FM / python3.9

/usr/lib64/python3.9

Name	Size	Mode	Actions
asyncio/	-	0755	rm
collections/	-	0755	rm
concurrent/	-	0755	rm
config-3.9-x86_64-linux-gnu/	-	0755	rm
ctypes/	-	0755	rm
curses/	-	0755	rm
dbm/	-	0755	rm
distutils/	-	0755	rm
email/	-	0755	rm
encodings/	-	0755	rm
ensurepip/	-	0755	rm
html/	-	0755	rm
http/	-	0755	rm
importlib/	-	0755	rm
json/	-	0755	rm
lib-dynload/	-	0755	rm
lib2to3/	-	0755	rm
logging/	-	0755	rm
multiprocessing/	-	0755	rm
pydoc_data/	-	0755	rm
site-packages/	-	0755	rm
sqlite3/	-	0755	rm
unittest/	-	0755	rm
urllib/	-	0755	rm
venv/	-	0755	rm
wsgiref/	-	0755	rm
xml/	-	0755	rm
xmlrpc/	-	0755	rm
zoneinfo/	-	0755	rm
__pycache__/	-	0755	rm
abc.py	4920	0644	edit dl rm
aifc.py	32605	0644	edit dl rm
antigravity.py	500	0644	edit dl rm
argparse.py	98119	0644	edit dl rm
ast.py	56256	0644	edit dl rm
asynchat.py	11321	0644	edit dl rm
asyncore.py	20102	0644	edit dl rm
base64.py	19859	0755	edit dl rm
bdb.py	31389	0644	edit dl rm
binhex.py	14784	0644	edit dl rm
bisect.py	2350	0644	edit dl rm
bz2.py	12447	0644	edit dl rm
calendar.py	24832	0644	edit dl rm
cgi.py	33932	0755	edit dl rm
cgitb.py	12096	0644	edit dl rm
chunk.py	5435	0644	edit dl rm
cmd.py	14860	0644	edit dl rm
code.py	10622	0644	edit dl rm
codecs.py	36673	0644	edit dl rm
codeop.py	6326	0644	edit dl rm
colorsys.py	4064	0644	edit dl rm
compileall.py	20105	0644	edit dl rm
configparser.py	54584	0644	edit dl rm
contextlib.py	24624	0644	edit dl rm
contextvars.py	129	0644	edit dl rm
copy.py	8650	0644	edit dl rm
copyreg.py	7274	0644	edit dl rm
cProfile.py	6345	0755	edit dl rm
crypt.py	3819	0644	edit dl rm
csv.py	16144	0644	edit dl rm
dataclasses.py	49586	0644	edit dl rm
datetime.py	89177	0644	edit dl rm
decimal.py	320	0644	edit dl rm
difflib.py	83307	0644	edit dl rm
dis.py	20570	0644	edit dl rm
doctest.py	104568	0644	edit dl rm
enum.py	39440	0644	edit dl rm
filecmp.py	10024	0644	edit dl rm
fileinput.py	14791	0644	edit dl rm
fnmatch.py	6004	0644	edit dl rm
formatter.py	15143	0644	edit dl rm
fractions.py	24323	0644	edit dl rm
ftplib.py	35496	0644	edit dl rm
functools.py	38881	0644	edit dl rm
genericpath.py	5246	0644	edit dl rm
getopt.py	7489	0644	edit dl rm
getpass.py	5990	0644	edit dl rm
gettext.py	27266	0644	edit dl rm
glob.py	5823	0644	edit dl rm
graphlib.py	9573	0644	edit dl rm
gzip.py	21772	0644	edit dl rm
hashlib.py	8069	0644	edit dl rm
heapq.py	22877	0644	edit dl rm
hmac.py	8043	0644	edit dl rm
imaplib.py	55256	0644	edit dl rm
imghdr.py	3808	0644	edit dl rm
imp.py	10536	0644	edit dl rm
inspect.py	118235	0644	edit dl rm
io.py	3541	0644	edit dl rm
ipaddress.py	80924	0644	edit dl rm
keyword.py	1047	0644	edit dl rm
LICENSE.txt	13937	0644	edit dl rm
linecache.py	5461	0644	edit dl rm
locale.py	78271	0644	edit dl rm
lzma.py	13231	0644	edit dl rm
mailbox.py	78794	0644	edit dl rm
mailcap.py	9116	0644	edit dl rm
mimetypes.py	21564	0644	edit dl rm
modulefinder.py	24401	0644	edit dl rm
netrc.py	5566	0644	edit dl rm
nntplib.py	41023	0644	edit dl rm
ntpath.py	26460	0644	edit dl rm
nturl2path.py	2887	0644	edit dl rm
numbers.py	10338	0644	edit dl rm
opcode.py	5660	0644	edit dl rm
operator.py	10751	0644	edit dl rm
optparse.py	60369	0644	edit dl rm
os.py	39065	0644	edit dl rm
pathlib.py	51134	0644	edit dl rm
pdb.py	63237	0755	edit dl rm
pickle.py	64920	0644	edit dl rm
pickletools.py	93486	0644	edit dl rm
pipes.py	8916	0644	edit dl rm
pkgutil.py	24276	0644	edit dl rm
platform.py	40601	0755	edit dl rm
plistlib.py	28248	0644	edit dl rm
poplib.py	15198	0644	edit dl rm
posixpath.py	16146	0644	edit dl rm
pprint.py	22527	0644	edit dl rm
profile.py	22881	0755	edit dl rm
pstats.py	29326	0644	edit dl rm
pty.py	4807	0644	edit dl rm
pyclbr.py	15255	0644	edit dl rm
pydoc.py	109599	0755	edit dl rm
py_compile.py	8203	0644	edit dl rm
queue.py	11496	0644	edit dl rm
quopri.py	7266	0755	edit dl rm
random.py	31484	0644	edit dl rm
re.py	15861	0644	edit dl rm
reprlib.py	5267	0644	edit dl rm
rlcompleter.py	7648	0644	edit dl rm
runpy.py	13084	0644	edit dl rm
sched.py	6442	0644	edit dl rm
secrets.py	2036	0644	edit dl rm
selectors.py	19536	0644	edit dl rm
shelve.py	8527	0644	edit dl rm
shlex.py	13501	0644	edit dl rm
shutil.py	53030	0644	edit dl rm
signal.py	2438	0644	edit dl rm
site.py	22085	0644	edit dl rm
smtpd.py	34821	0755	edit dl rm
smtplib.py	45405	0755	edit dl rm
sndhdr.py	7099	0644	edit dl rm
socket.py	36915	0644	edit dl rm
socketserver.py	27296	0644	edit dl rm
sre_compile.py	27973	0644	edit dl rm
sre_constants.py	7177	0644	edit dl rm
sre_parse.py	40779	0644	edit dl rm
ssl.py	52622	0644	edit dl rm
stat.py	5485	0644	edit dl rm
statistics.py	38067	0644	edit dl rm
string.py	10566	0644	edit dl rm
stringprep.py	12917	0644	edit dl rm
struct.py	257	0644	edit dl rm
subprocess.py	83564	0644	edit dl rm
sunau.py	18158	0644	edit dl rm
symbol.py	2281	0644	edit dl rm
symtable.py	7905	0644	edit dl rm
sysconfig.py	25557	0644	edit dl rm
tabnanny.py	11406	0755	edit dl rm
tarfile.py	112939	0755	edit dl rm
telnetlib.py	23254	0644	edit dl rm
tempfile.py	27963	0644	edit dl rm
textwrap.py	19407	0644	edit dl rm
this.py	1003	0644	edit dl rm
threading.py	54176	0644	edit dl rm
timeit.py	13480	0755	edit dl rm
token.py	2368	0644	edit dl rm
tokenize.py	25883	0644	edit dl rm
trace.py	29207	0755	edit dl rm
traceback.py	24660	0644	edit dl rm
tracemalloc.py	18047	0644	edit dl rm
tty.py	879	0644	edit dl rm
types.py	9785	0644	edit dl rm
typing.py	77044	0644	edit dl rm
uu.py	7277	0644	edit dl rm
uuid.py	27324	0644	edit dl rm
warnings.py	19688	0644	edit dl rm
wave.py	18004	0644	edit dl rm
weakref.py	21560	0644	edit dl rm
webbrowser.py	24083	0755	edit dl rm
xdrlib.py	5913	0644	edit dl rm
zipapp.py	7535	0644	edit dl rm
zipfile.py	88899	0644	edit dl rm
zipimport.py	30765	0644	edit dl rm
_aix_support.py	3389	0644	edit dl rm
_bootlocale.py	1801	0644	edit dl rm
_bootsubprocess.py	2675	0644	edit dl rm
_collections_abc.py	29374	0644	edit dl rm
_compat_pickle.py	8749	0644	edit dl rm
_compression.py	5340	0644	edit dl rm
_markupbase.py	14623	0644	edit dl rm
_osx_support.py	21773	0644	edit dl rm
_pydecimal.py	228666	0644	edit dl rm
_pyio.py	93316	0644	edit dl rm
_py_abc.py	6189	0644	edit dl rm
_sitebuiltins.py	3115	0644	edit dl rm
_strptime.py	25277	0644	edit dl rm
_sysconfigdata__linux_x86_64-linux-gnu.py	41236	0644	edit dl rm
_threading_local.py	7220	0644	edit dl rm
_weakrefset.py	5923	0644	edit dl rm
__future__.py	5147	0644	edit dl rm
__phello__.foo.py	64	0644	edit dl rm

Edit: /usr/lib64/python3.9/_osx_support.py (21773B)

"""Shared OS X support functions."""

import os
import re
import sys

__all__ = [
    'compiler_fixup',
    'customize_config_vars',
    'customize_compiler',
    'get_platform_osx',
]

# configuration variables that may contain universal build flags,
# like "-arch" or "-isdkroot", that may need customization for
# the user environment
_UNIVERSAL_CONFIG_VARS = ('CFLAGS', 'LDFLAGS', 'CPPFLAGS', 'BASECFLAGS',
                            'BLDSHARED', 'LDSHARED', 'CC', 'CXX',
                            'PY_CFLAGS', 'PY_LDFLAGS', 'PY_CPPFLAGS',
                            'PY_CORE_CFLAGS', 'PY_CORE_LDFLAGS')

# configuration variables that may contain compiler calls
_COMPILER_CONFIG_VARS = ('BLDSHARED', 'LDSHARED', 'CC', 'CXX')

# prefix added to original configuration variable names
_INITPRE = '_OSX_SUPPORT_INITIAL_'

def _find_executable(executable, path=None):
    """Tries to find 'executable' in the directories listed in 'path'.

A string listing directories separated by 'os.pathsep'; defaults to
    os.environ['PATH'].  Returns the complete filename or None if not found.
    """
    if path is None:
        path = os.environ['PATH']

paths = path.split(os.pathsep)
    base, ext = os.path.splitext(executable)

if (sys.platform == 'win32') and (ext != '.exe'):
        executable = executable + '.exe'

if not os.path.isfile(executable):
        for p in paths:
            f = os.path.join(p, executable)
            if os.path.isfile(f):
                # the file exists, we have a shot at spawn working
                return f
        return None
    else:
        return executable

def _read_output(commandstring, capture_stderr=False):
    """Output from successful command execution or None"""
    # Similar to os.popen(commandstring, "r").read(),
    # but without actually using os.popen because that
    # function is not usable during python bootstrap.
    # tempfile is also not available then.
    import contextlib
    try:
        import tempfile
        fp = tempfile.NamedTemporaryFile()
    except ImportError:
        fp = open("/tmp/_osx_support.%s"%(
            os.getpid(),), "w+b")

with contextlib.closing(fp) as fp:
        if capture_stderr:
            cmd = "%s >'%s' 2>&1" % (commandstring, fp.name)
        else:
            cmd = "%s 2>/dev/null >'%s'" % (commandstring, fp.name)
        return fp.read().decode('utf-8').strip() if not os.system(cmd) else None

def _find_build_tool(toolname):
    """Find a build tool on current path or using xcrun"""
    return (_find_executable(toolname)
                or _read_output("/usr/bin/xcrun -find %s" % (toolname,))
                or ''
            )

_SYSTEM_VERSION = None

def _get_system_version():
    """Return the OS X system version as a string"""
    # Reading this plist is a documented way to get the system
    # version (see the documentation for the Gestalt Manager)
    # We avoid using platform.mac_ver to avoid possible bootstrap issues during
    # the build of Python itself (distutils is used to build standard library
    # extensions).

global _SYSTEM_VERSION

if _SYSTEM_VERSION is None:
        _SYSTEM_VERSION = ''
        try:
            f = open('/System/Library/CoreServices/SystemVersion.plist')
        except OSError:
            # We're on a plain darwin box, fall back to the default
            # behaviour.
            pass
        else:
            try:
                m = re.search(r'<key>ProductUserVisibleVersion</key>\s*'
                              r'<string>(.*?)</string>', f.read())
            finally:
                f.close()
            if m is not None:
                _SYSTEM_VERSION = '.'.join(m.group(1).split('.')[:2])
            # else: fall back to the default behaviour

return _SYSTEM_VERSION

_SYSTEM_VERSION_TUPLE = None
def _get_system_version_tuple():
    """
    Return the macOS system version as a tuple

The return value is safe to use to compare
    two version numbers.
    """
    global _SYSTEM_VERSION_TUPLE
    if _SYSTEM_VERSION_TUPLE is None:
        osx_version = _get_system_version()
        if osx_version:
            try:
                _SYSTEM_VERSION_TUPLE = tuple(int(i) for i in osx_version.split('.'))
            except ValueError:
                _SYSTEM_VERSION_TUPLE = ()

return _SYSTEM_VERSION_TUPLE

def _remove_original_values(_config_vars):
    """Remove original unmodified values for testing"""
    # This is needed for higher-level cross-platform tests of get_platform.
    for k in list(_config_vars):
        if k.startswith(_INITPRE):
            del _config_vars[k]

def _save_modified_value(_config_vars, cv, newvalue):
    """Save modified and original unmodified value of configuration var"""

oldvalue = _config_vars.get(cv, '')
    if (oldvalue != newvalue) and (_INITPRE + cv not in _config_vars):
        _config_vars[_INITPRE + cv] = oldvalue
    _config_vars[cv] = newvalue

_cache_default_sysroot = None
def _default_sysroot(cc):
    """ Returns the root of the default SDK for this system, or '/' """
    global _cache_default_sysroot

if _cache_default_sysroot is not None:
        return _cache_default_sysroot

contents = _read_output('%s -c -E -v - </dev/null' % (cc,), True)
    in_incdirs = False
    for line in contents.splitlines():
        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':
                _cache_default_sysroot = '/'
            elif line.endswith(".sdk/usr/include"):
                _cache_default_sysroot = line[:-12]
    if _cache_default_sysroot is None:
        _cache_default_sysroot = '/'

return _cache_default_sysroot

def _supports_universal_builds():
    """Returns True if universal builds are supported on this system"""
    # As an approximation, we assume that if we are running on 10.4 or above,
    # then we are running with an Xcode environment that supports universal
    # builds, in particular -isysroot and -arch arguments to the compiler. This
    # is in support of allowing 10.4 universal builds to run on 10.3.x systems.

osx_version = _get_system_version_tuple()
    return bool(osx_version >= (10, 4)) if osx_version else False

def _supports_arm64_builds():
    """Returns True if arm64 builds are supported on this system"""
    # There are two sets of systems supporting macOS/arm64 builds:
    # 1. macOS 11 and later, unconditionally
    # 2. macOS 10.15 with Xcode 12.2 or later
    # For now the second category is ignored.
    osx_version = _get_system_version_tuple()
    return osx_version >= (11, 0) if osx_version else False

def _find_appropriate_compiler(_config_vars):
    """Find appropriate C compiler for extension module builds"""

# Issue #13590:
    #    The OSX location for the compiler varies between OSX
    #    (or rather Xcode) releases.  With older releases (up-to 10.5)
    #    the compiler is in /usr/bin, with newer releases the compiler
    #    can only be found inside Xcode.app if the "Command Line Tools"
    #    are not installed.
    #
    #    Furthermore, the compiler that can be used varies between
    #    Xcode releases. Up to Xcode 4 it was possible to use 'gcc-4.2'
    #    as the compiler, after that 'clang' should be used because
    #    gcc-4.2 is either not present, or a copy of 'llvm-gcc' that
    #    miscompiles Python.

# skip checks if the compiler was overridden with a CC env variable
    if 'CC' in os.environ:
        return _config_vars

# The CC config var might contain additional arguments.
    # Ignore them while searching.
    cc = oldcc = _config_vars['CC'].split()[0]
    if not _find_executable(cc):
        # Compiler is not found on the shell search PATH.
        # Now search for clang, first on PATH (if the Command LIne
        # Tools have been installed in / or if the user has provided
        # another location via CC).  If not found, try using xcrun
        # to find an uninstalled clang (within a selected Xcode).

# NOTE: Cannot use subprocess here because of bootstrap
        # issues when building Python itself (and os.popen is
        # implemented on top of subprocess and is therefore not
        # usable as well)

cc = _find_build_tool('clang')

elif os.path.basename(cc).startswith('gcc'):
        # Compiler is GCC, check if it is LLVM-GCC
        data = _read_output("'%s' --version"
                             % (cc.replace("'", "'\"'\"'"),))
        if data and 'llvm-gcc' in data:
            # Found LLVM-GCC, fall back to clang
            cc = _find_build_tool('clang')

if not cc:
        raise SystemError(
               "Cannot locate working compiler")

if cc != oldcc:
        # Found a replacement compiler.
        # Modify config vars using new compiler, if not already explicitly
        # overridden by an env variable, preserving additional arguments.
        for cv in _COMPILER_CONFIG_VARS:
            if cv in _config_vars and cv not in os.environ:
                cv_split = _config_vars[cv].split()
                cv_split[0] = cc if cv != 'CXX' else cc + '++'
                _save_modified_value(_config_vars, cv, ' '.join(cv_split))

return _config_vars

def _remove_universal_flags(_config_vars):
    """Remove all universal build arguments from config vars"""

for cv in _UNIVERSAL_CONFIG_VARS:
        # Do not alter a config var explicitly overridden by env var
        if cv in _config_vars and cv not in os.environ:
            flags = _config_vars[cv]
            flags = re.sub(r'-arch\s+\w+\s', ' ', flags, flags=re.ASCII)
            flags = re.sub(r'-isysroot\s*\S+', ' ', flags)
            _save_modified_value(_config_vars, cv, flags)

return _config_vars

def _remove_unsupported_archs(_config_vars):
    """Remove any unsupported archs from config vars"""
    # Different Xcode releases support different sets for '-arch'
    # flags. In particular, Xcode 4.x no longer supports the
    # PPC architectures.
    #
    # This code automatically removes '-arch ppc' and '-arch ppc64'
    # when these are not supported. That makes it possible to
    # build extensions on OSX 10.7 and later with the prebuilt
    # 32-bit installer on the python.org website.

# skip checks if the compiler was overridden with a CC env variable
    if 'CC' in os.environ:
        return _config_vars

if re.search(r'-arch\s+ppc', _config_vars['CFLAGS']) is not None:
        # NOTE: Cannot use subprocess here because of bootstrap
        # issues when building Python itself
        status = os.system(
            """echo 'int main{};' | """
            """'%s' -c -arch ppc -x c -o /dev/null /dev/null 2>/dev/null"""
            %(_config_vars['CC'].replace("'", "'\"'\"'"),))
        if status:
            # The compile failed for some reason.  Because of differences
            # across Xcode and compiler versions, there is no reliable way
            # to be sure why it failed.  Assume here it was due to lack of
            # PPC support and remove the related '-arch' flags from each
            # config variables not explicitly overridden by an environment
            # variable.  If the error was for some other reason, we hope the
            # failure will show up again when trying to compile an extension
            # module.
            for cv in _UNIVERSAL_CONFIG_VARS:
                if cv in _config_vars and cv not in os.environ:
                    flags = _config_vars[cv]
                    flags = re.sub(r'-arch\s+ppc\w*\s', ' ', flags)
                    _save_modified_value(_config_vars, cv, flags)

return _config_vars

def _override_all_archs(_config_vars):
    """Allow override of all archs with ARCHFLAGS env var"""
    # NOTE: This name was introduced by Apple in OSX 10.5 and
    # is used by several scripting languages distributed with
    # that OS release.
    if 'ARCHFLAGS' in os.environ:
        arch = os.environ['ARCHFLAGS']
        for cv in _UNIVERSAL_CONFIG_VARS:
            if cv in _config_vars and '-arch' in _config_vars[cv]:
                flags = _config_vars[cv]
                flags = re.sub(r'-arch\s+\w+\s', ' ', flags)
                flags = flags + ' ' + arch
                _save_modified_value(_config_vars, cv, flags)

return _config_vars

def _check_for_unavailable_sdk(_config_vars):
    """Remove references to any SDKs not available"""
    # If we're on OSX 10.5 or later and the user tries to
    # compile an extension using an SDK that is not present
    # on the current machine it is better to not use an SDK
    # than to fail.  This is particularly important with
    # the standalone Command Line Tools alternative to a
    # full-blown Xcode install since the CLT packages do not
    # provide SDKs.  If the SDK is not present, it is assumed
    # that the header files and dev libs have been installed
    # to /usr and /System/Library by either a standalone CLT
    # package or the CLT component within Xcode.
    cflags = _config_vars.get('CFLAGS', '')
    m = re.search(r'-isysroot\s*(\S+)', cflags)
    if m is not None:
        sdk = m.group(1)
        if not os.path.exists(sdk):
            for cv in _UNIVERSAL_CONFIG_VARS:
                # Do not alter a config var explicitly overridden by env var
                if cv in _config_vars and cv not in os.environ:
                    flags = _config_vars[cv]
                    flags = re.sub(r'-isysroot\s*\S+(?:\s|$)', ' ', flags)
                    _save_modified_value(_config_vars, cv, flags)

return _config_vars

def compiler_fixup(compiler_so, cc_args):
    """
    This function will strip '-isysroot PATH' and '-arch ARCH' from the
    compile flags if the user has specified one them in extra_compile_flags.

This is needed because '-arch ARCH' adds another architecture to the
    build, without a way to remove an architecture. Furthermore GCC will
    barf if multiple '-isysroot' arguments are present.
    """
    stripArch = stripSysroot = False

compiler_so = list(compiler_so)

if not _supports_universal_builds():
        # OSX before 10.4.0, these don't support -arch and -isysroot at
        # all.
        stripArch = stripSysroot = True
    else:
        stripArch = '-arch' in cc_args
        stripSysroot = any(arg for arg in cc_args if arg.startswith('-isysroot'))

if stripArch or 'ARCHFLAGS' in os.environ:
        while True:
            try:
                index = compiler_so.index('-arch')
                # Strip this argument and the next one:
                del compiler_so[index:index+2]
            except ValueError:
                break

elif not _supports_arm64_builds():
        # Look for "-arch arm64" and drop that
        for idx in reversed(range(len(compiler_so))):
            if compiler_so[idx] == '-arch' and compiler_so[idx+1] == "arm64":
                del compiler_so[idx:idx+2]

if 'ARCHFLAGS' in os.environ and not stripArch:
        # User specified different -arch flags in the environ,
        # see also distutils.sysconfig
        compiler_so = compiler_so + os.environ['ARCHFLAGS'].split()

if stripSysroot:
        while True:
            indices = [i for i,x in enumerate(compiler_so) if x.startswith('-isysroot')]
            if not indices:
                break
            index = indices[0]
            if compiler_so[index] == '-isysroot':
                # Strip this argument and the next one:
                del compiler_so[index:index+2]
            else:
                # It's '-isysroot/some/path' in one arg
                del compiler_so[index:index+1]

# Check if the SDK that is used during compilation actually exists,
    # the universal build requires the usage of a universal SDK and not all
    # users have that installed by default.
    sysroot = None
    argvar = cc_args
    indices = [i for i,x in enumerate(cc_args) if x.startswith('-isysroot')]
    if not indices:
        argvar = compiler_so
        indices = [i for i,x in enumerate(compiler_so) if x.startswith('-isysroot')]

for idx in indices:
        if argvar[idx] == '-isysroot':
            sysroot = argvar[idx+1]
            break
        else:
            sysroot = argvar[idx][len('-isysroot'):]
            break

if sysroot and not os.path.isdir(sysroot):
        from distutils import log
        log.warn("Compiling with an SDK that doesn't seem to exist: %s",
                sysroot)
        log.warn("Please check your Xcode installation")

return compiler_so

def customize_config_vars(_config_vars):
    """Customize Python build configuration variables.

Called internally from sysconfig with a mutable mapping
    containing name/value pairs parsed from the configured
    makefile used to build this interpreter.  Returns
    the mapping updated as needed to reflect the environment
    in which the interpreter is running; in the case of
    a Python from a binary installer, the installed
    environment may be very different from the build
    environment, i.e. different OS levels, different
    built tools, different available CPU architectures.

This customization is performed whenever
    distutils.sysconfig.get_config_vars() is first
    called.  It may be used in environments where no
    compilers are present, i.e. when installing pure
    Python dists.  Customization of compiler paths
    and detection of unavailable archs is deferred
    until the first extension module build is
    requested (in distutils.sysconfig.customize_compiler).

Currently called from distutils.sysconfig
    """

if not _supports_universal_builds():
        # On Mac OS X before 10.4, check if -arch and -isysroot
        # are in CFLAGS or LDFLAGS and remove them if they are.
        # This is needed when building extensions on a 10.3 system
        # using a universal build of python.
        _remove_universal_flags(_config_vars)

# Allow user to override all archs with ARCHFLAGS env var
    _override_all_archs(_config_vars)

# Remove references to sdks that are not found
    _check_for_unavailable_sdk(_config_vars)

return _config_vars

def customize_compiler(_config_vars):
    """Customize compiler path and configuration variables.

This customization is performed when the first
    extension module build is requested
    in distutils.sysconfig.customize_compiler.
    """

# Find a compiler to use for extension module builds
    _find_appropriate_compiler(_config_vars)

# Remove ppc arch flags if not supported here
    _remove_unsupported_archs(_config_vars)

# Allow user to override all archs with ARCHFLAGS env var
    _override_all_archs(_config_vars)

return _config_vars

def get_platform_osx(_config_vars, osname, release, machine):
    """Filter values for get_platform()"""
    # called from get_platform() in sysconfig and distutils.util
    #
    # For our purposes, we'll assume that the system version from
    # distutils' perspective is what MACOSX_DEPLOYMENT_TARGET is set
    # to. This makes the compatibility story a bit more sane because the
    # machine is going to compile and link as if it were
    # MACOSX_DEPLOYMENT_TARGET.

macver = _config_vars.get('MACOSX_DEPLOYMENT_TARGET', '')
    macrelease = _get_system_version() or macver
    macver = macver or macrelease

if macver:
        release = macver
        osname = "macosx"

# Use the original CFLAGS value, if available, so that we
        # return the same machine type for the platform string.
        # Otherwise, distutils may consider this a cross-compiling
        # case and disallow installs.
        cflags = _config_vars.get(_INITPRE+'CFLAGS',
                                    _config_vars.get('CFLAGS', ''))
        if macrelease:
            try:
                macrelease = tuple(int(i) for i in macrelease.split('.')[0:2])
            except ValueError:
                macrelease = (10, 0)
        else:
            # assume no universal support
            macrelease = (10, 0)

if (macrelease >= (10, 4)) and '-arch' in cflags.strip():
            # The universal build will build fat binaries, but not on
            # systems before 10.4

machine = 'fat'

archs = re.findall(r'-arch\s+(\S+)', cflags)
            archs = tuple(sorted(set(archs)))

if len(archs) == 1:
                machine = archs[0]
            elif archs == ('arm64', 'x86_64'):
                machine = 'universal2'
            elif archs == ('i386', 'ppc'):
                machine = 'fat'
            elif archs == ('i386', 'x86_64'):
                machine = 'intel'
            elif archs == ('i386', 'ppc', 'x86_64'):
                machine = 'fat3'
            elif archs == ('ppc64', 'x86_64'):
                machine = 'fat64'
            elif archs == ('i386', 'ppc', 'ppc64', 'x86_64'):
                machine = 'universal'
            else:
                raise ValueError(
                   "Don't know machine value for archs=%r" % (archs,))

elif machine == 'i386':
            # On OSX the machine type returned by uname is always the
            # 32-bit variant, even if the executable architecture is
            # the 64-bit variant
            if sys.maxsize >= 2**32:
                machine = 'x86_64'

elif machine in ('PowerPC', 'Power_Macintosh'):
            # Pick a sane name for the PPC architecture.
            # See 'i386' case
            if sys.maxsize >= 2**32:
                machine = 'ppc64'
            else:
                machine = 'ppc'

return (osname, release, machine)

cmd: