cpython/setup.py at 3.9 · python/cpython · GitHub

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# Autodetecting setup.py script for building the Python extensions

import argparse

import importlib._bootstrap

import importlib.machinery

import importlib.util

import os

import re

import sys

import sysconfig

from glob import glob, escape

import _osx_support

try:

import subprocess

del subprocess

SUBPROCESS_BOOTSTRAP = False

except ImportError:

# Bootstrap Python: distutils.spawn uses subprocess to build C extensions,

# subprocess requires C extensions built by setup.py like _posixsubprocess.

# Use _bootsubprocess which only uses the os module.

# It is dropped from sys.modules as soon as all C extension modules

# are built.

import _bootsubprocess

sys.modules['subprocess'] = _bootsubprocess

del _bootsubprocess

SUBPROCESS_BOOTSTRAP = True

from distutils import log

from distutils.command.build_ext import build_ext

from distutils.command.build_scripts import build_scripts

from distutils.command.install import install

from distutils.command.install_lib import install_lib

from distutils.core import Extension, setup

from distutils.errors import CCompilerError, DistutilsError

from distutils.spawn import find_executable

# Compile extensions used to test Python?

TEST_EXTENSIONS = True

# This global variable is used to hold the list of modules to be disabled.

DISABLED_MODULE_LIST = []

def get_platform():

# Cross compiling

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

CROSS_COMPILING = ("_PYTHON_HOST_PLATFORM" in os.environ)

HOST_PLATFORM = get_platform()

MS_WINDOWS = (HOST_PLATFORM == 'win32')

CYGWIN = (HOST_PLATFORM == 'cygwin')

MACOS = (HOST_PLATFORM == 'darwin')

AIX = (HOST_PLATFORM.startswith('aix'))

VXWORKS = ('vxworks' in HOST_PLATFORM)

CC = os.environ.get("CC")

if not CC:

CC = sysconfig.get_config_var("CC")

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, 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 run_command(cmd):

status = os.system(cmd)

return os.waitstatus_to_exitcode(status)

# Set common compiler and linker flags derived from the Makefile,

# reserved for building the interpreter and the stdlib modules.

# See bpo-21121 and bpo-35257

def set_compiler_flags(compiler_flags, compiler_py_flags_nodist):

flags = sysconfig.get_config_var(compiler_flags)

py_flags_nodist = sysconfig.get_config_var(compiler_py_flags_nodist)

sysconfig.get_config_vars()[compiler_flags] = flags + ' ' + py_flags_nodist

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

MACOS_SDK_ROOT = None

MACOS_SDK_SPECIFIED = 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.

Also sets MACOS_SDK_SPECIFIED for use by macosx_sdk_specified().

"""

global MACOS_SDK_ROOT, MACOS_SDK_SPECIFIED

# 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)

MACOS_SDK_SPECIFIED = MACOS_SDK_ROOT != '/'

else:

MACOS_SDK_ROOT = _osx_support._default_sysroot(

sysconfig.get_config_var('CC'))

MACOS_SDK_SPECIFIED = False

return MACOS_SDK_ROOT

def macosx_sdk_specified():

"""Returns true if an SDK was explicitly configured.

True if an SDK was selected at configure time, either by specifying

--enable-universalsdk=(something other than no or /) or by adding a

-isysroot option to CFLAGS. In some cases, like when making

decisions about macOS Tk framework paths, we need to be able to

know whether the user explicitly asked to build with an SDK versus

the implicit use of an SDK when header files are no longer

installed on a running system by the Command Line Tools.

"""

global MACOS_SDK_SPECIFIED

# If already called, return cached result.

if MACOS_SDK_SPECIFIED:

return MACOS_SDK_SPECIFIED

# Find the sdk root and set MACOS_SDK_SPECIFIED

macosx_sdk_root()

return MACOS_SDK_SPECIFIED

def is_macosx_sdk_path(path):

"""

Returns True if 'path' can be located in a macOS SDK

"""

return ( (path.startswith('/usr/') and not path.startswith('/usr/local'))

or path.startswith('/System/Library')

or path.startswith('/System/iOSSupport') )

def grep_headers_for(function, headers):

for header in headers:

with open(header, 'r', errors='surrogateescape') as f:

if function in f.read():

return True

return False

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 MACOS:

# 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 MACOS 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 MACOS 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 MACOS:

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 MACOS 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 MACOS 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 validate_tzpath():

base_tzpath = sysconfig.get_config_var('TZPATH')

if not base_tzpath:

return

tzpaths = base_tzpath.split(os.pathsep)

bad_paths = [tzpath for tzpath in tzpaths if not os.path.isabs(tzpath)]

if bad_paths:

raise ValueError('TZPATH must contain only absolute paths, '

+ f'found:\n{tzpaths!r}\nwith invalid paths:\n'

+ f'{bad_paths!r}')

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.srcdir = None

self.lib_dirs = None

self.inc_dirs = None

self.config_h_vars = None

self.failed = []

self.failed_on_import = []

self.missing = []

self.disabled_configure = []

if '-j' in os.environ.get('MAKEFLAGS', ''):

self.parallel = True

def add(self, ext):

self.extensions.append(ext)

def set_srcdir(self):

self.srcdir = sysconfig.get_config_var('srcdir')

if not self.srcdir:

# Maybe running on Windows but not using CYGWIN?

raise ValueError("No source directory; cannot proceed.")

self.srcdir = os.path.abspath(self.srcdir)

def remove_disabled(self):

# 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

def update_sources_depends(self):

# Fix up the autodetected modules, prefixing all the source files

# with Modules/.

moddirlist = [os.path.join(self.srcdir, 'Modules')]

# Fix up the paths for scripts, too

self.distribution.scripts = [os.path.join(self.srcdir, filename)

for filename in self.distribution.scripts]

# Python header files

headers = [sysconfig.get_config_h_filename()]

headers += glob(os.path.join(escape(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)

def remove_configured_extensions(self):

# The sysconfig variables built by makesetup that list the already

# built modules and the disabled modules as configured by the Setup

# files.

sysconf_built = sysconfig.get_config_var('MODBUILT_NAMES').split()

sysconf_dis = sysconfig.get_config_var('MODDISABLED_NAMES').split()

mods_built = []

mods_disabled = []

for ext in self.extensions:

# If a module has already been built or has been disabled in the

# Setup files, don't build it here.

if ext.name in sysconf_built:

mods_built.append(ext)

if ext.name in sysconf_dis:

mods_disabled.append(ext)

mods_configured = mods_built + mods_disabled

if mods_configured:

self.extensions = [x for x in self.extensions if x not in

mods_configured]

# Remove the shared libraries built by a previous build.

for ext in mods_configured:

fullpath = self.get_ext_fullpath(ext.name)

if os.path.exists(fullpath):

os.unlink(fullpath)

return (mods_built, mods_disabled)

def set_compiler_executables(self):

# 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)

def build_extensions(self):

self.set_srcdir()

self.set_compiler_executables()

self.configure_compiler()

self.init_inc_lib_dirs()

# Detect which modules should be compiled

self.detect_modules()

self.remove_disabled()

self.update_sources_depends()

mods_built, mods_disabled = self.remove_configured_extensions()

build_ext.build_extensions(self)

if SUBPROCESS_BOOTSTRAP:

# Drop our custom subprocess module:

# use the newly built subprocess module

del sys.modules['subprocess']

for ext in self.extensions:

self.check_extension_import(ext)

self.summary(mods_built, mods_disabled)

def summary(self, mods_built, mods_disabled):

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

if self.failed or self.failed_on_import:

all_failed = self.failed + self.failed_on_import

longest = max(longest, max([len(name) for name in all_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 self.missing:

print()

print("Python build finished successfully!")

print("The necessary bits to build these optional modules were not "

"found:")

print_three_column(self.missing)

print("To find the necessary bits, look in setup.py in"

" detect_modules() for the module's name.")

print()

if mods_built:

print()

print("The following modules found by detect_modules() in"

" setup.py, have been")

print("built by the Makefile instead, as configured by the"

" Setup files:")

print_three_column([ext.name for ext in mods_built])

print()

if mods_disabled:

print()

print("The following modules found by detect_modules() in"

" setup.py have not")

print("been built, they are *disabled* in the Setup files:")

print_three_column([ext.name for ext in mods_disabled])

print()

if self.disabled_configure:

print()

print("The following modules found by detect_modules() in"

" setup.py have not")

print("been built, they are *disabled* by configure:")

print_three_column(self.disabled_configure)

print()

if self.failed:

failed = self.failed[:]

print()

print("Failed to build these modules:")

print_three_column(failed)

print()

if self.failed_on_import:

failed = self.failed_on_import[:]

print()

print("Following modules built successfully"

" but were removed because they could not be imported:")

print_three_column(failed)

print()

if any('_ssl' in l

for l in (self.missing, self.failed, self.failed_on_import)):

print()

print("Could not build the ssl module!")

print("Python requires an OpenSSL 1.0.2 or 1.1 compatible "

"libssl with X509_VERIFY_PARAM_set1_host().")

print("LibreSSL 2.6.4 and earlier do not provide the necessary "

"APIs, https://github.com/libressl-portable/portable/issues/381")

print()

if os.environ.get("PYTHONSTRICTEXTENSIONBUILD") and (self.failed or self.failed_on_import):

raise RuntimeError("Failed to build some stdlib modules")

def build_extension(self, ext):

if ext.name == '_ctypes':

if not self.configure_ctypes(ext):

self.failed.append(ext.name)

return

try:

build_ext.build_extension(self, ext)

except (CCompilerError, DistutilsError) as why:

self.announce('WARNING: building of extension "%s" failed: %s' %

(ext.name, why))

self.failed.append(ext.name)

return

def check_extension_import(self, ext):

# Don't try to import an extension that has failed to compile

if ext.name in self.failed:

self.announce(

'WARNING: skipping import check for failed build "%s"' %

ext.name, level=1)

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 MACOS and (

sys.maxsize > 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 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)))

# If the build directory didn't exist when setup.py was

# started, sys.path_importer_cache has a negative result

# cached. Clear that cache before trying to import.

sys.path_importer_cache.clear()

# Don't try to load extensions for cross builds

if CROSS_COMPILING:

return

loader = importlib.machinery.ExtensionFileLoader(ext.name, ext_filename)

spec = importlib.util.spec_from_file_location(ext.name, ext_filename,

loader=loader)

try:

importlib._bootstrap._load(spec)

except ImportError as why:

self.failed_on_import.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)

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

tmpfile = os.path.join(self.build_temp, 'multiarch')

if not os.path.exists(self.build_temp):

os.makedirs(self.build_temp)

ret = run_command(

'%s -print-multiarch > %s 2> /dev/null' % (CC, tmpfile))

multiarch_path_component = ''

try:

if ret == 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 = run_command(

'dpkg-architecture %s -qDEB_HOST_MULTIARCH > %s 2> /dev/null' %

(opt, tmpfile))

try:

if ret == 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_cross_compiling_paths(self):

tmpfile = os.path.join(self.build_temp, 'ccpaths')

if not os.path.exists(self.build_temp):

os.makedirs(self.build_temp)

# bpo-38472: With a German locale, GCC returns "gcc-Version 9.1.0

# (GCC)", whereas it returns "gcc version 9.1.0" with the C locale.

ret = run_command('LC_ALL=C %s -E -v - </dev/null 2>%s 1>/dev/null' % (CC, tmpfile))

is_gcc = False

is_clang = False

in_incdirs = False

try:

if ret == 0:

with open(tmpfile) as fp:

for line in fp.readlines():

if line.startswith("gcc version"):

is_gcc = True

elif line.startswith("clang version"):

is_clang = True

elif line.startswith("#include <...>"):

in_incdirs = True

elif line.startswith("End of search list"):

in_incdirs = False

elif (is_gcc or is_clang) 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,

elif (is_gcc or is_clang) and in_incdirs and '/gcc/' not in line and '/clang/' not in line:

add_dir_to_list(self.compiler.include_dirs,

line.strip())

finally:

os.unlink(tmpfile)

def add_ldflags_cppflags(self):

# 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:

parser = argparse.ArgumentParser()

parser.add_argument(arg_name, dest="dirs", action="append")

options, _ = parser.parse_known_args(env_val.split())

if options.dirs:

for directory in reversed(options.dirs):

add_dir_to_list(dir_list, directory)

def configure_compiler(self):

# Ensure that /usr/local is always used, but the local build

# directories (i.e. '.' and 'Include') must be first. See issue

# 10520.

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')

# only change this for cross builds for 3.3, issues on Mageia

if CROSS_COMPILING:

self.add_cross_compiling_paths()

self.add_multiarch_paths()

self.add_ldflags_cppflags()

def init_inc_lib_dirs(self):

if (not CROSS_COMPILING and

os.path.normpath(sys.base_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"))

system_lib_dirs = ['/lib64', '/usr/lib64', '/lib', '/usr/lib']

system_include_dirs = ['/usr/include']

# 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.

if not CROSS_COMPILING:

self.lib_dirs = self.compiler.library_dirs + system_lib_dirs

self.inc_dirs = self.compiler.include_dirs + system_include_dirs

else:

# Add the sysroot paths. 'sysroot' is a compiler option used to

# set the logical path of the standard system headers and

# libraries.

self.lib_dirs = (self.compiler.library_dirs +

sysroot_paths(('LDFLAGS', 'CC'), system_lib_dirs))

self.inc_dirs = (self.compiler.include_dirs +

sysroot_paths(('CPPFLAGS', 'CFLAGS', 'CC'),

system_include_dirs))

config_h = sysconfig.get_config_h_filename()

with open(config_h) as file:

self.config_h_vars = sysconfig.parse_config_h(file)

# OSF/1 and Unixware have some stuff in /usr/ccs/lib (like -ldb)

if HOST_PLATFORM in ['osf1', 'unixware7', 'openunix8']:

self.lib_dirs += ['/usr/ccs/lib']

# HP-UX11iv3 keeps files in lib/hpux folders.

if HOST_PLATFORM == 'hp-ux11':

self.lib_dirs += ['/usr/lib/hpux64', '/usr/lib/hpux32']

if MACOS:

# 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'):

self.inc_dirs.append(item[2:])

for item in ldflags.split():

if item.startswith('-L'):

self.lib_dirs.append(item[2:])

def detect_simple_extensions(self):

# The following modules are all pretty straightforward, and compile

# on pretty much any POSIXish platform.

# array objects

self.add(Extension('array', ['arraymodule.c']))

# Context Variables

self.add(Extension('_contextvars', ['_contextvarsmodule.c']))

shared_math = 'Modules/_math.o'

# math library functions, e.g. sin()

self.add(Extension('math', ['mathmodule.c'],

extra_compile_args=['-DPy_BUILD_CORE_MODULE'],

extra_objects=[shared_math],

depends=['_math.h', shared_math],

libraries=['m']))

# complex math library functions

self.add(Extension('cmath', ['cmathmodule.c'],

extra_compile_args=['-DPy_BUILD_CORE_MODULE'],

extra_objects=[shared_math],

depends=['_math.h', shared_math],

libraries=['m']))

# time libraries: librt may be needed for clock_gettime()

time_libs = []

lib = sysconfig.get_config_var('TIMEMODULE_LIB')

if lib:

time_libs.append(lib)

# time operations and variables

self.add(Extension('time', ['timemodule.c'],

libraries=time_libs))

# libm is needed by delta_new() that uses round() and by accum() that

# uses modf().

self.add(Extension('_datetime', ['_datetimemodule.c'],

libraries=['m']))

# zoneinfo module

self.add(Extension('_zoneinfo', ['_zoneinfo.c'])),

# random number generator implemented in C

self.add(Extension("_random", ["_randommodule.c"],

extra_compile_args=['-DPy_BUILD_CORE_MODULE']))

# bisect

self.add(Extension("_bisect", ["_bisectmodule.c"]))

# heapq

self.add(Extension("_heapq", ["_heapqmodule.c"]))

# C-optimized pickle replacement

self.add(Extension("_pickle", ["_pickle.c"],

extra_compile_args=['-DPy_BUILD_CORE_MODULE']))

# atexit

self.add(Extension("atexit", ["atexitmodule.c"]))

# _json speedups

self.add(Extension("_json", ["_json.c"],

extra_compile_args=['-DPy_BUILD_CORE_MODULE']))

# profiler (_lsprof is for cProfile.py)

self.add(Extension('_lsprof', ['_lsprof.c', 'rotatingtree.c']))

# static Unicode character database

self.add(Extension('unicodedata', ['unicodedata.c'],

depends=['unicodedata_db.h', 'unicodename_db.h']))

# _opcode module

self.add(Extension('_opcode', ['_opcode.c']))

# asyncio speedups

self.add(Extension("_asyncio", ["_asynciomodule.c"],

extra_compile_args=['-DPy_BUILD_CORE_MODULE']))

# _abc speedups

self.add(Extension("_abc", ["_abc.c"]))

# _queue module

self.add(Extension("_queue", ["_queuemodule.c"]))

# _statistics module

self.add(Extension("_statistics", ["_statisticsmodule.c"]))

# 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 (self.config_h_vars.get('FLOCK_NEEDS_LIBBSD', False)):

# May be necessary on AIX for flock function

libs = ['bsd']

self.add(Extension('fcntl', ['fcntlmodule.c'],

libraries=libs))

# pwd(3)

self.add(Extension('pwd', ['pwdmodule.c']))

# grp(3)

if not VXWORKS:

self.add(Extension('grp', ['grpmodule.c']))

# spwd, shadow passwords

if (self.config_h_vars.get('HAVE_GETSPNAM', False) or

self.config_h_vars.get('HAVE_GETSPENT', False)):

self.add(Extension('spwd', ['spwdmodule.c']))

# AIX has shadow passwords, but access is not via getspent(), etc.

# module support is not expected so it not 'missing'

elif not AIX:

self.missing.append('spwd')

# select(2); not on ancient System V

self.add(Extension('select', ['selectmodule.c']))

# Fred Drake's interface to the Python parser

self.add(Extension('parser', ['parsermodule.c']))

# Memory-mapped files (also works on Win32).

self.add(Extension('mmap', ['mmapmodule.c']))

# Lance Ellinghaus's syslog module

# syslog daemon interface

self.add(Extension('syslog', ['syslogmodule.c']))

# Python interface to subinterpreter C-API.

self.add(Extension('_xxsubinterpreters', ['_xxsubinterpretersmodule.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.

# audioop needs libm for floor() in multiple functions.

self.add(Extension('audioop', ['audioop.c'],

libraries=['m']))

# CSV files

self.add(Extension('_csv', ['_csv.c']))

# POSIX subprocess module helper.

self.add(Extension('_posixsubprocess', ['_posixsubprocess.c']))

def detect_test_extensions(self):

# Python C API test module

self.add(Extension('_testcapi', ['_testcapimodule.c'],

depends=['testcapi_long.h']))

# Python Internal C API test module

self.add(Extension('_testinternalcapi', ['_testinternalcapi.c'],

extra_compile_args=['-DPy_BUILD_CORE_MODULE']))

# Python PEP-3118 (buffer protocol) test module

self.add(Extension('_testbuffer', ['_testbuffer.c']))

# Test loading multiple modules from one compiled file (https://bugs.python.org/issue16421)

self.add(Extension('_testimportmultiple', ['_testimportmultiple.c']))

# Test multi-phase extension module init (PEP 489)

self.add(Extension('_testmultiphase', ['_testmultiphase.c']))

# Fuzz tests.

self.add(Extension('_xxtestfuzz',

['_xxtestfuzz/_xxtestfuzz.c',

'_xxtestfuzz/fuzzer.c']))

def detect_readline_curses(self):

# readline

do_readline = self.compiler.find_library_file(self.lib_dirs, 'readline')

readline_termcap_library = ""

curses_library = ""

# Cannot use os.popen here in py3k.

tmpfile = os.path.join(self.build_temp, 'readline_termcap_lib')

if not os.path.exists(self.build_temp):

os.makedirs(self.build_temp)

# Determine if readline is already linked against curses or tinfo.

if do_readline:

if CROSS_COMPILING:

ret = run_command("%s -d %s | grep '(NEEDED)' > %s"

% (sysconfig.get_config_var('READELF'),

do_readline, tmpfile))

elif find_executable('ldd'):

ret = run_command("ldd %s > %s" % (do_readline, tmpfile))

else:

ret = 1

if ret == 0:

with open(tmpfile) as fp:

for ln in fp:

if 'curses' in ln:

readline_termcap_library = re.sub(

r'.*lib(n?cursesw?)\.so.*', r'\1', ln

).rstrip()

break

# termcap interface split out from ncurses

if 'tinfo' in ln:

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