--- a/lib/python3.8/site-packages/setuptools/command/build_ext.py	Mon Jul 27 03:47:31 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,330 +0,0 @@
-import os
-import sys
-import itertools
-from distutils.command.build_ext import build_ext as _du_build_ext
-from distutils.file_util import copy_file
-from distutils.ccompiler import new_compiler
-from distutils.sysconfig import customize_compiler, get_config_var
-from distutils.errors import DistutilsError
-from distutils import log
-
-from setuptools.extension import Library
-from setuptools.extern import six
-
-if six.PY2:
-    import imp
-
-    EXTENSION_SUFFIXES = [
-        s for s, _, tp in imp.get_suffixes() if tp == imp.C_EXTENSION]
-else:
-    from importlib.machinery import EXTENSION_SUFFIXES
-
-try:
-    # Attempt to use Cython for building extensions, if available
-    from Cython.Distutils.build_ext import build_ext as _build_ext
-    # Additionally, assert that the compiler module will load
-    # also. Ref #1229.
-    __import__('Cython.Compiler.Main')
-except ImportError:
-    _build_ext = _du_build_ext
-
-# make sure _config_vars is initialized
-get_config_var("LDSHARED")
-from distutils.sysconfig import _config_vars as _CONFIG_VARS  # noqa
-
-
-def _customize_compiler_for_shlib(compiler):
-    if sys.platform == "darwin":
-        # building .dylib requires additional compiler flags on OSX; here we
-        # temporarily substitute the pyconfig.h variables so that distutils'
-        # 'customize_compiler' uses them before we build the shared libraries.
-        tmp = _CONFIG_VARS.copy()
-        try:
-            # XXX Help!  I don't have any idea whether these are right...
-            _CONFIG_VARS['LDSHARED'] = (
-                "gcc -Wl,-x -dynamiclib -undefined dynamic_lookup")
-            _CONFIG_VARS['CCSHARED'] = " -dynamiclib"
-            _CONFIG_VARS['SO'] = ".dylib"
-            customize_compiler(compiler)
-        finally:
-            _CONFIG_VARS.clear()
-            _CONFIG_VARS.update(tmp)
-    else:
-        customize_compiler(compiler)
-
-
-have_rtld = False
-use_stubs = False
-libtype = 'shared'
-
-if sys.platform == "darwin":
-    use_stubs = True
-elif os.name != 'nt':
-    try:
-        import dl
-        use_stubs = have_rtld = hasattr(dl, 'RTLD_NOW')
-    except ImportError:
-        pass
-
-
-def if_dl(s):
-    return s if have_rtld else ''
-
-
-def get_abi3_suffix():
-    """Return the file extension for an abi3-compliant Extension()"""
-    for suffix in EXTENSION_SUFFIXES:
-        if '.abi3' in suffix:  # Unix
-            return suffix
-        elif suffix == '.pyd':  # Windows
-            return suffix
-
-
-class build_ext(_build_ext):
-    def run(self):
-        """Build extensions in build directory, then copy if --inplace"""
-        old_inplace, self.inplace = self.inplace, 0
-        _build_ext.run(self)
-        self.inplace = old_inplace
-        if old_inplace:
-            self.copy_extensions_to_source()
-
-    def copy_extensions_to_source(self):
-        build_py = self.get_finalized_command('build_py')
-        for ext in self.extensions:
-            fullname = self.get_ext_fullname(ext.name)
-            filename = self.get_ext_filename(fullname)
-            modpath = fullname.split('.')
-            package = '.'.join(modpath[:-1])
-            package_dir = build_py.get_package_dir(package)
-            dest_filename = os.path.join(package_dir,
-                                         os.path.basename(filename))
-            src_filename = os.path.join(self.build_lib, filename)
-
-            # Always copy, even if source is older than destination, to ensure
-            # that the right extensions for the current Python/platform are
-            # used.
-            copy_file(
-                src_filename, dest_filename, verbose=self.verbose,
-                dry_run=self.dry_run
-            )
-            if ext._needs_stub:
-                self.write_stub(package_dir or os.curdir, ext, True)
-
-    def get_ext_filename(self, fullname):
-        filename = _build_ext.get_ext_filename(self, fullname)
-        if fullname in self.ext_map:
-            ext = self.ext_map[fullname]
-            use_abi3 = (
-                not six.PY2
-                and getattr(ext, 'py_limited_api')
-                and get_abi3_suffix()
-            )
-            if use_abi3:
-                so_ext = get_config_var('EXT_SUFFIX')
-                filename = filename[:-len(so_ext)]
-                filename = filename + get_abi3_suffix()
-            if isinstance(ext, Library):
-                fn, ext = os.path.splitext(filename)
-                return self.shlib_compiler.library_filename(fn, libtype)
-            elif use_stubs and ext._links_to_dynamic:
-                d, fn = os.path.split(filename)
-                return os.path.join(d, 'dl-' + fn)
-        return filename
-
-    def initialize_options(self):
-        _build_ext.initialize_options(self)
-        self.shlib_compiler = None
-        self.shlibs = []
-        self.ext_map = {}
-
-    def finalize_options(self):
-        _build_ext.finalize_options(self)
-        self.extensions = self.extensions or []
-        self.check_extensions_list(self.extensions)
-        self.shlibs = [ext for ext in self.extensions
-                       if isinstance(ext, Library)]
-        if self.shlibs:
-            self.setup_shlib_compiler()
-        for ext in self.extensions:
-            ext._full_name = self.get_ext_fullname(ext.name)
-        for ext in self.extensions:
-            fullname = ext._full_name
-            self.ext_map[fullname] = ext
-
-            # distutils 3.1 will also ask for module names
-            # XXX what to do with conflicts?
-            self.ext_map[fullname.split('.')[-1]] = ext
-
-            ltd = self.shlibs and self.links_to_dynamic(ext) or False
-            ns = ltd and use_stubs and not isinstance(ext, Library)
-            ext._links_to_dynamic = ltd
-            ext._needs_stub = ns
-            filename = ext._file_name = self.get_ext_filename(fullname)
-            libdir = os.path.dirname(os.path.join(self.build_lib, filename))
-            if ltd and libdir not in ext.library_dirs:
-                ext.library_dirs.append(libdir)
-            if ltd and use_stubs and os.curdir not in ext.runtime_library_dirs:
-                ext.runtime_library_dirs.append(os.curdir)
-
-    def setup_shlib_compiler(self):
-        compiler = self.shlib_compiler = new_compiler(
-            compiler=self.compiler, dry_run=self.dry_run, force=self.force
-        )
-        _customize_compiler_for_shlib(compiler)
-
-        if self.include_dirs is not None:
-            compiler.set_include_dirs(self.include_dirs)
-        if self.define is not None:
-            # 'define' option is a list of (name,value) tuples
-            for (name, value) in self.define:
-                compiler.define_macro(name, value)
-        if self.undef is not None:
-            for macro in self.undef:
-                compiler.undefine_macro(macro)
-        if self.libraries is not None:
-            compiler.set_libraries(self.libraries)
-        if self.library_dirs is not None:
-            compiler.set_library_dirs(self.library_dirs)
-        if self.rpath is not None:
-            compiler.set_runtime_library_dirs(self.rpath)
-        if self.link_objects is not None:
-            compiler.set_link_objects(self.link_objects)
-
-        # hack so distutils' build_extension() builds a library instead
-        compiler.link_shared_object = link_shared_object.__get__(compiler)
-
-    def get_export_symbols(self, ext):
-        if isinstance(ext, Library):
-            return ext.export_symbols
-        return _build_ext.get_export_symbols(self, ext)
-
-    def build_extension(self, ext):
-        ext._convert_pyx_sources_to_lang()
-        _compiler = self.compiler
-        try:
-            if isinstance(ext, Library):
-                self.compiler = self.shlib_compiler
-            _build_ext.build_extension(self, ext)
-            if ext._needs_stub:
-                cmd = self.get_finalized_command('build_py').build_lib
-                self.write_stub(cmd, ext)
-        finally:
-            self.compiler = _compiler
-
-    def links_to_dynamic(self, ext):
-        """Return true if 'ext' links to a dynamic lib in the same package"""
-        # XXX this should check to ensure the lib is actually being built
-        # XXX as dynamic, and not just using a locally-found version or a
-        # XXX static-compiled version
-        libnames = dict.fromkeys([lib._full_name for lib in self.shlibs])
-        pkg = '.'.join(ext._full_name.split('.')[:-1] + [''])
-        return any(pkg + libname in libnames for libname in ext.libraries)
-
-    def get_outputs(self):
-        return _build_ext.get_outputs(self) + self.__get_stubs_outputs()
-
-    def __get_stubs_outputs(self):
-        # assemble the base name for each extension that needs a stub
-        ns_ext_bases = (
-            os.path.join(self.build_lib, *ext._full_name.split('.'))
-            for ext in self.extensions
-            if ext._needs_stub
-        )
-        # pair each base with the extension
-        pairs = itertools.product(ns_ext_bases, self.__get_output_extensions())
-        return list(base + fnext for base, fnext in pairs)
-
-    def __get_output_extensions(self):
-        yield '.py'
-        yield '.pyc'
-        if self.get_finalized_command('build_py').optimize:
-            yield '.pyo'
-
-    def write_stub(self, output_dir, ext, compile=False):
-        log.info("writing stub loader for %s to %s", ext._full_name,
-                 output_dir)
-        stub_file = (os.path.join(output_dir, *ext._full_name.split('.')) +
-                     '.py')
-        if compile and os.path.exists(stub_file):
-            raise DistutilsError(stub_file + " already exists! Please delete.")
-        if not self.dry_run:
-            f = open(stub_file, 'w')
-            f.write(
-                '\n'.join([
-                    "def __bootstrap__():",
-                    "   global __bootstrap__, __file__, __loader__",
-                    "   import sys, os, pkg_resources, imp" + if_dl(", dl"),
-                    "   __file__ = pkg_resources.resource_filename"
-                    "(__name__,%r)"
-                    % os.path.basename(ext._file_name),
-                    "   del __bootstrap__",
-                    "   if '__loader__' in globals():",
-                    "       del __loader__",
-                    if_dl("   old_flags = sys.getdlopenflags()"),
-                    "   old_dir = os.getcwd()",
-                    "   try:",
-                    "     os.chdir(os.path.dirname(__file__))",
-                    if_dl("     sys.setdlopenflags(dl.RTLD_NOW)"),
-                    "     imp.load_dynamic(__name__,__file__)",
-                    "   finally:",
-                    if_dl("     sys.setdlopenflags(old_flags)"),
-                    "     os.chdir(old_dir)",
-                    "__bootstrap__()",
-                    ""  # terminal \n
-                ])
-            )
-            f.close()
-        if compile:
-            from distutils.util import byte_compile
-
-            byte_compile([stub_file], optimize=0,
-                         force=True, dry_run=self.dry_run)
-            optimize = self.get_finalized_command('install_lib').optimize
-            if optimize > 0:
-                byte_compile([stub_file], optimize=optimize,
-                             force=True, dry_run=self.dry_run)
-            if os.path.exists(stub_file) and not self.dry_run:
-                os.unlink(stub_file)
-
-
-if use_stubs or os.name == 'nt':
-    # Build shared libraries
-    #
-    def link_shared_object(
-            self, objects, output_libname, output_dir=None, libraries=None,
-            library_dirs=None, runtime_library_dirs=None, export_symbols=None,
-            debug=0, extra_preargs=None, extra_postargs=None, build_temp=None,
-            target_lang=None):
-        self.link(
-            self.SHARED_LIBRARY, objects, output_libname,
-            output_dir, libraries, library_dirs, runtime_library_dirs,
-            export_symbols, debug, extra_preargs, extra_postargs,
-            build_temp, target_lang
-        )
-else:
-    # Build static libraries everywhere else
-    libtype = 'static'
-
-    def link_shared_object(
-            self, objects, output_libname, output_dir=None, libraries=None,
-            library_dirs=None, runtime_library_dirs=None, export_symbols=None,
-            debug=0, extra_preargs=None, extra_postargs=None, build_temp=None,
-            target_lang=None):
-        # XXX we need to either disallow these attrs on Library instances,
-        # or warn/abort here if set, or something...
-        # libraries=None, library_dirs=None, runtime_library_dirs=None,
-        # export_symbols=None, extra_preargs=None, extra_postargs=None,
-        # build_temp=None
-
-        assert output_dir is None  # distutils build_ext doesn't pass this
-        output_dir, filename = os.path.split(output_libname)
-        basename, ext = os.path.splitext(filename)
-        if self.library_filename("x").startswith('lib'):
-            # strip 'lib' prefix; this is kludgy if some platform uses
-            # a different prefix
-            basename = basename[3:]
-
-        self.create_static_lib(
-            objects, basename, output_dir, debug, target_lang
-        )