#?Autodetecting?setup.py?script?for?building?the?Python?extensions
#

import?sys?os?importlib.machinery?re?optparse
from?glob?import?glob
import?importlib._bootstrap
import?importlib.util
import?sysconfig

from?distutils?import?log
from?distutils.errors?import?*
from?distutils.core?import?Extension?setup
from?distutils.command.build_ext?import?build_ext
from?distutils.command.install?import?install
from?distutils.command.install_lib?import?install_lib
from?distutils.command.build_scripts?import?build_scripts
from?distutils.spawn?import?find_executable

cross_compiling?=?“_PYTHON_HOST_PLATFORM“?in?os.environ

#?Add?special?CFLAGS?reserved?for?building?the?interpreter?and?the?stdlib
#?modules?（Issue?#21121）.
cflags?=?sysconfig.get_config_var（‘CFLAGS‘）
py_cflags_nodist?=?sysconfig.get_config_var（‘PY_CFLAGS_NODIST‘）
sysconfig.get_config_vars（）[‘CFLAGS‘]?=?cflags?+?‘?‘?+?py_cflags_nodist

class?Dummy:
????“““Hack?for?parallel?build“““
????ProcessPoolExecutor?=?None
sys.modules[‘concurrent.futures.process‘]?=?Dummy

def?get_platform（）:
????#?cross?build
????if?“_PYTHON_HOST_PLATFORM“?in?os.environ:
????????return?os.environ[“_PYTHON_HOST_PLATFORM“]
????#?Get?value?of?sys.platform
????if?sys.platform.startswith（‘osf1‘）:
????????return?‘osf1‘
????return?sys.platform
host_platform?=?get_platform（）

#?Were?we?compiled?--with-pydebug?or?with?#define?Py_DEBUG?
COMPILED_WITH_PYDEBUG?=?（‘--with-pydebug‘?in?sysconfig.get_config_var（“CONFIG_ARGS“））

#?This?global?variable?is?used?to?hold?the?list?of?modules?to?be?disabled.
disabled_module_list?=?[]

def?add_dir_to_list（dirlist?dir）:
????“““Add?the?directory?‘dir‘?to?the?list?‘dirlist‘?（after?any?relative
????directories）?if:

????1）?‘dir‘?is?not?already?in?‘dirlist‘
????2）?‘dir‘?actually?exists?and?is?a?directory.
????“““
????if?dir?is?None?or?not?os.path.isdir（dir）?or?dir?in?dirlist:
????????return
????for?i?path?in?enumerate（dirlist）:
????????if?not?os.path.isabs（path）:
????????????dirlist.insert（i?+?1?dir）
????????????return
????dirlist.insert（0?dir）

def?sysroot_paths（make_vars?subdirs）:
????“““Get?the?paths?of?sysroot?sub-directories.

????*?make_vars:?a?sequence?of?names?of?variables?of?the?Makefile?where
??????sysroot?may?be?set.
????*?subdirs:?a?sequence?of?names?of?subdirectories?used?as?the?location?for
??????headers?or?libraries.
????“““

????dirs?=?[]
????for?var_name?in?make_vars:
????????var?=?sysconfig.get_config_var（var_name）
????????if?var?is?not?None:
????????????m?=?re.search（r‘--sysroot=（[^“]\S*|“[^“]+“）‘?var）
????????????if?m?is?not?None:
????????????????sysroot?=?m.group（1）.strip（‘“‘）
????????????????for?subdir?in?subdirs:
????????????????????if?os.path.isabs（subdir）:
????????????????????????subdir?=?subdir[1:]
????????????????????path?=?os.path.join（sysroot?subdir）
????????????????????if?os.path.isdir（path）:
????????????????????????dirs.append（path）
????????????????break
????return?dirs

def?macosx_sdk_root（）:
????“““
????Return?the?directory?of?the?current?OSX?SDK
????or?‘/‘