python_get_names(
                            _${_PYTHON_PREFIX}_LIB_NAMES VERSION
                            ${_${_PYTHON_PREFIX}_LIB_VERSION} WIN32 POSIX LIBRARY)
                        _python_get_names(_${_PYTHON_PREFIX}_LIB_NAMES_DEBUG VERSION
                                          ${_${_PYTHON_PREFIX}_LIB_VERSION} WIN32 DEBUG)

                        _python_get_frameworks(_${_PYTHON_PREFIX}_FRAMEWORK_PATHS VERSION
                                               ${_${_PYTHON_PREFIX}_LIB_VERSION})
                        _python_get_registries(_${_PYTHON_PREFIX}_REGISTRY_PATHS VERSION
                                               ${_${_PYTHON_PREFIX}_LIB_VERSION})

                        _python_get_path_suffixes(
                            _${_PYTHON_PREFIX}_PATH_SUFFIXES VERSION
                            ${_${_PYTHON_PREFIX}_LIB_VERSION} LIBRARY)

                        if(APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL "FIRST")
                            find_library(
                                _${_PYTHON_PREFIX}_LIBRARY_RELEASE
                                NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES} NAMES_PER_DIR
                                HINTS ${_${_PYTHON_PREFIX}_HINTS}
                                PATHS ${_${_PYTHON_PREFIX}_VIRTUALENV_PATHS}
                                      ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                                PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                                NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH
                                NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                        endif()

                        if(WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "FIRST")
                            find_library(
                                _${_PYTHON_PREFIX}_LIBRARY_RELEASE
                                NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES} NAMES_PER_DIR
                                HINTS ${_${_PYTHON_PREFIX}_HINTS}
                                PATHS ${_${_PYTHON_PREFIX}_VIRTUALENV_PATHS}
                                      ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                                PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                                NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                        endif()

                        # search in HINTS locations
                        find_library(
                            _${_PYTHON_PREFIX}_LIBRARY_RELEASE
                            NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES} NAMES_PER_DIR
                            HINTS ${_${_PYTHON_PREFIX}_HINTS}
                            PATHS ${_${_PYTHON_PREFIX}_VIRTUALENV_PATHS}
                            PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                            NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)

                        if(APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL "LAST")
                            set(__${_PYTHON_PREFIX}_FRAMEWORK_PATHS
                                ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS})
                        else()
                            unset(__${_PYTHON_PREFIX}_FRAMEWORK_PATHS)
                        endif()

                        if(WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "LAST")
                            set(__${_PYTHON_PREFIX}_REGISTRY_PATHS
                                ${_${_PYTHON_PREFIX}_REGISTRY_PATHS})
                        else()
                            unset(__${_PYTHON_PREFIX}_REGISTRY_PATHS)
                        endif()

                        # search in all default paths
                        find_library(
                            _${_PYTHON_PREFIX}_LIBRARY_RELEASE
                            NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES} NAMES_PER_DIR
                            PATHS ${__${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                                  ${__${_PYTHON_PREFIX}_REGISTRY_PATHS}
                            PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES})

                        if(_${_PYTHON_PREFIX}_LIBRARY_RELEASE)
                            break()
                        endif()
                    endforeach()
                endif()
            endif()
        endif()

        # finalize library version information
        _python_get_version(LIBRARY PREFIX _${_PYTHON_PREFIX}_)
        if(_${_PYTHON_PREFIX}_VERSION EQUAL
           "${_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR}")
            # not able to extract full version from library name
            if(${_PYTHON_PREFIX}_Interpreter_FOUND)
                # update from interpreter
                set(_${_PYTHON_PREFIX}_VERSION ${${_PYTHON_PREFIX}_VERSION})
                set(_${_PYTHON_PREFIX}_VERSION_MAJOR ${${_PYTHON_PREFIX}_VERSION_MAJOR})
                set(_${_PYTHON_PREFIX}_VERSION_MINOR ${${_PYTHON_PREFIX}_VERSION_MINOR})
                set(_${_PYTHON_PREFIX}_VERSION_PATCH ${${_PYTHON_PREFIX}_VERSION_PATCH})
            endif()
        endif()

        set(${_PYTHON_PREFIX}_LIBRARY_RELEASE "${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}")

        if(_${_PYTHON_PREFIX}_LIBRARY_RELEASE AND NOT EXISTS
                                                  "${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}")
            set(_${_PYTHON_PREFIX}_Development_REASON_FAILURE
                "Cannot find the library \"${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}\"")
            set_property(CACHE _${_PYTHON_PREFIX}_LIBRARY_RELEASE
                         PROPERTY VALUE "${_PYTHON_PREFIX}_LIBRARY_RELEASE-NOTFOUND")
        endif()

        set(_${_PYTHON_PREFIX}_HINTS "${${_PYTHON_PREFIX}_ROOT_DIR}" ENV
                                     ${_PYTHON_PREFIX}_ROOT_DIR)

        if(WIN32 AND _${_PYTHON_PREFIX}_LIBRARY_RELEASE)
            # search for debug library use release library location as a hint
            _python_get_names(_${_PYTHON_PREFIX}_LIB_NAMES_DEBUG VERSION
                              ${_${_PYTHON_PREFIX}_VERSION} WIN32 DEBUG)
            get_filename_component(_${_PYTHON_PREFIX}_PATH
                                   "${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}" DIRECTORY)
            find_library(
                _${_PYTHON_PREFIX}_LIBRARY_DEBUG
                NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES_DEBUG} NAMES_PER_DIR
                HINTS "${_${_PYTHON_PREFIX}_PATH}" ${_${_PYTHON_PREFIX}_HINTS}
                NO_DEFAULT_PATH)
            # second try including CMAKE variables to catch-up non conventional layouts
            find_library(
                _${_PYTHON_PREFIX}_LIBRARY_DEBUG
                NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES_DEBUG} NAMES_PER_DIR
                NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
        endif()

        # retrieve runtime libraries
        if(_${_PYTHON_PREFIX}_LIBRARY_RELEASE)
            _python_get_names(_${_PYTHON_PREFIX}_LIB_NAMES VERSION
                              ${_${_PYTHON_PREFIX}_VERSION} WIN32 POSIX LIBRARY)
            get_filename_component(_${_PYTHON_PREFIX}_PATH
                                   "${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}" DIRECTORY)
            get_filename_component(_${_PYTHON_PREFIX}_PATH2 "${_${_PYTHON_PREFIX}_PATH}"
                                   DIRECTORY)
            _python_find_runtime_library(
                _${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE
                NAMES
                ${_${_PYTHON_PREFIX}_LIB_NAMES}
                NAMES_PER_DIR
                HINTS
                "${_${_PYTHON_PREFIX}_PATH}"
                "${_${_PYTHON_PREFIX}_PATH2}"
                ${_${_PYTHON_PREFIX}_HINTS}
                PATH_SUFFIXES
                bin)
        endif()
        if(_${_PYTHON_PREFIX}_LIBRARY_DEBUG)
            _python_get_names(_${_PYTHON_PREFIX}_LIB_NAMES_DEBUG VERSION
                              ${_${_PYTHON_PREFIX}_VERSION} WIN32 DEBUG)
            get_filename_component(_${_PYTHON_PREFIX}_PATH
                                   "${_${_PYTHON_PREFIX}_LIBRARY_DEBUG}" DIRECTORY)
            get_filename_component(_${_PYTHON_PREFIX}_PATH2 "${_${_PYTHON_PREFIX}_PATH}"
                                   DIRECTORY)
            _python_find_runtime_library(
                _${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DEBUG
                NAMES
                ${_${_PYTHON_PREFIX}_LIB_NAMES_DEBUG}
                NAMES_PER_DIR
                HINTS
                "${_${_PYTHON_PREFIX}_PATH}"
                "${_${_PYTHON_PREFIX}_PATH2}"
                ${_${_PYTHON_PREFIX}_HINTS}
                PATH_SUFFIXES
                bin)
        endif()
    endif()

    if("INCLUDE_DIR" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_ARTIFACTS)
        while(NOT _${_PYTHON_PREFIX}_INCLUDE_DIR)
            if("LIBRARY" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_ARTIFACTS
               AND NOT _${_PYTHON_PREFIX}_LIBRARY_RELEASE)
                # Don't search for include dir if no library was founded
                break()
            endif()

            if((${_PYTHON_PREFIX}_Interpreter_FOUND AND NOT CMAKE_CROSSCOMPILING)
               OR _${_PYTHON_PREFIX}_CONFIG)
                _python_get_config_var(_${_PYTHON_PREFIX}_INCLUDE_DIRS INCLUDES)

                find_path(
                    _${_PYTHON_PREFIX}_INCLUDE_DIR
                    NAMES ${_${_PYTHON_PREFIX}_INCLUDE_NAMES}
                    HINTS ${_${_PYTHON_PREFIX}_INCLUDE_DIRS}
                    NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
            endif()

            # Rely on HINTS and standard paths if interpreter or config tool failed to
            # locate artifacts
            if(NOT _${_PYTHON_PREFIX}_INCLUDE_DIR)
                unset(_${_PYTHON_PREFIX}_VIRTUALENV_PATHS)
                if(_${_PYTHON_PREFIX}_FIND_VIRTUALENV MATCHES "^(FIRST|ONLY)$")
                    set(_${_PYTHON_PREFIX}_VIRTUALENV_PATHS ENV VIRTUAL_ENV ENV
                                                            CONDA_PREFIX)
                endif()
                unset(_${_PYTHON_PREFIX}_INCLUDE_HINTS)

                if(_${_PYTHON_PREFIX}_LIBRARY_RELEASE)
                    # Use the library's install prefix as a hint
                    if(_${_PYTHON_PREFIX}_LIBRARY_RELEASE MATCHES
                       "^(.+/Frameworks/Python.framework/Versions/[0-9.]+)")
                        list(APPEND _${_PYTHON_PREFIX}_INCLUDE_HINTS "${CMAKE_MATCH_1}")
                    elseif(_${_PYTHON_PREFIX}_LIBRARY_RELEASE MATCHES
                           "^(.+)/lib(64|32)?/python[0-9.]+/config")
                        list(APPEND _${_PYTHON_PREFIX}_INCLUDE_HINTS "${CMAKE_MATCH_1}")
                    elseif(DEFINED CMAKE_LIBRARY_ARCHITECTURE
                           AND ${_${_PYTHON_PREFIX}_LIBRARY_RELEASE} MATCHES
                               "^(.+)/lib/${CMAKE_LIBRARY_ARCHITECTURE}")
                        list(APPEND _${_PYTHON_PREFIX}_INCLUDE_HINTS "${CMAKE_MATCH_1}")
                    else()
                        # assume library is in a directory under root
                        get_filename_component(
                            _${_PYTHON_PREFIX}_PREFIX
                            "${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}" DIRECTORY)
                        get_filename_component(_${_PYTHON_PREFIX}_PREFIX
                                               "${_${_PYTHON_PREFIX}_PREFIX}" DIRECTORY)
                        list(APPEND _${_PYTHON_PREFIX}_INCLUDE_HINTS
                             "${_${_PYTHON_PREFIX}_PREFIX}")
                    endif()
                endif()

                _python_get_frameworks(_${_PYTHON_PREFIX}_FRAMEWORK_PATHS VERSION
                                       ${_${_PYTHON_PREFIX}_VERSION})
                _python_get_registries(_${_PYTHON_PREFIX}_REGISTRY_PATHS VERSION
                                       ${_${_PYTHON_PREFIX}_VERSION})
                _python_get_path_suffixes(_${_PYTHON_PREFIX}_PATH_SUFFIXES VERSION
                                          ${_${_PYTHON_PREFIX}_VERSION} INCLUDE)

                if(APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL "FIRST")
                    find_path(
                        _${_PYTHON_PREFIX}_INCLUDE_DIR
                        NAMES ${_${_PYTHON_PREFIX}_INCLUDE_NAMES}
                        HINTS ${_${_PYTHON_PREFIX}_INCLUDE_HINTS}
                              ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ${_${_PYTHON_PREFIX}_VIRTUALENV_PATHS}
                              ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_CMAKE_PATH NO_CMAKE_ENVIRONMENT_PATH
                        NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                endif()

                if(WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "FIRST")
                    find_path(
                        _${_PYTHON_PREFIX}_INCLUDE_DIR
                        NAMES ${_${_PYTHON_PREFIX}_INCLUDE_NAMES}
                        HINTS ${_${_PYTHON_PREFIX}_INCLUDE_HINTS}
                              ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ${_${_PYTHON_PREFIX}_VIRTUALENV_PATHS}
                              ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                        PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                        NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
                endif()

                if(APPLE AND _${_PYTHON_PREFIX}_FIND_FRAMEWORK STREQUAL "LAST")
                    set(__${_PYTHON_PREFIX}_FRAMEWORK_PATHS
                        ${_${_PYTHON_PREFIX}_FRAMEWORK_PATHS})
                else()
                    unset(__${_PYTHON_PREFIX}_FRAMEWORK_PATHS)
                endif()

                if(WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "LAST")
                    set(__${_PYTHON_PREFIX}_REGISTRY_PATHS
                        ${_${_PYTHON_PREFIX}_REGISTRY_PATHS})
                else()
                    unset(__${_PYTHON_PREFIX}_REGISTRY_PATHS)
                endif()

                find_path(
                    _${_PYTHON_PREFIX}_INCLUDE_DIR
                    NAMES ${_${_PYTHON_PREFIX}_INCLUDE_NAMES}
                    HINTS ${_${_PYTHON_PREFIX}_INCLUDE_HINTS} ${_${_PYTHON_PREFIX}_HINTS}
                    PATHS ${_${_PYTHON_PREFIX}_VIRTUALENV_PATHS}
                          ${__${_PYTHON_PREFIX}_FRAMEWORK_PATHS}
                          ${__${_PYTHON_PREFIX}_REGISTRY_PATHS}
                    PATH_SUFFIXES ${_${_PYTHON_PREFIX}_PATH_SUFFIXES}
                    NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_SYSTEM_PATH)
            endif()

            # search header file in standard locations
            find_path(_${_PYTHON_PREFIX}_INCLUDE_DIR
                      NAMES ${_${_PYTHON_PREFIX}_INCLUDE_NAMES})

            break()
        endwhile()

        set(${_PYTHON_PREFIX}_INCLUDE_DIRS "${_${_PYTHON_PREFIX}_INCLUDE_DIR}")

        if(_${_PYTHON_PREFIX}_INCLUDE_DIR AND NOT EXISTS
                                              "${_${_PYTHON_PREFIX}_INCLUDE_DIR}")
            set(_${_PYTHON_PREFIX}_Development_REASON_FAILURE
                "Cannot find the directory \"${_${_PYTHON_PREFIX}_INCLUDE_DIR}\"")
            set_property(CACHE _${_PYTHON_PREFIX}_INCLUDE_DIR
                         PROPERTY VALUE "${_PYTHON_PREFIX}_INCLUDE_DIR-NOTFOUND")
        endif()

        if(_${_PYTHON_PREFIX}_INCLUDE_DIR)
            # retrieve version from header file
            _python_get_version(INCLUDE PREFIX _${_PYTHON_PREFIX}_INC_)

            if(_${_PYTHON_PREFIX}_LIBRARY_RELEASE)
                if("${_${_PYTHON_PREFIX}_INC_VERSION_MAJOR}.${_${_PYTHON_PREFIX}_INC_VERSION_MINOR}"
                   VERSION_EQUAL
                   _${_PYTHON_PREFIX}_VERSION)
                    # update versioning
                    set(_${_PYTHON_PREFIX}_VERSION ${_${_PYTHON_PREFIX}_INC_VERSION})
                    set(_${_PYTHON_PREFIX}_VERSION_PATCH
                        ${_${_PYTHON_PREFIX}_INC_VERSION_PATCH})
                endif()
            else()
                set(_${_PYTHON_PREFIX}_VERSION ${_${_PYTHON_PREFIX}_INC_VERSION})
                set(_${_PYTHON_PREFIX}_VERSION_MAJOR
                    ${_${_PYTHON_PREFIX}_INC_VERSION_MAJOR})
                set(_${_PYTHON_PREFIX}_VERSION_MINOR
                    ${_${_PYTHON_PREFIX}_INC_VERSION_MINOR})
                set(_${_PYTHON_PREFIX}_VERSION_PATCH
                    ${_${_PYTHON_PREFIX}_INC_VERSION_PATCH})
            endif()
        endif()
    endif()

    if(NOT ${_PYTHON_PREFIX}_Interpreter_FOUND AND NOT ${_PYTHON_PREFIX}_Compiler_FOUND)
        # set public version information
        set(${_PYTHON_PREFIX}_VERSION ${_${_PYTHON_PREFIX}_VERSION})
        set(${_PYTHON_PREFIX}_VERSION_MAJOR ${_${_PYTHON_PREFIX}_VERSION_MAJOR})
        set(${_PYTHON_PREFIX}_VERSION_MINOR ${_${_PYTHON_PREFIX}_VERSION_MINOR})
        set(${_PYTHON_PREFIX}_VERSION_PATCH ${_${_PYTHON_PREFIX}_VERSION_PATCH})
    endif()

    # define public variables
    if("LIBRARY" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_ARTIFACTS)
        set(${_PYTHON_PREFIX}_LIBRARY_DEBUG "${_${_PYTHON_PREFIX}_LIBRARY_DEBUG}")
        _python_select_library_configurations(${_PYTHON_PREFIX})

        set(${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE
            "${_${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE}")
        set(${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DEBUG
            "${_${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DEBUG}")

        if(_${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE)
            set(${_PYTHON_PREFIX}_RUNTIME_LIBRARY
                "${_${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE}")
        elseif(_${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DEBUG)
            set(${_PYTHON_PREFIX}_RUNTIME_LIBRARY
                "${_${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DEBUG}")
        else()
            set(${_PYTHON_PREFIX}_RUNTIME_LIBRARY
                "${_PYTHON_PREFIX}_RUNTIME_LIBRARY-NOTFOUND")
        endif()

        _python_set_library_dirs(
            ${_PYTHON_PREFIX}_LIBRARY_DIRS _${_PYTHON_PREFIX}_LIBRARY_RELEASE
            _${_PYTHON_PREFIX}_LIBRARY_DEBUG)
        if(UNIX)
            if(_${_PYTHON_PREFIX}_LIBRARY_RELEASE MATCHES
               "${CMAKE_SHARED_LIBRARY_SUFFIX}$")
                set(${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DIRS
                    ${${_PYTHON_PREFIX}_LIBRARY_DIRS})
            endif()
        else()
            _python_set_library_dirs(
                ${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DIRS
                _${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE
                _${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DEBUG)
        endif()
    endif()

    if(_${_PYTHON_PREFIX}_LIBRARY_RELEASE OR _${_PYTHON_PREFIX}_INCLUDE_DIR)
        if(${_PYTHON_PREFIX}_Interpreter_FOUND OR ${_PYTHON_PREFIX}_Compiler_FOUND)
            # development environment must be compatible with interpreter/compiler
            if("${_${_PYTHON_PREFIX}_VERSION_MAJOR}.${_${_PYTHON_PREFIX}_VERSION_MINOR}"
               VERSION_EQUAL
               "${${_PYTHON_PREFIX}_VERSION_MAJOR}.${${_PYTHON_PREFIX}_VERSION_MINOR}"
               AND "${_${_PYTHON_PREFIX}_INC_VERSION_MAJOR}.${_${_PYTHON_PREFIX}_INC_VERSION_MINOR}"
                   VERSION_EQUAL
                   "${_${_PYTHON_PREFIX}_VERSION_MAJOR}.${_${_PYTHON_PREFIX}_VERSION_MINOR}"
               )
                _python_set_development_module_found(Module)
                _python_set_development_module_found(Embed)
            endif()
        elseif(
            ${_PYTHON_PREFIX}_VERSION_MAJOR VERSION_EQUAL
            _${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR
            AND "${_${_PYTHON_PREFIX}_INC_VERSION_MAJOR}.${_${_PYTHON_PREFIX}_INC_VERSION_MINOR}"
                VERSION_EQUAL
                "${_${_PYTHON_PREFIX}_VERSION_MAJOR}.${_${_PYTHON_PREFIX}_VERSION_MINOR}")
            _python_set_development_module_found(Module)
            _python_set_development_module_found(Embed)
        endif()
        if(DEFINED _${_PYTHON_PREFIX}_FIND_ABI
           AND (NOT _${_PYTHON_PREFIX}_ABI IN_LIST _${_PYTHON_PREFIX}_ABIFLAGS
                OR NOT _${_PYTHON_PREFIX}_INC_ABI IN_LIST _${_PYTHON_PREFIX}_ABIFLAGS))
            set(${_PYTHON_PREFIX}_Development.Module_FOUND FALSE)
            set(${_PYTHON_PREFIX}_Development.Embed_FOUND FALSE)
        endif()
    endif()

    if((${_PYTHON_PREFIX}_Development.Module_FOUND
        AND ${_PYTHON_PREFIX}_Development.Embed_FOUND)
       OR (NOT "Development.Module" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS
           AND ${_PYTHON_PREFIX}_Development.Embed_FOUND)
       OR (NOT "Development.Embed" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS
           AND ${_PYTHON_PREFIX}_Development.Module_FOUND))
        unset(_${_PYTHON_PREFIX}_Development_REASON_FAILURE)
    endif()

    if("Development" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS
       AND ${_PYTHON_PREFIX}_Development.Module_FOUND
       AND ${_PYTHON_PREFIX}_Development.Embed_FOUND)
        set(${_PYTHON_PREFIX}_Development_FOUND TRUE)
    endif()

    if((${_PYTHON_PREFIX}_Development.Module_FOUND
        OR ${_PYTHON_PREFIX}_Development.Embed_FOUND)
       AND EXISTS "${_${_PYTHON_PREFIX}_INCLUDE_DIR}/PyPy.h")
        # retrieve PyPy version
        file(STRINGS "${_${_PYTHON_PREFIX}_INCLUDE_DIR}/patchlevel.h"
             ${_PYTHON_PREFIX}_PyPy_VERSION
             REGEX "^#define[ \t]+PYPY_VERSION[ \t]+\"[^\"]+\"")
        string(REGEX
               REPLACE "^#define[ \t]+PYPY_VERSION[ \t]+\"([^\"]+)\".*" "\\1"
                       ${_PYTHON_PREFIX}_PyPy_VERSION "${${_PYTHON_PREFIX}_PyPy_VERSION}")
    endif()

    if(NOT DEFINED ${_PYTHON_PREFIX}_SOABI)
        _python_get_config_var(${_PYTHON_PREFIX}_SOABI SOABI)
    endif()

    _python_compute_development_signature(Module)
    _python_compute_development_signature(Embed)

    # Restore the original find library ordering
    if(DEFINED _${_PYTHON_PREFIX}_CMAKE_FIND_LIBRARY_SUFFIXES)
        set(CMAKE_FIND_LIBRARY_SUFFIXES ${_${_PYTHON_PREFIX}_CMAKE_FIND_LIBRARY_SUFFIXES})
    endif()

    if(${_PYTHON_PREFIX}_ARTIFACTS_INTERACTIVE)
        if("LIBRARY" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_ARTIFACTS)
            set(${_PYTHON_PREFIX}_LIBRARY
                "${_${_PYTHON_PREFIX}_LIBRARY_RELEASE}"
                CACHE FILEPATH "${_PYTHON_PREFIX} Library")
        endif()
        if("INCLUDE_DIR" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_ARTIFACTS)
            set(${_PYTHON_PREFIX}_INCLUDE_DIR
                "${_${_PYTHON_PREFIX}_INCLUDE_DIR}"
                CACHE FILEPATH "${_PYTHON_PREFIX} Include Directory")
        endif()
    endif()

    _python_mark_as_internal(
        _${_PYTHON_PREFIX}_LIBRARY_RELEASE
        _${_PYTHON_PREFIX}_LIBRARY_DEBUG
        _${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE
        _${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DEBUG
        _${_PYTHON_PREFIX}_INCLUDE_DIR
        _${_PYTHON_PREFIX}_CONFIG
        _${_PYTHON_PREFIX}_DEVELOPMENT_MODULE_SIGNATURE
        _${_PYTHON_PREFIX}_DEVELOPMENT_EMBED_SIGNATURE)
endif()

if(${_PYTHON_PREFIX}_FIND_REQUIRED_NumPy)
    list(APPEND _${_PYTHON_PREFIX}_REQUIRED_VARS ${_PYTHON_PREFIX}_NumPy_INCLUDE_DIRS)
endif()
if("NumPy" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS
   AND ${_PYTHON_PREFIX}_Interpreter_FOUND)
    list(APPEND _${_PYTHON_PREFIX}_CACHED_VARS _${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR)

    if(DEFINED ${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR
       AND IS_ABSOLUTE "${${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR}")
        set(_${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR
            "${${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR}"
            CACHE INTERNAL "")
    elseif(DEFINED _${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR)
        # compute numpy signature. Depends on interpreter and development signatures
        string(
            MD5 __${_PYTHON_PREFIX}_NUMPY_SIGNATURE
                "${_${_PYTHON_PREFIX}_INTERPRETER_SIGNATURE}:${_${_PYTHON_PREFIX}_DEVELOPMENT_MODULE_SIGNATURE}:${_${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR}"
            )
        if(NOT __${_PYTHON_PREFIX}_NUMPY_SIGNATURE STREQUAL
           _${_PYTHON_PREFIX}_NUMPY_SIGNATURE
           OR NOT EXISTS "${_${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR}")
            unset(_${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR CACHE)
            unset(_${_PYTHON_PREFIX}_NUMPY_SIGNATURE CACHE)
        endif()
    endif()

    if(NOT _${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR)
        execute_process(
            COMMAND
                ${${_PYTHON_PREFIX}_INTERPRETER_LAUNCHER}
                "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                "import sys\ntry: import numpy; sys.stdout.write(numpy.get_include())\nexcept:pass\n"
            RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
            OUTPUT_VARIABLE _${_PYTHON_PREFIX}_NumPy_PATH
            ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)

        if(NOT _${_PYTHON_PREFIX}_RESULT)
            find_path(
                _${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR
                NAMES "numpy/arrayobject.h" "numpy/numpyconfig.h"
                HINTS "${_${_PYTHON_PREFIX}_NumPy_PATH}"
                NO_DEFAULT_PATH)
        endif()
    endif()

    set(${_PYTHON_PREFIX}_NumPy_INCLUDE_DIRS "${_${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR}")

    if(_${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR AND NOT EXISTS
                                                "${_${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR}")
        set(_${_PYTHON_PREFIX}_NumPy_REASON_FAILURE
            "Cannot find the directory \"${_${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR}\"")
        set_property(CACHE _${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR
                     PROPERTY VALUE "${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR-NOTFOUND")
    endif()

    if(_${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR)
        execute_process(
            COMMAND
                ${${_PYTHON_PREFIX}_INTERPRETER_LAUNCHER}
                "${_${_PYTHON_PREFIX}_EXECUTABLE}" -c
                "import sys\ntry: import numpy; sys.stdout.write(numpy.__version__)\nexcept:pass\n"
            RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
            OUTPUT_VARIABLE _${_PYTHON_PREFIX}_NumPy_VERSION)
        if(NOT _${_PYTHON_PREFIX}_RESULT)
            set(${_PYTHON_PREFIX}_NumPy_VERSION "${_${_PYTHON_PREFIX}_NumPy_VERSION}")
        else()
            unset(${_PYTHON_PREFIX}_NumPy_VERSION)
        endif()

        # final step: set NumPy founded only if Development.Module component is founded as
        # well
        set(${_PYTHON_PREFIX}_NumPy_FOUND ${${_PYTHON_PREFIX}_Development.Module_FOUND})
    else()
        set(${_PYTHON_PREFIX}_NumPy_FOUND FALSE)
    endif()

    if(${_PYTHON_PREFIX}_NumPy_FOUND)
        unset(_${_PYTHON_PREFIX}_NumPy_REASON_FAILURE)

        # compute and save numpy signature
        string(
            MD5 __${_PYTHON_PREFIX}_NUMPY_SIGNATURE
                "${_${_PYTHON_PREFIX}_INTERPRETER_SIGNATURE}:${_${_PYTHON_PREFIX}_DEVELOPMENT_MODULE_SIGNATURE}:${${_PYTHON_PREFIX}_NumPyINCLUDE_DIR}"
            )
        set(_${_PYTHON_PREFIX}_NUMPY_SIGNATURE
            "${__${_PYTHON_PREFIX}_NUMPY_SIGNATURE}"
            CACHE INTERNAL "")
    else()
        unset(_${_PYTHON_PREFIX}_NUMPY_SIGNATURE CACHE)
    endif()

    if(${_PYTHON_PREFIX}_ARTIFACTS_INTERACTIVE)
        set(${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR
            "${_${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR}"
            CACHE FILEPATH "${_PYTHON_PREFIX} NumPy Include Directory")
    endif()

    _python_mark_as_internal(_${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR
                             _${_PYTHON_PREFIX}_NUMPY_SIGNATURE)
endif()

# final validation
if(${_PYTHON_PREFIX}_VERSION_MAJOR AND NOT ${_PYTHON_PREFIX}_VERSION_MAJOR VERSION_EQUAL
                                       _${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR)
    _python_display_failure(
        "Could NOT find ${_PYTHON_PREFIX}: Found unsuitable major version \"${${_PYTHON_PREFIX}_VERSION_MAJOR}\", but required major version is exact version \"${_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR}\""
        )
endif()

unset(_${_PYTHON_PREFIX}_REASON_FAILURE)
foreach(_${_PYTHON_PREFIX}_COMPONENT IN ITEMS Interpreter Compiler Development NumPy)
    if(_${_PYTHON_PREFIX}_${_${_PYTHON_PREFIX}_COMPONENT}_REASON_FAILURE)
        string(
            APPEND
            _${_PYTHON_PREFIX}_REASON_FAILURE
            "\n        ${_${_PYTHON_PREFIX}_COMPONENT}: ${_${_PYTHON_PREFIX}_${_${_PYTHON_PREFIX}_COMPONENT}_REASON_FAILURE}"
            )
        unset(_${_PYTHON_PREFIX}_${_${_PYTHON_PREFIX}_COMPONENT}_REASON_FAILURE)
    endif()
endforeach()

include(FindPackageHandleStandardArgs)
if(CMAKE_VERSION VERSION_LESS 3.16)
    find_package_handle_standard_args(
        ${_PYTHON_PREFIX}
        REQUIRED_VARS ${_${_PYTHON_PREFIX}_REQUIRED_VARS}
        VERSION_VAR ${_PYTHON_PREFIX}_VERSION
        HANDLE_COMPONENTS
        FAIL_MESSAGE "${_${_PYTHON_PREFIX}_REASON_FAILURE}")
else()
    find_package_handle_standard_args(
        ${_PYTHON_PREFIX}
        REQUIRED_VARS ${_${_PYTHON_PREFIX}_REQUIRED_VARS}
        VERSION_VAR ${_PYTHON_PREFIX}_VERSION
        HANDLE_COMPONENTS REASON_FAILURE_MESSAGE "${_${_PYTHON_PREFIX}_REASON_FAILURE}")
endif()

# Create imported targets and helper functions
if(_${_PYTHON_PREFIX}_CMAKE_ROLE STREQUAL "PROJECT")
    if("Interpreter" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS
       AND ${_PYTHON_PREFIX}_Interpreter_FOUND
       AND NOT TARGET ${_PYTHON_PREFIX}::Interpreter)
        add_executable(${_PYTHON_PREFIX}::Interpreter IMPORTED)
        set_property(TARGET ${_PYTHON_PREFIX}::Interpreter
                     PROPERTY IMPORTED_LOCATION "${${_PYTHON_PREFIX}_EXECUTABLE}")
    endif()

    if("Compiler" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS
       AND ${_PYTHON_PREFIX}_Compiler_FOUND
       AND NOT TARGET ${_PYTHON_PREFIX}::Compiler)
        add_executable(${_PYTHON_PREFIX}::Compiler IMPORTED)
        set_property(TARGET ${_PYTHON_PREFIX}::Compiler
                     PROPERTY IMPORTED_LOCATION "${${_PYTHON_PREFIX}_COMPILER}")
    endif()

    if(("Development.Module" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS
        AND ${_PYTHON_PREFIX}_Development.Module_FOUND)
       OR ("Development.Embed" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS
           AND ${_PYTHON_PREFIX}_Development.Embed_FOUND))

        macro(__PYTHON_IMPORT_LIBRARY __name)
            if(${_PYTHON_PREFIX}_LIBRARY_RELEASE MATCHES "${CMAKE_SHARED_LIBRARY_SUFFIX}$"
               OR ${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE)
                set(_${_PYTHON_PREFIX}_LIBRARY_TYPE SHARED)
            else()
                set(_${_PYTHON_PREFIX}_LIBRARY_TYPE STATIC)
            endif()

            if(NOT TARGET ${__name})
                add_library(${__name} ${_${_PYTHON_PREFIX}_LIBRARY_TYPE} IMPORTED)
            endif()

            set_property(TARGET ${__name} PROPERTY INTERFACE_INCLUDE_DIRECTORIES
                                                   "${${_PYTHON_PREFIX}_INCLUDE_DIRS}")

            if(${_PYTHON_PREFIX}_LIBRARY_RELEASE
               AND ${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE)
                # System manage shared libraries in two parts: import and runtime
                if(${_PYTHON_PREFIX}_LIBRARY_RELEASE AND ${_PYTHON_PREFIX}_LIBRARY_DEBUG)
                    set_property(TARGET ${__name} PROPERTY IMPORTED_CONFIGURATIONS
                                                           RELEASE DEBUG)
                    set_target_properties(
                        ${__name}
                        PROPERTIES IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "C"
                                   IMPORTED_IMPLIB_RELEASE
                                   "${${_PYTHON_PREFIX}_LIBRARY_RELEASE}"
                                   IMPORTED_LOCATION_RELEASE
                                   "${${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE}")
                    set_target_properties(
                        ${__name}
                        PROPERTIES IMPORTED_LINK_INTERFACE_LANGUAGES_DEBUG "C"
                                   IMPORTED_IMPLIB_DEBUG
                                   "${${_PYTHON_PREFIX}_LIBRARY_DEBUG}"
                                   IMPORTED_LOCATION_DEBUG
                                   "${${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DEBUG}")
                else()
                    set_target_properties(
                        ${__name}
                        PROPERTIES IMPORTED_LINK_INTERFACE_LANGUAGES "C"
                                   IMPORTED_IMPLIB "${${_PYTHON_PREFIX}_LIBRARIES}"
                                   IMPORTED_LOCATION
                                   "${${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE}")
                endif()
            else()
                if(${_PYTHON_PREFIX}_LIBRARY_RELEASE AND ${_PYTHON_PREFIX}_LIBRARY_DEBUG)
                    set_property(TARGET ${__name} PROPERTY IMPORTED_CONFIGURATIONS
                                                           RELEASE DEBUG)
                    set_target_properties(
                        ${__name}
                        PROPERTIES IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "C"
                                   IMPORTED_LOCATION_RELEASE
                                   "${${_PYTHON_PREFIX}_LIBRARY_RELEASE}")
                    set_target_properties(
                        ${__name}
                        PROPERTIES IMPORTED_LINK_INTERFACE_LANGUAGES_DEBUG "C"
                                   IMPORTED_LOCATION_DEBUG
                                   "${${_PYTHON_PREFIX}_LIBRARY_DEBUG}")
                else()
                    set_target_properties(
                        ${__name}
                        PROPERTIES IMPORTED_LINK_INTERFACE_LANGUAGES "C"
                                   IMPORTED_LOCATION
                                   "${${_PYTHON_PREFIX}_LIBRARY_RELEASE}")
                endif()
            endif()

            if(_${_PYTHON_PREFIX}_LIBRARY_TYPE STREQUAL "STATIC")
                # extend link information with dependent libraries
                _python_get_config_var(_${_PYTHON_PREFIX}_LINK_LIBRARIES LIBS)
                if(_${_PYTHON_PREFIX}_LINK_LIBRARIES)
                    set_property(
                        TARGET ${__name} PROPERTY INTERFACE_LINK_LIBRARIES
                                                  ${_${_PYTHON_PREFIX}_LINK_LIBRARIES})
                endif()
            endif()
        endmacro()

        if(${_PYTHON_PREFIX}_Development.Embed_FOUND)
            __python_import_library(${_PYTHON_PREFIX}::Python)
        endif()

        if(${_PYTHON_PREFIX}_Development.Module_FOUND)
            if("LIBRARY" IN_LIST _${_PYTHON_PREFIX}_FIND_DEVELOPMENT_MODULE_ARTIFACTS)
                # On Windows/CYGWIN/MSYS, Python::Module is the same as Python::Python but
                # ALIAS cannot be used because the imported library is not GLOBAL.
                __python_import_library(${_PYTHON_PREFIX}::Module)
            else()
                if(NOT TARGET ${_PYTHON_PREFIX}::Module)
                    add_library(${_PYTHON_PREFIX}::Module INTERFACE IMPORTED)
                endif()
                set_property(
                    TARGET ${_PYTHON_PREFIX}::Module
                    PROPERTY INTERFACE_INCLUDE_DIRECTORIES
                             "${${_PYTHON_PREFIX}_INCLUDE_DIRS}")

                # When available, enforce shared library generation with undefined symbols
                if(APPLE)
                    set_property(
                        TARGET ${_PYTHON_PREFIX}::Module
                        PROPERTY INTERFACE_LINK_OPTIONS
                                 "LINKER:-undefined,dynamic_lookup")
                endif()
                if(CMAKE_SYSTEM_NAME STREQUAL "SunOS")
                    set_property(TARGET ${_PYTHON_PREFIX}::Module
                                 PROPERTY INTERFACE_LINK_OPTIONS "LINKER:-z,nodefs")
                endif()
                if(CMAKE_SYSTEM_NAME STREQUAL "AIX")
                    set_property(TARGET ${_PYTHON_PREFIX}::Module
                                 PROPERTY INTERFACE_LINK_OPTIONS "LINKER:-b,erok")
                endif()
            endif()
        endif()

        #
        # PYTHON_ADD_LIBRARY (<name> [STATIC|SHARED|MODULE] src1 src2 ... srcN) It is used
        # to build modules for python.
        #
        function(__${_PYTHON_PREFIX}_ADD_LIBRARY prefix name)
            cmake_parse_arguments(PARSE_ARGV 2 PYTHON_ADD_LIBRARY
                                  "STATIC;SHARED;MODULE;WITH_SOABI" "" "")

            if(PYTHON_ADD_LIBRARY_STATIC)
                set(type STATIC)
            elseif(PYTHON_ADD_LIBRARY_SHARED)
                set(type SHARED)
            else()
                set(type MODULE)
            endif()

            if(type STREQUAL "MODULE" AND NOT TARGET ${prefix}::Module)
                message(
                    SEND_ERROR
                        "${prefix}_ADD_LIBRARY: dependent target '${prefix}::Module' is not defined.\n   Did you miss to request COMPONENT 'Development.Module'?"
                    )
                return()
            endif()
            if(NOT type STREQUAL "MODULE" AND NOT TARGET ${prefix}::Python)
                message(
                    SEND_ERROR
                        "${prefix}_ADD_LIBRARY: dependent target '${prefix}::Python' is not defined.\n   Did you miss to request COMPONENT 'Development.Embed'?"
                    )
                return()
            endif()

            add_library(${name} ${type} ${PYTHON_ADD_LIBRARY_UNPARSED_ARGUMENTS})

            get_property(
                type
                TARGET ${name}
                PROPERTY TYPE)

            if(type STREQUAL "MODULE_LIBRARY")
                target_link_libraries(${name} PRIVATE ${prefix}::Module)
                # customize library name to follow module name rules
                set_property(TARGET ${name} PROPERTY PREFIX "")
                if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
                    set_property(TARGET ${name} PROPERTY SUFFIX ".pyd")
                endif()

                if(PYTHON_ADD_LIBRARY_WITH_SOABI AND ${prefix}_SOABI)
                    get_property(
                        suffix
                        TARGET ${name}
                        PROPERTY SUFFIX)
                    if(NOT suffix)
                        set(suffix "${CMAKE_SHARED_MODULE_SUFFIX}")
                    endif()
                    set_property(TARGET ${name} PROPERTY SUFFIX
                                                         ".${${prefix}_SOABI}${suffix}")
                endif()
            else()
                if(PYTHON_ADD_LIBRARY_WITH_SOABI)
                    message(
                        AUTHOR_WARNING
                            "Find${prefix}: Option `WITH_SOABI` is only supported for `MODULE` library type."
                        )
                endif()
                target_link_libraries(${name} PRIVATE ${prefix}::Python)
            endif()
        endfunction()
    endif()

    if("NumPy" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS
       AND ${_PYTHON_PREFIX}_NumPy_FOUND
       AND NOT TARGET ${_PYTHON_PREFIX}::NumPy
       AND TARGET ${_PYTHON_PREFIX}::Module)
        add_library(${_PYTHON_PREFIX}::NumPy INTERFACE IMPORTED)
        set_property(
            TARGET ${_PYTHON_PREFIX}::NumPy
            PROPERTY INTERFACE_INCLUDE_DIRECTORIES
                     "${${_PYTHON_PREFIX}_NumPy_INCLUDE_DIRS}")
        target_link_libraries(${_PYTHON_PREFIX}::NumPy
                              INTERFACE ${_PYTHON_PREFIX}::Module)
    endif()
endif()

# final clean-up

# Restore CMAKE_FIND_APPBUNDLE
if(DEFINED _${_PYTHON_PREFIX}_CMAKE_FIND_APPBUNDLE)
    set(CMAKE_FIND_APPBUNDLE ${_${_PYTHON_PREFIX}_CMAKE_FIND_APPBUNDLE})
    unset(_${_PYTHON_PREFIX}_CMAKE_FIND_APPBUNDLE)
else()
    unset(CMAKE_FIND_APPBUNDLE)
endif()
# Restore CMAKE_FIND_FRAMEWORK
if(DEFINED _${_PYTHON_PREFIX}_CMAKE_FIND_FRAMEWORK)
    set(CMAKE_FIND_FRAMEWORK ${_${_PYTHON_PREFIX}_CMAKE_FIND_FRAMEWORK})
    unset(_${_PYTHON_PREFIX}_CMAKE_FIND_FRAMEWORK)
else()
    unset(CMAKE_FIND_FRAMEWORK)
endif()
