text: """Provide access to Python's configuration information.  The specific
  configuration variables available depend heavily on the platform and
  configuration.  The values may be retrieved using
  get_config_var(name), and the list of variables is available via
  get_config_vars().keys().  Additional convenience functions are also
  available.
  
  Written by:   Fred L. Drake, Jr.
  Email:        <fdrake@acm.org>
  """
  import _imp
  import os
  import re
  import sys
  from .errors import DistutilsPlatformError
  PREFIX = os.path.normpath(sys.prefix)
  EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
  BASE_PREFIX = os.path.normpath(sys.base_prefix)
  BASE_EXEC_PREFIX = os.path.normpath(sys.base_exec_prefix)
  if '_PYTHON_PROJECT_BASE' in os.environ:
      project_base = os.path.abspath(os.environ['_PYTHON_PROJECT_BASE'])
  else:
      project_base = os.path.dirname(os.path.abspath(sys.executable))
  if os.name == 'nt' and project_base.lower().endswith(('\\pcbuild\\win32',
      '\\pcbuild\\amd64')):
      project_base = os.path.dirname(os.path.dirname(project_base))
  
  
  def _is_python_source_dir(d):
      for fn in ('Setup.dist', 'Setup.local'):
          if os.path.isfile(os.path.join(d, 'Modules', fn)):
              return True
      return False
  
  
  _sys_home = getattr(sys, '_home', None)
  if _sys_home and os.name == 'nt' and _sys_home.lower().endswith((
      '\\pcbuild\\win32', '\\pcbuild\\amd64')):
      _sys_home = os.path.dirname(os.path.dirname(_sys_home))
  
  
  def _python_build():
      if _sys_home:
          return _is_python_source_dir(_sys_home)
      return _is_python_source_dir(project_base)
  
  
  python_build = _python_build()
  build_flags = ''
  try:
      if not python_build:
          build_flags = sys.abiflags
  except AttributeError:
      pass
  
  
  def get_python_version():
      """Return a string containing the major and minor Python version,
      leaving off the patchlevel.  Sample return values could be '1.5'
      or '2.2'.
      """
      return '%d.%d' % sys.version_info[:2]
  
  
  def get_python_inc(plat_specific=0, prefix=None):
      """Return the directory containing installed Python header files.
  
      If 'plat_specific' is false (the default), this is the path to the
      non-platform-specific header files, i.e. Python.h and so on;
      otherwise, this is the path to platform-specific header files
      (namely pyconfig.h).
  
      If 'prefix' is supplied, use it instead of sys.base_prefix or
      sys.base_exec_prefix -- i.e., ignore 'plat_specific'.
      """
      if prefix is None:
          prefix = plat_specific and BASE_EXEC_PREFIX or BASE_PREFIX
      if os.name == 'posix':
          if python_build:
              if plat_specific:
                  return _sys_home or project_base
              else:
                  incdir = os.path.join(get_config_var('srcdir'), 'Include')
                  return os.path.normpath(incdir)
          python_dir = 'python' + get_python_version() + build_flags
          return os.path.join(prefix, 'include', python_dir)
      elif os.name == 'nt':
          return os.path.join(prefix, 'include')
      else:
          raise DistutilsPlatformError(
              "I don't know where Python installs its C header files on platform '%s'"
               % os.name)
  
  
  def get_python_lib(plat_specific=0, standard_lib=0, prefix=None):
      """Return the directory containing the Python library (standard or
      site additions).
  
      If 'plat_specific' is true, return the directory containing
      platform-specific modules, i.e. any module from a non-pure-Python
      module distribution; otherwise, return the platform-shared library
      directory.  If 'standard_lib' is true, return the directory
      containing standard Python library modules; otherwise, return the
      directory for site-specific modules.
  
      If 'prefix' is supplied, use it instead of sys.base_prefix or
      sys.base_exec_prefix -- i.e., ignore 'plat_specific'.
      """
      if prefix is None:
          if standard_lib:
              prefix = plat_specific and BASE_EXEC_PREFIX or BASE_PREFIX
          else:
              prefix = plat_specific and EXEC_PREFIX or PREFIX
      if os.name == 'posix':
          libpython = os.path.join(prefix, 'lib', 'python' + get_python_version()
              )
          if standard_lib:
              return libpython
          else:
              return os.path.join(libpython, 'site-packages')
      elif os.name == 'nt':
          if standard_lib:
              return os.path.join(prefix, 'Lib')
          else:
              return os.path.join(prefix, 'Lib', 'site-packages')
      else:
          raise DistutilsPlatformError(
              "I don't know where Python installs its library on platform '%s'" %
              os.name)
  
  
  def customize_compiler(compiler):
      """Do any platform-specific customization of a CCompiler instance.
  
      Mainly needed on Unix, so we can plug in the information that
      varies across Unices and is stored in Python's Makefile.
      """
      if compiler.compiler_type == 'unix':
          if sys.platform == 'darwin':
              global _config_vars
              if not get_config_var('CUSTOMIZED_OSX_COMPILER'):
                  import _osx_support
                  _osx_support.customize_compiler(_config_vars)
                  _config_vars['CUSTOMIZED_OSX_COMPILER'] = 'True'
          (cc, cxx, opt, cflags, ccshared, ldshared, shlib_suffix, ar, ar_flags
              ) = (get_config_vars('CC', 'CXX', 'OPT', 'CFLAGS', 'CCSHARED',
              'LDSHARED', 'SHLIB_SUFFIX', 'AR', 'ARFLAGS'))
          if 'CC' in os.environ:
              newcc = os.environ['CC']
              if (sys.platform == 'darwin' and 'LDSHARED' not in os.environ and
                  ldshared.startswith(cc)):
                  ldshared = newcc + ldshared[len(cc):]
              cc = newcc
          if 'CXX' in os.environ:
              cxx = os.environ['CXX']
          if 'LDSHARED' in os.environ:
              ldshared = os.environ['LDSHARED']
          if 'CPP' in os.environ:
              cpp = os.environ['CPP']
          else:
              cpp = cc + ' -E'
          if 'LDFLAGS' in os.environ:
              ldshared = ldshared + ' ' + os.environ['LDFLAGS']
          if 'CFLAGS' in os.environ:
              cflags = opt + ' ' + os.environ['CFLAGS']
              ldshared = ldshared + ' ' + os.environ['CFLAGS']
          if 'CPPFLAGS' in os.environ:
              cpp = cpp + ' ' + os.environ['CPPFLAGS']
              cflags = cflags + ' ' + os.environ['CPPFLAGS']
              ldshared = ldshared + ' ' + os.environ['CPPFLAGS']
          if 'AR' in os.environ:
              ar = os.environ['AR']
          if 'ARFLAGS' in os.environ:
              archiver = ar + ' ' + os.environ['ARFLAGS']
          else:
              archiver = ar + ' ' + ar_flags
          cc_cmd = cc + ' ' + cflags
          compiler.set_executables(preprocessor=cpp, compiler=cc_cmd,
              compiler_so=cc_cmd + ' ' + ccshared, compiler_cxx=cxx,
              linker_so=ldshared, linker_exe=cc, archiver=archiver)
          compiler.shared_lib_extension = shlib_suffix
  
  
  def get_config_h_filename():
      """Return full pathname of installed pyconfig.h file."""
      if python_build:
          if os.name == 'nt':
              inc_dir = os.path.join(_sys_home or project_base, 'PC')
          else:
              inc_dir = _sys_home or project_base
      else:
          inc_dir = get_python_inc(plat_specific=1)
      return os.path.join(inc_dir, 'pyconfig.h')
  
  
  def get_makefile_filename():
      """Return full pathname of installed Makefile from the Python build."""
      if python_build:
          return os.path.join(_sys_home or project_base, 'Makefile')
      lib_dir = get_python_lib(plat_specific=0, standard_lib=1)
      config_file = 'config-{}{}'.format(get_python_version(), build_flags)
      if hasattr(sys.implementation, '_multiarch'):
          config_file += '-%s' % sys.implementation._multiarch
      return os.path.join(lib_dir, config_file, 'Makefile')
  
  
  def parse_config_h(fp, g=None):
      """Parse a config.h-style file.
  
      A dictionary containing name/value pairs is returned.  If an
      optional dictionary is passed in as the second argument, it is
      used instead of a new dictionary.
      """
      if g is None:
          g = {}
      define_rx = re.compile('#define ([A-Z][A-Za-z0-9_]+) (.*)\n')
      undef_rx = re.compile('/[*] #undef ([A-Z][A-Za-z0-9_]+) [*]/\n')
      while True:
          line = fp.readline()
          if not line:
              break
          m = define_rx.match(line)
          if m:
              n, v = m.group(1, 2)
              try:
                  v = int(v)
              except ValueError:
                  pass
              g[n] = v
          else:
              m = undef_rx.match(line)
              if m:
                  g[m.group(1)] = 0
      return g
  
  
  _variable_rx = re.compile('([a-zA-Z][a-zA-Z0-9_]+)\\s*=\\s*(.*)')
  _findvar1_rx = re.compile('\\$\\(([A-Za-z][A-Za-z0-9_]*)\\)')
  _findvar2_rx = re.compile('\\${([A-Za-z][A-Za-z0-9_]*)}')
  
  
  def parse_makefile(fn, g=None):
      """Parse a Makefile-style file.
  
      A dictionary containing name/value pairs is returned.  If an
      optional dictionary is passed in as the second argument, it is
      used instead of a new dictionary.
      """
      from distutils.text_file import TextFile
      fp = TextFile(fn, strip_comments=1, skip_blanks=1, join_lines=1, errors
          ='surrogateescape')
      if g is None:
          g = {}
      done = {}
      notdone = {}
      while True:
          line = fp.readline()
          if line is None:
              break
          m = _variable_rx.match(line)
          if m:
              n, v = m.group(1, 2)
              v = v.strip()
              tmpv = v.replace('$$', '')
              if '$' in tmpv:
                  notdone[n] = v
              else:
                  try:
                      v = int(v)
                  except ValueError:
                      done[n] = v.replace('$$', '$')
                  else:
                      done[n] = v
      renamed_variables = 'CFLAGS', 'LDFLAGS', 'CPPFLAGS'
      while notdone:
          for name in list(notdone):
              value = notdone[name]
              m = _findvar1_rx.search(value) or _findvar2_rx.search(value)
              if m:
                  n = m.group(1)
                  found = True
                  if n in done:
                      item = str(done[n])
                  elif n in notdone:
                      found = False
                  elif n in os.environ:
                      item = os.environ[n]
                  elif n in renamed_variables:
                      if name.startswith('PY_') and name[3:
                          ] in renamed_variables:
                          item = ''
                      elif 'PY_' + n in notdone:
                          found = False
                      else:
                          item = str(done['PY_' + n])
                  else:
                      done[n] = item = ''
                  if found:
                      after = value[m.end():]
                      value = value[:m.start()] + item + after
                      if '$' in after:
                          notdone[name] = value
                      else:
                          try:
                              value = int(value)
                          except ValueError:
                              done[name] = value.strip()
                          else:
                              done[name] = value
                          del notdone[name]
                          if name.startswith('PY_') and name[3:
                              ] in renamed_variables:
                              name = name[3:]
                              if name not in done:
                                  done[name] = value
              else:
                  del notdone[name]
      fp.close()
      for k, v in done.items():
          if isinstance(v, str):
              done[k] = v.strip()
      g.update(done)
      return g
  
  
  def expand_makefile_vars(s, vars):
      """Expand Makefile-style variables -- "${foo}" or "$(foo)" -- in
      'string' according to 'vars' (a dictionary mapping variable names to
      values).  Variables not present in 'vars' are silently expanded to the
      empty string.  The variable values in 'vars' should not contain further
      variable expansions; if 'vars' is the output of 'parse_makefile()',
      you're fine.  Returns a variable-expanded version of 's'.
      """
      while True:
          m = _findvar1_rx.search(s) or _findvar2_rx.search(s)
          if m:
              beg, end = m.span()
              s = s[0:beg] + vars.get(m.group(1)) + s[end:]
          else:
              break
      return s
  
  
  _config_vars = None
  
  
  def _init_posix():
      """Initialize the module as appropriate for POSIX systems."""
      name = os.environ.get('_PYTHON_SYSCONFIGDATA_NAME',
          '_sysconfigdata_{abi}_{platform}_{multiarch}'.format(abi=sys.
          abiflags, platform=sys.platform, multiarch=getattr(sys.
          implementation, '_multiarch', '')))
      _temp = __import__(name, globals(), locals(), ['build_time_vars'], 0)
      build_time_vars = _temp.build_time_vars
      global _config_vars
      _config_vars = {}
      _config_vars.update(build_time_vars)
  
  
  def _init_nt():
      """Initialize the module as appropriate for NT"""
      g = {}
      g['LIBDEST'] = get_python_lib(plat_specific=0, standard_lib=1)
      g['BINLIBDEST'] = get_python_lib(plat_specific=1, standard_lib=1)
      g['INCLUDEPY'] = get_python_inc(plat_specific=0)
      g['EXT_SUFFIX'] = _imp.extension_suffixes()[0]
      g['EXE'] = '.exe'
      g['VERSION'] = get_python_version().replace('.', '')
      g['BINDIR'] = os.path.dirname(os.path.abspath(sys.executable))
      global _config_vars
      _config_vars = g
  
  
  def get_config_vars(*args):
      """With no arguments, return a dictionary of all configuration
      variables relevant for the current platform.  Generally this includes
      everything needed to build extensions and install both pure modules and
      extensions.  On Unix, this means every variable defined in Python's
      installed Makefile; on Windows it's a much smaller set.
  
      With arguments, return a list of values that result from looking up
      each argument in the configuration variable dictionary.
      """
      global _config_vars
      if _config_vars is None:
          func = globals().get('_init_' + os.name)
          if func:
              func()
          else:
              _config_vars = {}
          _config_vars['prefix'] = PREFIX
          _config_vars['exec_prefix'] = EXEC_PREFIX
          SO = _config_vars.get('EXT_SUFFIX')
          if SO is not None:
              _config_vars['SO'] = SO
          srcdir = _config_vars.get('srcdir', project_base)
          if os.name == 'posix':
              if python_build:
                  base = os.path.dirname(get_makefile_filename())
                  srcdir = os.path.join(base, srcdir)
              else:
                  srcdir = os.path.dirname(get_makefile_filename())
          _config_vars['srcdir'] = os.path.abspath(os.path.normpath(srcdir))
          if python_build and os.name == 'posix':
              base = project_base
              if not os.path.isabs(_config_vars['srcdir']) and base != os.getcwd(
                  ):
                  srcdir = os.path.join(base, _config_vars['srcdir'])
                  _config_vars['srcdir'] = os.path.normpath(srcdir)
          if sys.platform == 'darwin':
              import _osx_support
              _osx_support.customize_config_vars(_config_vars)
      if args:
          vals = []
          for name in args:
              vals.append(_config_vars.get(name))
          return vals
      else:
          return _config_vars
  
  
  def get_config_var(name):
      """Return the value of a single variable using the dictionary
      returned by 'get_config_vars()'.  Equivalent to
      get_config_vars().get(name)
      """
      if name == 'SO':
          import warnings
          warnings.warn('SO is deprecated, use EXT_SUFFIX', DeprecationWarning, 2
              )
      return get_config_vars().get(name)
  