CMake/Modules/FindPython/Support.cmake

# 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.
#

cmake_policy (GET CMP0094 _${_PYTHON_PREFIX}_LOOKUP_POLICY)

cmake_policy (VERSION 3.7)

if (_${_PYTHON_PREFIX}_LOOKUP_POLICY)
  cmake_policy (SET CMP0094 ${_${_PYTHON_PREFIX}_LOOKUP_POLICY})
endif()

#
# Initial configuration
#
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(_${_PYTHON_PREFIX}_VERSIONS 3.8 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3.0)
elseif (_${_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)
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()


macro (_PYTHON_FIND_FRAMEWORKS)
  set (${_PYTHON_PREFIX}_FRAMEWORKS)
  if (CMAKE_HOST_APPLE OR APPLE)
    set (_pff_frameworks ${CMAKE_FRAMEWORK_PATH}
                    $ENV{CMAKE_FRAMEWORK_PATH}
                    ~/Library/Frameworks
                    /usr/local/Frameworks
                    ${CMAKE_SYSTEM_FRAMEWORK_PATH})
    list (REMOVE_DUPLICATES _pff_frameworks)
    foreach (_pff_framework IN LISTS _pff_frameworks)
      if (EXISTS ${_pff_framework}/Python.framework)
        list (APPEND ${_PYTHON_PREFIX}_FRAMEWORKS ${_pff_framework}/Python.framework)
      endif()
    endforeach()
    unset (_pff_frameworks)
    unset (_pff_framework)
  endif()
endmacro()

function (_PYTHON_GET_FRAMEWORKS _PYTHON_PGF_FRAMEWORK_PATHS _PYTHON_VERSION)
  set (_PYTHON_FRAMEWORK_PATHS)
  foreach (_PYTHON_FRAMEWORK IN LISTS ${_PYTHON_PREFIX}_FRAMEWORKS)
    list (APPEND _PYTHON_FRAMEWORK_PATHS
          "${_PYTHON_FRAMEWORK}/Versions/${_PYTHON_VERSION}")
  endforeach()
  set (${_PYTHON_PGF_FRAMEWORK_PATHS} ${_PYTHON_FRAMEWORK_PATHS} PARENT_SCOPE)
endfunction()

function (_PYTHON_GET_REGISTRIES _PYTHON_PGR_REGISTRY_PATHS _PYTHON_VERSION)
  string (REPLACE "." "" _PYTHON_VERSION_NO_DOTS ${_PYTHON_VERSION})
  set (${_PYTHON_PGR_REGISTRY_PATHS}
       [HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${_PYTHON_VERSION}-${_${_PYTHON_PREFIX}_ARCH}\\InstallPath]
       [HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${_PYTHON_VERSION}-${_${_PYTHON_PREFIX}_ARCH2}\\InstallPath]
       [HKEY_CURRENT_USER\\SOFTWARE\\Python\\PythonCore\\${_PYTHON_VERSION}\\InstallPath]
       [HKEY_CURRENT_USER\\SOFTWARE\\Python\\ContinuumAnalytics\\Anaconda${_PYTHON_VERSION_NO_DOTS}-${_${_PYTHON_PREFIX}_ARCH}\\InstallPath]
       [HKEY_CURRENT_USER\\SOFTWARE\\Python\\ContinuumAnalytics\\Anaconda${_PYTHON_VERSION_NO_DOTS}-${_${_PYTHON_PREFIX}_ARCH2}\\InstallPath]
       [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_PYTHON_VERSION}-${_${_PYTHON_PREFIX}_ARCH}\\InstallPath]
       [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_PYTHON_VERSION}-${_${_PYTHON_PREFIX}_ARCH2}\\InstallPath]
       [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\PythonCore\\${_PYTHON_VERSION}\\InstallPath]
       [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\ContinuumAnalytics\\Anaconda${_PYTHON_VERSION_NO_DOTS}-${_${_PYTHON_PREFIX}_ARCH}\\InstallPath]
       [HKEY_LOCAL_MACHINE\\SOFTWARE\\Python\\ContinuumAnalytics\\Anaconda${_PYTHON_VERSION_NO_DOTS}-${_${_PYTHON_PREFIX}_ARCH2}\\InstallPath]
       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 "LIBRARY;INCLUDE" "VERSION" "")

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

  set (path_suffixes)
  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()

  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;EXECUTABLE;CONFIG;LIBRARY;WIN32;DEBUG" "VERSION" "")

  set (names)

  if (_PGN_WIN32)
    string (REPLACE "." "" _PYTHON_VERSION_NO_DOTS ${_PGN_VERSION})

    set (name python${_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_EXECUTABLE 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${_PGN_VERSION}")
        list (TRANSFORM abinames APPEND "-config")
        list (APPEND names ${abinames})
      endif()
      set (abinames "${abi}")
      list (TRANSFORM abinames PREPEND "python${_PGN_VERSION}")
      if (_PGN_CONFIG)
        list (TRANSFORM abinames APPEND "-config")
      endif()
      list (APPEND names ${abinames})
    else()
      if (_PGN_CONFIG AND DEFINED CMAKE_LIBRARY_ARCHITECTURE)
        set (abinames "${CMAKE_LIBRARY_ARCHITECTURE}-python${_PGN_VERSION}")
      endif()
      list (APPEND abinames "python${_PGN_VERSION}")
      if (_PGN_CONFIG)
        list (TRANSFORM abinames APPEND "-config")
      endif()
      list (APPEND names ${abinames})
    endif()
  endif()

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


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

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

  # validate ABI compatibility
  if (DEFINED _${_PYTHON_PREFIX}_FIND_ABI)
    execute_process (COMMAND "${${_PYTHON_PREFIX}_EXECUTABLE}" -c
                             "import sys; sys.stdout.write(sys.abiflags)"
                     RESULT_VARIABLE result
                     OUTPUT_VARIABLE abi
                     ERROR_QUIET
                     OUTPUT_STRIP_TRAILING_WHITESPACE)
    if (result)
      # assume ABI is not supported
      set (abi "")
    endif()
    if (NOT abi IN_LIST _${_PYTHON_PREFIX}_ABIFLAGS)
      # incompatible ABI
      set_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 AND NOT python_name STREQUAL "python${expected_version}${abi}${CMAKE_EXECUTABLE_SUFFIX}")
    # executable found must have a specific version
    execute_process (COMMAND "${${_PYTHON_PREFIX}_EXECUTABLE}" -c
                             "import sys; sys.stdout.write('.'.join([str(x) for x in sys.version_info[:2]]))"
                     RESULT_VARIABLE result
                     OUTPUT_VARIABLE version
                     ERROR_QUIET
                     OUTPUT_STRIP_TRAILING_WHITESPACE)
    if (result OR (_PVI_EXACT AND NOT version VERSION_EQUAL expected_version) OR (version VERSION_LESS expected_version))
      # interpreter not usable or has wrong major version
      set_property (CACHE ${_PYTHON_PREFIX}_EXECUTABLE PROPERTY VALUE "${_PYTHON_PREFIX}_EXECUTABLE-NOTFOUND")
      return()
    endif()
  else()
    if (NOT python_name STREQUAL "python${_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR}${CMAKE_EXECUTABLE_SUFFIX}")
      # executable found do not have version in name
      # ensure major version is OK
      execute_process (COMMAND "${${_PYTHON_PREFIX}_EXECUTABLE}" -c
                               "import sys; sys.stdout.write(str(sys.version_info[0]))"
                       RESULT_VARIABLE result
                       OUTPUT_VARIABLE version
                       ERROR_QUIET
                       OUTPUT_STRIP_TRAILING_WHITESPACE)
      if (result OR NOT version EQUAL _${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR)
        # interpreter not usable or has wrong major version
        set_property (CACHE ${_PYTHON_PREFIX}_EXECUTABLE PROPERTY VALUE "${_PYTHON_PREFIX}_EXECUTABLE-NOTFOUND")
        return()
      endif()
    endif()
  endif()

  if (CMAKE_SIZEOF_VOID_P AND "Development" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS
      AND NOT CMAKE_CROSSCOMPILING)
    # In this case, interpreter must have same architecture as environment
    execute_process (COMMAND "${${_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
      set_property (CACHE ${_PYTHON_PREFIX}_EXECUTABLE PROPERTY VALUE "${_PYTHON_PREFIX}_EXECUTABLE-NOTFOUND")
      return()
    endif()
  endif()
endfunction()


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

  cmake_parse_arguments (_PVC "EXACT" "" "" ${ARGN})
  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()

  # 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 "${working_dir}/version.py" "import sys; sys.stdout.write(str(sys.version_info[0]))")
  else()
    file (WRITE "${working_dir}/version.py" "import sys; sys.stdout.write('.'.join([str(x) for x in sys.version_info[:2]]))\n")
  endif()
  execute_process (COMMAND "${${_PYTHON_PREFIX}_COMPILER}" /target:exe /embed "${working_dir}/version.py"
                   WORKING_DIRECTORY "${working_dir}"
                   OUTPUT_QUIET
                   ERROR_QUIET
                   OUTPUT_STRIP_TRAILING_WHITESPACE)
  execute_process (COMMAND "${working_dir}/version"
                   WORKING_DIRECTORY "${working_dir}"
                   RESULT_VARIABLE result
                   OUTPUT_VARIABLE version
                   ERROR_QUIET)
  file (REMOVE_RECURSE "${_${_PYTHON_PREFIX}_VERSION_DIR}")

  if (result OR (_PVC_EXACT AND NOT version VERSION_EQUAL expected_version) OR (version VERSION_LESS expected_version))
    # Compiler not usable or has wrong version
    set_property (CACHE ${_PYTHON_PREFIX}_COMPILER PROPERTY VALUE "${_PYTHON_PREFIX}_COMPILER-NOTFOUND")
  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 ${ARGV})
  list (REMOVE_AT _PYTHON_LIBS 0)
  foreach (_PYTHON_LIB IN LISTS _PYTHON_LIBS)
    if (${_PYTHON_LIB})
      get_filename_component (_PYTHON_DIR "${${_PYTHON_LIB}}" DIRECTORY)
      list (APPEND _PYTHON_DIRS "${_PYTHON_DIR}")
    endif()
  endforeach()
  if (_PYTHON_DIRS)
    list (REMOVE_DUPLICATES _PYTHON_DIRS)
  endif()
  set (${_PYTHON_SLD_RESULT} ${_PYTHON_DIRS} PARENT_SCOPE)
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")
  list (REMOVE_DUPLICATES ${_PYTHON_PREFIX}_FIND_COMPONENTS)
endif()
foreach (_${_PYTHON_PREFIX}_COMPONENT IN LISTS ${_PYTHON_PREFIX}_FIND_COMPONENTS)
  set (${_PYTHON_PREFIX}_${_${_PYTHON_PREFIX}_COMPONENT}_FOUND FALSE)
endforeach()
unset (_${_PYTHON_PREFIX}_FIND_VERSIONS)

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

if (${_PYTHON_PREFIX}_FIND_VERSION_COUNT GREATER 1)
  if (${_PYTHON_PREFIX}_FIND_VERSION_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 ${_PYTHON_PREFIX}_FIND_VERSION)
        list (APPEND _${_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()

# Define lookup strategy
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
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 (_${_PYTHON_PREFIX}_IRON_PYTHON_NAMES ipy${_${_PYTHON_PREFIX}_ARCH} ipy)
else()
  # architecture unknown, search for natural interpreter
  set (_${_PYTHON_PREFIX}_IRON_PYTHON_NAMES ipy)
endif()
set (_${_PYTHON_PREFIX}_IRON_PYTHON_PATH_SUFFIXES net45 net40)

# 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 handling
if (DEFINED ENV{VIRTUAL_ENV})
  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()


unset (_${_PYTHON_PREFIX}_REQUIRED_VARS)
unset (_${_PYTHON_PREFIX}_CACHED_VARS)


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

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

  if (_${_PYTHON_PREFIX}_FIND_STRATEGY STREQUAL "LOCATION")
    unset (_${_PYTHON_PREFIX}_NAMES)
    unset (_${_PYTHON_PREFIX}_FRAMEWORK_PATHS)
    unset (_${_PYTHON_PREFIX}_REGISTRY_PATHS)

    foreach (_${_PYTHON_PREFIX}_VERSION IN LISTS _${_PYTHON_PREFIX}_FIND_VERSIONS)
      # build all executable names
      _python_get_names (_${_PYTHON_PREFIX}_VERSION_NAMES VERSION ${_${_PYTHON_PREFIX}_VERSION} POSIX EXECUTABLE)
      list (APPEND _${_PYTHON_PREFIX}_NAMES ${_${_PYTHON_PREFIX}_VERSION_NAMES})

      # Framework Paths
      _python_get_frameworks (_${_PYTHON_PREFIX}_VERSION_PATHS ${_${_PYTHON_PREFIX}_VERSION})
      list (APPEND _${_PYTHON_PREFIX}_FRAMEWORK_PATHS ${_${_PYTHON_PREFIX}_VERSION_PATHS})

      # Registry Paths
      _python_get_registries (_${_PYTHON_PREFIX}_VERSION_PATHS ${_${_PYTHON_PREFIX}_VERSION})
      list (APPEND _${_PYTHON_PREFIX}_REGISTRY_PATHS ${_${_PYTHON_PREFIX}_VERSION_PATHS}
                   [HKEY_LOCAL_MACHINE\\SOFTWARE\\IronPython\\${_${_PYTHON_PREFIX}_VERSION}\\InstallPath])
    endforeach()
    list (APPEND _${_PYTHON_PREFIX}_NAMES python${_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR} python)

    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
                      PATH_SUFFIXES bin Scripts
                      NO_CMAKE_PATH
                      NO_CMAKE_ENVIRONMENT_PATH
                      NO_SYSTEM_ENVIRONMENT_PATH
                      NO_CMAKE_SYSTEM_PATH)

        _python_validate_interpreter (${${_PYTHON_PREFIX}_FIND_VERSION})
        if (${_PYTHON_PREFIX}_EXECUTABLE)
          break()
        endif()
        if (NOT _${_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 bin
                      NO_CMAKE_PATH
                      NO_CMAKE_ENVIRONMENT_PATH
                      NO_SYSTEM_ENVIRONMENT_PATH
                      NO_CMAKE_SYSTEM_PATH)
        _python_validate_interpreter (${${_PYTHON_PREFIX}_FIND_VERSION})
        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}
                            ${_${_PYTHON_PREFIX}_IRON_PYTHON_NAMES}
                      NAMES_PER_DIR
                      HINTS ${_${_PYTHON_PREFIX}_HINTS}
                      PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                      PATH_SUFFIXES bin ${_${_PYTHON_PREFIX}_IRON_PYTHON_PATH_SUFFIXES}
                      NO_SYSTEM_ENVIRONMENT_PATH
                      NO_CMAKE_SYSTEM_PATH)
        _python_validate_interpreter (${${_PYTHON_PREFIX}_FIND_VERSION})
        if (${_PYTHON_PREFIX}_EXECUTABLE)
          break()
        endif()
      endif()

      # try using HINTS
      find_program (${_PYTHON_PREFIX}_EXECUTABLE
                    NAMES ${_${_PYTHON_PREFIX}_NAMES}
                          ${_${_PYTHON_PREFIX}_IRON_PYTHON_NAMES}
                    NAMES_PER_DIR
                    HINTS ${_${_PYTHON_PREFIX}_HINTS}
                    PATH_SUFFIXES bin ${_${_PYTHON_PREFIX}_IRON_PYTHON_PATH_SUFFIXES}
                    NO_SYSTEM_ENVIRONMENT_PATH
                    NO_CMAKE_SYSTEM_PATH)
      _python_validate_interpreter (${${_PYTHON_PREFIX}_FIND_VERSION})
      if (${_PYTHON_PREFIX}_EXECUTABLE)
        break()
      endif()
      # try using standard paths
      find_program (${_PYTHON_PREFIX}_EXECUTABLE
                    NAMES ${_${_PYTHON_PREFIX}_NAMES}
                          ${_${_PYTHON_PREFIX}_IRON_PYTHON_NAMES}
                    NAMES_PER_DIR
                    PATH_SUFFIXES bin ${_${_PYTHON_PREFIX}_IRON_PYTHON_PATH_SUFFIXES})
      _python_validate_interpreter (${${_PYTHON_PREFIX}_FIND_VERSION})
      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 bin
                      NO_DEFAULT_PATH)
        _python_validate_interpreter (${${_PYTHON_PREFIX}_FIND_VERSION})
        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}
                            ${_${_PYTHON_PREFIX}_IRON_PYTHON_NAMES}
                      NAMES_PER_DIR
                      PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                      PATH_SUFFIXES bin ${_${_PYTHON_PREFIX}_IRON_PYTHON_PATH_SUFFIXES}
                      NO_DEFAULT_PATH)
        _python_validate_interpreter (${${_PYTHON_PREFIX}_FIND_VERSION})
        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 EXECUTABLE)
      list (APPEND _${_PYTHON_PREFIX}_NAMES python${_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR}
                                            python)

      _python_get_frameworks (_${_PYTHON_PREFIX}_FRAMEWORK_PATHS ${_${_PYTHON_PREFIX}_VERSION})
      _python_get_registries (_${_PYTHON_PREFIX}_REGISTRY_PATHS ${_${_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
                      PATH_SUFFIXES bin Scripts
                      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 bin
                      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}
                            ${_${_PYTHON_PREFIX}_IRON_PYTHON_NAMES}
                      NAMES_PER_DIR
                      HINTS ${_${_PYTHON_PREFIX}_HINTS}
                      PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                            [HKEY_LOCAL_MACHINE\\SOFTWARE\\IronPython\\${_${_PYTHON_PREFIX}_VERSION}\\InstallPath]
                      PATH_SUFFIXES bin ${_${_PYTHON_PREFIX}_IRON_PYTHON_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}
                          ${_${_PYTHON_PREFIX}_IRON_PYTHON_NAMES}
                    NAMES_PER_DIR
                    HINTS ${_${_PYTHON_PREFIX}_HINTS}
                    PATH_SUFFIXES bin ${_${_PYTHON_PREFIX}_IRON_PYTHON_PATH_SUFFIXES}
                    NO_SYSTEM_ENVIRONMENT_PATH
                    NO_CMAKE_SYSTEM_PATH)
      _python_validate_interpreter (${_${_PYTHON_PREFIX}_VERSION} EXACT)
      if (${_PYTHON_PREFIX}_EXECUTABLE)
        break()
      endif()
      # try using standard paths.
      # NAMES_PER_DIR is not defined on purpose to have a chance to find
      # expected version.
      # For example, typical systems have 'python' for version 2.* and 'python3'
      # for version 3.*. So looking for names per dir will find, potentially,
      # systematically 'python' (i.e. version 2) even if version 3 is searched.
      if (CMAKE_HOST_WIN32)
        find_program (${_PYTHON_PREFIX}_EXECUTABLE
                      NAMES ${_${_PYTHON_PREFIX}_NAMES}
                            python
                            ${_${_PYTHON_PREFIX}_IRON_PYTHON_NAMES})
      else()
        find_program (${_PYTHON_PREFIX}_EXECUTABLE
                      NAMES ${_${_PYTHON_PREFIX}_NAMES})
      endif()
      _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 bin
                      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}
                            ${_${_PYTHON_PREFIX}_IRON_PYTHON_NAMES}
                      NAMES_PER_DIR
                      PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                            [HKEY_LOCAL_MACHINE\\SOFTWARE\\IronPython\\${_${_PYTHON_PREFIX}_VERSION}\\InstallPath]
                      PATH_SUFFIXES bin ${_${_PYTHON_PREFIX}_IRON_PYTHON_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.
      find_program (${_PYTHON_PREFIX}_EXECUTABLE
                    NAMES python${_${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR}
                          python
                          ${_${_PYTHON_PREFIX}_IRON_PYTHON_NAMES})

      _python_validate_interpreter ()
    endif()
  endif()

  # retrieve exact version of executable found
  if (${_PYTHON_PREFIX}_EXECUTABLE)
    execute_process (COMMAND "${${_PYTHON_PREFIX}_EXECUTABLE}" -c
                             "import sys; sys.stdout.write('.'.join([str(x) for x in sys.version_info[:3]]))"
                     RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                     OUTPUT_VARIABLE ${_PYTHON_PREFIX}_VERSION
                     ERROR_QUIET
                     OUTPUT_STRIP_TRAILING_WHITESPACE)
    if (NOT _${_PYTHON_PREFIX}_RESULT)
      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)
    else()
      # Interpreter is not usable
      set_property (CACHE ${_PYTHON_PREFIX}_EXECUTABLE PROPERTY VALUE "${_PYTHON_PREFIX}_EXECUTABLE-NOTFOUND")
      unset (${_PYTHON_PREFIX}_VERSION)
    endif()
  endif()

  if (${_PYTHON_PREFIX}_EXECUTABLE
      AND ${_PYTHON_PREFIX}_VERSION_MAJOR VERSION_EQUAL _${_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}_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 (${_PYTHON_PREFIX}_Interpreter_FOUND)
    if (NOT CMAKE_SIZEOF_VOID_P)
      # determine interpreter architecture
      execute_process (COMMAND "${${_PYTHON_PREFIX}_EXECUTABLE}" -c "import sys; print(sys.maxsize > 2**32)"
                       RESULT_VARIABLE _${_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}_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")
      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}_EXECUTABLE}" -c "import sys; print(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()
  else()
    unset (${_PYTHON_PREFIX}_INTERPRETER_ID)
  endif()

  # retrieve various package installation directories
  execute_process (COMMAND "${${_PYTHON_PREFIX}_EXECUTABLE}" -c "import sys; from distutils import sysconfig;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)]))"

                   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()

  mark_as_advanced (${_PYTHON_PREFIX}_EXECUTABLE)
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()

  # 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 (_${_PYTHON_PREFIX}_FIND_STRATEGY STREQUAL "LOCATION")
    set (_${_PYTHON_PREFIX}_REGISTRY_PATHS)

    foreach (_${_PYTHON_PREFIX}_VERSION IN LISTS _${_PYTHON_PREFIX}_FIND_VERSIONS)
      # Registry Paths
      list (APPEND _${_PYTHON_PREFIX}_REGISTRY_PATHS
                   [HKEY_LOCAL_MACHINE\\SOFTWARE\\IronPython\\${_${_PYTHON_PREFIX}_VERSION}\\InstallPath])
    endforeach()

    while (TRUE)
      if (_${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "FIRST")
        find_program (${_PYTHON_PREFIX}_COMPILER
                      NAMES ipyc
                      HINTS ${_${_PYTHON_PREFIX}_IRON_ROOT} ${_${_PYTHON_PREFIX}_HINTS}
                      PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                      PATH_SUFFIXES ${_${_PYTHON_PREFIX}_IRON_PYTHON_PATH_SUFFIXES}
                      NO_SYSTEM_ENVIRONMENT_PATH
                      NO_CMAKE_SYSTEM_PATH)
        _python_validate_compiler (${${_PYTHON_PREFIX}_FIND_VERSION})
        if (${_PYTHON_PREFIX}_COMPILER)
          break()
        endif()
      endif()

      find_program (${_PYTHON_PREFIX}_COMPILER
                    NAMES ipyc
                    HINTS ${_${_PYTHON_PREFIX}_IRON_ROOT} ${_${_PYTHON_PREFIX}_HINTS}
                    PATH_SUFFIXES ${_${_PYTHON_PREFIX}_IRON_PYTHON_PATH_SUFFIXES}
                    NO_SYSTEM_ENVIRONMENT_PATH
                    NO_CMAKE_SYSTEM_PATH)
      _python_validate_compiler (${${_PYTHON_PREFIX}_FIND_VERSION})
      if (${_PYTHON_PREFIX}_COMPILER)
        break()
      endif()

      if (_${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "LAST")
        find_program (${_PYTHON_PREFIX}_COMPILER
                      NAMES ipyc
                      PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                      PATH_SUFFIXES ${_${_PYTHON_PREFIX}_IRON_PYTHON_PATH_SUFFIXES}
                      NO_DEFAULT_PATH)
      endif()

      break()
    endwhile()
  else()
    # try using root dir and registry
    foreach (_${_PYTHON_PREFIX}_VERSION IN LISTS _${_PYTHON_PREFIX}_FIND_VERSIONS)
      if (_${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "FIRST")
        find_program (${_PYTHON_PREFIX}_COMPILER
                      NAMES ipyc
                      HINTS ${_${_PYTHON_PREFIX}_IRON_ROOT} ${_${_PYTHON_PREFIX}_HINTS}
                      PATHS [HKEY_LOCAL_MACHINE\\SOFTWARE\\IronPython\\${_${_PYTHON_PREFIX}_VERSION}\\InstallPath]
                      PATH_SUFFIXES ${_${_PYTHON_PREFIX}_IRON_PYTHON_PATH_SUFFIXES}
                      NO_SYSTEM_ENVIRONMENT_PATH
                      NO_CMAKE_SYSTEM_PATH)
        _python_validate_compiler (${_${_PYTHON_PREFIX}_VERSION} EXACT)
        if (${_PYTHON_PREFIX}_COMPILER)
          break()
        endif()
      endif()

      find_program (${_PYTHON_PREFIX}_COMPILER
                    NAMES ipyc
                    HINTS ${_${_PYTHON_PREFIX}_IRON_ROOT} ${_${_PYTHON_PREFIX}_HINTS}
                    PATH_SUFFIXES ${_${_PYTHON_PREFIX}_IRON_PYTHON_PATH_SUFFIXES}
                    NO_SYSTEM_ENVIRONMENT_PATH
                    NO_CMAKE_SYSTEM_PATH)
      _python_validate_compiler (${_${_PYTHON_PREFIX}_VERSION} EXACT)
      if (${_PYTHON_PREFIX}_COMPILER)
        break()
      endif()

      if (_${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "LAST")
        find_program (${_PYTHON_PREFIX}_COMPILER
                      NAMES ipyc
                      PATHS [HKEY_LOCAL_MACHINE\\SOFTWARE\\IronPython\\${_${_PYTHON_PREFIX}_VERSION}\\InstallPath]
                      PATH_SUFFIXES ${_${_PYTHON_PREFIX}_IRON_PYTHON_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
    find_program (${_PYTHON_PREFIX}_COMPILER
                  NAMES ipyc
                  HINTS ${_${_PYTHON_PREFIX}_IRON_ROOT} ${_${_PYTHON_PREFIX}_HINTS}
                  PATH_SUFFIXES ${_${_PYTHON_PREFIX}_IRON_PYTHON_PATH_SUFFIXES})
  endif()

  if (${_PYTHON_PREFIX}_COMPILER)
    # retrieve python environment version from compiler
    set (_${_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}" /target:exe /embed "${_${_PYTHON_PREFIX}_VERSION_DIR}/version.py"
                     WORKING_DIRECTORY "${_${_PYTHON_PREFIX}_VERSION_DIR}"
                     OUTPUT_QUIET
                     ERROR_QUIET)
    execute_process (COMMAND "${_${_PYTHON_PREFIX}_VERSION_DIR}/version"
                     WORKING_DIRECTORY "${_${_PYTHON_PREFIX}_VERSION_DIR}"
                     RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                     OUTPUT_VARIABLE _${_PYTHON_PREFIX}_VERSION
                     ERROR_QUIET)
    if (NOT _${_PYTHON_PREFIX}_RESULT)
      string (REGEX MATCHALL "[0-9]+" _${_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_property (CACHE ${_PYTHON_PREFIX}_COMPILER PROPERTY VALUE "${_PYTHON_PREFIX}_COMPILER-NOTFOUND")
    endif()
    file (REMOVE_RECURSE "${_${_PYTHON_PREFIX}_VERSION_DIR}")
  endif()

  if (${_PYTHON_PREFIX}_COMPILER)
    if (${_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 (${_PYTHON_PREFIX}_Compiler_FOUND)
    set (${_PYTHON_PREFIX}_COMPILER_ID IronPython)
  else()
    unset (${_PYTHON_PREFIX}_COMPILER_ID)
  endif()

  mark_as_advanced (${_PYTHON_PREFIX}_COMPILER)
endif()


# third step, search for the development artifacts
## Development environment is not compatible with IronPython interpreter
if ("Development" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS
    AND NOT ${_PYTHON_PREFIX}_INTERPRETER_ID STREQUAL "IronPython")
  list (APPEND _${_PYTHON_PREFIX}_CACHED_VARS ${_PYTHON_PREFIX}_LIBRARY
                                              ${_PYTHON_PREFIX}_LIBRARY_RELEASE
                                              ${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE
                                              ${_PYTHON_PREFIX}_LIBRARY_DEBUG
                                              ${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DEBUG
                                              ${_PYTHON_PREFIX}_INCLUDE_DIR)
  if (${_PYTHON_PREFIX}_FIND_REQUIRED_Development)
    list (APPEND _${_PYTHON_PREFIX}_REQUIRED_VARS ${_PYTHON_PREFIX}_LIBRARY
                                                  ${_PYTHON_PREFIX}_INCLUDE_DIR)
  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 python interpreter is found, use its location and version to ensure consistency
  # between interpreter and development environment
  unset (_${_PYTHON_PREFIX}_PREFIX)
  unset (_${_PYTHON_PREFIX}_EXEC_PREFIX)
  unset (_${_PYTHON_PREFIX}_BASE_EXEC_PREFIX)
  if (${_PYTHON_PREFIX}_Interpreter_FOUND)
    execute_process (COMMAND "${${_PYTHON_PREFIX}_EXECUTABLE}" -c
                             "import sys; from distutils import sysconfig; sys.stdout.write(sysconfig.EXEC_PREFIX)"
                     RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                     OUTPUT_VARIABLE _${_PYTHON_PREFIX}_EXEC_PREFIX
                     ERROR_QUIET
                     OUTPUT_STRIP_TRAILING_WHITESPACE)
    if (_${_PYTHON_PREFIX}_RESULT)
      unset (_${_PYTHON_PREFIX}_EXEC_PREFIX)
    endif()

    if (NOT ${_PYTHON_PREFIX}_FIND_VIRTUALENV STREQUAL "STANDARD")
      execute_process (COMMAND "${${_PYTHON_PREFIX}_EXECUTABLE}" -c
                               "import sys; from distutils import sysconfig; sys.stdout.write(sysconfig.BASE_EXEC_PREFIX)"
                       RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                       OUTPUT_VARIABLE _${_PYTHON_PREFIX}_BASE_EXEC_PREFIX
                       ERROR_QUIET
                       OUTPUT_STRIP_TRAILING_WHITESPACE)
      if (_${_PYTHON_PREFIX}_RESULT)
        unset (_${_PYTHON_PREFIX}_BASE_EXEC_PREFIX)
      endif()
    endif()
  endif()
  set (_${_PYTHON_PREFIX}_BASE_HINTS "${_${_PYTHON_PREFIX}_EXEC_PREFIX}" "${_${_PYTHON_PREFIX}_BASE_EXEC_PREFIX}" "${${_PYTHON_PREFIX}_ROOT_DIR}" ENV ${_PYTHON_PREFIX}_ROOT_DIR)
  set (_${_PYTHON_PREFIX}_HINTS ${_${_PYTHON_PREFIX}_BASE_HINTS})

  if (_${_PYTHON_PREFIX}_FIND_STRATEGY STREQUAL "LOCATION")
    set (_${_PYTHON_PREFIX}_CONFIG_NAMES)

    foreach (_${_PYTHON_PREFIX}_VERSION IN LISTS _${_PYTHON_PREFIX}_FIND_VERSIONS)
      _python_get_names (_${_PYTHON_PREFIX}_VERSION_NAMES VERSION ${_${_PYTHON_PREFIX}_VERSION} POSIX CONFIG)
      list (APPEND _${_PYTHON_PREFIX}_CONFIG_NAMES ${_${_PYTHON_PREFIX}_VERSION_NAMES})
    endforeach()

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

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

      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 (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()

  if (_${_PYTHON_PREFIX}_CONFIG)
    # retrieve root install directory
    execute_process (COMMAND "${_${_PYTHON_PREFIX}_CONFIG}" --prefix
                     RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                     OUTPUT_VARIABLE _${_PYTHON_PREFIX}_PREFIX
                     ERROR_QUIET
                     OUTPUT_STRIP_TRAILING_WHITESPACE)
    if (_${_PYTHON_PREFIX}_RESULT)
      # python-config is not usable
      unset (_${_PYTHON_PREFIX}_CONFIG CACHE)
    endif()
  endif()

  if (_${_PYTHON_PREFIX}_CONFIG)
    # enforce current ABI
    execute_process (COMMAND "${_${_PYTHON_PREFIX}_CONFIG}" --abiflags
                     RESULT_VARIABLE _${_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()

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

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

    execute_process (COMMAND "${_${_PYTHON_PREFIX}_CONFIG}" --configdir
                     RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                     OUTPUT_VARIABLE _${_PYTHON_PREFIX}_CONFIGDIR
                     ERROR_QUIET
                     OUTPUT_STRIP_TRAILING_WHITESPACE)
    if (NOT _${_PYTHON_PREFIX}_RESULT)
      list (APPEND _${_PYTHON_PREFIX}_HINTS "${_${_PYTHON_PREFIX}_CONFIGDIR}")
    endif()

    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)

    # retrieve runtime library
    if (${_PYTHON_PREFIX}_LIBRARY_RELEASE)
      get_filename_component (_${_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
                                    NO_SYSTEM_ENVIRONMENT_PATH
                                    NO_CMAKE_SYSTEM_PATH)
    endif()

    # retrieve include directory
    execute_process (COMMAND "${_${_PYTHON_PREFIX}_CONFIG}" --includes
                     RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                     OUTPUT_VARIABLE _${_PYTHON_PREFIX}_FLAGS
                     ERROR_QUIET
                     OUTPUT_STRIP_TRAILING_WHITESPACE)
    if (NOT _${_PYTHON_PREFIX}_RESULT)
      # retrieve include directory
      string (REGEX MATCHALL "-I[^ ]+" _${_PYTHON_PREFIX}_INCLUDE_DIRS "${_${_PYTHON_PREFIX}_FLAGS}")
      string (REPLACE "-I" "" _${_PYTHON_PREFIX}_INCLUDE_DIRS "${_${_PYTHON_PREFIX}_INCLUDE_DIRS}")
      list (REMOVE_DUPLICATES _${_PYTHON_PREFIX}_INCLUDE_DIRS)

      find_path (${_PYTHON_PREFIX}_INCLUDE_DIR
                 NAMES Python.h
                 HINTS ${_${_PYTHON_PREFIX}_INCLUDE_DIRS}
                 NO_SYSTEM_ENVIRONMENT_PATH
                 NO_CMAKE_SYSTEM_PATH)
    endif()
  endif()

  # Rely on HINTS and standard paths if config tool failed to locate artifacts
  if (NOT ${_PYTHON_PREFIX}_LIBRARY_RELEASE OR NOT ${_PYTHON_PREFIX}_INCLUDE_DIR)
    set (_${_PYTHON_PREFIX}_HINTS ${_${_PYTHON_PREFIX}_BASE_HINTS})

    if (_${_PYTHON_PREFIX}_FIND_STRATEGY STREQUAL "LOCATION")
      unset (_${_PYTHON_PREFIX}_LIB_NAMES)
      unset (_${_PYTHON_PREFIX}_LIB_NAMES_DEBUG)
      unset (_${_PYTHON_PREFIX}_FRAMEWORK_PATHS)
      unset (_${_PYTHON_PREFIX}_REGISTRY_PATHS)
      unset (_${_PYTHON_PREFIX}_PATH_SUFFIXES)

      foreach (_${_PYTHON_PREFIX}_LIB_VERSION IN LISTS _${_PYTHON_PREFIX}_FIND_VERSIONS)
        # library names
        _python_get_names (_${_PYTHON_PREFIX}_VERSION_NAMES VERSION ${_${_PYTHON_PREFIX}_LIB_VERSION} WIN32 POSIX LIBRARY)
        list (APPEND _${_PYTHON_PREFIX}_LIB_NAMES ${_${_PYTHON_PREFIX}_VERSION_NAMES})
        _python_get_names (_${_PYTHON_PREFIX}_VERSION_NAMES VERSION ${_${_PYTHON_PREFIX}_LIB_VERSION} WIN32 DEBUG)
        list (APPEND _${_PYTHON_PREFIX}_LIB_NAMES_DEBUG ${_${_PYTHON_PREFIX}_VERSION_NAMES})

        # Framework Paths
        _python_get_frameworks (_${_PYTHON_PREFIX}_VERSION_PATHS ${_${_PYTHON_PREFIX}_LIB_VERSION})
        list (APPEND _${_PYTHON_PREFIX}_FRAMEWORK_PATHS ${_${_PYTHON_PREFIX}_VERSION_PATHS})

        # Registry Paths
        _python_get_registries (_${_PYTHON_PREFIX}_VERSION_PATHS ${_${_PYTHON_PREFIX}_LIB_VERSION})
        list (APPEND _${_PYTHON_PREFIX}_REGISTRY_PATHS ${_${_PYTHON_PREFIX}_VERSION_PATHS})

        # Paths suffixes
        _python_get_path_suffixes (_${_PYTHON_PREFIX}_VERSION_PATHS VERSION ${_${_PYTHON_PREFIX}_LIB_VERSION} LIBRARY)
        list (APPEND _${_PYTHON_PREFIX}_PATH_SUFFIXES ${_${_PYTHON_PREFIX}_VERSION_PATHS})
      endforeach()

      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}_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}_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}
                    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 (${_PYTHON_PREFIX}_LIBRARY_RELEASE)
        # extract version from library name
        if (${_PYTHON_PREFIX}_LIBRARY_RELEASE MATCHES "python([23])([0-9]+)")
          set (_${_PYTHON_PREFIX}_VERSION "${CMAKE_MATCH_1}.${CMAKE_MATCH_2}")
        elseif (${_PYTHON_PREFIX}_LIBRARY_RELEASE MATCHES "python([23])\\.([0-9]+)")
          set (_${_PYTHON_PREFIX}_VERSION "${CMAKE_MATCH_1}.${CMAKE_MATCH_2}")
        endif()
      endif()

      if (WIN32)
        # search for debug library
        if (${_PYTHON_PREFIX}_LIBRARY_RELEASE)
          # use library location as a hint
          _python_get_names (_${_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)
        else()
          # search first in known locations
          if (_${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "FIRST")
            find_library (${_PYTHON_PREFIX}_LIBRARY_DEBUG
                          NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES_DEBUG}
                          NAMES_PER_DIR
                          HINTS ${_${_PYTHON_PREFIX}_HINTS}
                          PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                          PATH_SUFFIXES lib libs
                          NO_SYSTEM_ENVIRONMENT_PATH
                          NO_CMAKE_SYSTEM_PATH)
          endif()
          # search in all default paths
          find_library (${_PYTHON_PREFIX}_LIBRARY_DEBUG
                        NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES_DEBUG}
                        NAMES_PER_DIR
                        HINTS ${_${_PYTHON_PREFIX}_HINTS}
                        PATHS ${__${_PYTHON_PREFIX}_REGISTRY_PATHS}
                        PATH_SUFFIXES lib libs)

          # extract version from library name
          if (${_PYTHON_PREFIX}_LIBRARY_DEBUG MATCHES "python([23])([0-9]+)")
            set (_${_PYTHON_PREFIX}_VERSION "${CMAKE_MATCH_1}.${CMAKE_MATCH_2}")
          elseif (${_PYTHON_PREFIX}_LIBRARY_DEBUG MATCHES "python([23])\\.([0-9]+)")
            set (_${_PYTHON_PREFIX}_VERSION "${CMAKE_MATCH_1}.${CMAKE_MATCH_2}")
          endif()
        endif()
      endif()
    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 ${_${_PYTHON_PREFIX}_LIB_VERSION})
        _python_get_registries (_${_PYTHON_PREFIX}_REGISTRY_PATHS ${_${_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}_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}_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}
                      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 (WIN32)
          # search for debug library
          if (${_PYTHON_PREFIX}_LIBRARY_RELEASE)
            # use library location as a hint
            get_filename_component (_${_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)
          else()
            # search first in known locations
            if (_${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "FIRST")
              find_library (${_PYTHON_PREFIX}_LIBRARY_DEBUG
                            NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES_DEBUG}
                            NAMES_PER_DIR
                            HINTS ${_${_PYTHON_PREFIX}_HINTS}
                            PATHS ${_${_PYTHON_PREFIX}_REGISTRY_PATHS}
                            PATH_SUFFIXES lib libs
                            NO_SYSTEM_ENVIRONMENT_PATH
                            NO_CMAKE_SYSTEM_PATH)
            endif()
            # search in all default paths
            find_library (${_PYTHON_PREFIX}_LIBRARY_DEBUG
                          NAMES ${_${_PYTHON_PREFIX}_LIB_NAMES_DEBUG}
                          NAMES_PER_DIR
                          HINTS ${_${_PYTHON_PREFIX}_HINTS}
                          PATHS ${__${_PYTHON_PREFIX}_REGISTRY_PATHS}
                          PATH_SUFFIXES lib libs)
          endif()
        endif()

        if (${_PYTHON_PREFIX}_LIBRARY_RELEASE OR ${_PYTHON_PREFIX}_LIBRARY_DEBUG)
          set (_${_PYTHON_PREFIX}_VERSION ${_${_PYTHON_PREFIX}_LIB_VERSION})
          break()
        endif()
      endforeach()
    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()

    # Don't search for include dir if no library was founded
    if (${_PYTHON_PREFIX}_LIBRARY_RELEASE OR ${_PYTHON_PREFIX}_LIBRARY_DEBUG)
      unset (_${_PYTHON_PREFIX}_INCLUDE_HINTS)

      if (${_PYTHON_PREFIX}_EXECUTABLE)
        # pick up include directory from configuration
        execute_process (COMMAND "${${_PYTHON_PREFIX}_EXECUTABLE}" -c
                                 "import sys; import sysconfig; sys.stdout.write(sysconfig.get_path('include'))"
                         RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                         OUTPUT_VARIABLE _${_PYTHON_PREFIX}_PATH
                         ERROR_QUIET
                         OUTPUT_STRIP_TRAILING_WHITESPACE)
        if (NOT _${_PYTHON_PREFIX}_RESULT)
          file (TO_CMAKE_PATH "${_${_PYTHON_PREFIX}_PATH}" _${_PYTHON_PREFIX}_PATH)
          list (APPEND _${_PYTHON_PREFIX}_INCLUDE_HINTS "${_${_PYTHON_PREFIX}_PATH}")
        endif()
      endif()

      foreach (_${_PYTHON_PREFIX}_LIB IN ITEMS ${_PYTHON_PREFIX}_LIBRARY_RELEASE ${_PYTHON_PREFIX}_LIBRARY_DEBUG)
        if (${_${_PYTHON_PREFIX}_LIB})
          # Use the library's install prefix as a hint
          if (${_${_PYTHON_PREFIX}_LIB} MATCHES "^(.+/Frameworks/Python.framework/Versions/[0-9.]+)")
            list (APPEND _${_PYTHON_PREFIX}_INCLUDE_HINTS "${CMAKE_MATCH_1}")
          elseif (${_${_PYTHON_PREFIX}_LIB} MATCHES "^(.+)/lib(64|32)?/python[0-9.]+/config")
            list (APPEND _${_PYTHON_PREFIX}_INCLUDE_HINTS "${CMAKE_MATCH_1}")
          elseif (DEFINED CMAKE_LIBRARY_ARCHITECTURE AND ${_${_PYTHON_PREFIX}_LIB} 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 "${${_${_PYTHON_PREFIX}_LIB}}" DIRECTORY)
            get_filename_component (_${_PYTHON_PREFIX}_PREFIX "${_${_PYTHON_PREFIX}_PREFIX}" DIRECTORY)
            list (APPEND _${_PYTHON_PREFIX}_INCLUDE_HINTS "${_${_PYTHON_PREFIX}_PREFIX}")
          endif()
        endif()
      endforeach()
      list (REMOVE_DUPLICATES _${_PYTHON_PREFIX}_INCLUDE_HINTS)

      _python_get_frameworks (_${_PYTHON_PREFIX}_FRAMEWORK_PATHS ${_${_PYTHON_PREFIX}_VERSION})
      _python_get_registries (_${_PYTHON_PREFIX}_REGISTRY_PATHS ${_${_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.h
                   HINTS ${_${_PYTHON_PREFIX}_INCLUDE_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()

      if (WIN32 AND _${_PYTHON_PREFIX}_FIND_REGISTRY STREQUAL "FIRST")
        find_path (${_PYTHON_PREFIX}_INCLUDE_DIR
                   NAMES Python.h
                   HINTS ${_${_PYTHON_PREFIX}_INCLUDE_HINTS} ${_${_PYTHON_PREFIX}_HINTS}
                   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.h
                 HINTS ${_${_PYTHON_PREFIX}_INCLUDE_HINTS} ${_${_PYTHON_PREFIX}_HINTS}
                 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.h)
  endif()

  if (${_PYTHON_PREFIX}_INCLUDE_DIR)
    # retrieve version from header file
    file (STRINGS "${${_PYTHON_PREFIX}_INCLUDE_DIR}/patchlevel.h" _${_PYTHON_PREFIX}_VERSION
          REGEX "^#define[ \t]+PY_VERSION[ \t]+\"[^\"]+\"")
    string (REGEX REPLACE "^#define[ \t]+PY_VERSION[ \t]+\"([^\"]+)\".*" "\\1"
                          _${_PYTHON_PREFIX}_VERSION "${_${_PYTHON_PREFIX}_VERSION}")
    string (REGEX MATCHALL "[0-9]+" _${_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 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()
  endif()

  # define public variables
  include (${CMAKE_CURRENT_LIST_DIR}/../SelectLibraryConfigurations.cmake)
  select_library_configurations (${_PYTHON_PREFIX})
  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 "${CMAKE_SHARED_LIBRARY_SUFFIX}$"
        OR ${_PYTHON_PREFIX}_LIBRARY_RELEASE MATCHES "${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()

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

  mark_as_advanced (${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE
                    ${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DEBUG
                    ${_PYTHON_PREFIX}_INCLUDE_DIR)

  if ((${_PYTHON_PREFIX}_LIBRARY_RELEASE OR ${_PYTHON_PREFIX}_LIBRARY_DEBUG)
      AND ${_PYTHON_PREFIX}_INCLUDE_DIR)
    if (${_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})
        set (${_PYTHON_PREFIX}_Development_FOUND TRUE)
      endif()
    elseif (${_PYTHON_PREFIX}_VERSION_MAJOR VERSION_EQUAL _${_PYTHON_PREFIX}_REQUIRED_VERSION_MAJOR)
      set (${_PYTHON_PREFIX}_Development_FOUND TRUE)
    endif()
  endif()

  # 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()
endif()

if ("NumPy" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS AND ${_PYTHON_PREFIX}_Interpreter_FOUND)
  list (APPEND _${_PYTHON_PREFIX}_CACHED_VARS ${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR)
  if (${_PYTHON_PREFIX}_FIND_REQUIRED_NumPy)
    list (APPEND _${_PYTHON_PREFIX}_REQUIRED_VARS ${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR)
  endif()
  execute_process(
      COMMAND "${${_PYTHON_PREFIX}_EXECUTABLE}" -c
              "from __future__ import print_function\ntry: import numpy; print(numpy.get_include(), end='')\nexcept:pass\n"
      RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
      OUTPUT_VARIABLE _${_PYTHON_PREFIX}_NumPy_PATH
      ERROR_QUIET
      OUTPUT_STRIP_TRAILING_WHITESPACE)
  if (NOT _${_PYTHON_PREFIX}_RESULT)
    find_path(${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR
              NAMES "numpy/arrayobject.h" "numpy/numpyconfig.h"
              HINTS "${_${_PYTHON_PREFIX}_NumPy_PATH}"
              NO_DEFAULT_PATH)
  endif()
  if(${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR)
    set(${_PYTHON_PREFIX}_NumPy_INCLUDE_DIRS "${${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR}")
    set(${_PYTHON_PREFIX}_NumPy_FOUND TRUE)
  endif()
  if(${_PYTHON_PREFIX}_NumPy_FOUND)
    execute_process(
            COMMAND "${${_PYTHON_PREFIX}_EXECUTABLE}" -c
            "from __future__ import print_function\ntry: import numpy; print(numpy.__version__, end='')\nexcept:pass\n"
            RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
            OUTPUT_VARIABLE _${_PYTHON_PREFIX}_NumPy_VERSION)
    if (NOT _${_PYTHON_PREFIX}_RESULT)
       set(${_PYTHON_PREFIX}_NumPy_VERSION "${_${_PYTHON_PREFIX}_NumPy_VERSION}")
    endif()
  endif()
  # final step: set NumPy founded only if Development component is founded as well
  if (NOT ${_PYTHON_PREFIX}_Development_FOUND)
    set(${_PYTHON_PREFIX}_NumPy_FOUND FALSE)
  endif()
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()

include (${CMAKE_CURRENT_LIST_DIR}/../FindPackageHandleStandardArgs.cmake)
find_package_handle_standard_args (${_PYTHON_PREFIX}
                                   REQUIRED_VARS ${_${_PYTHON_PREFIX}_REQUIRED_VARS}
                                   VERSION_VAR ${_PYTHON_PREFIX}_VERSION
                                   HANDLE_COMPONENTS)

# 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" IN_LIST ${_PYTHON_PREFIX}_FIND_COMPONENTS
      AND ${_PYTHON_PREFIX}_Development_FOUND)

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

      add_library (${__name} ${_${_PYTHON_PREFIX}_LIBRARY_TYPE} IMPORTED)

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

      if ((${_PYTHON_PREFIX}_LIBRARY_RELEASE AND ${_PYTHON_PREFIX}_RUNTIME_LIBRARY_RELEASE)
          OR (${_PYTHON_PREFIX}_LIBRARY_DEBUG AND ${_PYTHON_PREFIX}_RUNTIME_LIBRARY_DEBUG))
        # System manage shared libraries in two parts: import and runtime
        if (${_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}_LIBRARY}"
                                            IMPORTED_LOCATION "${${_PYTHON_PREFIX}_RUNTIME_LIBRARY}")
        endif()
      else()
        if (${_PYTHON_PREFIX}_LIBRARY_RELEASE AND ${_PYTHON_PREFIX}_LIBRARY_DEBUG)
          set_property (TARGET ${_PYTHON_PREFIX}::Python PROPERTY IMPORTED_CONFIGURATIONS RELEASE DEBUG)
          set_target_properties (${__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}")
        endif()
      endif()

      if (_${_PYTHON_PREFIX}_CONFIG AND _${_PYTHON_PREFIX}_LIBRARY_TYPE STREQUAL "STATIC")
        # extend link information with dependent libraries
        execute_process (COMMAND "${_${_PYTHON_PREFIX}_CONFIG}" --ldflags
                         RESULT_VARIABLE _${_PYTHON_PREFIX}_RESULT
                         OUTPUT_VARIABLE _${_PYTHON_PREFIX}_FLAGS
                         ERROR_QUIET
                         OUTPUT_STRIP_TRAILING_WHITESPACE)
        if (NOT _${_PYTHON_PREFIX}_RESULT)
          string (REGEX MATCHALL "-[Ll][^ ]+" _${_PYTHON_PREFIX}_LINK_LIBRARIES "${_${_PYTHON_PREFIX}_FLAGS}")
          # remove elements relative to python library itself
          list (FILTER _${_PYTHON_PREFIX}_LINK_LIBRARIES EXCLUDE REGEX "-lpython")
          foreach (_${_PYTHON_PREFIX}_DIR IN LISTS ${_PYTHON_PREFIX}_LIBRARY_DIRS)
            list (FILTER _${_PYTHON_PREFIX}_LINK_LIBRARIES EXCLUDE REGEX "-L${${_PYTHON_PREFIX}_DIR}")
          endforeach()
          set_property (TARGET ${__name}
                        PROPERTY INTERFACE_LINK_LIBRARIES ${_${_PYTHON_PREFIX}_LINK_LIBRARIES})
        endif()
      endif()
    endmacro()

    if (NOT TARGET ${_PYTHON_PREFIX}::Python)
      __python_import_library (${_PYTHON_PREFIX}::Python)
    endif()

    if (NOT TARGET ${_PYTHON_PREFIX}::Module)
      if (CMAKE_SYSTEM_NAME MATCHES "^(Windows.*|CYGWIN|MSYS)$")
        # 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 (${_PYTHON_PREFIX}::Module)
      else()
        add_library (${_PYTHON_PREFIX}::Module INTERFACE IMPORTED)
        set_property (TARGET ${_PYTHON_PREFIX}::Module
                      PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${${_PYTHON_PREFIX}_INCLUDE_DIR}")

        # 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" "" "")

      unset (type)
      if (NOT (PYTHON_ADD_LIBRARY_STATIC
            OR PYTHON_ADD_LIBRARY_SHARED
            OR PYTHON_ADD_LIBRARY_MODULE))
        set (type MODULE)
      endif()
      add_library (${name} ${type} ${ARGN})

      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 ${name} PROPERTY SUFFIX ".pyd")
        endif()
      else()
        target_link_libraries (${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 ${_PYTHON_PREFIX}::NumPy
                  PROPERTY INTERFACE_INCLUDE_DIRECTORIES "${${_PYTHON_PREFIX}_NumPy_INCLUDE_DIR}")
    target_link_libraries (${_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()

unset (_${_PYTHON_PREFIX}_CONFIG CACHE)