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ned-deily bpo-19960 : Fix building of zlib on macOS without installed headers (G… da7f6db

Jul 1, 2019

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

	__version__ = "$Revision$"

	import sys, os, imp, re, optparse
	from glob import glob
	from platform import machine as platform_machine
	import sysconfig

	from distutils import log
	from distutils import text_file
	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.spawn import find_executable

	cross_compiling = "_PYTHON_HOST_PLATFORM" in os.environ

	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' (at the front) if
	1) 'dir' is not already in 'dirlist'
	2) 'dir' actually exists, and is a directory."""
	if dir is not None and dir not in dirlist:
	if host_platform == 'darwin' and is_macosx_sdk_path(dir):
	# If in a macOS SDK path, check relative to the SDK root
	dir_exists = os.path.isdir(
	os.path.join(macosx_sdk_root(), dir[1:]))
	else:
	dir_exists = os.path.isdir(dir)
	if dir_exists:
	dirlist.insert(0, dir)

	MACOS_SDK_ROOT = None

	def macosx_sdk_root():
	"""Return the directory of the current macOS SDK.

	If no SDK was explicitly configured, call the compiler to find which
	include files paths are being searched by default. Use '/' if the
	compiler is searching /usr/include (meaning system header files are
	installed) or use the root of an SDK if that is being searched.
	(The SDK may be supplied via Xcode or via the Command Line Tools).
	The SDK paths used by Apple-supplied tool chains depend on the
	setting of various variables; see the xcrun man page for more info.
	"""
	global MACOS_SDK_ROOT

	# If already called, return cached result.
	if MACOS_SDK_ROOT:
	return MACOS_SDK_ROOT

	cflags = sysconfig.get_config_var('CFLAGS')
	m = re.search(r'-isysroot\s+(\S+)', cflags)
	if m is not None:
	MACOS_SDK_ROOT = m.group(1)
	else:
	MACOS_SDK_ROOT = '/'
	cc = sysconfig.get_config_var('CC')
	tmpfile = '/tmp/setup_sdk_root.%d' % os.getpid()
	try:
	os.unlink(tmpfile)
	except:
	pass
	ret = os.system('%s -E -v - </dev/null 2>%s 1>/dev/null' % (cc, tmpfile))
	in_incdirs = False
	try:
	if ret >> 8 == 0:
	with open(tmpfile) as fp:
	for line in fp.readlines():
	if line.startswith("#include <...>"):
	in_incdirs = True
	elif line.startswith("End of search list"):
	in_incdirs = False
	elif in_incdirs:
	line = line.strip()
	if line == '/usr/include':
	MACOS_SDK_ROOT = '/'
	elif line.endswith(".sdk/usr/include"):
	MACOS_SDK_ROOT = line[:-12]
	finally:
	os.unlink(tmpfile)

	return MACOS_SDK_ROOT

	def is_macosx_sdk_path(path):
	"""
	Returns True if 'path' can be located in an OSX SDK
	"""
	return ( (path.startswith('/usr/') and not path.startswith('/usr/local'))
	or path.startswith('/System/')
	or path.startswith('/Library/') )

	def find_file(filename, std_dirs, paths):
	"""Searches for the directory where a given file is located,
	and returns a possibly-empty list of additional directories, or None
	if the file couldn't be found at all.

	'filename' is the name of a file, such as readline.h or libcrypto.a.
	'std_dirs' is the list of standard system directories; if the
	file is found in one of them, no additional directives are needed.
	'paths' is a list of additional locations to check; if the file is
	found in one of them, the resulting list will contain the directory.
	"""
	if host_platform == 'darwin':
	# Honor the MacOSX SDK setting when one was specified.
	# An SDK is a directory with the same structure as a real
	# system, but with only header files and libraries.
	sysroot = macosx_sdk_root()

	# Check the standard locations
	for dir in std_dirs:
	f = os.path.join(dir, filename)

	if host_platform == 'darwin' and is_macosx_sdk_path(dir):
	f = os.path.join(sysroot, dir[1:], filename)

	if os.path.exists(f): return []

	# Check the additional directories
	for dir in paths:
	f = os.path.join(dir, filename)

	if host_platform == 'darwin' and is_macosx_sdk_path(dir):
	f = os.path.join(sysroot, dir[1:], filename)

	if os.path.exists(f):
	return [dir]

	# Not found anywhere
	return None

	def find_library_file(compiler, libname, std_dirs, paths):
	result = compiler.find_library_file(std_dirs + paths, libname)
	if result is None:
	return None

	if host_platform == 'darwin':
	sysroot = macosx_sdk_root()

	# Check whether the found file is in one of the standard directories
	dirname = os.path.dirname(result)
	for p in std_dirs:
	# Ensure path doesn't end with path separator
	p = p.rstrip(os.sep)

	if host_platform == 'darwin' and is_macosx_sdk_path(p):
	# Note that, as of Xcode 7, Apple SDKs may contain textual stub
	# libraries with .tbd extensions rather than the normal .dylib
	# shared libraries installed in /. The Apple compiler tool
	# chain handles this transparently but it can cause problems
	# for programs that are being built with an SDK and searching
	# for specific libraries. Distutils find_library_file() now
	# knows to also search for and return .tbd files. But callers
	# of find_library_file need to keep in mind that the base filename
	# of the returned SDK library file might have a different extension
	# from that of the library file installed on the running system,
	# for example:
	# /Applications/Xcode.app/Contents/Developer/Platforms/
	# MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/
	# usr/lib/libedit.tbd
	# vs
	# /usr/lib/libedit.dylib
	if os.path.join(sysroot, p[1:]) == dirname:
	return [ ]

	if p == dirname:
	return [ ]

	# Otherwise, it must have been in one of the additional directories,
	# so we have to figure out which one.
	for p in paths:
	# Ensure path doesn't end with path separator
	p = p.rstrip(os.sep)

	if host_platform == 'darwin' and is_macosx_sdk_path(p):
	if os.path.join(sysroot, p[1:]) == dirname:
	return [ p ]

	if p == dirname:
	return [p]
	else:
	assert False, "Internal error: Path not found in std_dirs or paths"

	def module_enabled(extlist, modname):
	"""Returns whether the module 'modname' is present in the list
	of extensions 'extlist'."""
	extlist = [ext for ext in extlist if ext.name == modname]
	return len(extlist)

	def find_module_file(module, dirlist):
	"""Find a module in a set of possible folders. If it is not found
	return the unadorned filename"""
	list = find_file(module, [], dirlist)
	if not list:
	return module
	if len(list) > 1:
	log.info("WARNING: multiple copies of %s found"%module)
	return os.path.join(list[0], module)

	class PyBuildExt(build_ext):

	def __init__(self, dist):
	build_ext.__init__(self, dist)
	self.failed = []

	def build_extensions(self):

	# Detect which modules should be compiled
	missing = self.detect_modules()

	# Remove modules that are present on the disabled list
	extensions = [ext for ext in self.extensions
	if ext.name not in disabled_module_list]
	# move ctypes to the end, it depends on other modules
	ext_map = dict((ext.name, i) for i, ext in enumerate(extensions))
	if "_ctypes" in ext_map:
	ctypes = extensions.pop(ext_map["_ctypes"])
	extensions.append(ctypes)
	self.extensions = extensions

	# Fix up the autodetected modules, prefixing all the source files
	# with Modules/ and adding Python's include directory to the path.
	(srcdir,) = sysconfig.get_config_vars('srcdir')
	if not srcdir:
	# Maybe running on Windows but not using CYGWIN?
	raise ValueError("No source directory; cannot proceed.")
	srcdir = os.path.abspath(srcdir)
	moddirlist = [os.path.join(srcdir, 'Modules')]

	# Platform-dependent module source and include directories
	incdirlist = []

	if host_platform == 'darwin' and ("--disable-toolbox-glue" not in
	sysconfig.get_config_var("CONFIG_ARGS")):
	# Mac OS X also includes some mac-specific modules
	macmoddir = os.path.join(srcdir, 'Mac/Modules')
	moddirlist.append(macmoddir)
	incdirlist.append(os.path.join(srcdir, 'Mac/Include'))

	# Fix up the paths for scripts, too
	self.distribution.scripts = [os.path.join(srcdir, filename)
	for filename in self.distribution.scripts]

	# Python header files
	headers = [sysconfig.get_config_h_filename()]
	headers += glob(os.path.join(sysconfig.get_path('include'), "*.h"))
	for ext in self.extensions[:]:
	ext.sources = [ find_module_file(filename, moddirlist)
	for filename in ext.sources ]
	if ext.depends is not None:
	ext.depends = [find_module_file(filename, moddirlist)
	for filename in ext.depends]
	else:
	ext.depends = []
	# re-compile extensions if a header file has been changed
	ext.depends.extend(headers)

	# platform specific include directories
	ext.include_dirs.extend(incdirlist)

	# If a module has already been built statically,
	# don't build it here
	if ext.name in sys.builtin_module_names:
	self.extensions.remove(ext)

	# Parse Modules/Setup and Modules/Setup.local to figure out which
	# modules are turned on in the file.
	remove_modules = []
	for filename in ('Modules/Setup', 'Modules/Setup.local'):
	input = text_file.TextFile(filename, join_lines=1)
	while 1:
	line = input.readline()
	if not line: break
	line = line.split()
	remove_modules.append(line[0])
	input.close()

	for ext in self.extensions[:]:
	if ext.name in remove_modules:
	self.extensions.remove(ext)

	# When you run "make CC=altcc" or something similar, you really want
	# those environment variables passed into the setup.py phase. Here's
	# a small set of useful ones.
	compiler = os.environ.get('CC')
	args = {}
	# unfortunately, distutils doesn't let us provide separate C and C++
	# compilers
	if compiler is not None:
	(ccshared,cflags) = sysconfig.get_config_vars('CCSHARED','CFLAGS')
	args['compiler_so'] = compiler + ' ' + ccshared + ' ' + cflags
	self.compiler.set_executables(**args)

	build_ext.build_extensions(self)

	longest = 0
	if self.extensions:
	longest = max([len(e.name) for e in self.extensions])
	if self.failed:
	longest = max(longest, max([len(name) for name in self.failed]))

	def print_three_column(lst):
	lst.sort(key=str.lower)
	# guarantee zip() doesn't drop anything
	while len(lst) % 3:
	lst.append("")
	for e, f, g in zip(lst[::3], lst[1::3], lst[2::3]):
	print "%-s %-s %-*s" % (longest, e, longest, f,
	longest, g)

	if missing:
	print
	print ("Python build finished, but the necessary bits to build "
	"these modules were not found:")
	print_three_column(missing)
	print ("To find the necessary bits, look in setup.py in"
	" detect_modules() for the module's name.")
	print

	if self.failed:
	failed = self.failed[:]
	print
	print "Failed to build these modules:"
	print_three_column(failed)
	print

	def build_extension(self, ext):

	if ext.name == '_ctypes':
	if not self.configure_ctypes(ext):
	return

	try:
	build_ext.build_extension(self, ext)
	except (CCompilerError, DistutilsError), why:
	self.announce('WARNING: building of extension "%s" failed: %s' %
	(ext.name, sys.exc_info()[1]))
	self.failed.append(ext.name)
	return
	# Workaround for Mac OS X: The Carbon-based modules cannot be
	# reliably imported into a command-line Python
	if 'Carbon' in ext.extra_link_args:
	self.announce(
	'WARNING: skipping import check for Carbon-based "%s"' %
	ext.name)
	return

	if host_platform == 'darwin' and (
	sys.maxint > 2**32 and '-arch' in ext.extra_link_args):
	# Don't bother doing an import check when an extension was
	# build with an explicit '-arch' flag on OSX. That's currently
	# only used to build 32-bit only extensions in a 4-way
	# universal build and loading 32-bit code into a 64-bit
	# process will fail.
	self.announce(
	'WARNING: skipping import check for "%s"' %
	ext.name)
	return

	# Workaround for Cygwin: Cygwin currently has fork issues when many
	# modules have been imported
	if host_platform == 'cygwin':
	self.announce('WARNING: skipping import check for Cygwin-based "%s"'
	% ext.name)
	return
	ext_filename = os.path.join(
	self.build_lib,
	self.get_ext_filename(self.get_ext_fullname(ext.name)))

	# Don't try to load extensions for cross builds
	if cross_compiling:
	return

	try:
	imp.load_dynamic(ext.name, ext_filename)
	except ImportError, why:
	self.failed.append(ext.name)
	self.announce('*** WARNING: renaming "%s" since importing it'
	' failed: %s' % (ext.name, why), level=3)
	assert not self.inplace
	basename, tail = os.path.splitext(ext_filename)
	newname = basename + "_failed" + tail
	if os.path.exists(newname):
	os.remove(newname)
	os.rename(ext_filename, newname)

	# XXX -- This relies on a Vile HACK in
	# distutils.command.build_ext.build_extension(). The
	# _built_objects attribute is stored there strictly for
	# use here.
	# If there is a failure, _built_objects may not be there,
	# so catch the AttributeError and move on.
	try:
	for filename in self._built_objects:
	os.remove(filename)
	except AttributeError:
	self.announce('unable to remove files (ignored)')
	except:
	exc_type, why, tb = sys.exc_info()
	self.announce('*** WARNING: importing extension "%s" '
	'failed with %s: %s' % (ext.name, exc_type, why),
	level=3)
	self.failed.append(ext.name)

	def add_multiarch_paths(self):
	# Debian/Ubuntu multiarch support.
	# https://wiki.ubuntu.com/MultiarchSpec
	cc = sysconfig.get_config_var('CC')
	tmpfile = os.path.join(self.build_temp, 'multiarch')
	if not os.path.exists(self.build_temp):
	os.makedirs(self.build_temp)
	ret = os.system(
	'%s -print-multiarch > %s 2> /dev/null' % (cc, tmpfile))
	multiarch_path_component = ''
	try:
	if ret >> 8 == 0:
	with open(tmpfile) as fp:
	multiarch_path_component = fp.readline().strip()
	finally:
	os.unlink(tmpfile)

	if multiarch_path_component != '':
	add_dir_to_list(self.compiler.library_dirs,
	'/usr/lib/' + multiarch_path_component)
	add_dir_to_list(self.compiler.include_dirs,
	'/usr/include/' + multiarch_path_component)
	return

	if not find_executable('dpkg-architecture'):
	return
	opt = ''
	if cross_compiling:
	opt = '-t' + sysconfig.get_config_var('HOST_GNU_TYPE')
	tmpfile = os.path.join(self.build_temp, 'multiarch')
	if not os.path.exists(self.build_temp):
	os.makedirs(self.build_temp)
	ret = os.system(
	'dpkg-architecture %s -qDEB_HOST_MULTIARCH > %s 2> /dev/null' %
	(opt, tmpfile))
	try:
	if ret >> 8 == 0:
	with open(tmpfile) as fp:
	multiarch_path_component = fp.readline().strip()
	add_dir_to_list(self.compiler.library_dirs,
	'/usr/lib/' + multiarch_path_component)
	add_dir_to_list(self.compiler.include_dirs,
	'/usr/include/' + multiarch_path_component)
	finally:
	os.unlink(tmpfile)

	def add_gcc_paths(self):
	gcc = sysconfig.get_config_var('CC')
	tmpfile = os.path.join(self.build_temp, 'gccpaths')
	if not os.path.exists(self.build_temp):
	os.makedirs(self.build_temp)
	ret = os.system('%s -E -v - </dev/null 2>%s 1>/dev/null' % (gcc, tmpfile))
	is_gcc = False
	in_incdirs = False
	inc_dirs = []
	lib_dirs = []
	try:
	if ret >> 8 == 0:
	with open(tmpfile) as fp:
	for line in fp.readlines():
	if line.startswith("gcc version"):
	is_gcc = True
	elif line.startswith("#include <...>"):
	in_incdirs = True
	elif line.startswith("End of search list"):
	in_incdirs = False
	elif is_gcc and line.startswith("LIBRARY_PATH"):
	for d in line.strip().split("=")[1].split(":"):
	d = os.path.normpath(d)
	if '/gcc/' not in d:
	add_dir_to_list(self.compiler.library_dirs,
	d)
	elif is_gcc and in_incdirs and '/gcc/' not in line:
	add_dir_to_list(self.compiler.include_dirs,
	line.strip())
	finally:
	os.unlink(tmpfile)

	def detect_modules(self):
	# Ensure that /usr/local is always used
	if not cross_compiling:
	add_dir_to_list(self.compiler.library_dirs, '/usr/local/lib')
	add_dir_to_list(self.compiler.include_dirs, '/usr/local/include')
	if cross_compiling:
	self.add_gcc_paths()
	self.add_multiarch_paths()

	# Add paths specified in the environment variables LDFLAGS and
	# CPPFLAGS for header and library files.
	# We must get the values from the Makefile and not the environment
	# directly since an inconsistently reproducible issue comes up where
	# the environment variable is not set even though the value were passed
	# into configure and stored in the Makefile (issue found on OS X 10.3).
	for env_var, arg_name, dir_list in (
	('LDFLAGS', '-R', self.compiler.runtime_library_dirs),
	('LDFLAGS', '-L', self.compiler.library_dirs),
	('CPPFLAGS', '-I', self.compiler.include_dirs)):
	env_val = sysconfig.get_config_var(env_var)
	if env_val:
	# To prevent optparse from raising an exception about any
	# options in env_val that it doesn't know about we strip out
	# all double dashes and any dashes followed by a character
	# that is not for the option we are dealing with.
	#
	# Please note that order of the regex is important! We must
	# strip out double-dashes first so that we don't end up with
	# substituting "--Long" to "-Long" and thus lead to "ong" being
	# used for a library directory.
	env_val = re.sub(r'(^\|\s+)-(-\|(?!%s))' % arg_name[1],
	' ', env_val)
	parser = optparse.OptionParser()
	# Make sure that allowing args interspersed with options is
	# allowed
	parser.allow_interspersed_args = True
	parser.error = lambda msg: None
	parser.add_option(arg_name, dest="dirs", action="append")
	options = parser.parse_args(env_val.split())[0]
	if options.dirs:
	for directory in reversed(options.dirs):
	add_dir_to_list(dir_list, directory)

	if os.path.normpath(sys.prefix) != '/usr' \
	and not sysconfig.get_config_var('PYTHONFRAMEWORK'):
	# OSX note: Don't add LIBDIR and INCLUDEDIR to building a framework
	# (PYTHONFRAMEWORK is set) to avoid # linking problems when
	# building a framework with different architectures than
	# the one that is currently installed (issue #7473)
	add_dir_to_list(self.compiler.library_dirs,
	sysconfig.get_config_var("LIBDIR"))
	add_dir_to_list(self.compiler.include_dirs,
	sysconfig.get_config_var("INCLUDEDIR"))

	try:
	have_unicode = unicode
	except NameError:
	have_unicode = 0

	# lib_dirs and inc_dirs are used to search for files;
	# if a file is found in one of those directories, it can
	# be assumed that no additional -I,-L directives are needed.
	inc_dirs = self.compiler.include_dirs[:]
	lib_dirs = self.compiler.library_dirs[:]
	if not cross_compiling:
	for d in (
	'/usr/include',
	):
	add_dir_to_list(inc_dirs, d)
	for d in (
	'/lib64', '/usr/lib64',
	'/lib', '/usr/lib',
	):
	add_dir_to_list(lib_dirs, d)
	exts = []
	missing = []

	config_h = sysconfig.get_config_h_filename()
	config_h_vars = sysconfig.parse_config_h(open(config_h))

	srcdir = sysconfig.get_config_var('srcdir')

	# Check for AtheOS which has libraries in non-standard locations
	if host_platform == 'atheos':
	lib_dirs += ['/system/libs', '/atheos/autolnk/lib']
	lib_dirs += os.getenv('LIBRARY_PATH', '').split(os.pathsep)
	inc_dirs += ['/system/include', '/atheos/autolnk/include']
	inc_dirs += os.getenv('C_INCLUDE_PATH', '').split(os.pathsep)

	# OSF/1 and Unixware have some stuff in /usr/ccs/lib (like -ldb)
	if host_platform in ['osf1', 'unixware7', 'openunix8']:
	lib_dirs += ['/usr/ccs/lib']

	# HP-UX11iv3 keeps files in lib/hpux folders.
	if host_platform == 'hp-ux11':
	lib_dirs += ['/usr/lib/hpux64', '/usr/lib/hpux32']

	if host_platform == 'darwin':
	# This should work on any unixy platform ;-)
	# If the user has bothered specifying additional -I and -L flags
	# in OPT and LDFLAGS we might as well use them here.
	# NOTE: using shlex.split would technically be more correct, but
	# also gives a bootstrap problem. Let's hope nobody uses directories
	# with whitespace in the name to store libraries.
	cflags, ldflags = sysconfig.get_config_vars(
	'CFLAGS', 'LDFLAGS')
	for item in cflags.split():
	if item.startswith('-I'):
	inc_dirs.append(item[2:])

	for item in ldflags.split():
	if item.startswith('-L'):
	lib_dirs.append(item[2:])

	# Check for MacOS X, which doesn't need libm.a at all
	math_libs = ['m']
	if host_platform in ['darwin', 'beos']:
	math_libs = []

	# XXX Omitted modules: gl, pure, dl, SGI-specific modules

	#
	# The following modules are all pretty straightforward, and compile
	# on pretty much any POSIXish platform.
	#

	# Some modules that are normally always on:
	#exts.append( Extension('_weakref', ['_weakref.c']) )

	# array objects
	exts.append( Extension('array', ['arraymodule.c']) )

	shared_math = 'Modules/_math.o'
	# complex math library functions
	exts.append( Extension('cmath', ['cmathmodule.c'],
	extra_objects=[shared_math],
	depends=['_math.h', shared_math],
	libraries=math_libs) )
	# math library functions, e.g. sin()
	exts.append( Extension('math', ['mathmodule.c'],
	extra_objects=[shared_math],
	depends=['_math.h', shared_math],
	libraries=math_libs) )
	# fast string operations implemented in C
	exts.append( Extension('strop', ['stropmodule.c']) )
	# time operations and variables
	exts.append( Extension('time', ['timemodule.c'],
	libraries=math_libs) )
	exts.append( Extension('datetime', ['datetimemodule.c', 'timemodule.c'],
	libraries=math_libs) )
	# fast iterator tools implemented in C
	exts.append( Extension("itertools", ["itertoolsmodule.c"]) )
	# code that will be builtins in the future, but conflict with the
	# current builtins
	exts.append( Extension('future_builtins', ['future_builtins.c']) )
	# random number generator implemented in C
	exts.append( Extension("_random", ["_randommodule.c"]) )
	# high-performance collections
	exts.append( Extension("_collections", ["_collectionsmodule.c"]) )
	# bisect
	exts.append( Extension("_bisect", ["_bisectmodule.c"]) )
	# heapq
	exts.append( Extension("_heapq", ["_heapqmodule.c"]) )
	# operator.add() and similar goodies
	exts.append( Extension('operator', ['operator.c']) )
	# Python 3.1 _io library
	exts.append( Extension("_io",
	["_io/bufferedio.c", "_io/bytesio.c", "_io/fileio.c",
	"_io/iobase.c", "_io/_iomodule.c", "_io/stringio.c", "_io/textio.c"],
	depends=["_io/_iomodule.h"], include_dirs=["Modules/_io"]))
	# _functools
	exts.append( Extension("_functools", ["_functoolsmodule.c"]) )
	# _json speedups
	exts.append( Extension("_json", ["_json.c"]) )
	# Python C API test module
	exts.append( Extension('_testcapi', ['_testcapimodule.c'],
	depends=['testcapi_long.h']) )
	# profilers (_lsprof is for cProfile.py)
	exts.append( Extension('_hotshot', ['_hotshot.c']) )
	exts.append( Extension('_lsprof', ['_lsprof.c', 'rotatingtree.c']) )
	# static Unicode character database
	if have_unicode:
	exts.append( Extension('unicodedata', ['unicodedata.c']) )
	else:
	missing.append('unicodedata')
	# access to ISO C locale support
	data = open('pyconfig.h').read()
	m = re.search(r"#sdefine\s+WITH_LIBINTL\s+1\s", data)
	if m is not None:
	locale_libs = ['intl']
	else:
	locale_libs = []
	if host_platform == 'darwin':
	locale_extra_link_args = ['-framework', 'CoreFoundation']
	else:
	locale_extra_link_args = []


	exts.append( Extension('_locale', ['_localemodule.c'],
	libraries=locale_libs,
	extra_link_args=locale_extra_link_args) )

	# Modules with some UNIX dependencies -- on by default:
	# (If you have a really backward UNIX, select and socket may not be
	# supported...)

	# fcntl(2) and ioctl(2)
	libs = []
	if (config_h_vars.get('FLOCK_NEEDS_LIBBSD', False)):
	# May be necessary on AIX for flock function
	libs = ['bsd']
	exts.append( Extension('fcntl', ['fcntlmodule.c'], libraries=libs) )
	# pwd(3)
	exts.append( Extension('pwd', ['pwdmodule.c']) )
	# grp(3)
	exts.append( Extension('grp', ['grpmodule.c']) )
	# spwd, shadow passwords
	if (config_h_vars.get('HAVE_GETSPNAM', False) or
	config_h_vars.get('HAVE_GETSPENT', False)):
	exts.append( Extension('spwd', ['spwdmodule.c']) )
	else:
	missing.append('spwd')

	# select(2); not on ancient System V
	exts.append( Extension('select', ['selectmodule.c']) )

	# Fred Drake's interface to the Python parser
	exts.append( Extension('parser', ['parsermodule.c']) )

	# cStringIO and cPickle
	exts.append( Extension('cStringIO', ['cStringIO.c']) )
	exts.append( Extension('cPickle', ['cPickle.c']) )

	# Memory-mapped files (also works on Win32).
	if host_platform not in ['atheos']:
	exts.append( Extension('mmap', ['mmapmodule.c']) )
	else:
	missing.append('mmap')

	# Lance Ellinghaus's syslog module
	# syslog daemon interface
	exts.append( Extension('syslog', ['syslogmodule.c']) )

	# George Neville-Neil's timing module:
	# Deprecated in PEP 4 http://www.python.org/peps/pep-0004.html
	# http://mail.python.org/pipermail/python-dev/2006-January/060023.html
	#exts.append( Extension('timing', ['timingmodule.c']) )

	#
	# Here ends the simple stuff. From here on, modules need certain
	# libraries, are platform-specific, or present other surprises.
	#

	# Multimedia modules
	# These don't work for 64-bit platforms!!!
	# These represent audio samples or images as strings:

	# Operations on audio samples
	# According to #993173, this one should actually work fine on
	# 64-bit platforms.
	exts.append( Extension('audioop', ['audioop.c']) )

	# Disabled on 64-bit platforms
	if sys.maxsize != 9223372036854775807L:
	# Operations on images
	exts.append( Extension('imageop', ['imageop.c']) )
	else:
	missing.extend(['imageop'])

	# readline
	do_readline = self.compiler.find_library_file(lib_dirs, 'readline')
	readline_termcap_library = ""
	curses_library = ""
	# Determine if readline is already linked against curses or tinfo.
	if do_readline and find_executable('ldd'):
	fp = os.popen("ldd %s" % do_readline)
	ldd_output = fp.readlines()
	ret = fp.close()
	if ret is None or ret >> 8 == 0:
	for ln in ldd_output:
	if 'curses' in ln:
	readline_termcap_library = re.sub(
	r'.lib(n?cursesw?)\.so.', r'\1', ln
	).rstrip()
	break
	if 'tinfo' in ln: # termcap interface split out from ncurses
	readline_termcap_library = 'tinfo'
	break
	# Issue 7384: If readline is already linked against curses,
	# use the same library for the readline and curses modules.
	if 'curses' in readline_termcap_library:
	curses_library = readline_termcap_library
	elif self.compiler.find_library_file(lib_dirs, 'ncursesw'):
	curses_library = 'ncursesw'
	elif self.compiler.find_library_file(lib_dirs, 'ncurses'):
	curses_library = 'ncurses'
	elif self.compiler.find_library_file(lib_dirs, 'curses'):
	curses_library = 'curses'

	if host_platform == 'darwin':
	os_release = int(os.uname()[2].split('.')[0])
	dep_target = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET')
	if (dep_target and
	(tuple(int(n) for n in dep_target.split('.')[0:2])
	< (10, 5) ) ):
	os_release = 8
	if os_release < 9:
	# MacOSX 10.4 has a broken readline. Don't try to build
	# the readline module unless the user has installed a fixed
	# readline package
	if find_file('readline/rlconf.h', inc_dirs, []) is None:
	do_readline = False
	if do_readline:
	if host_platform == 'darwin' and os_release < 9:
	# In every directory on the search path search for a dynamic
	# library and then a static library, instead of first looking
	# for dynamic libraries on the entire path.
	# This way a statically linked custom readline gets picked up
	# before the (possibly broken) dynamic library in /usr/lib.
	readline_extra_link_args = ('-Wl,-search_paths_first',)
	else:
	readline_extra_link_args = ()

	readline_libs = ['readline']
	if readline_termcap_library:
	pass # Issue 7384: Already linked against curses or tinfo.
	elif curses_library:
	readline_libs.append(curses_library)
	elif self.compiler.find_library_file(lib_dirs +
	['/usr/lib/termcap'],
	'termcap'):
	readline_libs.append('termcap')
	exts.append( Extension('readline', ['readline.c'],
	library_dirs=['/usr/lib/termcap'],
	extra_link_args=readline_extra_link_args,
	libraries=readline_libs) )
	else:
	missing.append('readline')

	# crypt module.

	if self.compiler.find_library_file(lib_dirs, 'crypt'):
	libs = ['crypt']
	else:
	libs = []
	exts.append( Extension('crypt', ['cryptmodule.c'], libraries=libs) )

	# CSV files
	exts.append( Extension('_csv', ['_csv.c']) )

	# socket(2)
	exts.append( Extension('_socket', ['socketmodule.c', 'timemodule.c'],
	depends=['socketmodule.h'],
	libraries=math_libs) )
	# Detect SSL support for the socket module (via _ssl)
	search_for_ssl_incs_in = [
	'/usr/local/ssl/include',
	'/usr/contrib/ssl/include/'
	]
	ssl_incs = find_file('openssl/ssl.h', inc_dirs,
	search_for_ssl_incs_in
	)
	if ssl_incs is not None:
	krb5_h = find_file('krb5.h', inc_dirs,
	['/usr/kerberos/include'])
	if krb5_h:
	ssl_incs += krb5_h
	ssl_libs = find_library_file(self.compiler, 'ssl',lib_dirs,
	['/usr/local/ssl/lib',
	'/usr/contrib/ssl/lib/'
	] )

	if (ssl_incs is not None and
	ssl_libs is not None):
	exts.append( Extension('_ssl', ['_ssl.c'],
	include_dirs = ssl_incs,
	library_dirs = ssl_libs,
	libraries = ['ssl', 'crypto'],
	depends = ['socketmodule.h']), )
	else:
	missing.append('_ssl')

	# find out which version of OpenSSL we have
	openssl_ver = 0
	openssl_ver_re = re.compile(
	'^\s#\sdefine\s+OPENSSL_VERSION_NUMBER\s+(0x[0-9a-fA-F]+)' )

	# look for the openssl version header on the compiler search path.
	opensslv_h = find_file('openssl/opensslv.h', [],
	inc_dirs + search_for_ssl_incs_in)
	if opensslv_h:
	name = os.path.join(opensslv_h[0], 'openssl/opensslv.h')
	if host_platform == 'darwin' and is_macosx_sdk_path(name):
	name = os.path.join(macosx_sdk_root(), name[1:])
	try:
	incfile = open(name, 'r')
	for line in incfile:
	m = openssl_ver_re.match(line)
	if m:
	openssl_ver = eval(m.group(1))
	except IOError, msg:
	print "IOError while reading opensshv.h:", msg
	pass

	min_openssl_ver = 0x00907000
	have_any_openssl = ssl_incs is not None and ssl_libs is not None
	have_usable_openssl = (have_any_openssl and
	openssl_ver >= min_openssl_ver)

	if have_any_openssl:
	if have_usable_openssl:
	# The _hashlib module wraps optimized implementations
	# of hash functions from the OpenSSL library.
	exts.append( Extension('_hashlib', ['_hashopenssl.c'],
	include_dirs = ssl_incs,
	library_dirs = ssl_libs,
	libraries = ['ssl', 'crypto']) )
	else:
	print ("warning: openssl 0x%08x is too old for _hashlib" %
	openssl_ver)
	missing.append('_hashlib')
	if COMPILED_WITH_PYDEBUG or not have_usable_openssl:
	# The _sha module implements the SHA1 hash algorithm.
	exts.append( Extension('_sha', ['shamodule.c']) )
	# The _md5 module implements the RSA Data Security, Inc. MD5
	# Message-Digest Algorithm, described in RFC 1321. The
	# necessary files md5.c and md5.h are included here.
	exts.append( Extension('_md5',
	sources = ['md5module.c', 'md5.c'],
	depends = ['md5.h']) )

	min_sha2_openssl_ver = 0x00908000
	if COMPILED_WITH_PYDEBUG or openssl_ver < min_sha2_openssl_ver:
	# OpenSSL doesn't do these until 0.9.8 so we'll bring our own hash
	exts.append( Extension('_sha256', ['sha256module.c']) )
	exts.append( Extension('_sha512', ['sha512module.c']) )

	# Modules that provide persistent dictionary-like semantics. You will
	# probably want to arrange for at least one of them to be available on
	# your machine, though none are defined by default because of library
	# dependencies. The Python module anydbm.py provides an
	# implementation independent wrapper for these; dumbdbm.py provides
	# similar functionality (but slower of course) implemented in Python.

	# Sleepycat^WOracle Berkeley DB interface.
	# http://www.oracle.com/database/berkeley-db/db/index.html
	#
	# This requires the Sleepycat^WOracle DB code. The supported versions
	# are set below. Visit the URL above to download
	# a release. Most open source OSes come with one or more
	# versions of BerkeleyDB already installed.

	max_db_ver = (5, 3)
	min_db_ver = (4, 3)
	db_setup_debug = False # verbose debug prints from this script?

	def allow_db_ver(db_ver):
	"""Returns a boolean if the given BerkeleyDB version is acceptable.

	Args:
	db_ver: A tuple of the version to verify.
	"""
	if not (min_db_ver <= db_ver <= max_db_ver):
	return False
	# Use this function to filter out known bad configurations.
	if (4, 6) == db_ver[:2]:
	# BerkeleyDB 4.6.x is not stable on many architectures.
	arch = platform_machine()
	if arch not in ('i386', 'i486', 'i586', 'i686',
	'x86_64', 'ia64'):
	return False
	return True

	def gen_db_minor_ver_nums(major):
	if major == 5:
	for x in range(max_db_ver[1]+1):
	if allow_db_ver((5, x)):
	yield x
	elif major == 4:
	for x in range(9):
	if allow_db_ver((4, x)):
	yield x
	elif major == 3:
	for x in (3,):
	if allow_db_ver((3, x)):
	yield x
	else:
	raise ValueError("unknown major BerkeleyDB version", major)

	# construct a list of paths to look for the header file in on
	# top of the normal inc_dirs.
	db_inc_paths = [
	'/usr/include/db4',
	'/usr/local/include/db4',
	'/opt/sfw/include/db4',
	'/usr/include/db3',
	'/usr/local/include/db3',
	'/opt/sfw/include/db3',
	# Fink defaults (http://fink.sourceforge.net/)
	'/sw/include/db4',
	'/sw/include/db3',
	]
	# 4.x minor number specific paths
	for x in gen_db_minor_ver_nums(4):
	db_inc_paths.append('/usr/include/db4%d' % x)
	db_inc_paths.append('/usr/include/db4.%d' % x)
	db_inc_paths.append('/usr/local/BerkeleyDB.4.%d/include' % x)
	db_inc_paths.append('/usr/local/include/db4%d' % x)
	db_inc_paths.append('/pkg/db-4.%d/include' % x)
	db_inc_paths.append('/opt/db-4.%d/include' % x)
	# MacPorts default (http://www.macports.org/)
	db_inc_paths.append('/opt/local/include/db4%d' % x)
	# 3.x minor number specific paths
	for x in gen_db_minor_ver_nums(3):
	db_inc_paths.append('/usr/include/db3%d' % x)
	db_inc_paths.append('/usr/local/BerkeleyDB.3.%d/include' % x)
	db_inc_paths.append('/usr/local/include/db3%d' % x)
	db_inc_paths.append('/pkg/db-3.%d/include' % x)
	db_inc_paths.append('/opt/db-3.%d/include' % x)

	if cross_compiling:
	db_inc_paths = []

	# Add some common subdirectories for Sleepycat DB to the list,
	# based on the standard include directories. This way DB3/4 gets
	# picked up when it is installed in a non-standard prefix and
	# the user has added that prefix into inc_dirs.
	std_variants = []
	for dn in inc_dirs:
	std_variants.append(os.path.join(dn, 'db3'))
	std_variants.append(os.path.join(dn, 'db4'))
	for x in gen_db_minor_ver_nums(4):
	std_variants.append(os.path.join(dn, "db4%d"%x))
	std_variants.append(os.path.join(dn, "db4.%d"%x))
	for x in gen_db_minor_ver_nums(3):
	std_variants.append(os.path.join(dn, "db3%d"%x))
	std_variants.append(os.path.join(dn, "db3.%d"%x))

	db_inc_paths = std_variants + db_inc_paths
	db_inc_paths = [p for p in db_inc_paths if os.path.exists(p)]

	db_ver_inc_map = {}

	if host_platform == 'darwin':
	sysroot = macosx_sdk_root()

	class db_found(Exception): pass
	try:
	# See whether there is a Sleepycat header in the standard
	# search path.
	for d in inc_dirs + db_inc_paths:
	f = os.path.join(d, "db.h")

	if host_platform == 'darwin' and is_macosx_sdk_path(d):
	f = os.path.join(sysroot, d[1:], "db.h")

	if db_setup_debug: print "db: looking for db.h in", f
	if os.path.exists(f):
	f = open(f).read()
	m = re.search(r"#define\WDB_VERSION_MAJOR\W(\d+)", f)
	if m:
	db_major = int(m.group(1))
	m = re.search(r"#define\WDB_VERSION_MINOR\W(\d+)", f)
	db_minor = int(m.group(1))
	db_ver = (db_major, db_minor)

	# Avoid 4.6 prior to 4.6.21 due to a BerkeleyDB bug
	if db_ver == (4, 6):
	m = re.search(r"#define\WDB_VERSION_PATCH\W(\d+)", f)
	db_patch = int(m.group(1))
	if db_patch < 21:
	print "db.h:", db_ver, "patch", db_patch,
	print "being ignored (4.6.x must be >= 4.6.21)"
	continue

	if ( (db_ver not in db_ver_inc_map) and
	allow_db_ver(db_ver) ):
	# save the include directory with the db.h version
	# (first occurrence only)
	db_ver_inc_map[db_ver] = d
	if db_setup_debug:
	print "db.h: found", db_ver, "in", d
	else:
	# we already found a header for this library version
	if db_setup_debug: print "db.h: ignoring", d
	else:
	# ignore this header, it didn't contain a version number
	if db_setup_debug:
	print "db.h: no version number version in", d

	db_found_vers = db_ver_inc_map.keys()
	db_found_vers.sort()

	while db_found_vers:
	db_ver = db_found_vers.pop()
	db_incdir = db_ver_inc_map[db_ver]

	# check lib directories parallel to the location of the header
	db_dirs_to_check = [
	db_incdir.replace("include", 'lib64'),
	db_incdir.replace("include", 'lib'),
	]

	if host_platform != 'darwin':
	db_dirs_to_check = filter(os.path.isdir, db_dirs_to_check)

	else:
	# Same as other branch, but takes OSX SDK into account
	tmp = []
	for dn in db_dirs_to_check:
	if is_macosx_sdk_path(dn):
	if os.path.isdir(os.path.join(sysroot, dn[1:])):
	tmp.append(dn)
	else:
	if os.path.isdir(dn):
	tmp.append(dn)
	db_dirs_to_check = tmp

	# Look for a version specific db-X.Y before an ambiguous dbX
	# XXX should we -ever- look for a dbX name? Do any
	# systems really not name their library by version and
	# symlink to more general names?
	for dblib in (('db-%d.%d' % db_ver),
	('db%d%d' % db_ver),
	('db%d' % db_ver[0])):
	dblib_file = self.compiler.find_library_file(
	db_dirs_to_check + lib_dirs, dblib )
	if dblib_file:
	dblib_dir = [ os.path.abspath(os.path.dirname(dblib_file)) ]
	raise db_found
	else:
	if db_setup_debug: print "db lib: ", dblib, "not found"

	except db_found:
	if db_setup_debug:
	print "bsddb using BerkeleyDB lib:", db_ver, dblib
	print "bsddb lib dir:", dblib_dir, " inc dir:", db_incdir
	db_incs = [db_incdir]
	dblibs = [dblib]
	# We add the runtime_library_dirs argument because the
	# BerkeleyDB lib we're linking against often isn't in the
	# system dynamic library search path. This is usually
	# correct and most trouble free, but may cause problems in
	# some unusual system configurations (e.g. the directory
	# is on an NFS server that goes away).
	exts.append(Extension('_bsddb', ['_bsddb.c'],
	depends = ['bsddb.h'],
	library_dirs=dblib_dir,
	runtime_library_dirs=dblib_dir,
	include_dirs=db_incs,
	libraries=dblibs))
	else:
	if db_setup_debug: print "db: no appropriate library found"
	db_incs = None
	dblibs = []
	dblib_dir = None
	missing.append('_bsddb')

	# The sqlite interface
	sqlite_setup_debug = False # verbose debug prints from this script?

	# We hunt for #define SQLITE_VERSION "n.n.n"
	# We need to find >= sqlite version 3.0.8
	sqlite_incdir = sqlite_libdir = None
	sqlite_inc_paths = [ '/usr/include',
	'/usr/include/sqlite',
	'/usr/include/sqlite3',
	'/usr/local/include',
	'/usr/local/include/sqlite',
	'/usr/local/include/sqlite3',
	]
	if cross_compiling:
	sqlite_inc_paths = []
	MIN_SQLITE_VERSION_NUMBER = (3, 0, 8)
	MIN_SQLITE_VERSION = ".".join([str(x)
	for x in MIN_SQLITE_VERSION_NUMBER])

	# Scan the default include directories before the SQLite specific
	# ones. This allows one to override the copy of sqlite on OSX,
	# where /usr/include contains an old version of sqlite.
	if host_platform == 'darwin':
	sysroot = macosx_sdk_root()

	for d_ in inc_dirs + sqlite_inc_paths:
	d = d_
	if host_platform == 'darwin' and is_macosx_sdk_path(d):
	d = os.path.join(sysroot, d[1:])

	f = os.path.join(d, "sqlite3.h")
	if os.path.exists(f):
	if sqlite_setup_debug: print "sqlite: found %s"%f
	incf = open(f).read()
	m = re.search(
	r'\s.#\s.define\s.SQLITE_VERSION\W"([\d\.]*)"', incf)
	if m:
	sqlite_version = m.group(1)
	sqlite_version_tuple = tuple([int(x)
	for x in sqlite_version.split(".")])
	if sqlite_version_tuple >= MIN_SQLITE_VERSION_NUMBER:
	# we win!
	if sqlite_setup_debug:
	print "%s/sqlite3.h: version %s"%(d, sqlite_version)
	sqlite_incdir = d
	break
	else:
	if sqlite_setup_debug:
	print "%s: version %d is too old, need >= %s"%(d,
	sqlite_version, MIN_SQLITE_VERSION)
	elif sqlite_setup_debug:
	print "sqlite: %s had no SQLITE_VERSION"%(f,)

	if sqlite_incdir:
	sqlite_dirs_to_check = [
	os.path.join(sqlite_incdir, '..', 'lib64'),
	os.path.join(sqlite_incdir, '..', 'lib'),
	os.path.join(sqlite_incdir, '..', '..', 'lib64'),
	os.path.join(sqlite_incdir, '..', '..', 'lib'),
	]
	sqlite_libfile = self.compiler.find_library_file(
	sqlite_dirs_to_check + lib_dirs, 'sqlite3')
	if sqlite_libfile:
	sqlite_libdir = [os.path.abspath(os.path.dirname(sqlite_libfile))]

	if sqlite_incdir and sqlite_libdir:
	sqlite_srcs = ['_sqlite/cache.c',
	'_sqlite/connection.c',
	'_sqlite/cursor.c',
	'_sqlite/microprotocols.c',
	'_sqlite/module.c',
	'_sqlite/prepare_protocol.c',
	'_sqlite/row.c',
	'_sqlite/statement.c',
	'_sqlite/util.c', ]

	sqlite_defines = []
	if host_platform != "win32":
	sqlite_defines.append(('MODULE_NAME', '"sqlite3"'))
	else:
	sqlite_defines.append(('MODULE_NAME', '\\"sqlite3\\"'))

	# Comment this out if you want the sqlite3 module to be able to load extensions.
	sqlite_defines.append(("SQLITE_OMIT_LOAD_EXTENSION", "1"))

	if host_platform == 'darwin':
	# In every directory on the search path search for a dynamic
	# library and then a static library, instead of first looking
	# for dynamic libraries on the entire path.
	# This way a statically linked custom sqlite gets picked up
	# before the dynamic library in /usr/lib.
	sqlite_extra_link_args = ('-Wl,-search_paths_first',)
	else:
	sqlite_extra_link_args = ()

	exts.append(Extension('_sqlite3', sqlite_srcs,
	define_macros=sqlite_defines,
	include_dirs=["Modules/_sqlite",
	sqlite_incdir],
	library_dirs=sqlite_libdir,
	extra_link_args=sqlite_extra_link_args,
	libraries=["sqlite3",]))
	else:
	missing.append('_sqlite3')

	# Look for Berkeley db 1.85. Note that it is built as a different
	# module name so it can be included even when later versions are
	# available. A very restrictive search is performed to avoid
	# accidentally building this module with a later version of the
	# underlying db library. May BSD-ish Unixes incorporate db 1.85
	# symbols into libc and place the include file in /usr/include.
	#
	# If the better bsddb library can be built (db_incs is defined)
	# we do not build this one. Otherwise this build will pick up
	# the more recent berkeleydb's db.h file first in the include path
	# when attempting to compile and it will fail.
	f = "/usr/include/db.h"

	if host_platform == 'darwin':
	if is_macosx_sdk_path(f):
	sysroot = macosx_sdk_root()
	f = os.path.join(sysroot, f[1:])

	if os.path.exists(f) and not db_incs:
	data = open(f).read()
	m = re.search(r"#sdefine\s+HASHVERSION\s+2\s", data)
	if m is not None:
	# bingo - old version used hash file format version 2
	### XXX this should be fixed to not be platform-dependent
	### but I don't have direct access to an osf1 platform and
	### seemed to be muffing the search somehow
	libraries = host_platform == "osf1" and ['db'] or None
	if libraries is not None:
	exts.append(Extension('bsddb185', ['bsddbmodule.c'],
	libraries=libraries))
	else:
	exts.append(Extension('bsddb185', ['bsddbmodule.c']))
	else:
	missing.append('bsddb185')
	else:
	missing.append('bsddb185')

	dbm_order = ['gdbm']
	# The standard Unix dbm module:
	if host_platform not in ['cygwin']:
	config_args = [arg.strip("'")
	for arg in sysconfig.get_config_var("CONFIG_ARGS").split()]
	dbm_args = [arg for arg in config_args
	if arg.startswith('--with-dbmliborder=')]
	if dbm_args:
	dbm_order = [arg.split('=')[-1] for arg in dbm_args][-1].split(":")
	else:
	dbm_order = "ndbm:gdbm:bdb".split(":")
	dbmext = None
	for cand in dbm_order:
	if cand == "ndbm":
	if find_file("ndbm.h", inc_dirs, []) is not None:
	# Some systems have -lndbm, others have -lgdbm_compat,
	# others don't have either
	if self.compiler.find_library_file(lib_dirs,
	'ndbm'):
	ndbm_libs = ['ndbm']
	elif self.compiler.find_library_file(lib_dirs,
	'gdbm_compat'):
	ndbm_libs = ['gdbm_compat']
	else:
	ndbm_libs = []
	print "building dbm using ndbm"
	dbmext = Extension('dbm', ['dbmmodule.c'],
	define_macros=[
	('HAVE_NDBM_H',None),
	],
	libraries=ndbm_libs)
	break

	elif cand == "gdbm":
	if self.compiler.find_library_file(lib_dirs, 'gdbm'):
	gdbm_libs = ['gdbm']
	if self.compiler.find_library_file(lib_dirs,
	'gdbm_compat'):
	gdbm_libs.append('gdbm_compat')
	if find_file("gdbm/ndbm.h", inc_dirs, []) is not None:
	print "building dbm using gdbm"
	dbmext = Extension(
	'dbm', ['dbmmodule.c'],
	define_macros=[
	('HAVE_GDBM_NDBM_H', None),
	],
	libraries = gdbm_libs)
	break
	if find_file("gdbm-ndbm.h", inc_dirs, []) is not None:
	print "building dbm using gdbm"
	dbmext = Extension(
	'dbm', ['dbmmodule.c'],
	define_macros=[
	('HAVE_GDBM_DASH_NDBM_H', None),
	],
	libraries = gdbm_libs)
	break
	elif cand == "bdb":
	if db_incs is not None:
	print "building dbm using bdb"
	dbmext = Extension('dbm', ['dbmmodule.c'],
	library_dirs=dblib_dir,
	runtime_library_dirs=dblib_dir,
	include_dirs=db_incs,
	define_macros=[
	('HAVE_BERKDB_H', None),
	('DB_DBM_HSEARCH', None),
	],
	libraries=dblibs)
	break
	if dbmext is not None:
	exts.append(dbmext)
	else:
	missing.append('dbm')

	# Anthony Baxter's gdbm module. GNU dbm(3) will require -lgdbm:
	if ('gdbm' in dbm_order and
	self.compiler.find_library_file(lib_dirs, 'gdbm')):
	exts.append( Extension('gdbm', ['gdbmmodule.c'],
	libraries = ['gdbm'] ) )
	else:
	missing.append('gdbm')

	# Unix-only modules
	if host_platform not in ['win32']:
	# Steen Lumholt's termios module
	exts.append( Extension('termios', ['termios.c']) )
	# Jeremy Hylton's rlimit interface
	if host_platform not in ['atheos']:
	exts.append( Extension('resource', ['resource.c']) )
	else:
	missing.append('resource')

	nis = self._detect_nis(inc_dirs, lib_dirs)
	if nis is not None:
	exts.append(nis)
	else:
	missing.append('nis')

	# Curses support, requiring the System V version of curses, often
	# provided by the ncurses library.
	panel_library = 'panel'
	curses_incs = None
	if curses_library.startswith('ncurses'):
	if curses_library == 'ncursesw':
	# Bug 1464056: If _curses.so links with ncursesw,
	# _curses_panel.so must link with panelw.
	panel_library = 'panelw'
	curses_libs = [curses_library]
	curses_incs = find_file('curses.h', inc_dirs,
	[os.path.join(d, 'ncursesw') for d in inc_dirs])
	exts.append( Extension('_curses', ['_cursesmodule.c'],
	include_dirs = curses_incs,
	libraries = curses_libs) )
	elif curses_library == 'curses' and host_platform != 'darwin':
	# OSX has an old Berkeley curses, not good enough for
	# the _curses module.
	if (self.compiler.find_library_file(lib_dirs, 'terminfo')):
	curses_libs = ['curses', 'terminfo']
	elif (self.compiler.find_library_file(lib_dirs, 'termcap')):
	curses_libs = ['curses', 'termcap']
	else:
	curses_libs = ['curses']

	exts.append( Extension('_curses', ['_cursesmodule.c'],
	libraries = curses_libs) )
	else:
	missing.append('_curses')

	# If the curses module is enabled, check for the panel module
	if (module_enabled(exts, '_curses') and
	self.compiler.find_library_file(lib_dirs, panel_library)):
	exts.append( Extension('_curses_panel', ['_curses_panel.c'],
	include_dirs = curses_incs,
	libraries = [panel_library] + curses_libs) )
	else:
	missing.append('_curses_panel')

	# Andrew Kuchling's zlib module. Note that some versions of zlib
	# 1.1.3 have security problems. See CERT Advisory CA-2002-07:
	# http://www.cert.org/advisories/CA-2002-07.html
	#
	# zlib 1.1.4 is fixed, but at least one vendor (RedHat) has decided to
	# patch its zlib 1.1.3 package instead of upgrading to 1.1.4. For
	# now, we still accept 1.1.3, because we think it's difficult to
	# exploit this in Python, and we'd rather make it RedHat's problem
	# than our problem <wink>.
	#
	# You can upgrade zlib to version 1.1.4 yourself by going to
	# http://www.gzip.org/zlib/
	zlib_inc = find_file('zlib.h', [], inc_dirs)
	have_zlib = False
	if zlib_inc is not None:
	zlib_h = zlib_inc[0] + '/zlib.h'
	version = '"0.0.0"'
	version_req = '"1.1.3"'
	if host_platform == 'darwin' and is_macosx_sdk_path(zlib_h):
	zlib_h = os.path.join(macosx_sdk_root(), zlib_h[1:])
	fp = open(zlib_h)
	while 1:
	line = fp.readline()
	if not line:
	break
	if line.startswith('#define ZLIB_VERSION'):
	version = line.split()[2]
	break
	if version >= version_req:
	if (self.compiler.find_library_file(lib_dirs, 'z')):
	if host_platform == "darwin":
	zlib_extra_link_args = ('-Wl,-search_paths_first',)
	else:
	zlib_extra_link_args = ()
	exts.append( Extension('zlib', ['zlibmodule.c'],
	libraries = ['z'],
	extra_link_args = zlib_extra_link_args))
	have_zlib = True
	else:
	missing.append('zlib')
	else:
	missing.append('zlib')
	else:
	missing.append('zlib')

	# Helper module for various ascii-encoders. Uses zlib for an optimized
	# crc32 if we have it. Otherwise binascii uses its own.
	if have_zlib:
	extra_compile_args = ['-DUSE_ZLIB_CRC32']
	libraries = ['z']
	extra_link_args = zlib_extra_link_args
	else:
	extra_compile_args = []
	libraries = []
	extra_link_args = []
	exts.append( Extension('binascii', ['binascii.c'],
	extra_compile_args = extra_compile_args,
	libraries = libraries,
	extra_link_args = extra_link_args) )

	# Gustavo Niemeyer's bz2 module.
	if (self.compiler.find_library_file(lib_dirs, 'bz2')):
	if host_platform == "darwin":
	bz2_extra_link_args = ('-Wl,-search_paths_first',)
	else:
	bz2_extra_link_args = ()
	exts.append( Extension('bz2', ['bz2module.c'],
	libraries = ['bz2'],
	extra_link_args = bz2_extra_link_args) )
	else:
	missing.append('bz2')

	# Interface to the Expat XML parser
	#
	# Expat was written by James Clark and is now maintained by a group of
	# developers on SourceForge; see www.libexpat.org for more information.
	# The pyexpat module was written by Paul Prescod after a prototype by
	# Jack Jansen. The Expat source is included in Modules/expat/. Usage
	# of a system shared libexpat.so is possible with --with-system-expat
	# configure option.
	#
	# More information on Expat can be found at www.libexpat.org.
	#
	if '--with-system-expat' in sysconfig.get_config_var("CONFIG_ARGS"):
	expat_inc = []
	define_macros = []
	expat_lib = ['expat']
	expat_sources = []
	expat_depends = []
	else:
	expat_inc = [os.path.join(os.getcwd(), srcdir, 'Modules', 'expat')]
	define_macros = [
	('HAVE_EXPAT_CONFIG_H', '1'),
	# bpo-30947: Python uses best available entropy sources to
	# call XML_SetHashSalt(), expat entropy sources are not needed
	('XML_POOR_ENTROPY', '1'),
	]
	expat_lib = []
	expat_sources = ['expat/xmlparse.c',
	'expat/xmlrole.c',
	'expat/xmltok.c']
	expat_depends = ['expat/ascii.h',
	'expat/asciitab.h',
	'expat/expat.h',
	'expat/expat_config.h',
	'expat/expat_external.h',
	'expat/internal.h',
	'expat/latin1tab.h',
	'expat/utf8tab.h',
	'expat/xmlrole.h',
	'expat/xmltok.h',
	'expat/xmltok_impl.h'
	]

	exts.append(Extension('pyexpat',
	define_macros = define_macros,
	include_dirs = expat_inc,
	libraries = expat_lib,
	sources = ['pyexpat.c'] + expat_sources,
	depends = expat_depends,
	))

	# Fredrik Lundh's cElementTree module. Note that this also
	# uses expat (via the CAPI hook in pyexpat).

	if os.path.isfile(os.path.join(srcdir, 'Modules', '_elementtree.c')):
	define_macros.append(('USE_PYEXPAT_CAPI', None))
	exts.append(Extension('_elementtree',
	define_macros = define_macros,
	include_dirs = expat_inc,
	libraries = expat_lib,
	sources = ['_elementtree.c'],
	depends = ['pyexpat.c'] + expat_sources +
	expat_depends,
	))
	else:
	missing.append('_elementtree')

	# Hye-Shik Chang's CJKCodecs modules.
	if have_unicode:
	exts.append(Extension('_multibytecodec',
	['cjkcodecs/multibytecodec.c']))
	for loc in ('kr', 'jp', 'cn', 'tw', 'hk', 'iso2022'):
	exts.append(Extension('_codecs_%s' % loc,
	['cjkcodecs/_codecs_%s.c' % loc]))
	else:
	missing.append('_multibytecodec')
	for loc in ('kr', 'jp', 'cn', 'tw', 'hk', 'iso2022'):
	missing.append('_codecs_%s' % loc)

	# Dynamic loading module
	if sys.maxint == 0x7fffffff:
	# This requires sizeof(int) == sizeof(long) == sizeof(char*)
	dl_inc = find_file('dlfcn.h', [], inc_dirs)
	if (dl_inc is not None) and (host_platform not in ['atheos']):
	exts.append( Extension('dl', ['dlmodule.c']) )
	else:
	missing.append('dl')
	else:
	missing.append('dl')

	# Thomas Heller's _ctypes module
	self.detect_ctypes(inc_dirs, lib_dirs)

	# Richard Oudkerk's multiprocessing module
	if host_platform == 'win32': # Windows
	macros = dict()
	libraries = ['ws2_32']

	elif host_platform == 'darwin': # Mac OSX
	macros = dict()
	libraries = []

	elif host_platform == 'cygwin': # Cygwin
	macros = dict()
	libraries = []

	elif host_platform in ('freebsd4', 'freebsd5', 'freebsd6', 'freebsd7', 'freebsd8'):
	# FreeBSD's P1003.1b semaphore support is very experimental
	# and has many known problems. (as of June 2008)
	macros = dict()
	libraries = []

	elif host_platform.startswith('openbsd'):
	macros = dict()
	libraries = []

	elif host_platform.startswith('netbsd'):
	macros = dict()
	libraries = []

	else: # Linux and other unices
	macros = dict()
	libraries = ['rt']

	if host_platform == 'win32':
	multiprocessing_srcs = [ '_multiprocessing/multiprocessing.c',
	'_multiprocessing/semaphore.c',
	'_multiprocessing/pipe_connection.c',
	'_multiprocessing/socket_connection.c',
	'_multiprocessing/win32_functions.c'
	]

	else:
	multiprocessing_srcs = [ '_multiprocessing/multiprocessing.c',
	'_multiprocessing/socket_connection.c'
	]
	if (sysconfig.get_config_var('HAVE_SEM_OPEN') and not
	sysconfig.get_config_var('POSIX_SEMAPHORES_NOT_ENABLED')):
	multiprocessing_srcs.append('_multiprocessing/semaphore.c')

	if sysconfig.get_config_var('WITH_THREAD'):
	exts.append ( Extension('_multiprocessing', multiprocessing_srcs,
	define_macros=macros.items(),
	include_dirs=["Modules/_multiprocessing"]))
	else:
	missing.append('_multiprocessing')

	# End multiprocessing


	# Platform-specific libraries
	if host_platform == 'linux2':
	# Linux-specific modules
	exts.append( Extension('linuxaudiodev', ['linuxaudiodev.c']) )
	else:
	missing.append('linuxaudiodev')

	if (host_platform in ('linux2', 'freebsd4', 'freebsd5', 'freebsd6',
	'freebsd7', 'freebsd8')
	or host_platform.startswith("gnukfreebsd")):
	exts.append( Extension('ossaudiodev', ['ossaudiodev.c']) )
	else:
	missing.append('ossaudiodev')

	if host_platform == 'sunos5':
	# SunOS specific modules
	exts.append( Extension('sunaudiodev', ['sunaudiodev.c']) )
	else:
	missing.append('sunaudiodev')

	if host_platform == 'darwin':
	# _scproxy
	exts.append(Extension("_scproxy", [os.path.join(srcdir, "Mac/Modules/_scproxy.c")],
	extra_link_args= [
	'-framework', 'SystemConfiguration',
	'-framework', 'CoreFoundation'
	]))


	if host_platform == 'darwin' and ("--disable-toolbox-glue" not in
	sysconfig.get_config_var("CONFIG_ARGS")):

	if int(os.uname()[2].split('.')[0]) >= 8:
	# We're on Mac OS X 10.4 or later, the compiler should
	# support '-Wno-deprecated-declarations'. This will
	# suppress deprecation warnings for the Carbon extensions,
	# these extensions wrap the Carbon APIs and even those
	# parts that are deprecated.
	carbon_extra_compile_args = ['-Wno-deprecated-declarations']
	else:
	carbon_extra_compile_args = []

	# Mac OS X specific modules.
	def macSrcExists(name1, name2=''):
	if not name1:
	return None
	names = (name1,)
	if name2:
	names = (name1, name2)
	path = os.path.join(srcdir, 'Mac', 'Modules', *names)
	return os.path.exists(path)

	def addMacExtension(name, kwds, extra_srcs=[]):
	dirname = ''
	if name[0] == '_':
	dirname = name[1:].lower()
	cname = name + '.c'
	cmodulename = name + 'module.c'
	# Check for NNN.c, NNNmodule.c, _nnn/NNN.c, _nnn/NNNmodule.c
	if macSrcExists(cname):
	srcs = [cname]
	elif macSrcExists(cmodulename):
	srcs = [cmodulename]
	elif macSrcExists(dirname, cname):
	# XXX(nnorwitz): If all the names ended with module, we
	# wouldn't need this condition. ibcarbon is the only one.
	srcs = [os.path.join(dirname, cname)]
	elif macSrcExists(dirname, cmodulename):
	srcs = [os.path.join(dirname, cmodulename)]
	else:
	raise RuntimeError("%s not found" % name)

	# Here's the whole point: add the extension with sources
	exts.append(Extension(name, srcs + extra_srcs, **kwds))

	# Core Foundation
	core_kwds = {'extra_compile_args': carbon_extra_compile_args,
	'extra_link_args': ['-framework', 'CoreFoundation'],
	}
	addMacExtension('_CF', core_kwds, ['cf/pycfbridge.c'])
	addMacExtension('autoGIL', core_kwds)



	# Carbon
	carbon_kwds = {'extra_compile_args': carbon_extra_compile_args,
	'extra_link_args': ['-framework', 'Carbon'],
	}
	CARBON_EXTS = ['ColorPicker', 'gestalt', 'MacOS', 'Nav',
	'OSATerminology', 'icglue',
	# All these are in subdirs
	'_AE', '_AH', '_App', '_CarbonEvt', '_Cm', '_Ctl',
	'_Dlg', '_Drag', '_Evt', '_File', '_Folder', '_Fm',
	'_Help', '_Icn', '_IBCarbon', '_List',
	'_Menu', '_Mlte', '_OSA', '_Res', '_Qd', '_Qdoffs',
	'_Scrap', '_Snd', '_TE',
	]
	for name in CARBON_EXTS:
	addMacExtension(name, carbon_kwds)

	# Workaround for a bug in the version of gcc shipped with Xcode 3.
	# The _Win extension should build just like the other Carbon extensions, but
	# this actually results in a hard crash of the linker.
	#
	if '-arch ppc64' in cflags and '-arch ppc' in cflags:
	win_kwds = {'extra_compile_args': carbon_extra_compile_args + ['-arch', 'i386', '-arch', 'ppc'],
	'extra_link_args': ['-framework', 'Carbon', '-arch', 'i386', '-arch', 'ppc'],
	}
	addMacExtension('_Win', win_kwds)
	else:
	addMacExtension('_Win', carbon_kwds)


	# Application Services & QuickTime
	app_kwds = {'extra_compile_args': carbon_extra_compile_args,
	'extra_link_args': ['-framework','ApplicationServices'],
	}
	addMacExtension('_Launch', app_kwds)
	addMacExtension('_CG', app_kwds)

	exts.append( Extension('_Qt', ['qt/_Qtmodule.c'],
	extra_compile_args=carbon_extra_compile_args,
	extra_link_args=['-framework', 'QuickTime',
	'-framework', 'Carbon']) )


	self.extensions.extend(exts)

	# Call the method for detecting whether _tkinter can be compiled
	self.detect_tkinter(inc_dirs, lib_dirs)

	if '_tkinter' not in [e.name for e in self.extensions]:
	missing.append('_tkinter')

	## # Uncomment these lines if you want to play with xxmodule.c
	## ext = Extension('xx', ['xxmodule.c'])
	## self.extensions.append(ext)

	return missing

	def detect_tkinter_explicitly(self):
	# Build _tkinter using explicit locations for Tcl/Tk.
	#
	# This is enabled when both arguments are given to ./configure:
	#
	# --with-tcltk-includes="-I/path/to/tclincludes \
	# -I/path/to/tkincludes"
	# --with-tcltk-libs="-L/path/to/tcllibs -ltclm.n \
	# -L/path/to/tklibs -ltkm.n"
	#
	# These values can also be specified or overridden via make:
	# make TCLTK_INCLUDES="..." TCLTK_LIBS="..."
	#
	# This can be useful for building and testing tkinter with multiple
	# versions of Tcl/Tk. Note that a build of Tk depends on a particular
	# build of Tcl so you need to specify both arguments and use care when
	# overriding.

	# The _TCLTK variables are created in the Makefile sharedmods target.
	tcltk_includes = os.environ.get('_TCLTK_INCLUDES')
	tcltk_libs = os.environ.get('_TCLTK_LIBS')
	if not (tcltk_includes and tcltk_libs):
	# Resume default configuration search.
	return 0

	extra_compile_args = tcltk_includes.split()
	extra_link_args = tcltk_libs.split()
	ext = Extension('_tkinter', ['_tkinter.c', 'tkappinit.c'],
	define_macros=[('WITH_APPINIT', 1)],
	extra_compile_args = extra_compile_args,
	extra_link_args = extra_link_args,
	)
	self.extensions.append(ext)
	return 1

	def detect_tkinter_darwin(self, inc_dirs, lib_dirs):
	# The _tkinter module, using frameworks. Since frameworks are quite
	# different the UNIX search logic is not sharable.
	from os.path import join, exists
	framework_dirs = [
	'/Library/Frameworks',
	'/System/Library/Frameworks/',
	join(os.getenv('HOME'), '/Library/Frameworks')
	]

	sysroot = macosx_sdk_root()

	# Find the directory that contains the Tcl.framework and Tk.framework
	# bundles.
	# XXX distutils should support -F!
	for F in framework_dirs:
	# both Tcl.framework and Tk.framework should be present


	for fw in 'Tcl', 'Tk':
	if is_macosx_sdk_path(F):
	if not exists(join(sysroot, F[1:], fw + '.framework')):
	break
	else:
	if not exists(join(F, fw + '.framework')):
	break
	else:
	# ok, F is now directory with both frameworks. Continure
	# building
	break
	else:
	# Tk and Tcl frameworks not found. Normal "unix" tkinter search
	# will now resume.
	return 0

	# For 8.4a2, we must add -I options that point inside the Tcl and Tk
	# frameworks. In later release we should hopefully be able to pass
	# the -F option to gcc, which specifies a framework lookup path.
	#
	include_dirs = [
	join(F, fw + '.framework', H)
	for fw in 'Tcl', 'Tk'
	for H in 'Headers', 'Versions/Current/PrivateHeaders'
	]

	# For 8.4a2, the X11 headers are not included. Rather than include a
	# complicated search, this is a hard-coded path. It could bail out
	# if X11 libs are not found...
	include_dirs.append('/usr/X11R6/include')
	frameworks = ['-framework', 'Tcl', '-framework', 'Tk']

	# All existing framework builds of Tcl/Tk don't support 64-bit
	# architectures.
	cflags = sysconfig.get_config_vars('CFLAGS')[0]
	archs = re.findall('-arch\s+(\w+)', cflags)

	if is_macosx_sdk_path(F):
	fp = os.popen("file %s/Tk.framework/Tk \| grep 'for architecture'"%(os.path.join(sysroot, F[1:]),))
	else:
	fp = os.popen("file %s/Tk.framework/Tk \| grep 'for architecture'"%(F,))

	detected_archs = []
	for ln in fp:
	a = ln.split()[-1]
	if a in archs:
	detected_archs.append(ln.split()[-1])
	fp.close()

	for a in detected_archs:
	frameworks.append('-arch')
	frameworks.append(a)

	ext = Extension('_tkinter', ['_tkinter.c', 'tkappinit.c'],
	define_macros=[('WITH_APPINIT', 1)],
	include_dirs = include_dirs,
	libraries = [],
	extra_compile_args = frameworks[2:],
	extra_link_args = frameworks,
	)
	self.extensions.append(ext)
	return 1

	def detect_tkinter(self, inc_dirs, lib_dirs):
	# The _tkinter module.

	# Check whether --with-tcltk-includes and --with-tcltk-libs were
	# configured or passed into the make target. If so, use these values
	# to build tkinter and bypass the searches for Tcl and TK in standard
	# locations.
	if self.detect_tkinter_explicitly():
	return

	# Rather than complicate the code below, detecting and building
	# AquaTk is a separate method. Only one Tkinter will be built on
	# Darwin - either AquaTk, if it is found, or X11 based Tk.
	if (host_platform == 'darwin' and
	self.detect_tkinter_darwin(inc_dirs, lib_dirs)):
	return

	# Assume we haven't found any of the libraries or include files
	# The versions with dots are used on Unix, and the versions without
	# dots on Windows, for detection by cygwin.
	tcllib = tklib = tcl_includes = tk_includes = None
	for version in ['8.6', '86', '8.5', '85', '8.4', '84', '8.3', '83',
	'8.2', '82', '8.1', '81', '8.0', '80']:
	tklib = self.compiler.find_library_file(lib_dirs,
	'tk' + version)
	tcllib = self.compiler.find_library_file(lib_dirs,
	'tcl' + version)
	if tklib and tcllib:
	# Exit the loop when we've found the Tcl/Tk libraries
	break

	# Now check for the header files
	if tklib and tcllib:
	# Check for the include files on Debian and {Free,Open}BSD, where
	# they're put in /usr/include/{tcl,tk}X.Y
	dotversion = version
	if '.' not in dotversion and "bsd" in host_platform.lower():
	# OpenBSD and FreeBSD use Tcl/Tk library names like libtcl83.a,
	# but the include subdirs are named like .../include/tcl8.3.
	dotversion = dotversion[:-1] + '.' + dotversion[-1]
	tcl_include_sub = []
	tk_include_sub = []
	for dir in inc_dirs:
	tcl_include_sub += [dir + os.sep + "tcl" + dotversion]
	tk_include_sub += [dir + os.sep + "tk" + dotversion]
	tk_include_sub += tcl_include_sub
	tcl_includes = find_file('tcl.h', inc_dirs, tcl_include_sub)
	tk_includes = find_file('tk.h', inc_dirs, tk_include_sub)

	if (tcllib is None or tklib is None or
	tcl_includes is None or tk_includes is None):
	self.announce("INFO: Can't locate Tcl/Tk libs and/or headers", 2)
	return

	# OK... everything seems to be present for Tcl/Tk.

	include_dirs = [] ; libs = [] ; defs = [] ; added_lib_dirs = []
	for dir in tcl_includes + tk_includes:
	if dir not in include_dirs:
	include_dirs.append(dir)

	# Check for various platform-specific directories
	if host_platform == 'sunos5':
	include_dirs.append('/usr/openwin/include')
	added_lib_dirs.append('/usr/openwin/lib')
	elif os.path.exists('/usr/X11R6/include'):
	include_dirs.append('/usr/X11R6/include')
	added_lib_dirs.append('/usr/X11R6/lib64')
	added_lib_dirs.append('/usr/X11R6/lib')
	elif os.path.exists('/usr/X11R5/include'):
	include_dirs.append('/usr/X11R5/include')
	added_lib_dirs.append('/usr/X11R5/lib')
	else:
	# Assume default location for X11
	include_dirs.append('/usr/X11/include')
	added_lib_dirs.append('/usr/X11/lib')

	# If Cygwin, then verify that X is installed before proceeding
	if host_platform == 'cygwin':
	x11_inc = find_file('X11/Xlib.h', [], include_dirs)
	if x11_inc is None:
	return

	# Check for BLT extension
	if self.compiler.find_library_file(lib_dirs + added_lib_dirs,
	'BLT8.0'):
	defs.append( ('WITH_BLT', 1) )
	libs.append('BLT8.0')
	elif self.compiler.find_library_file(lib_dirs + added_lib_dirs,
	'BLT'):
	defs.append( ('WITH_BLT', 1) )
	libs.append('BLT')

	# Add the Tcl/Tk libraries
	libs.append('tk'+ version)
	libs.append('tcl'+ version)

	if host_platform in ['aix3', 'aix4']:
	libs.append('ld')

	# Finally, link with the X11 libraries (not appropriate on cygwin)
	if host_platform != "cygwin":
	libs.append('X11')

	ext = Extension('_tkinter', ['_tkinter.c', 'tkappinit.c'],
	define_macros=[('WITH_APPINIT', 1)] + defs,
	include_dirs = include_dirs,
	libraries = libs,
	library_dirs = added_lib_dirs,
	)
	self.extensions.append(ext)

	# XXX handle these, but how to detect?
	# *** Uncomment and edit for PIL (TkImaging) extension only:
	# -DWITH_PIL -I../Extensions/Imaging/libImaging tkImaging.c \
	# *** Uncomment and edit for TOGL extension only:
	# -DWITH_TOGL togl.c \
	# *** Uncomment these for TOGL extension only:
	# -lGL -lGLU -lXext -lXmu \

	def configure_ctypes_darwin(self, ext):
	# Darwin (OS X) uses preconfigured files, in
	# the Modules/_ctypes/libffi_osx directory.
	srcdir = sysconfig.get_config_var('srcdir')
	ffi_srcdir = os.path.abspath(os.path.join(srcdir, 'Modules',
	'_ctypes', 'libffi_osx'))
	sources = [os.path.join(ffi_srcdir, p)
	for p in ['ffi.c',
	'x86/darwin64.S',
	'x86/x86-darwin.S',
	'x86/x86-ffi_darwin.c',
	'x86/x86-ffi64.c',
	'powerpc/ppc-darwin.S',
	'powerpc/ppc-darwin_closure.S',
	'powerpc/ppc-ffi_darwin.c',
	'powerpc/ppc64-darwin_closure.S',
	]]

	# Add .S (preprocessed assembly) to C compiler source extensions.
	self.compiler.src_extensions.append('.S')

	include_dirs = [os.path.join(ffi_srcdir, 'include'),
	os.path.join(ffi_srcdir, 'powerpc')]
	ext.include_dirs.extend(include_dirs)
	ext.sources.extend(sources)
	return True

	def configure_ctypes(self, ext):
	if not self.use_system_libffi:
	if host_platform == 'darwin':
	return self.configure_ctypes_darwin(ext)

	srcdir = sysconfig.get_config_var('srcdir')
	ffi_builddir = os.path.join(self.build_temp, 'libffi')
	ffi_srcdir = os.path.abspath(os.path.join(srcdir, 'Modules',
	'_ctypes', 'libffi'))
	ffi_configfile = os.path.join(ffi_builddir, 'fficonfig.py')

	from distutils.dep_util import newer_group

	config_sources = [os.path.join(ffi_srcdir, fname)
	for fname in os.listdir(ffi_srcdir)
	if os.path.isfile(os.path.join(ffi_srcdir, fname))]
	if self.force or newer_group(config_sources,
	ffi_configfile):
	from distutils.dir_util import mkpath
	mkpath(ffi_builddir)
	config_args = [arg for arg in sysconfig.get_config_var("CONFIG_ARGS").split()
	if (('--host=' in arg) or ('--build=' in arg))]
	if not self.verbose:
	config_args.append("-q")

	# Pass empty CFLAGS because we'll just append the resulting
	# CFLAGS to Python's; -g or -O2 is to be avoided.
	cmd = "cd %s && env CFLAGS='' '%s/configure' %s" \
	% (ffi_builddir, ffi_srcdir, " ".join(config_args))

	res = os.system(cmd)
	if res or not os.path.exists(ffi_configfile):
	print "Failed to configure _ctypes module"
	return False

	fficonfig = {}
	with open(ffi_configfile) as f:
	exec f in fficonfig

	# Add .S (preprocessed assembly) to C compiler source extensions.
	self.compiler.src_extensions.append('.S')

	include_dirs = [os.path.join(ffi_builddir, 'include'),
	ffi_builddir,
	os.path.join(ffi_srcdir, 'src')]
	extra_compile_args = fficonfig['ffi_cflags'].split()

	ext.sources.extend(os.path.join(ffi_srcdir, f) for f in
	fficonfig['ffi_sources'])
	ext.include_dirs.extend(include_dirs)
	ext.extra_compile_args.extend(extra_compile_args)
	return True

	def detect_ctypes(self, inc_dirs, lib_dirs):
	self.use_system_libffi = False
	include_dirs = []
	extra_compile_args = []
	extra_link_args = []
	sources = ['_ctypes/_ctypes.c',
	'_ctypes/callbacks.c',
	'_ctypes/callproc.c',
	'_ctypes/stgdict.c',
	'_ctypes/cfield.c']
	depends = ['_ctypes/ctypes.h']

	if host_platform == 'darwin':
	sources.append('_ctypes/malloc_closure.c')
	sources.append('_ctypes/darwin/dlfcn_simple.c')
	extra_compile_args.append('-DMACOSX')
	include_dirs.append('_ctypes/darwin')
	# XXX Is this still needed?
	## extra_link_args.extend(['-read_only_relocs', 'warning'])

	elif host_platform == 'sunos5':
	# XXX This shouldn't be necessary; it appears that some
	# of the assembler code is non-PIC (i.e. it has relocations
	# when it shouldn't. The proper fix would be to rewrite
	# the assembler code to be PIC.
	# This only works with GCC; the Sun compiler likely refuses
	# this option. If you want to compile ctypes with the Sun
	# compiler, please research a proper solution, instead of
	# finding some -z option for the Sun compiler.
	extra_link_args.append('-mimpure-text')

	elif host_platform.startswith('hp-ux'):
	extra_link_args.append('-fPIC')

	ext = Extension('_ctypes',
	include_dirs=include_dirs,
	extra_compile_args=extra_compile_args,
	extra_link_args=extra_link_args,
	libraries=[],
	sources=sources,
	depends=depends)
	ext_test = Extension('_ctypes_test',
	sources=['_ctypes/_ctypes_test.c'])
	self.extensions.extend([ext, ext_test])

	if not '--with-system-ffi' in sysconfig.get_config_var("CONFIG_ARGS"):
	return

	if host_platform == 'darwin':
	# OS X 10.5 comes with libffi.dylib; the include files are
	# in /usr/include/ffi
	inc_dirs.append('/usr/include/ffi')

	ffi_inc = [sysconfig.get_config_var("LIBFFI_INCLUDEDIR")]
	if not ffi_inc or ffi_inc[0] == '':
	ffi_inc = find_file('ffi.h', [], inc_dirs)
	if ffi_inc is not None:
	ffi_h = ffi_inc[0] + '/ffi.h'
	with open(ffi_h) as f:
	for line in f:
	line = line.strip()
	if line.startswith(('#define LIBFFI_H',
	'#define ffi_wrapper_h')):
	break
	else:
	ffi_inc = None
	print('Header file {} does not define LIBFFI_H or '
	'ffi_wrapper_h'.format(ffi_h))
	ffi_lib = None
	if ffi_inc is not None:
	for lib_name in ('ffi_convenience', 'ffi_pic', 'ffi'):
	if (self.compiler.find_library_file(lib_dirs, lib_name)):
	ffi_lib = lib_name
	break

	if ffi_inc and ffi_lib:
	ext.include_dirs.extend(ffi_inc)
	ext.libraries.append(ffi_lib)
	self.use_system_libffi = True

	if sysconfig.get_config_var('HAVE_LIBDL'):
	# for dlopen, see bpo-32647
	ext.libraries.append('dl')

	def _detect_nis(self, inc_dirs, lib_dirs):
	if host_platform in {'win32', 'cygwin', 'qnx6'}:
	return None

	libs = []
	library_dirs = []
	includes_dirs = []

	# bpo-32521: glibc has deprecated Sun RPC for some time. Fedora 28
	# moved headers and libraries to libtirpc and libnsl. The headers
	# are in tircp and nsl sub directories.
	rpcsvc_inc = find_file(
	'rpcsvc/yp_prot.h', inc_dirs,
	[os.path.join(inc_dir, 'nsl') for inc_dir in inc_dirs]
	)
	rpc_inc = find_file(
	'rpc/rpc.h', inc_dirs,
	[os.path.join(inc_dir, 'tirpc') for inc_dir in inc_dirs]
	)
	if rpcsvc_inc is None or rpc_inc is None:
	# not found
	return None
	includes_dirs.extend(rpcsvc_inc)
	includes_dirs.extend(rpc_inc)

	if self.compiler.find_library_file(lib_dirs, 'nsl'):
	libs.append('nsl')
	else:
	# libnsl-devel: check for libnsl in nsl/ subdirectory
	nsl_dirs = [os.path.join(lib_dir, 'nsl') for lib_dir in lib_dirs]
	libnsl = self.compiler.find_library_file(nsl_dirs, 'nsl')
	if libnsl is not None:
	library_dirs.append(os.path.dirname(libnsl))
	libs.append('nsl')

	if self.compiler.find_library_file(lib_dirs, 'tirpc'):
	libs.append('tirpc')

	return Extension(
	'nis', ['nismodule.c'],
	libraries=libs,
	library_dirs=library_dirs,
	include_dirs=includes_dirs
	)


	class PyBuildInstall(install):
	# Suppress the warning about installation into the lib_dynload
	# directory, which is not in sys.path when running Python during
	# installation:
	def initialize_options (self):
	install.initialize_options(self)
	self.warn_dir=0

	class PyBuildInstallLib(install_lib):
	# Do exactly what install_lib does but make sure correct access modes get
	# set on installed directories and files. All installed files with get
	# mode 644 unless they are a shared library in which case they will get
	# mode 755. All installed directories will get mode 755.

	so_ext = sysconfig.get_config_var("SO")

	def install(self):
	outfiles = install_lib.install(self)
	self.set_file_modes(outfiles, 0644, 0755)
	self.set_dir_modes(self.install_dir, 0755)
	return outfiles

	def set_file_modes(self, files, defaultMode, sharedLibMode):
	if not self.is_chmod_supported(): return
	if not files: return

	for filename in files:
	if os.path.islink(filename): continue
	mode = defaultMode
	if filename.endswith(self.so_ext): mode = sharedLibMode
	log.info("changing mode of %s to %o", filename, mode)
	if not self.dry_run: os.chmod(filename, mode)

	def set_dir_modes(self, dirname, mode):
	if not self.is_chmod_supported(): return
	os.path.walk(dirname, self.set_dir_modes_visitor, mode)

	def set_dir_modes_visitor(self, mode, dirname, names):
	if os.path.islink(dirname): return
	log.info("changing mode of %s to %o", dirname, mode)
	if not self.dry_run: os.chmod(dirname, mode)

	def is_chmod_supported(self):
	return hasattr(os, 'chmod')

	SUMMARY = """
	Python is an interpreted, interactive, object-oriented programming
	language. It is often compared to Tcl, Perl, Scheme or Java.

	Python combines remarkable power with very clear syntax. It has
	modules, classes, exceptions, very high level dynamic data types, and
	dynamic typing. There are interfaces to many system calls and
	libraries, as well as to various windowing systems (X11, Motif, Tk,
	Mac, MFC). New built-in modules are easily written in C or C++. Python
	is also usable as an extension language for applications that need a
	programmable interface.

	The Python implementation is portable: it runs on many brands of UNIX,
	on Windows, DOS, OS/2, Mac, Amiga... If your favorite system isn't
	listed here, it may still be supported, if there's a C compiler for
	it. Ask around on comp.lang.python -- or just try compiling Python
	yourself.
	"""

	CLASSIFIERS = """
	Development Status :: 6 - Mature
	License :: OSI Approved :: Python Software Foundation License
	Natural Language :: English
	Programming Language :: C
	Programming Language :: Python
	Topic :: Software Development
	"""

	def main():
	# turn off warnings when deprecated modules are imported
	import warnings
	warnings.filterwarnings("ignore",category=DeprecationWarning)
	setup(# PyPI Metadata (PEP 301)
	name = "Python",
	version = sys.version.split()[0],
	url = "http://www.python.org/%s" % sys.version[:3],
	maintainer = "Guido van Rossum and the Python community",
	maintainer_email = "python-dev@python.org",
	description = "A high-level object-oriented programming language",
	long_description = SUMMARY.strip(),
	license = "PSF license",
	classifiers = filter(None, CLASSIFIERS.split("\n")),
	platforms = ["Many"],

	# Build info
	cmdclass = {'build_ext':PyBuildExt, 'install':PyBuildInstall,
	'install_lib':PyBuildInstallLib},
	# The struct module is defined here, because build_ext won't be
	# called unless there's at least one extension module defined.
	ext_modules=[Extension('_struct', ['_struct.c'])],

	# Scripts to install
	scripts = ['Tools/scripts/pydoc', 'Tools/scripts/idle',
	'Tools/scripts/2to3',
	'Lib/smtpd.py']
	)

	# --install-platlib
	if __name__ == '__main__':
	main()

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