code: #!/usr/bin/env python3
  """
  This file defines a set of system_info classes for getting
  information about various resources (libraries, library directories,
  include directories, etc.) in the system. Usage:
      info_dict = get_info(<name>)
    where <name> is a string 'atlas','x11','fftw','lapack','blas',
    'lapack_src', 'blas_src', etc. For a complete list of allowed names,
    see the definition of get_info() function below.
  
    Returned info_dict is a dictionary which is compatible with
    distutils.setup keyword arguments. If info_dict == {}, then the
    asked resource is not available (system_info could not find it).
  
    Several *_info classes specify an environment variable to specify
    the locations of software. When setting the corresponding environment
    variable to 'None' then the software will be ignored, even when it
    is available in system.
  
  Global parameters:
    system_info.search_static_first - search static libraries (.a)
               in precedence to shared ones (.so, .sl) if enabled.
    system_info.verbosity - output the results to stdout if enabled.
  
  The file 'site.cfg' is looked for in
  
  1) Directory of main setup.py file being run.
  2) Home directory of user running the setup.py file as ~/.numpy-site.cfg
  3) System wide directory (location of this file...)
  
  The first one found is used to get system configuration options The
  format is that used by ConfigParser (i.e., Windows .INI style). The
  section ALL is not intended for general use.
  
  Appropriate defaults are used if nothing is specified.
  
  The order of finding the locations of resources is the following:
   1. environment variable
   2. section in site.cfg
   3. DEFAULT section in site.cfg
   4. System default search paths (see ``default_*`` variables below).
  Only the first complete match is returned.
  
  Currently, the following classes are available, along with their section names:
  
      Numeric_info:Numeric
      _numpy_info:Numeric
      _pkg_config_info:None
      accelerate_info:accelerate
      agg2_info:agg2
      amd_info:amd
      atlas_3_10_blas_info:atlas
      atlas_3_10_blas_threads_info:atlas
      atlas_3_10_info:atlas
      atlas_3_10_threads_info:atlas
      atlas_blas_info:atlas
      atlas_blas_threads_info:atlas
      atlas_info:atlas
      atlas_threads_info:atlas
      blas64__opt_info:ALL               # usage recommended (general ILP64 BLAS, 64_ symbol suffix)
      blas_ilp64_opt_info:ALL            # usage recommended (general ILP64 BLAS)
      blas_ilp64_plain_opt_info:ALL      # usage recommended (general ILP64 BLAS, no symbol suffix)
      blas_info:blas
      blas_mkl_info:mkl
      blas_opt_info:ALL                  # usage recommended
      blas_src_info:blas_src
      blis_info:blis
      boost_python_info:boost_python
      dfftw_info:fftw
      dfftw_threads_info:fftw
      djbfft_info:djbfft
      f2py_info:ALL
      fft_opt_info:ALL
      fftw2_info:fftw
      fftw3_info:fftw3
      fftw_info:fftw
      fftw_threads_info:fftw
      flame_info:flame
      freetype2_info:freetype2
      gdk_2_info:gdk_2
      gdk_info:gdk
      gdk_pixbuf_2_info:gdk_pixbuf_2
      gdk_pixbuf_xlib_2_info:gdk_pixbuf_xlib_2
      gdk_x11_2_info:gdk_x11_2
      gtkp_2_info:gtkp_2
      gtkp_x11_2_info:gtkp_x11_2
      lapack64__opt_info:ALL             # usage recommended (general ILP64 LAPACK, 64_ symbol suffix)
      lapack_atlas_3_10_info:atlas
      lapack_atlas_3_10_threads_info:atlas
      lapack_atlas_info:atlas
      lapack_atlas_threads_info:atlas
      lapack_ilp64_opt_info:ALL          # usage recommended (general ILP64 LAPACK)
      lapack_ilp64_plain_opt_info:ALL    # usage recommended (general ILP64 LAPACK, no symbol suffix)
      lapack_info:lapack
      lapack_mkl_info:mkl
      lapack_opt_info:ALL                # usage recommended
      lapack_src_info:lapack_src
      mkl_info:mkl
      numarray_info:numarray
      numerix_info:numerix
      numpy_info:numpy
      openblas64__info:openblas64_
      openblas64__lapack_info:openblas64_
      openblas_clapack_info:openblas
      openblas_ilp64_info:openblas_ilp64
      openblas_ilp64_lapack_info:openblas_ilp64
      openblas_info:openblas
      openblas_lapack_info:openblas
      sfftw_info:fftw
      sfftw_threads_info:fftw
      system_info:ALL
      umfpack_info:umfpack
      wx_info:wx
      x11_info:x11
      xft_info:xft
  
  Note that blas_opt_info and lapack_opt_info honor the NPY_BLAS_ORDER
  and NPY_LAPACK_ORDER environment variables to determine the order in which
  specific BLAS and LAPACK libraries are searched for.
  
  This search (or autodetection) can be bypassed by defining the environment
  variables NPY_BLAS_LIBS and NPY_LAPACK_LIBS, which should then contain the
  exact linker flags to use (language will be set to F77). Building against
  Netlib BLAS/LAPACK or stub files, in order to be able to switch BLAS and LAPACK
  implementations at runtime. If using this to build NumPy itself, it is
  recommended to also define NPY_CBLAS_LIBS (assuming your BLAS library has a
  CBLAS interface) to enable CBLAS usage for matrix multiplication (unoptimized
  otherwise).
  
  Example:
  ----------
  [DEFAULT]
  # default section
  library_dirs = /usr/lib:/usr/local/lib:/opt/lib
  include_dirs = /usr/include:/usr/local/include:/opt/include
  src_dirs = /usr/local/src:/opt/src
  # search static libraries (.a) in preference to shared ones (.so)
  search_static_first = 0
  
  [fftw]
  libraries = rfftw, fftw
  
  [atlas]
  library_dirs = /usr/lib/3dnow:/usr/lib/3dnow/atlas
  # for overriding the names of the atlas libraries
  libraries = lapack, f77blas, cblas, atlas
  
  [x11]
  library_dirs = /usr/X11R6/lib
  include_dirs = /usr/X11R6/include
  ----------
  
  Note that the ``libraries`` key is the default setting for libraries.
  
  Authors:
    Pearu Peterson <pearu@cens.ioc.ee>, February 2002
    David M. Cooke <cookedm@physics.mcmaster.ca>, April 2002
  
  Copyright 2002 Pearu Peterson all rights reserved,
  Pearu Peterson <pearu@cens.ioc.ee>
  Permission to use, modify, and distribute this software is given under the
  terms of the NumPy (BSD style) license.  See LICENSE.txt that came with
  this distribution for specifics.
  
  NO WARRANTY IS EXPRESSED OR IMPLIED.  USE AT YOUR OWN RISK.
  
  """
  import sys
  import os
  import re
  import copy
  import warnings
  import subprocess
  import textwrap
  
  from glob import glob
  from functools import reduce
  from configparser import NoOptionError
  from configparser import RawConfigParser as ConfigParser
  # It seems that some people are importing ConfigParser from here so is
  # good to keep its class name. Use of RawConfigParser is needed in
  # order to be able to load path names with percent in them, like
  # `feature%2Fcool` which is common on git flow branch names.
  
  from distutils.errors import DistutilsError
  from distutils.dist import Distribution
  import sysconfig
  from numpy.distutils import log
  from distutils.util import get_platform
  
  from numpy.distutils.exec_command import (
      find_executable, filepath_from_subprocess_output,
      )
  from numpy.distutils.misc_util import (is_sequence, is_string,
                                         get_shared_lib_extension)
  from numpy.distutils.command.config import config as cmd_config
  from numpy.distutils import customized_ccompiler as _customized_ccompiler
  from numpy.distutils import _shell_utils
  import distutils.ccompiler
  import tempfile
  import shutil
  
  __all__ = ['system_info']
  
  # Determine number of bits
  import platform
  _bits = {'32bit': 32, '64bit': 64}
  platform_bits = _bits[platform.architecture()[0]]
  
  
  global_compiler = None
  
  def customized_ccompiler():
      global global_compiler
      if not global_compiler:
          global_compiler = _customized_ccompiler()
      return global_compiler
  
  
  def _c_string_literal(s):
      """
      Convert a python string into a literal suitable for inclusion into C code
      """
      # only these three characters are forbidden in C strings
      s = s.replace('\\', r'\\')
      s = s.replace('"',  r'\"')
      s = s.replace('\n', r'\n')
      return '"{}"'.format(s)
  
  
  def libpaths(paths, bits):
      """Return a list of library paths valid on 32 or 64 bit systems.
  
      Inputs:
        paths : sequence
          A sequence of strings (typically paths)
        bits : int
          An integer, the only valid values are 32 or 64.  A ValueError exception
        is raised otherwise.
  
      Examples:
  
      Consider a list of directories
      >>> paths = ['/usr/X11R6/lib','/usr/X11/lib','/usr/lib']
  
      For a 32-bit platform, this is already valid:
      >>> np.distutils.system_info.libpaths(paths,32)
      ['/usr/X11R6/lib', '/usr/X11/lib', '/usr/lib']
  
      On 64 bits, we prepend the '64' postfix
      >>> np.distutils.system_info.libpaths(paths,64)
      ['/usr/X11R6/lib64', '/usr/X11R6/lib', '/usr/X11/lib64', '/usr/X11/lib',
      '/usr/lib64', '/usr/lib']
      """
      if bits not in (32, 64):
          raise ValueError("Invalid bit size in libpaths: 32 or 64 only")
  
      # Handle 32bit case
      if bits == 32:
          return paths
  
      # Handle 64bit case
      out = []
      for p in paths:
          out.extend([p + '64', p])
  
      return out
  
  
  if sys.platform == 'win32':
      default_lib_dirs = ['C:\\',
                          os.path.join(sysconfig.get_config_var('exec_prefix'),
                                       'libs')]
      default_runtime_dirs = []
      default_include_dirs = []
      default_src_dirs = ['.']
      default_x11_lib_dirs = []
      default_x11_include_dirs = []
      _include_dirs = [
          'include',
          'include/suitesparse',
      ]
      _lib_dirs = [
          'lib',
      ]
  
      _include_dirs = [d.replace('/', os.sep) for d in _include_dirs]
      _lib_dirs = [d.replace('/', os.sep) for d in _lib_dirs]
      def add_system_root(library_root):
          """Add a package manager root to the include directories"""
          global default_lib_dirs
          global default_include_dirs
  
          library_root = os.path.normpath(library_root)
  
          default_lib_dirs.extend(
              os.path.join(library_root, d) for d in _lib_dirs)
          default_include_dirs.extend(
              os.path.join(library_root, d) for d in _include_dirs)
  
      # VCpkg is the de-facto package manager on windows for C/C++
      # libraries. If it is on the PATH, then we append its paths here.
      vcpkg = shutil.which('vcpkg')
      if vcpkg:
          vcpkg_dir = os.path.dirname(vcpkg)
          if platform.architecture()[0] == '32bit':
              specifier = 'x86'
          else:
              specifier = 'x64'
  
          vcpkg_installed = os.path.join(vcpkg_dir, 'installed')
          for vcpkg_root in [
              os.path.join(vcpkg_installed, specifier + '-windows'),
              os.path.join(vcpkg_installed, specifier + '-windows-static'),
          ]:
              add_system_root(vcpkg_root)
  
      # Conda is another popular package manager that provides libraries
      conda = shutil.which('conda')
      if conda:
          conda_dir = os.path.dirname(conda)
          add_system_root(os.path.join(conda_dir, '..', 'Library'))
          add_system_root(os.path.join(conda_dir, 'Library'))
  
  else:
      default_lib_dirs = libpaths(['/usr/local/lib', '/opt/lib', '/usr/lib',
                                   '/opt/local/lib', '/sw/lib'], platform_bits)
      default_runtime_dirs = []
      default_include_dirs = ['/usr/local/include',
                              '/opt/include',
                              # path of umfpack under macports
                              '/opt/local/include/ufsparse',
                              '/opt/local/include', '/sw/include',
                              '/usr/include/suitesparse']
      default_src_dirs = ['.', '/usr/local/src', '/opt/src', '/sw/src']
  
      default_x11_lib_dirs = libpaths(['/usr/X11R6/lib', '/usr/X11/lib',
                                       '/usr/lib'], platform_bits)
      default_x11_include_dirs = ['/usr/X11R6/include', '/usr/X11/include']
  
      if os.path.exists('/usr/lib/X11'):
          globbed_x11_dir = glob('/usr/lib/*/libX11.so')
          if globbed_x11_dir:
              x11_so_dir = os.path.split(globbed_x11_dir[0])[0]
              default_x11_lib_dirs.extend([x11_so_dir, '/usr/lib/X11'])
              default_x11_include_dirs.extend(['/usr/lib/X11/include',
                                               '/usr/include/X11'])
  
      # iOS: we need to cancel this call
      if (not os.getenv('PLATFORM').startswith('iphone')):
          with open(os.devnull, 'w') as tmp:
              try:
                  p = subprocess.Popen(["gcc", "-print-multiarch"], stdout=subprocess.PIPE,
                               stderr=tmp)
              except (OSError, DistutilsError):
                  # OSError if gcc is not installed, or SandboxViolation (DistutilsError
                  # subclass) if an old setuptools bug is triggered (see gh-3160).
                  pass
              else:
                  triplet = str(p.communicate()[0].decode().strip())
                  if p.returncode == 0:
                      # gcc supports the "-print-multiarch" option
                      default_x11_lib_dirs += [os.path.join("/usr/lib/", triplet)]
                      default_lib_dirs += [os.path.join("/usr/lib/", triplet)]
  
  
  if os.path.join(sys.prefix, 'lib') not in default_lib_dirs:
      default_lib_dirs.insert(0, os.path.join(sys.prefix, 'lib'))
      default_include_dirs.append(os.path.join(sys.prefix, 'include'))
      default_src_dirs.append(os.path.join(sys.prefix, 'src'))
  
  default_lib_dirs = [_m for _m in default_lib_dirs if os.path.isdir(_m)]
  default_runtime_dirs = [_m for _m in default_runtime_dirs if os.path.isdir(_m)]
  default_include_dirs = [_m for _m in default_include_dirs if os.path.isdir(_m)]
  default_src_dirs = [_m for _m in default_src_dirs if os.path.isdir(_m)]
  
  so_ext = get_shared_lib_extension()
  
  
  def get_standard_file(fname):
      """Returns a list of files named 'fname' from
      1) System-wide directory (directory-location of this module)
      2) Users HOME directory (os.environ['HOME'])
      3) Local directory
      """
      # System-wide file
      filenames = []
      try:
          f = __file__
      except NameError:
          f = sys.argv[0]
      sysfile = os.path.join(os.path.split(os.path.abspath(f))[0],
                             fname)
      if os.path.isfile(sysfile):
          filenames.append(sysfile)
  
      # Home directory
      # And look for the user config file
      try:
          f = os.path.expanduser('~')
      except KeyError:
          pass
      else:
          user_file = os.path.join(f, fname)
          if os.path.isfile(user_file):
              filenames.append(user_file)
  
      # Local file
      if os.path.isfile(fname):
          filenames.append(os.path.abspath(fname))
  
      return filenames
  
  
  def _parse_env_order(base_order, env):
      """ Parse an environment variable `env` by splitting with "," and only returning elements from `base_order`
  
      This method will sequence the environment variable and check for their
      individual elements in `base_order`.
  
      The items in the environment variable may be negated via '^item' or '!itema,itemb'.
      It must start with ^/! to negate all options.
  
      Raises
      ------
      ValueError: for mixed negated and non-negated orders or multiple negated orders
  
      Parameters
      ----------
      base_order : list of str
         the base list of orders
      env : str
         the environment variable to be parsed, if none is found, `base_order` is returned
  
      Returns
      -------
      allow_order : list of str
          allowed orders in lower-case
      unknown_order : list of str
          for values not overlapping with `base_order`
      """
      order_str = os.environ.get(env, None)
  
      # ensure all base-orders are lower-case (for easier comparison)
      base_order = [order.lower() for order in base_order]
      if order_str is None:
          return base_order, []
  
      neg = order_str.startswith('^') or order_str.startswith('!')
      # Check format
      order_str_l = list(order_str)
      sum_neg = order_str_l.count('^') + order_str_l.count('!')
      if neg:
          if sum_neg > 1:
              raise ValueError(f"Environment variable '{env}' may only contain a single (prefixed) negation: {order_str}")
          # remove prefix
          order_str = order_str[1:]
      elif sum_neg > 0:
          raise ValueError(f"Environment variable '{env}' may not mix negated an non-negated items: {order_str}")
  
      # Split and lower case
      orders = order_str.lower().split(',')
  
      # to inform callee about non-overlapping elements
      unknown_order = []
  
      # if negated, we have to remove from the order
      if neg:
          allow_order = base_order.copy()
  
          for order in orders:
              if not order:
                  continue
  
              if order not in base_order:
                  unknown_order.append(order)
                  continue
  
              if order in allow_order:
                  allow_order.remove(order)
  
      else:
          allow_order = []
  
          for order in orders:
              if not order:
                  continue
  
              if order not in base_order:
                  unknown_order.append(order)
                  continue
  
              if order not in allow_order:
                  allow_order.append(order)
  
      return allow_order, unknown_order
  
  
  def get_info(name, notfound_action=0):
      """
      notfound_action:
        0 - do nothing
        1 - display warning message
        2 - raise error
      """
      cl = {'atlas': atlas_info,  # use lapack_opt or blas_opt instead
            'atlas_threads': atlas_threads_info,                # ditto
            'atlas_blas': atlas_blas_info,
            'atlas_blas_threads': atlas_blas_threads_info,
            'lapack_atlas': lapack_atlas_info,  # use lapack_opt instead
            'lapack_atlas_threads': lapack_atlas_threads_info,  # ditto
            'atlas_3_10': atlas_3_10_info,  # use lapack_opt or blas_opt instead
            'atlas_3_10_threads': atlas_3_10_threads_info,                # ditto
            'atlas_3_10_blas': atlas_3_10_blas_info,
            'atlas_3_10_blas_threads': atlas_3_10_blas_threads_info,
            'lapack_atlas_3_10': lapack_atlas_3_10_info,  # use lapack_opt instead
            'lapack_atlas_3_10_threads': lapack_atlas_3_10_threads_info,  # ditto
            'flame': flame_info,          # use lapack_opt instead
            'mkl': mkl_info,
            # openblas which may or may not have embedded lapack
            'openblas': openblas_info,          # use blas_opt instead
            # openblas with embedded lapack
            'openblas_lapack': openblas_lapack_info, # use blas_opt instead
            'openblas_clapack': openblas_clapack_info, # use blas_opt instead
            'blis': blis_info,                  # use blas_opt instead
            'lapack_mkl': lapack_mkl_info,      # use lapack_opt instead
            'blas_mkl': blas_mkl_info,          # use blas_opt instead
            'accelerate': accelerate_info,      # use blas_opt instead
            'openblas64_': openblas64__info,
            'openblas64__lapack': openblas64__lapack_info,
            'openblas_ilp64': openblas_ilp64_info,
            'openblas_ilp64_lapack': openblas_ilp64_lapack_info,
            'x11': x11_info,
            'fft_opt': fft_opt_info,
            'fftw': fftw_info,
            'fftw2': fftw2_info,
            'fftw3': fftw3_info,
            'dfftw': dfftw_info,
            'sfftw': sfftw_info,
            'fftw_threads': fftw_threads_info,
            'dfftw_threads': dfftw_threads_info,
            'sfftw_threads': sfftw_threads_info,
            'djbfft': djbfft_info,
            'blas': blas_info,                  # use blas_opt instead
            'lapack': lapack_info,              # use lapack_opt instead
            'lapack_src': lapack_src_info,
            'blas_src': blas_src_info,
            'numpy': numpy_info,
            'f2py': f2py_info,
            'Numeric': Numeric_info,
            'numeric': Numeric_info,
            'numarray': numarray_info,
            'numerix': numerix_info,
            'lapack_opt': lapack_opt_info,
            'lapack_ilp64_opt': lapack_ilp64_opt_info,
            'lapack_ilp64_plain_opt': lapack_ilp64_plain_opt_info,
            'lapack64__opt': lapack64__opt_info,
            'blas_opt': blas_opt_info,
            'blas_ilp64_opt': blas_ilp64_opt_info,
            'blas_ilp64_plain_opt': blas_ilp64_plain_opt_info,
            'blas64__opt': blas64__opt_info,
            'boost_python': boost_python_info,
            'agg2': agg2_info,
            'wx': wx_info,
            'gdk_pixbuf_xlib_2': gdk_pixbuf_xlib_2_info,
            'gdk-pixbuf-xlib-2.0': gdk_pixbuf_xlib_2_info,
            'gdk_pixbuf_2': gdk_pixbuf_2_info,
            'gdk-pixbuf-2.0': gdk_pixbuf_2_info,
            'gdk': gdk_info,
            'gdk_2': gdk_2_info,
            'gdk-2.0': gdk_2_info,
            'gdk_x11_2': gdk_x11_2_info,
            'gdk-x11-2.0': gdk_x11_2_info,
            'gtkp_x11_2': gtkp_x11_2_info,
            'gtk+-x11-2.0': gtkp_x11_2_info,
            'gtkp_2': gtkp_2_info,
            'gtk+-2.0': gtkp_2_info,
            'xft': xft_info,
            'freetype2': freetype2_info,
            'umfpack': umfpack_info,
            'amd': amd_info,
            }.get(name.lower(), system_info)
      return cl().get_info(notfound_action)
  
  
  class NotFoundError(DistutilsError):
      """Some third-party program or library is not found."""
  
  
  class AliasedOptionError(DistutilsError):
      """
      Aliases entries in config files should not be existing.
      In section '{section}' we found multiple appearances of options {options}."""
  
  
  class AtlasNotFoundError(NotFoundError):
      """
      Atlas (http://github.com/math-atlas/math-atlas) libraries not found.
      Directories to search for the libraries can be specified in the
      numpy/distutils/site.cfg file (section [atlas]) or by setting
      the ATLAS environment variable."""
  
  
  class FlameNotFoundError(NotFoundError):
      """
      FLAME (http://www.cs.utexas.edu/~flame/web/) libraries not found.
      Directories to search for the libraries can be specified in the
      numpy/distutils/site.cfg file (section [flame])."""
  
  
  class LapackNotFoundError(NotFoundError):
      """
      Lapack (http://www.netlib.org/lapack/) libraries not found.
      Directories to search for the libraries can be specified in the
      numpy/distutils/site.cfg file (section [lapack]) or by setting
      the LAPACK environment variable."""
  
  
  class LapackSrcNotFoundError(LapackNotFoundError):
      """
      Lapack (http://www.netlib.org/lapack/) sources not found.
      Directories to search for the sources can be specified in the
      numpy/distutils/site.cfg file (section [lapack_src]) or by setting
      the LAPACK_SRC environment variable."""
  
  
  class LapackILP64NotFoundError(NotFoundError):
      """
      64-bit Lapack libraries not found.
      Known libraries in numpy/distutils/site.cfg file are:
      openblas64_, openblas_ilp64
      """
  
  class BlasOptNotFoundError(NotFoundError):
      """
      Optimized (vendor) Blas libraries are not found.
      Falls back to netlib Blas library which has worse performance.
      A better performance should be easily gained by switching
      Blas library."""
  
  class BlasNotFoundError(NotFoundError):
      """
      Blas (http://www.netlib.org/blas/) libraries not found.
      Directories to search for the libraries can be specified in the
      numpy/distutils/site.cfg file (section [blas]) or by setting
      the BLAS environment variable."""
  
  class BlasILP64NotFoundError(NotFoundError):
      """
      64-bit Blas libraries not found.
      Known libraries in numpy/distutils/site.cfg file are:
      openblas64_, openblas_ilp64
      """
  
  class BlasSrcNotFoundError(BlasNotFoundError):
      """
      Blas (http://www.netlib.org/blas/) sources not found.
      Directories to search for the sources can be specified in the
      numpy/distutils/site.cfg file (section [blas_src]) or by setting
      the BLAS_SRC environment variable."""
  
  
  class FFTWNotFoundError(NotFoundError):
      """
      FFTW (http://www.fftw.org/) libraries not found.
      Directories to search for the libraries can be specified in the
      numpy/distutils/site.cfg file (section [fftw]) or by setting
      the FFTW environment variable."""
  
  
  class DJBFFTNotFoundError(NotFoundError):
      """
      DJBFFT (https://cr.yp.to/djbfft.html) libraries not found.
      Directories to search for the libraries can be specified in the
      numpy/distutils/site.cfg file (section [djbfft]) or by setting
      the DJBFFT environment variable."""
  
  
  class NumericNotFoundError(NotFoundError):
      """
      Numeric (https://www.numpy.org/) module not found.
      Get it from above location, install it, and retry setup.py."""
  
  
  class X11NotFoundError(NotFoundError):
      """X11 libraries not found."""
  
  
  class UmfpackNotFoundError(NotFoundError):
      """
      UMFPACK sparse solver (https://www.cise.ufl.edu/research/sparse/umfpack/)
      not found. Directories to search for the libraries can be specified in the
      numpy/distutils/site.cfg file (section [umfpack]) or by setting
      the UMFPACK environment variable."""
  
  
  class system_info:
  
      """ get_info() is the only public method. Don't use others.
      """
      dir_env_var = None
      # XXX: search_static_first is disabled by default, may disappear in
      # future unless it is proved to be useful.
      search_static_first = 0
      # The base-class section name is a random word "ALL" and is not really
      # intended for general use. It cannot be None nor can it be DEFAULT as
      # these break the ConfigParser. See gh-15338
      section = 'ALL'
      saved_results = {}
  
      notfounderror = NotFoundError
  
      def __init__(self,
                    default_lib_dirs=default_lib_dirs,
                    default_include_dirs=default_include_dirs,
                    ):
          self.__class__.info = {}
          self.local_prefixes = []
          defaults = {'library_dirs': os.pathsep.join(default_lib_dirs),
                      'include_dirs': os.pathsep.join(default_include_dirs),
                      'runtime_library_dirs': os.pathsep.join(default_runtime_dirs),
                      'rpath': '',
                      'src_dirs': os.pathsep.join(default_src_dirs),
                      'search_static_first': str(self.search_static_first),
                      'extra_compile_args': '', 'extra_link_args': ''}
          self.cp = ConfigParser(defaults)
          self.files = []
          self.files.extend(get_standard_file('.numpy-site.cfg'))
          self.files.extend(get_standard_file('site.cfg'))
          self.parse_config_files()
  
          if self.section is not None:
              self.search_static_first = self.cp.getboolean(
                  self.section, 'search_static_first')
          assert isinstance(self.search_static_first, int)
  
      def parse_config_files(self):
          self.cp.read(self.files)
          if not self.cp.has_section(self.section):
              if self.section is not None:
                  self.cp.add_section(self.section)
  
      def calc_libraries_info(self):
          libs = self.get_libraries()
          dirs = self.get_lib_dirs()
          # The extensions use runtime_library_dirs
          r_dirs = self.get_runtime_lib_dirs()
          # Intrinsic distutils use rpath, we simply append both entries
          # as though they were one entry
          r_dirs.extend(self.get_runtime_lib_dirs(key='rpath'))
          info = {}
          for lib in libs:
              i = self.check_libs(dirs, [lib])
              if i is not None:
                  dict_append(info, **i)
              else:
                  log.info('Library %s was not found. Ignoring' % (lib))
  
              if r_dirs:
                  i = self.check_libs(r_dirs, [lib])
                  if i is not None:
                      # Swap library keywords found to runtime_library_dirs
                      # the libraries are insisting on the user having defined
                      # them using the library_dirs, and not necessarily by
                      # runtime_library_dirs
                      del i['libraries']
                      i['runtime_library_dirs'] = i.pop('library_dirs')
                      dict_append(info, **i)
                  else:
                      log.info('Runtime library %s was not found. Ignoring' % (lib))
  
          return info
  
      def set_info(self, **info):
          if info:
              lib_info = self.calc_libraries_info()
              dict_append(info, **lib_info)
              # Update extra information
              extra_info = self.calc_extra_info()
              dict_append(info, **extra_info)
          self.saved_results[self.__class__.__name__] = info
  
      def get_option_single(self, *options):
          """ Ensure that only one of `options` are found in the section
  
          Parameters
          ----------
          *options : list of str
             a list of options to be found in the section (``self.section``)
  
          Returns
          -------
          str :
              the option that is uniquely found in the section
  
          Raises
          ------
          AliasedOptionError :
              in case more than one of the options are found
          """
          found = [self.cp.has_option(self.section, opt) for opt in options]
          if sum(found) == 1:
              return options[found.index(True)]
          elif sum(found) == 0:
              # nothing is found anyways
              return options[0]
  
          # Else we have more than 1 key found
          if AliasedOptionError.__doc__ is None:
              raise AliasedOptionError()
          raise AliasedOptionError(AliasedOptionError.__doc__.format(
              section=self.section, options='[{}]'.format(', '.join(options))))
  
  
      def has_info(self):
          return self.__class__.__name__ in self.saved_results
  
      def calc_extra_info(self):
          """ Updates the information in the current information with
          respect to these flags:
            extra_compile_args
            extra_link_args
          """
          info = {}
          for key in ['extra_compile_args', 'extra_link_args']:
              # Get values
              opt = self.cp.get(self.section, key)
              opt = _shell_utils.NativeParser.split(opt)
              if opt:
                  tmp = {key: opt}
                  dict_append(info, **tmp)
          return info
  
      def get_info(self, notfound_action=0):
          """ Return a dictionary with items that are compatible
              with numpy.distutils.setup keyword arguments.
          """
          flag = 0
          if not self.has_info():
              flag = 1
              log.info(self.__class__.__name__ + ':')
              if hasattr(self, 'calc_info'):
                  self.calc_info()
              if notfound_action:
                  if not self.has_info():
                      if notfound_action == 1:
                          warnings.warn(self.notfounderror.__doc__, stacklevel=2)
                      elif notfound_action == 2:
                          raise self.notfounderror(self.notfounderror.__doc__)
                      else:
                          raise ValueError(repr(notfound_action))
  
              if not self.has_info():
                  log.info('  NOT AVAILABLE')
                  self.set_info()
              else:
                  log.info('  FOUND:')
  
          res = self.saved_results.get(self.__class__.__name__)
          if log.get_threshold() <= log.INFO and flag:
              for k, v in res.items():
                  v = str(v)
                  if k in ['sources', 'libraries'] and len(v) > 270:
                      v = v[:120] + '...\n...\n...' + v[-120:]
                  log.info('    %s = %s', k, v)
              log.info('')
  
          return copy.deepcopy(res)
  
      def get_paths(self, section, key):
          dirs = self.cp.get(section, key).split(os.pathsep)
          env_var = self.dir_env_var
          if env_var:
              if is_sequence(env_var):
                  e0 = env_var[-1]
                  for e in env_var:
                      if e in os.environ:
                          e0 = e
                          break
                  if not env_var[0] == e0:
                      log.info('Setting %s=%s' % (env_var[0], e0))
                  env_var = e0
          if env_var and env_var in os.environ:
              d = os.environ[env_var]
              if d == 'None':
                  log.info('Disabled %s: %s',
                           self.__class__.__name__, '(%s is None)'
                           % (env_var,))
                  return []
              if os.path.isfile(d):
                  dirs = [os.path.dirname(d)] + dirs
                  l = getattr(self, '_lib_names', [])
                  if len(l) == 1:
                      b = os.path.basename(d)
                      b = os.path.splitext(b)[0]
                      if b[:3] == 'lib':
                          log.info('Replacing _lib_names[0]==%r with %r' \
                                % (self._lib_names[0], b[3:]))
                          self._lib_names[0] = b[3:]
              else:
                  ds = d.split(os.pathsep)
                  ds2 = []
                  for d in ds:
                      if os.path.isdir(d):
                          ds2.append(d)
                          for dd in ['include', 'lib']:
                              d1 = os.path.join(d, dd)
                              if os.path.isdir(d1):
                                  ds2.append(d1)
                  dirs = ds2 + dirs
          default_dirs = self.cp.get(self.section, key).split(os.pathsep)
          dirs.extend(default_dirs)
          ret = []
          for d in dirs:
              if len(d) > 0 and not os.path.isdir(d):
                  warnings.warn('Specified path %s is invalid.' % d, stacklevel=2)
                  continue
  
              if d not in ret:
                  ret.append(d)
  
          log.debug('( %s = %s )', key, ':'.join(ret))
          return ret
  
      def get_lib_dirs(self, key='library_dirs'):
          return self.get_paths(self.section, key)
  
      def get_runtime_lib_dirs(self, key='runtime_library_dirs'):
          path = self.get_paths(self.section, key)
          if path == ['']:
              path = []
          return path
  
      def get_include_dirs(self, key='include_dirs'):
          return self.get_paths(self.section, key)
  
      def get_src_dirs(self, key='src_dirs'):
          return self.get_paths(self.section, key)
  
      def get_libs(self, key, default):
          try:
              libs = self.cp.get(self.section, key)
          except NoOptionError:
              if not default:
                  return []
              if is_string(default):
                  return [default]
              return default
          return [b for b in [a.strip() for a in libs.split(',')] if b]
  
      def get_libraries(self, key='libraries'):
          if hasattr(self, '_lib_names'):
              return self.get_libs(key, default=self._lib_names)
          else:
              return self.get_libs(key, '')
  
      def library_extensions(self):
          c = customized_ccompiler()
          static_exts = []
          if c.compiler_type != 'msvc':
              # MSVC doesn't understand binutils
              static_exts.append('.a')
          if sys.platform == 'win32':
              static_exts.append('.lib')  # .lib is used by MSVC and others
          if self.search_static_first:
              exts = static_exts + [so_ext]
          else:
              exts = [so_ext] + static_exts
          if sys.platform == 'cygwin':
              exts.append('.dll.a')
          if sys.platform == 'darwin':
              exts.append('.dylib')
          return exts
  
      def check_libs(self, lib_dirs, libs, opt_libs=[]):
          """If static or shared libraries are available then return
          their info dictionary.
  
          Checks for all libraries as shared libraries first, then
          static (or vice versa if self.search_static_first is True).
          """
          exts = self.library_extensions()
          info = None
          for ext in exts:
              info = self._check_libs(lib_dirs, libs, opt_libs, [ext])
              if info is not None:
                  break
          if not info:
              log.info('  libraries %s not found in %s', ','.join(libs),
                       lib_dirs)
          return info
  
      def check_libs2(self, lib_dirs, libs, opt_libs=[]):
          """If static or shared libraries are available then return
          their info dictionary.
  
          Checks each library for shared or static.
          """
          exts = self.library_extensions()
          info = self._check_libs(lib_dirs, libs, opt_libs, exts)
          if not info:
              log.info('  libraries %s not found in %s', ','.join(libs),
                       lib_dirs)
  
          return info
  
      def _find_lib(self, lib_dir, lib, exts):
          assert is_string(lib_dir)
          # under windows first try without 'lib' prefix
          if sys.platform == 'win32':
              lib_prefixes = ['', 'lib']
          else:
              lib_prefixes = ['lib']
          # for each library name, see if we can find a file for it.
          for ext in exts:
              for prefix in lib_prefixes:
                  p = self.combine_paths(lib_dir, prefix + lib + ext)
                  if p:
                      break
              if p:
                  assert len(p) == 1
                  # ??? splitext on p[0] would do this for cygwin
                  # doesn't seem correct
                  if ext == '.dll.a':
                      lib += '.dll'
                  if ext == '.lib':
                      lib = prefix + lib
                  return lib
  
          return False
  
      def _find_libs(self, lib_dirs, libs, exts):
          # make sure we preserve the order of libs, as it can be important
          found_dirs, found_libs = [], []
          for lib in libs:
              for lib_dir in lib_dirs:
                  found_lib = self._find_lib(lib_dir, lib, exts)
                  if found_lib:
                      found_libs.append(found_lib)
                      if lib_dir not in found_dirs:
                          found_dirs.append(lib_dir)
                      break
          return found_dirs, found_libs
  
      def _check_libs(self, lib_dirs, libs, opt_libs, exts):
          """Find mandatory and optional libs in expected paths.
  
          Missing optional libraries are silently forgotten.
          """
          if not is_sequence(lib_dirs):
              lib_dirs = [lib_dirs]
          # First, try to find the mandatory libraries
          found_dirs, found_libs = self._find_libs(lib_dirs, libs, exts)
          if len(found_libs) > 0 and len(found_libs) == len(libs):
              # Now, check for optional libraries
              opt_found_dirs, opt_found_libs = self._find_libs(lib_dirs, opt_libs, exts)
              found_libs.extend(opt_found_libs)
              for lib_dir in opt_found_dirs:
                  if lib_dir not in found_dirs:
                      found_dirs.append(lib_dir)
              info = {'libraries': found_libs, 'library_dirs': found_dirs}
              return info
          else:
              return None
  
      def combine_paths(self, *args):
          """Return a list of existing paths composed by all combinations
          of items from the arguments.
          """
          return combine_paths(*args)
  
  
  class fft_opt_info(system_info):
  
      def calc_info(self):
          info = {}
          fftw_info = get_info('fftw3') or get_info('fftw2') or get_info('dfftw')
          djbfft_info = get_info('djbfft')
          if fftw_info:
              dict_append(info, **fftw_info)
              if djbfft_info:
                  dict_append(info, **djbfft_info)
              self.set_info(**info)
              return
  
  
  class fftw_info(system_info):
      #variables to override
      section = 'fftw'
      dir_env_var = 'FFTW'
      notfounderror = FFTWNotFoundError
      ver_info = [{'name':'fftw3',
                      'libs':['fftw3'],
                      'includes':['fftw3.h'],
                      'macros':[('SCIPY_FFTW3_H', None)]},
                    {'name':'fftw2',
                      'libs':['rfftw', 'fftw'],
                      'includes':['fftw.h', 'rfftw.h'],
                      'macros':[('SCIPY_FFTW_H', None)]}]
  
      def calc_ver_info(self, ver_param):
          """Returns True on successful version detection, else False"""
          lib_dirs = self.get_lib_dirs()
          incl_dirs = self.get_include_dirs()
  
          opt = self.get_option_single(self.section + '_libs', 'libraries')
          libs = self.get_libs(opt, ver_param['libs'])
          info = self.check_libs(lib_dirs, libs)
          if info is not None:
              flag = 0
              for d in incl_dirs:
                  if len(self.combine_paths(d, ver_param['includes'])) \
                     == len(ver_param['includes']):
                      dict_append(info, include_dirs=[d])
                      flag = 1
                      break
              if flag:
                  dict_append(info, define_macros=ver_param['macros'])
              else:
                  info = None
          if info is not None:
              self.set_info(**info)
              return True
          else:
              log.info('  %s not found' % (ver_param['name']))
              return False
  
      def calc_info(self):
          for i in self.ver_info:
              if self.calc_ver_info(i):
                  break
  
  
  class fftw2_info(fftw_info):
      #variables to override
      section = 'fftw'
      dir_env_var = 'FFTW'
      notfounderror = FFTWNotFoundError
      ver_info = [{'name':'fftw2',
                      'libs':['rfftw', 'fftw'],
                      'includes':['fftw.h', 'rfftw.h'],
                      'macros':[('SCIPY_FFTW_H', None)]}
                    ]
  
  
  class fftw3_info(fftw_info):
      #variables to override
      section = 'fftw3'
      dir_env_var = 'FFTW3'
      notfounderror = FFTWNotFoundError
      ver_info = [{'name':'fftw3',
                      'libs':['fftw3'],
                      'includes':['fftw3.h'],
                      'macros':[('SCIPY_FFTW3_H', None)]},
                    ]
  
  
  class dfftw_info(fftw_info):
      section = 'fftw'
      dir_env_var = 'FFTW'
      ver_info = [{'name':'dfftw',
                      'libs':['drfftw', 'dfftw'],
                      'includes':['dfftw.h', 'drfftw.h'],
                      'macros':[('SCIPY_DFFTW_H', None)]}]
  
  
  class sfftw_info(fftw_info):
      section = 'fftw'
      dir_env_var = 'FFTW'
      ver_info = [{'name':'sfftw',
                      'libs':['srfftw', 'sfftw'],
                      'includes':['sfftw.h', 'srfftw.h'],
                      'macros':[('SCIPY_SFFTW_H', None)]}]
  
  
  class fftw_threads_info(fftw_info):
      section = 'fftw'
      dir_env_var = 'FFTW'
      ver_info = [{'name':'fftw threads',
                      'libs':['rfftw_threads', 'fftw_threads'],
                      'includes':['fftw_threads.h', 'rfftw_threads.h'],
                      'macros':[('SCIPY_FFTW_THREADS_H', None)]}]
  
  
  class dfftw_threads_info(fftw_info):
      section = 'fftw'
      dir_env_var = 'FFTW'
      ver_info = [{'name':'dfftw threads',
                      'libs':['drfftw_threads', 'dfftw_threads'],
                      'includes':['dfftw_threads.h', 'drfftw_threads.h'],
                      'macros':[('SCIPY_DFFTW_THREADS_H', None)]}]
  
  
  class sfftw_threads_info(fftw_info):
      section = 'fftw'
      dir_env_var = 'FFTW'
      ver_info = [{'name':'sfftw threads',
                      'libs':['srfftw_threads', 'sfftw_threads'],
                      'includes':['sfftw_threads.h', 'srfftw_threads.h'],
                      'macros':[('SCIPY_SFFTW_THREADS_H', None)]}]
  
  
  class djbfft_info(system_info):
      section = 'djbfft'
      dir_env_var = 'DJBFFT'
      notfounderror = DJBFFTNotFoundError
  
      def get_paths(self, section, key):
          pre_dirs = system_info.get_paths(self, section, key)
          dirs = []
          for d in pre_dirs:
              dirs.extend(self.combine_paths(d, ['djbfft']) + [d])
          return [d for d in dirs if os.path.isdir(d)]
  
      def calc_info(self):
          lib_dirs = self.get_lib_dirs()
          incl_dirs = self.get_include_dirs()
          info = None
          for d in lib_dirs:
              p = self.combine_paths(d, ['djbfft.a'])
              if p:
                  info = {'extra_objects': p}
                  break
              p = self.combine_paths(d, ['libdjbfft.a', 'libdjbfft' + so_ext])
              if p:
                  info = {'libraries': ['djbfft'], 'library_dirs': [d]}
                  break
          if info is None:
              return
          for d in incl_dirs:
              if len(self.combine_paths(d, ['fftc8.h', 'fftfreq.h'])) == 2:
                  dict_append(info, include_dirs=[d],
                              define_macros=[('SCIPY_DJBFFT_H', None)])
                  self.set_info(**info)
                  return
          return
  
  
  class mkl_info(system_info):
      section = 'mkl'
      dir_env_var = 'MKLROOT'
      _lib_mkl = ['mkl_rt']
  
      def get_mkl_rootdir(self):
          mklroot = os.environ.get('MKLROOT', None)
          if mklroot is not None:
              return mklroot
          paths = os.environ.get('LD_LIBRARY_PATH', '').split(os.pathsep)
          ld_so_conf = '/etc/ld.so.conf'
          if os.path.isfile(ld_so_conf):
              with open(ld_so_conf, 'r') as f:
                  for d in f:
                      d = d.strip()
                      if d:
                          paths.append(d)
          intel_mkl_dirs = []
          for path in paths:
              path_atoms = path.split(os.sep)
              for m in path_atoms:
                  if m.startswith('mkl'):
                      d = os.sep.join(path_atoms[:path_atoms.index(m) + 2])
                      intel_mkl_dirs.append(d)
                      break
          for d in paths:
              dirs = glob(os.path.join(d, 'mkl', '*'))
              dirs += glob(os.path.join(d, 'mkl*'))
              for sub_dir in dirs:
                  if os.path.isdir(os.path.join(sub_dir, 'lib')):
                      return sub_dir
          return None
  
      def __init__(self):
          mklroot = self.get_mkl_rootdir()
          if mklroot is None:
              system_info.__init__(self)
          else:
              from .cpuinfo import cpu
              if cpu.is_Itanium():
                  plt = '64'
              elif cpu.is_Intel() and cpu.is_64bit():
                  plt = 'intel64'
              else:
                  plt = '32'
              system_info.__init__(
                  self,
                  default_lib_dirs=[os.path.join(mklroot, 'lib', plt)],
                  default_include_dirs=[os.path.join(mklroot, 'include')])
  
      def calc_info(self):
          lib_dirs = self.get_lib_dirs()
          incl_dirs = self.get_include_dirs()
          opt = self.get_option_single('mkl_libs', 'libraries')
          mkl_libs = self.get_libs(opt, self._lib_mkl)
          info = self.check_libs2(lib_dirs, mkl_libs)
          if info is None:
              return
          dict_append(info,
                      define_macros=[('SCIPY_MKL_H', None),
                                     ('HAVE_CBLAS', None)],
                      include_dirs=incl_dirs)
          if sys.platform == 'win32':
              pass  # win32 has no pthread library
          else:
              dict_append(info, libraries=['pthread'])
          self.set_info(**info)
  
  
  class lapack_mkl_info(mkl_info):
      pass
  
  
  class blas_mkl_info(mkl_info):
      pass
  
  
  class atlas_info(system_info):
      section = 'atlas'
      dir_env_var = 'ATLAS'
      _lib_names = ['f77blas', 'cblas']
      if sys.platform[:7] == 'freebsd':
          _lib_atlas = ['atlas_r']
          _lib_lapack = ['alapack_r']
      else:
          _lib_atlas = ['atlas']
          _lib_lapack = ['lapack']
  
      notfounderror = AtlasNotFoundError
  
      def get_paths(self, section, key):
          pre_dirs = system_info.get_paths(self, section, key)
          dirs = []
          for d in pre_dirs:
              dirs.extend(self.combine_paths(d, ['atlas*', 'ATLAS*',
                                           'sse', '3dnow', 'sse2']) + [d])
          return [d for d in dirs if os.path.isdir(d)]
  
      def calc_info(self):
          lib_dirs = self.get_lib_dirs()
          info = {}
          opt = self.get_option_single('atlas_libs', 'libraries')
          atlas_libs = self.get_libs(opt, self._lib_names + self._lib_atlas)
          lapack_libs = self.get_libs('lapack_libs', self._lib_lapack)
          atlas = None
          lapack = None
          atlas_1 = None
          for d in lib_dirs:
              atlas = self.check_libs2(d, atlas_libs, [])
              if atlas is not None:
                  lib_dirs2 = [d] + self.combine_paths(d, ['atlas*', 'ATLAS*'])
                  lapack = self.check_libs2(lib_dirs2, lapack_libs, [])
                  if lapack is not None:
                      break
              if atlas:
                  atlas_1 = atlas
          log.info(self.__class__)
          if atlas is None:
              atlas = atlas_1
          if atlas is None:
              return
          include_dirs = self.get_include_dirs()
          h = (self.combine_paths(lib_dirs + include_dirs, 'cblas.h') or [None])
          h = h[0]
          if h:
              h = os.path.dirname(h)
              dict_append(info, include_dirs=[h])
          info['language'] = 'c'
          if lapack is not None:
              dict_append(info, **lapack)
              dict_append(info, **atlas)
          elif 'lapack_atlas' in atlas['libraries']:
              dict_append(info, **atlas)
              dict_append(info,
                          define_macros=[('ATLAS_WITH_LAPACK_ATLAS', None)])
              self.set_info(**info)
              return
          else:
              dict_append(info, **atlas)
              dict_append(info, define_macros=[('ATLAS_WITHOUT_LAPACK', None)])
              message = textwrap.dedent("""
                  *********************************************************************
                      Could not find lapack library within the ATLAS installation.
                  *********************************************************************
                  """)
              warnings.warn(message, stacklevel=2)
              self.set_info(**info)
              return
  
          # Check if lapack library is complete, only warn if it is not.
          lapack_dir = lapack['library_dirs'][0]
          lapack_name = lapack['libraries'][0]
          lapack_lib = None
          lib_prefixes = ['lib']
          if sys.platform == 'win32':
              lib_prefixes.append('')
          for e in self.library_extensions():
              for prefix in lib_prefixes:
                  fn = os.path.join(lapack_dir, prefix + lapack_name + e)
                  if os.path.exists(fn):
                      lapack_lib = fn
                      break
              if lapack_lib:
                  break
          if lapack_lib is not None:
              sz = os.stat(lapack_lib)[6]
              if sz <= 4000 * 1024:
                  message = textwrap.dedent("""
                      *********************************************************************
                          Lapack library (from ATLAS) is probably incomplete:
                            size of %s is %sk (expected >4000k)
  
                          Follow the instructions in the KNOWN PROBLEMS section of the file
                          numpy/INSTALL.txt.
                      *********************************************************************
                      """) % (lapack_lib, sz / 1024)
                  warnings.warn(message, stacklevel=2)
              else:
                  info['language'] = 'f77'
  
          atlas_version, atlas_extra_info = get_atlas_version(**atlas)
          dict_append(info, **atlas_extra_info)
  
          self.set_info(**info)
  
  
  class atlas_blas_info(atlas_info):
      _lib_names = ['f77blas', 'cblas']
  
      def calc_info(self):
          lib_dirs = self.get_lib_dirs()
          info = {}
          opt = self.get_option_single('atlas_libs', 'libraries')
          atlas_libs = self.get_libs(opt, self._lib_names + self._lib_atlas)
          atlas = self.check_libs2(lib_dirs, atlas_libs, [])
          if atlas is None:
              return
          include_dirs = self.get_include_dirs()
          h = (self.combine_paths(lib_dirs + include_dirs, 'cblas.h') or [None])
          h = h[0]
          if h:
              h = os.path.dirname(h)
              dict_append(info, include_dirs=[h])
          info['language'] = 'c'
          info['define_macros'] = [('HAVE_CBLAS', None)]
  
          atlas_version, atlas_extra_info = get_atlas_version(**atlas)
          dict_append(atlas, **atlas_extra_info)
  
          dict_append(info, **atlas)
  
          self.set_info(**info)
          return
  
  
  class atlas_threads_info(atlas_info):
      dir_env_var = ['PTATLAS', 'ATLAS']
      _lib_names = ['ptf77blas', 'ptcblas']
  
  
  class atlas_blas_threads_info(atlas_blas_info):
      dir_env_var = ['PTATLAS', 'ATLAS']
      _lib_names = ['ptf77blas', 'ptcblas']
  
  
  class lapack_atlas_info(atlas_info):
      _lib_names = ['lapack_atlas'] + atlas_info._lib_names
  
  
  class lapack_atlas_threads_info(atlas_threads_info):
      _lib_names = ['lapack_atlas'] + atlas_threads_info._lib_names
  
  
  class atlas_3_10_info(atlas_info):
      _lib_names = ['satlas']
      _lib_atlas = _lib_names
      _lib_lapack = _lib_names
  
  
  class atlas_3_10_blas_info(atlas_3_10_info):
      _lib_names = ['satlas']
  
      def calc_info(self):
          lib_dirs = self.get_lib_dirs()
          info = {}
          opt = self.get_option_single('atlas_lib', 'libraries')
          atlas_libs = self.get_libs(opt, self._lib_names)
          atlas = self.check_libs2(lib_dirs, atlas_libs, [])
          if atlas is None:
              return
          include_dirs = self.get_include_dirs()
          h = (self.combine_paths(lib_dirs + include_dirs, 'cblas.h') or [None])
          h = h[0]
          if h:
              h = os.path.dirname(h)
              dict_append(info, include_dirs=[h])
          info['language'] = 'c'
          info['define_macros'] = [('HAVE_CBLAS', None)]
  
          atlas_version, atlas_extra_info = get_atlas_version(**atlas)
          dict_append(atlas, **atlas_extra_info)
  
          dict_append(info, **atlas)
  
          self.set_info(**info)
          return
  
  
  class atlas_3_10_threads_info(atlas_3_10_info):
      dir_env_var = ['PTATLAS', 'ATLAS']
      _lib_names = ['tatlas']
      _lib_atlas = _lib_names
      _lib_lapack = _lib_names
  
  
  class atlas_3_10_blas_threads_info(atlas_3_10_blas_info):
      dir_env_var = ['PTATLAS', 'ATLAS']
      _lib_names = ['tatlas']
  
  
  class lapack_atlas_3_10_info(atlas_3_10_info):
      pass
  
  
  class lapack_atlas_3_10_threads_info(atlas_3_10_threads_info):
      pass
  
  
  class lapack_info(system_info):
      section = 'lapack'
      dir_env_var = 'LAPACK'
      _lib_names = ['lapack']
      notfounderror = LapackNotFoundError
  
      def calc_info(self):
          lib_dirs = self.get_lib_dirs()
  
          opt = self.get_option_single('lapack_libs', 'libraries')
          lapack_libs = self.get_libs(opt, self._lib_names)
          info = self.check_libs(lib_dirs, lapack_libs, [])
          if info is None:
              return
          info['language'] = 'f77'
          self.set_info(**info)
  
  
  class lapack_src_info(system_info):
      # LAPACK_SRC is deprecated, please do not use this!
      # Build or install a BLAS library via your package manager or from
      # source separately.
      section = 'lapack_src'
      dir_env_var = 'LAPACK_SRC'
      notfounderror = LapackSrcNotFoundError
  
      def get_paths(self, section, key):
          pre_dirs = system_info.get_paths(self, section, key)
          dirs = []
          for d in pre_dirs:
              dirs.extend([d] + self.combine_paths(d, ['LAPACK*/SRC', 'SRC']))
          return [d for d in dirs if os.path.isdir(d)]
  
      def calc_info(self):
          src_dirs = self.get_src_dirs()
          src_dir = ''
          for d in src_dirs:
              if os.path.isfile(os.path.join(d, 'dgesv.f')):
                  src_dir = d
                  break
          if not src_dir:
              #XXX: Get sources from netlib. May be ask first.
              return
          # The following is extracted from LAPACK-3.0/SRC/Makefile.
          # Added missing names from lapack-lite-3.1.1/SRC/Makefile
          # while keeping removed names for Lapack-3.0 compatibility.
          allaux = '''
          ilaenv ieeeck lsame lsamen xerbla
          iparmq
          '''  # *.f
          laux = '''
          bdsdc bdsqr disna labad lacpy ladiv lae2 laebz laed0 laed1
          laed2 laed3 laed4 laed5 laed6 laed7 laed8 laed9 laeda laev2
          lagtf lagts lamch lamrg lanst lapy2 lapy3 larnv larrb larre
          larrf lartg laruv las2 lascl lasd0 lasd1 lasd2 lasd3 lasd4
          lasd5 lasd6 lasd7 lasd8 lasd9 lasda lasdq lasdt laset lasq1
          lasq2 lasq3 lasq4 lasq5 lasq6 lasr lasrt lassq lasv2 pttrf
          stebz stedc steqr sterf
  
          larra larrc larrd larr larrk larrj larrr laneg laisnan isnan
          lazq3 lazq4
          '''  # [s|d]*.f
          lasrc = '''
          gbbrd gbcon gbequ gbrfs gbsv gbsvx gbtf2 gbtrf gbtrs gebak
          gebal gebd2 gebrd gecon geequ gees geesx geev geevx gegs gegv
          gehd2 gehrd gelq2 gelqf gels gelsd gelss gelsx gelsy geql2
          geqlf geqp3 geqpf geqr2 geqrf gerfs gerq2 gerqf gesc2 gesdd
          gesv gesvd gesvx getc2 getf2 getrf getri getrs ggbak ggbal
          gges ggesx ggev ggevx ggglm gghrd gglse ggqrf ggrqf ggsvd
          ggsvp gtcon gtrfs gtsv gtsvx gttrf gttrs gtts2 hgeqz hsein
          hseqr labrd lacon laein lags2 lagtm lahqr lahrd laic1 lals0
          lalsa lalsd langb lange langt lanhs lansb lansp lansy lantb
          lantp lantr lapll lapmt laqgb laqge laqp2 laqps laqsb laqsp
          laqsy lar1v lar2v larf larfb larfg larft larfx largv larrv
          lartv larz larzb larzt laswp lasyf latbs latdf latps latrd
          latrs latrz latzm lauu2 lauum pbcon pbequ pbrfs pbstf pbsv
          pbsvx pbtf2 pbtrf pbtrs pocon poequ porfs posv posvx potf2
          potrf potri potrs ppcon ppequ pprfs ppsv ppsvx pptrf pptri
          pptrs ptcon pteqr ptrfs ptsv ptsvx pttrs ptts2 spcon sprfs
          spsv spsvx sptrf sptri sptrs stegr stein sycon syrfs sysv
          sysvx sytf2 sytrf sytri sytrs tbcon tbrfs tbtrs tgevc tgex2
          tgexc tgsen tgsja tgsna tgsy2 tgsyl tpcon tprfs tptri tptrs
          trcon trevc trexc trrfs trsen trsna trsyl trti2 trtri trtrs
          tzrqf tzrzf
  
          lacn2 lahr2 stemr laqr0 laqr1 laqr2 laqr3 laqr4 laqr5
          '''  # [s|c|d|z]*.f
          sd_lasrc = '''
          laexc lag2 lagv2 laln2 lanv2 laqtr lasy2 opgtr opmtr org2l
          org2r orgbr orghr orgl2 orglq orgql orgqr orgr2 orgrq orgtr
          orm2l orm2r ormbr ormhr orml2 ormlq ormql ormqr ormr2 ormr3
          ormrq ormrz ormtr rscl sbev sbevd sbevx sbgst sbgv sbgvd sbgvx
          sbtrd spev spevd spevx spgst spgv spgvd spgvx sptrd stev stevd
          stevr stevx syev syevd syevr syevx sygs2 sygst sygv sygvd
          sygvx sytd2 sytrd
          '''  # [s|d]*.f
          cz_lasrc = '''
          bdsqr hbev hbevd hbevx hbgst hbgv hbgvd hbgvx hbtrd hecon heev
          heevd heevr heevx hegs2 hegst hegv hegvd hegvx herfs hesv
          hesvx hetd2 hetf2 hetrd hetrf hetri hetrs hpcon hpev hpevd
          hpevx hpgst hpgv hpgvd hpgvx hprfs hpsv hpsvx hptrd hptrf
          hptri hptrs lacgv lacp2 lacpy lacrm lacrt ladiv laed0 laed7
          laed8 laesy laev2 lahef lanhb lanhe lanhp lanht laqhb laqhe
          laqhp larcm larnv lartg lascl laset lasr lassq pttrf rot spmv
          spr stedc steqr symv syr ung2l ung2r ungbr unghr ungl2 unglq
          ungql ungqr ungr2 ungrq ungtr unm2l unm2r unmbr unmhr unml2
          unmlq unmql unmqr unmr2 unmr3 unmrq unmrz unmtr upgtr upmtr
          '''  # [c|z]*.f
          #######
          sclaux = laux + ' econd '                  # s*.f
          dzlaux = laux + ' secnd '                  # d*.f
          slasrc = lasrc + sd_lasrc                  # s*.f
          dlasrc = lasrc + sd_lasrc                  # d*.f
          clasrc = lasrc + cz_lasrc + ' srot srscl '  # c*.f
          zlasrc = lasrc + cz_lasrc + ' drot drscl '  # z*.f
          oclasrc = ' icmax1 scsum1 '                # *.f
          ozlasrc = ' izmax1 dzsum1 '                # *.f
          sources = ['s%s.f' % f for f in (sclaux + slasrc).split()] \
                    + ['d%s.f' % f for f in (dzlaux + dlasrc).split()] \
                    + ['c%s.f' % f for f in (clasrc).split()] \
                    + ['z%s.f' % f for f in (zlasrc).split()] \
                    + ['%s.f' % f for f in (allaux + oclasrc + ozlasrc).split()]
          sources = [os.path.join(src_dir, f) for f in sources]
          # Lapack 3.1:
          src_dir2 = os.path.join(src_dir, '..', 'INSTALL')
          sources += [os.path.join(src_dir2, p + 'lamch.f') for p in 'sdcz']
          # Lapack 3.2.1:
          sources += [os.path.join(src_dir, p + 'larfp.f') for p in 'sdcz']
          sources += [os.path.join(src_dir, 'ila' + p + 'lr.f') for p in 'sdcz']
          sources += [os.path.join(src_dir, 'ila' + p + 'lc.f') for p in 'sdcz']
          # Should we check here actual existence of source files?
          # Yes, the file listing is different between 3.0 and 3.1
          # versions.
          sources = [f for f in sources if os.path.isfile(f)]
          info = {'sources': sources, 'language': 'f77'}
          self.set_info(**info)
  
  atlas_version_c_text = r'''
  /* This file is generated from numpy/distutils/system_info.py */
  void ATL_buildinfo(void);
  int main(void) {
    ATL_buildinfo();
    return 0;
  }
  '''
  
  _cached_atlas_version = {}
  
  
  def get_atlas_version(**config):
      libraries = config.get('libraries', [])
      library_dirs = config.get('library_dirs', [])
      key = (tuple(libraries), tuple(library_dirs))
      if key in _cached_atlas_version:
          return _cached_atlas_version[key]
      c = cmd_config(Distribution())
      atlas_version = None
      info = {}
      try:
          s, o = c.get_output(atlas_version_c_text,
                              libraries=libraries, library_dirs=library_dirs,
                             )
          if s and re.search(r'undefined reference to `_gfortran', o, re.M):
              s, o = c.get_output(atlas_version_c_text,
                                  libraries=libraries + ['gfortran'],
                                  library_dirs=library_dirs,
                                 )
              if not s:
                  warnings.warn(textwrap.dedent("""
                      *****************************************************
                      Linkage with ATLAS requires gfortran. Use
  
                        python setup.py config_fc --fcompiler=gnu95 ...
  
                      when building extension libraries that use ATLAS.
                      Make sure that -lgfortran is used for C++ extensions.
                      *****************************************************
                      """), stacklevel=2)
                  dict_append(info, language='f90',
                              define_macros=[('ATLAS_REQUIRES_GFORTRAN', None)])
      except Exception:  # failed to get version from file -- maybe on Windows
          # look at directory name
          for o in library_dirs:
              m = re.search(r'ATLAS_(?P<version>\d+[.]\d+[.]\d+)_', o)
              if m:
                  atlas_version = m.group('version')
              if atlas_version is not None:
                  break
  
          # final choice --- look at ATLAS_VERSION environment
          #   variable
          if atlas_version is None:
              atlas_version = os.environ.get('ATLAS_VERSION', None)
          if atlas_version:
              dict_append(info, define_macros=[(
                  'ATLAS_INFO', _c_string_literal(atlas_version))
              ])
          else:
              dict_append(info, define_macros=[('NO_ATLAS_INFO', -1)])
          return atlas_version or '?.?.?', info
  
      if not s:
          m = re.search(r'ATLAS version (?P<version>\d+[.]\d+[.]\d+)', o)
          if m:
              atlas_version = m.group('version')
      if atlas_version is None:
          if re.search(r'undefined symbol: ATL_buildinfo', o, re.M):
              atlas_version = '3.2.1_pre3.3.6'
          else:
              log.info('Status: %d', s)
              log.info('Output: %s', o)
  
      elif atlas_version == '3.2.1_pre3.3.6':
          dict_append(info, define_macros=[('NO_ATLAS_INFO', -2)])
      else:
          dict_append(info, define_macros=[(
              'ATLAS_INFO', _c_string_literal(atlas_version))
          ])
      result = _cached_atlas_version[key] = atlas_version, info
      return result
  
  
  class lapack_opt_info(system_info):
      notfounderror = LapackNotFoundError
  
      # List of all known LAPACK libraries, in the default order
      lapack_order = ['mkl', 'openblas', 'flame',
                      'accelerate', 'atlas', 'lapack']
      order_env_var_name = 'NPY_LAPACK_ORDER'
  
      def _calc_info_mkl(self):
          info = get_info('lapack_mkl')
          if info:
              self.set_info(**info)
              return True
          return False
  
      def _calc_info_openblas(self):
          info = get_info('openblas_lapack')
          if info:
              self.set_info(**info)
              return True
          info = get_info('openblas_clapack')
          if info:
              self.set_info(**info)
              return True
          return False
  
      def _calc_info_flame(self):
          info = get_info('flame')
          if info:
              self.set_info(**info)
              return True
          return False
  
      def _calc_info_atlas(self):
          info = get_info('atlas_3_10_threads')
          if not info:
              info = get_info('atlas_3_10')
          if not info:
              info = get_info('atlas_threads')
          if not info:
              info = get_info('atlas')
          if info:
              # Figure out if ATLAS has lapack...
              # If not we need the lapack library, but not BLAS!
              l = info.get('define_macros', [])
              if ('ATLAS_WITH_LAPACK_ATLAS', None) in l \
                 or ('ATLAS_WITHOUT_LAPACK', None) in l:
                  # Get LAPACK (with possible warnings)
                  # If not found we don't accept anything
                  # since we can't use ATLAS with LAPACK!
                  lapack_info = self._get_info_lapack()
                  if not lapack_info:
                      return False
                  dict_append(info, **lapack_info)
              self.set_info(**info)
              return True
          return False
  
      def _calc_info_accelerate(self):
          info = get_info('accelerate')
          if info:
              self.set_info(**info)
              return True
          return False
  
      def _get_info_blas(self):
          # Default to get the optimized BLAS implementation
          info = get_info('blas_opt')
          if not info:
              warnings.warn(BlasNotFoundError.__doc__ or '', stacklevel=3)
              info_src = get_info('blas_src')
              if not info_src:
                  warnings.warn(BlasSrcNotFoundError.__doc__ or '', stacklevel=3)
                  return {}
              dict_append(info, libraries=[('fblas_src', info_src)])
          return info
  
      def _get_info_lapack(self):
          info = get_info('lapack')
          if not info:
              warnings.warn(LapackNotFoundError.__doc__ or '', stacklevel=3)
              info_src = get_info('lapack_src')
              if not info_src:
                  warnings.warn(LapackSrcNotFoundError.__doc__ or '', stacklevel=3)
                  return {}
              dict_append(info, libraries=[('flapack_src', info_src)])
          return info
  
      def _calc_info_lapack(self):
          info = self._get_info_lapack()
          if info:
              info_blas = self._get_info_blas()
              dict_append(info, **info_blas)
              dict_append(info, define_macros=[('NO_ATLAS_INFO', 1)])
              self.set_info(**info)
              return True
          return False
  
      def _calc_info_from_envvar(self):
          info = {}
          info['language'] = 'f77'
          info['libraries'] = []
          info['include_dirs'] = []
          info['define_macros'] = []
          info['extra_link_args'] = os.environ['NPY_LAPACK_LIBS'].split()
          self.set_info(**info)
          return True
  
      def _calc_info(self, name):
          return getattr(self, '_calc_info_{}'.format(name))()
  
      def calc_info(self):
          lapack_order, unknown_order = _parse_env_order(self.lapack_order, self.order_env_var_name)
          if len(unknown_order) > 0:
              raise ValueError("lapack_opt_info user defined "
                               "LAPACK order has unacceptable "
                               "values: {}".format(unknown_order))
  
          if 'NPY_LAPACK_LIBS' in os.environ:
              # Bypass autodetection, set language to F77 and use env var linker
              # flags directly
              self._calc_info_from_envvar()
              return
  
          for lapack in lapack_order:
              if self._calc_info(lapack):
                  return
  
          if 'lapack' not in lapack_order:
              # Since the user may request *not* to use any library, we still need
              # to raise warnings to signal missing packages!
              warnings.warn(LapackNotFoundError.__doc__ or '', stacklevel=2)
              warnings.warn(LapackSrcNotFoundError.__doc__ or '', stacklevel=2)
  
  
  class _ilp64_opt_info_mixin:
      symbol_suffix = None
      symbol_prefix = None
  
      def _check_info(self, info):
          macros = dict(info.get('define_macros', []))
          prefix = macros.get('BLAS_SYMBOL_PREFIX', '')
          suffix = macros.get('BLAS_SYMBOL_SUFFIX', '')
  
          if self.symbol_prefix not in (None, prefix):
              return False
  
          if self.symbol_suffix not in (None, suffix):
              return False
  
          return bool(info)
  
  
  class lapack_ilp64_opt_info(lapack_opt_info, _ilp64_opt_info_mixin):
      notfounderror = LapackILP64NotFoundError
      lapack_order = ['openblas64_', 'openblas_ilp64']
      order_env_var_name = 'NPY_LAPACK_ILP64_ORDER'
  
      def _calc_info(self, name):
          info = get_info(name + '_lapack')
          if self._check_info(info):
              self.set_info(**info)
              return True
          return False
  
  
  class lapack_ilp64_plain_opt_info(lapack_ilp64_opt_info):
      # Same as lapack_ilp64_opt_info, but fix symbol names
      symbol_prefix = ''
      symbol_suffix = ''
  
  
  class lapack64__opt_info(lapack_ilp64_opt_info):
      symbol_prefix = ''
      symbol_suffix = '64_'
  
  
  class blas_opt_info(system_info):
      notfounderror = BlasNotFoundError
      # List of all known BLAS libraries, in the default order
  
      blas_order = ['mkl', 'blis', 'openblas',
                    'accelerate', 'atlas', 'blas']
      order_env_var_name = 'NPY_BLAS_ORDER'
  
      def _calc_info_mkl(self):
          info = get_info('blas_mkl')
          if info:
              self.set_info(**info)
              return True
          return False
  
      def _calc_info_blis(self):
          info = get_info('blis')
          if info:
              self.set_info(**info)
              return True
          return False
  
      def _calc_info_openblas(self):
          info = get_info('openblas')
          if info:
              self.set_info(**info)
              return True
          return False
  
      def _calc_info_atlas(self):
          info = get_info('atlas_3_10_blas_threads')
          if not info:
              info = get_info('atlas_3_10_blas')
          if not info:
              info = get_info('atlas_blas_threads')
          if not info:
              info = get_info('atlas_blas')
          if info:
              self.set_info(**info)
              return True
          return False
  
      def _calc_info_accelerate(self):
          info = get_info('accelerate')
          if info:
              self.set_info(**info)
              return True
          return False
  
      def _calc_info_blas(self):
          # Warn about a non-optimized BLAS library
          warnings.warn(BlasOptNotFoundError.__doc__ or '', stacklevel=3)
          info = {}
          dict_append(info, define_macros=[('NO_ATLAS_INFO', 1)])
  
          blas = get_info('blas')
          if blas:
              dict_append(info, **blas)
          else:
              # Not even BLAS was found!
              warnings.warn(BlasNotFoundError.__doc__ or '', stacklevel=3)
  
              blas_src = get_info('blas_src')
              if not blas_src:
                  warnings.warn(BlasSrcNotFoundError.__doc__ or '', stacklevel=3)
                  return False
              dict_append(info, libraries=[('fblas_src', blas_src)])
  
          self.set_info(**info)
          return True
  
      def _calc_info_from_envvar(self):
          info = {}
          info['language'] = 'f77'
          info['libraries'] = []
          info['include_dirs'] = []
          info['define_macros'] = []
          info['extra_link_args'] = os.environ['NPY_BLAS_LIBS'].split()
          if 'NPY_CBLAS_LIBS' in os.environ:
              info['define_macros'].append(('HAVE_CBLAS', None))
              info['extra_link_args'].extend(
                                          os.environ['NPY_CBLAS_LIBS'].split())
          self.set_info(**info)
          return True
  
      def _calc_info(self, name):
          return getattr(self, '_calc_info_{}'.format(name))()
  
      def calc_info(self):
          blas_order, unknown_order = _parse_env_order(self.blas_order, self.order_env_var_name)
          if len(unknown_order) > 0:
              raise ValueError("blas_opt_info user defined BLAS order has unacceptable values: {}".format(unknown_order))
  
          if 'NPY_BLAS_LIBS' in os.environ:
              # Bypass autodetection, set language to F77 and use env var linker
              # flags directly
              self._calc_info_from_envvar()
              return
  
          for blas in blas_order:
              if self._calc_info(blas):
                  return
  
          if 'blas' not in blas_order:
              # Since the user may request *not* to use any library, we still need
              # to raise warnings to signal missing packages!
              warnings.warn(BlasNotFoundError.__doc__ or '', stacklevel=2)
              warnings.warn(BlasSrcNotFoundError.__doc__ or '', stacklevel=2)
  
  
  class blas_ilp64_opt_info(blas_opt_info, _ilp64_opt_info_mixin):
      notfounderror = BlasILP64NotFoundError
      blas_order = ['openblas64_', 'openblas_ilp64']
      order_env_var_name = 'NPY_BLAS_ILP64_ORDER'
  
      def _calc_info(self, name):
          info = get_info(name)
          if self._check_info(info):
              self.set_info(**info)
              return True
          return False
  
  
  class blas_ilp64_plain_opt_info(blas_ilp64_opt_info):
      symbol_prefix = ''
      symbol_suffix = ''
  
  
  class blas64__opt_info(blas_ilp64_opt_info):
      symbol_prefix = ''
      symbol_suffix = '64_'
  
  
  class cblas_info(system_info):
      section = 'cblas'
      dir_env_var = 'CBLAS'
      # No default as it's used only in blas_info
      _lib_names = []
      notfounderror = BlasNotFoundError
  
  
  class blas_info(system_info):
      section = 'blas'
      dir_env_var = 'BLAS'
      _lib_names = ['blas']
      notfounderror = BlasNotFoundError
  
      def calc_info(self):
          lib_dirs = self.get_lib_dirs()
          opt = self.get_option_single('blas_libs', 'libraries')
          blas_libs = self.get_libs(opt, self._lib_names)
          info = self.check_libs(lib_dirs, blas_libs, [])
          if info is None:
              return
          else:
              info['include_dirs'] = self.get_include_dirs()
          if platform.system() == 'Windows':
              # The check for windows is needed because get_cblas_libs uses the
              # same compiler that was used to compile Python and msvc is
              # often not installed when mingw is being used. This rough
              # treatment is not desirable, but windows is tricky.
              info['language'] = 'f77'  # XXX: is it generally true?
              # If cblas is given as an option, use those
              cblas_info_obj = cblas_info()
              cblas_opt = cblas_info_obj.get_option_single('cblas_libs', 'libraries')
              cblas_libs = cblas_info_obj.get_libs(cblas_opt, None)
              if cblas_libs:
                  info['libraries'] = cblas_libs + blas_libs
                  info['define_macros'] = [('HAVE_CBLAS', None)]
          else:
              lib = self.get_cblas_libs(info)
              if lib is not None:
                  info['language'] = 'c'
                  info['libraries'] = lib
                  info['define_macros'] = [('HAVE_CBLAS', None)]
          self.set_info(**info)
  
      def get_cblas_libs(self, info):
          """ Check whether we can link with CBLAS interface
  
          This method will search through several combinations of libraries
          to check whether CBLAS is present:
  
          1. Libraries in ``info['libraries']``, as is
          2. As 1. but also explicitly adding ``'cblas'`` as a library
          3. As 1. but also explicitly adding ``'blas'`` as a library
          4. Check only library ``'cblas'``
          5. Check only library ``'blas'``
  
          Parameters
          ----------
          info : dict
             system information dictionary for compilation and linking
  
          Returns
          -------
          libraries : list of str or None
              a list of libraries that enables the use of CBLAS interface.
              Returns None if not found or a compilation error occurs.
  
              Since 1.17 returns a list.
          """
          # primitive cblas check by looking for the header and trying to link
          # cblas or blas
          c = customized_ccompiler()
          tmpdir = tempfile.mkdtemp()
          s = textwrap.dedent("""\
              #include <cblas.h>
              int main(int argc, const char *argv[])
              {
                  double a[4] = {1,2,3,4};
                  double b[4] = {5,6,7,8};
                  return cblas_ddot(4, a, 1, b, 1) > 10;
              }""")
          src = os.path.join(tmpdir, 'source.c')
          try:
              with open(src, 'wt') as f:
                  f.write(s)
  
              try:
                  # check we can compile (find headers)
                  obj = c.compile([src], output_dir=tmpdir,
                                  include_dirs=self.get_include_dirs())
              except (distutils.ccompiler.CompileError, distutils.ccompiler.LinkError):
                  return None
  
              # check we can link (find library)
              # some systems have separate cblas and blas libs.
              for libs in [info['libraries'], ['cblas'] + info['libraries'],
                           ['blas'] + info['libraries'], ['cblas'], ['blas']]:
                  try:
                      c.link_executable(obj, os.path.join(tmpdir, "a.out"),
                                        libraries=libs,
                                        library_dirs=info['library_dirs'],
                                        extra_postargs=info.get('extra_link_args', []))
                      return libs
                  except distutils.ccompiler.LinkError:
                      pass
          finally:
              shutil.rmtree(tmpdir)
          return None
  
  
  class openblas_info(blas_info):
      section = 'openblas'
      dir_env_var = 'OPENBLAS'
      _lib_names = ['openblas']
      _require_symbols = []
      notfounderror = BlasNotFoundError
  
      @property
      def symbol_prefix(self):
          try:
              return self.cp.get(self.section, 'symbol_prefix')
          except NoOptionError:
              return ''
  
      @property
      def symbol_suffix(self):
          try:
              return self.cp.get(self.section, 'symbol_suffix')
          except NoOptionError:
              return ''
  
      def _calc_info(self):
          c = customized_ccompiler()
  
          lib_dirs = self.get_lib_dirs()
  
          # Prefer to use libraries over openblas_libs
          opt = self.get_option_single('openblas_libs', 'libraries')
          openblas_libs = self.get_libs(opt, self._lib_names)
  
          info = self.check_libs(lib_dirs, openblas_libs, [])
  
          if c.compiler_type == "msvc" and info is None:
              from numpy.distutils.fcompiler import new_fcompiler
              f = new_fcompiler(c_compiler=c)
              if f and f.compiler_type == 'gnu95':
                  # Try gfortran-compatible library files
                  info = self.check_msvc_gfortran_libs(lib_dirs, openblas_libs)
                  # Skip lapack check, we'd need build_ext to do it
                  skip_symbol_check = True
          elif info:
              skip_symbol_check = False
              info['language'] = 'c'
  
          if info is None:
              return None
  
          # Add extra info for OpenBLAS
          extra_info = self.calc_extra_info()
          dict_append(info, **extra_info)
  
          if not (skip_symbol_check or self.check_symbols(info)):
              return None
  
          info['define_macros'] = [('HAVE_CBLAS', None)]
          if self.symbol_prefix:
              info['define_macros'] += [('BLAS_SYMBOL_PREFIX', self.symbol_prefix)]
          if self.symbol_suffix:
              info['define_macros'] += [('BLAS_SYMBOL_SUFFIX', self.symbol_suffix)]
  
          return info
  
      def calc_info(self):
          info = self._calc_info()
          if info is not None:
              self.set_info(**info)
  
      def check_msvc_gfortran_libs(self, library_dirs, libraries):
          # First, find the full path to each library directory
          library_paths = []
          for library in libraries:
              for library_dir in library_dirs:
                  # MinGW static ext will be .a
                  fullpath = os.path.join(library_dir, library + '.a')
                  if os.path.isfile(fullpath):
                      library_paths.append(fullpath)
                      break
              else:
                  return None
  
          # Generate numpy.distutils virtual static library file
          basename = self.__class__.__name__
          tmpdir = os.path.join(os.getcwd(), 'build', basename)
          if not os.path.isdir(tmpdir):
              os.makedirs(tmpdir)
  
          info = {'library_dirs': [tmpdir],
                  'libraries': [basename],
                  'language': 'f77'}
  
          fake_lib_file = os.path.join(tmpdir, basename + '.fobjects')
          fake_clib_file = os.path.join(tmpdir, basename + '.cobjects')
          with open(fake_lib_file, 'w') as f:
              f.write("\n".join(library_paths))
          with open(fake_clib_file, 'w') as f:
              pass
  
          return info
  
      def check_symbols(self, info):
          res = False
          c = customized_ccompiler()
  
          tmpdir = tempfile.mkdtemp()
  
          prototypes = "\n".join("void %s%s%s();" % (self.symbol_prefix,
                                                     symbol_name,
                                                     self.symbol_suffix)
                                 for symbol_name in self._require_symbols)
          calls = "\n".join("%s%s%s();" % (self.symbol_prefix,
                                           symbol_name,
                                           self.symbol_suffix)
                            for symbol_name in self._require_symbols)
          s = textwrap.dedent("""\
              %(prototypes)s
              int main(int argc, const char *argv[])
              {
                  %(calls)s
                  return 0;
              }""") % dict(prototypes=prototypes, calls=calls)
          src = os.path.join(tmpdir, 'source.c')
          out = os.path.join(tmpdir, 'a.out')
          # Add the additional "extra" arguments
          try:
              extra_args = info['extra_link_args']
          except Exception:
              extra_args = []
          try:
              with open(src, 'wt') as f:
                  f.write(s)
              obj = c.compile([src], output_dir=tmpdir)
              try:
                  c.link_executable(obj, out, libraries=info['libraries'],
                                    library_dirs=info['library_dirs'],
                                    extra_postargs=extra_args)
                  res = True
              except distutils.ccompiler.LinkError:
                  res = False
          finally:
              shutil.rmtree(tmpdir)
          return res
  
  class openblas_lapack_info(openblas_info):
      section = 'openblas'
      dir_env_var = 'OPENBLAS'
      _lib_names = ['openblas']
      _require_symbols = ['zungqr_']
      notfounderror = BlasNotFoundError
  
  class openblas_clapack_info(openblas_lapack_info):
      _lib_names = ['openblas', 'lapack']
  
  class openblas_ilp64_info(openblas_info):
      section = 'openblas_ilp64'
      dir_env_var = 'OPENBLAS_ILP64'
      _lib_names = ['openblas64']
      _require_symbols = ['dgemm_', 'cblas_dgemm']
      notfounderror = BlasILP64NotFoundError
  
      def _calc_info(self):
          info = super()._calc_info()
          if info is not None:
              info['define_macros'] += [('HAVE_BLAS_ILP64', None)]
          return info
  
  class openblas_ilp64_lapack_info(openblas_ilp64_info):
      _require_symbols = ['dgemm_', 'cblas_dgemm', 'zungqr_', 'LAPACKE_zungqr']
  
      def _calc_info(self):
          info = super()._calc_info()
          if info:
              info['define_macros'] += [('HAVE_LAPACKE', None)]
          return info
  
  class openblas64__info(openblas_ilp64_info):
      # ILP64 Openblas, with default symbol suffix
      section = 'openblas64_'
      dir_env_var = 'OPENBLAS64_'
      _lib_names = ['openblas64_']
      symbol_suffix = '64_'
      symbol_prefix = ''
  
  class openblas64__lapack_info(openblas_ilp64_lapack_info, openblas64__info):
      pass
  
  class blis_info(blas_info):
      section = 'blis'
      dir_env_var = 'BLIS'
      _lib_names = ['blis']
      notfounderror = BlasNotFoundError
  
      def calc_info(self):
          lib_dirs = self.get_lib_dirs()
          opt = self.get_option_single('blis_libs', 'libraries')
          blis_libs = self.get_libs(opt, self._lib_names)
          info = self.check_libs2(lib_dirs, blis_libs, [])
          if info is None:
              return
  
          # Add include dirs
          incl_dirs = self.get_include_dirs()
          dict_append(info,
                      language='c',
                      define_macros=[('HAVE_CBLAS', None)],
                      include_dirs=incl_dirs)
          self.set_info(**info)
  
  
  class flame_info(system_info):
      """ Usage of libflame for LAPACK operations
  
      This requires libflame to be compiled with lapack wrappers:
  
      ./configure --enable-lapack2flame ...
  
      Be aware that libflame 5.1.0 has some missing names in the shared library, so
      if you have problems, try the static flame library.
      """
      section = 'flame'
      _lib_names = ['flame']
      notfounderror = FlameNotFoundError
  
      def check_embedded_lapack(self, info):
          """ libflame does not necessarily have a wrapper for fortran LAPACK, we need to check """
          c = customized_ccompiler()
  
          tmpdir = tempfile.mkdtemp()
          s = textwrap.dedent("""\
              void zungqr_();
              int main(int argc, const char *argv[])
              {
                  zungqr_();
                  return 0;
              }""")
          src = os.path.join(tmpdir, 'source.c')
          out = os.path.join(tmpdir, 'a.out')
          # Add the additional "extra" arguments
          extra_args = info.get('extra_link_args', [])
          try:
              with open(src, 'wt') as f:
                  f.write(s)
              obj = c.compile([src], output_dir=tmpdir)
              try:
                  c.link_executable(obj, out, libraries=info['libraries'],
                                    library_dirs=info['library_dirs'],
                                    extra_postargs=extra_args)
                  return True
              except distutils.ccompiler.LinkError:
                  return False
          finally:
              shutil.rmtree(tmpdir)
  
      def calc_info(self):
          lib_dirs = self.get_lib_dirs()
          flame_libs = self.get_libs('libraries', self._lib_names)
  
          info = self.check_libs2(lib_dirs, flame_libs, [])
          if info is None:
              return
  
          # Add the extra flag args to info
          extra_info = self.calc_extra_info()
          dict_append(info, **extra_info)
  
          if self.check_embedded_lapack(info):
              # check if the user has supplied all information required
              self.set_info(**info)
          else:
              # Try and get the BLAS lib to see if we can get it to work
              blas_info = get_info('blas_opt')
              if not blas_info:
                  # since we already failed once, this ain't going to work either
                  return
  
              # Now we need to merge the two dictionaries
              for key in blas_info:
                  if isinstance(blas_info[key], list):
                      info[key] = info.get(key, []) + blas_info[key]
                  elif isinstance(blas_info[key], tuple):
                      info[key] = info.get(key, ()) + blas_info[key]
                  else:
                      info[key] = info.get(key, '') + blas_info[key]
  
              # Now check again
              if self.check_embedded_lapack(info):
                  self.set_info(**info)
  
  
  class accelerate_info(system_info):
      section = 'accelerate'
      _lib_names = ['accelerate', 'veclib']
      notfounderror = BlasNotFoundError
  
      def calc_info(self):
          # Make possible to enable/disable from config file/env var
          libraries = os.environ.get('ACCELERATE')
          if libraries:
              libraries = [libraries]
          else:
              libraries = self.get_libs('libraries', self._lib_names)
          libraries = [lib.strip().lower() for lib in libraries]
  
          if (sys.platform == 'darwin' and
                  not os.getenv('_PYTHON_HOST_PLATFORM', None)):
              # Use the system BLAS from Accelerate or vecLib under OSX
              args = []
              link_args = []
              if get_platform()[-4:] == 'i386' or 'intel' in get_platform() or \
                 'x86_64' in get_platform() or \
                 'i386' in platform.platform():
                  intel = 1
              else:
                  intel = 0
              if (os.path.exists('/System/Library/Frameworks'
                                '/Accelerate.framework/') and
                      'accelerate' in libraries):
                  if intel:
                      args.extend(['-msse3'])
                  args.extend([
                      '-I/System/Library/Frameworks/vecLib.framework/Headers'])
                  link_args.extend(['-Wl,-framework', '-Wl,Accelerate'])
              elif (os.path.exists('/System/Library/Frameworks'
                                   '/vecLib.framework/') and
                        'veclib' in libraries):
                  if intel:
                      args.extend(['-msse3'])
                  args.extend([
                      '-I/System/Library/Frameworks/vecLib.framework/Headers'])
                  link_args.extend(['-Wl,-framework', '-Wl,vecLib'])
  
              if args:
                  self.set_info(extra_compile_args=args,
                                extra_link_args=link_args,
                                define_macros=[('NO_ATLAS_INFO', 3),
                                               ('HAVE_CBLAS', None)])
  
          return
  
  class blas_src_info(system_info):
      # BLAS_SRC is deprecated, please do not use this!
      # Build or install a BLAS library via your package manager or from
      # source separately.
      section = 'blas_src'
      dir_env_var = 'BLAS_SRC'
      notfounderror = BlasSrcNotFoundError
  
      def get_paths(self, section, key):
          pre_dirs = system_info.get_paths(self, section, key)
          dirs = []
          for d in pre_dirs:
              dirs.extend([d] + self.combine_paths(d, ['blas']))
          return [d for d in dirs if os.path.isdir(d)]
  
      def calc_info(self):
          src_dirs = self.get_src_dirs()
          src_dir = ''
          for d in src_dirs:
              if os.path.isfile(os.path.join(d, 'daxpy.f')):
                  src_dir = d
                  break
          if not src_dir:
              #XXX: Get sources from netlib. May be ask first.
              return
          blas1 = '''
          caxpy csscal dnrm2 dzasum saxpy srotg zdotc ccopy cswap drot
          dznrm2 scasum srotm zdotu cdotc dasum drotg icamax scnrm2
          srotmg zdrot cdotu daxpy drotm idamax scopy sscal zdscal crotg
          dcabs1 drotmg isamax sdot sswap zrotg cscal dcopy dscal izamax
          snrm2 zaxpy zscal csrot ddot dswap sasum srot zcopy zswap
          scabs1
          '''
          blas2 = '''
          cgbmv chpmv ctrsv dsymv dtrsv sspr2 strmv zhemv ztpmv cgemv
          chpr dgbmv dsyr lsame ssymv strsv zher ztpsv cgerc chpr2 dgemv
          dsyr2 sgbmv ssyr xerbla zher2 ztrmv cgeru ctbmv dger dtbmv
          sgemv ssyr2 zgbmv zhpmv ztrsv chbmv ctbsv dsbmv dtbsv sger
          stbmv zgemv zhpr chemv ctpmv dspmv dtpmv ssbmv stbsv zgerc
          zhpr2 cher ctpsv dspr dtpsv sspmv stpmv zgeru ztbmv cher2
          ctrmv dspr2 dtrmv sspr stpsv zhbmv ztbsv
          '''
          blas3 = '''
          cgemm csymm ctrsm dsyrk sgemm strmm zhemm zsyr2k chemm csyr2k
          dgemm dtrmm ssymm strsm zher2k zsyrk cher2k csyrk dsymm dtrsm
          ssyr2k zherk ztrmm cherk ctrmm dsyr2k ssyrk zgemm zsymm ztrsm
          '''
          sources = [os.path.join(src_dir, f + '.f') \
                     for f in (blas1 + blas2 + blas3).split()]
          #XXX: should we check here actual existence of source files?
          sources = [f for f in sources if os.path.isfile(f)]
          info = {'sources': sources, 'language': 'f77'}
          self.set_info(**info)
  
  
  class x11_info(system_info):
      section = 'x11'
      notfounderror = X11NotFoundError
      _lib_names = ['X11']
  
      def __init__(self):
          system_info.__init__(self,
                               default_lib_dirs=default_x11_lib_dirs,
                               default_include_dirs=default_x11_include_dirs)
  
      def calc_info(self):
          if sys.platform  in ['win32']:
              return
          lib_dirs = self.get_lib_dirs()
          include_dirs = self.get_include_dirs()
          opt = self.get_option_single('x11_libs', 'libraries')
          x11_libs = self.get_libs(opt, self._lib_names)
          info = self.check_libs(lib_dirs, x11_libs, [])
          if info is None:
              return
          inc_dir = None
          for d in include_dirs:
              if self.combine_paths(d, 'X11/X.h'):
                  inc_dir = d
                  break
          if inc_dir is not None:
              dict_append(info, include_dirs=[inc_dir])
          self.set_info(**info)
  
  
  class _numpy_info(system_info):
      section = 'Numeric'
      modulename = 'Numeric'
      notfounderror = NumericNotFoundError
  
      def __init__(self):
          include_dirs = []
          try:
              module = __import__(self.modulename)
              prefix = []
              for name in module.__file__.split(os.sep):
                  if name == 'lib':
                      break
                  prefix.append(name)
  
              # Ask numpy for its own include path before attempting
              # anything else
              try:
                  include_dirs.append(getattr(module, 'get_include')())
              except AttributeError:
                  pass
  
              include_dirs.append(sysconfig.get_path('include'))
          except ImportError:
              pass
          py_incl_dir = sysconfig.get_path('include')
          include_dirs.append(py_incl_dir)
          py_pincl_dir = sysconfig.get_path('platinclude')
          if py_pincl_dir not in include_dirs:
              include_dirs.append(py_pincl_dir)
          for d in default_include_dirs:
              d = os.path.join(d, os.path.basename(py_incl_dir))
              if d not in include_dirs:
                  include_dirs.append(d)
          system_info.__init__(self,
                               default_lib_dirs=[],
                               default_include_dirs=include_dirs)
  
      def calc_info(self):
          try:
              module = __import__(self.modulename)
          except ImportError:
              return
          info = {}
          macros = []
          for v in ['__version__', 'version']:
              vrs = getattr(module, v, None)
              if vrs is None:
                  continue
              macros = [(self.modulename.upper() + '_VERSION',
                        _c_string_literal(vrs)),
                        (self.modulename.upper(), None)]
              break
          dict_append(info, define_macros=macros)
          include_dirs = self.get_include_dirs()
          inc_dir = None
          for d in include_dirs:
              if self.combine_paths(d,
                                    os.path.join(self.modulename,
                                                 'arrayobject.h')):
                  inc_dir = d
                  break
          if inc_dir is not None:
              dict_append(info, include_dirs=[inc_dir])
          if info:
              self.set_info(**info)
          return
  
  
  class numarray_info(_numpy_info):
      section = 'numarray'
      modulename = 'numarray'
  
  
  class Numeric_info(_numpy_info):
      section = 'Numeric'
      modulename = 'Numeric'
  
  
  class numpy_info(_numpy_info):
      section = 'numpy'
      modulename = 'numpy'
  
  
  class numerix_info(system_info):
      section = 'numerix'
  
      def calc_info(self):
          which = None, None
          if os.getenv("NUMERIX"):
              which = os.getenv("NUMERIX"), "environment var"
          # If all the above fail, default to numpy.
          if which[0] is None:
              which = "numpy", "defaulted"
              try:
                  import numpy  # noqa: F401
                  which = "numpy", "defaulted"
              except ImportError as e:
                  msg1 = str(e)
                  try:
                      import Numeric  # noqa: F401
                      which = "numeric", "defaulted"
                  except ImportError as e:
                      msg2 = str(e)
                      try:
                          import numarray  # noqa: F401
                          which = "numarray", "defaulted"
                      except ImportError as e:
                          msg3 = str(e)
                          log.info(msg1)
                          log.info(msg2)
                          log.info(msg3)
          which = which[0].strip().lower(), which[1]
          if which[0] not in ["numeric", "numarray", "numpy"]:
              raise ValueError("numerix selector must be either 'Numeric' "
                               "or 'numarray' or 'numpy' but the value obtained"
                               " from the %s was '%s'." % (which[1], which[0]))
          os.environ['NUMERIX'] = which[0]
          self.set_info(**get_info(which[0]))
  
  
  class f2py_info(system_info):
      def calc_info(self):
          try:
              import numpy.f2py as f2py
          except ImportError:
              return
          f2py_dir = os.path.join(os.path.dirname(f2py.__file__), 'src')
          self.set_info(sources=[os.path.join(f2py_dir, 'fortranobject.c')],
                        include_dirs=[f2py_dir])
          return
  
  
  class boost_python_info(system_info):
      section = 'boost_python'
      dir_env_var = 'BOOST'
  
      def get_paths(self, section, key):
          pre_dirs = system_info.get_paths(self, section, key)
          dirs = []
          for d in pre_dirs:
              dirs.extend([d] + self.combine_paths(d, ['boost*']))
          return [d for d in dirs if os.path.isdir(d)]
  
      def calc_info(self):
          src_dirs = self.get_src_dirs()
          src_dir = ''
          for d in src_dirs:
              if os.path.isfile(os.path.join(d, 'libs', 'python', 'src',
                                             'module.cpp')):
                  src_dir = d
                  break
          if not src_dir:
              return
          py_incl_dirs = [sysconfig.get_path('include')]
          py_pincl_dir = sysconfig.get_path('platinclude')
          if py_pincl_dir not in py_incl_dirs:
              py_incl_dirs.append(py_pincl_dir)
          srcs_dir = os.path.join(src_dir, 'libs', 'python', 'src')
          bpl_srcs = glob(os.path.join(srcs_dir, '*.cpp'))
          bpl_srcs += glob(os.path.join(srcs_dir, '*', '*.cpp'))
          info = {'libraries': [('boost_python_src',
                                 {'include_dirs': [src_dir] + py_incl_dirs,
                                  'sources':bpl_srcs}
                                )],
                  'include_dirs': [src_dir],
                  }
          if info:
              self.set_info(**info)
          return
  
  
  class agg2_info(system_info):
      section = 'agg2'
      dir_env_var = 'AGG2'
  
      def get_paths(self, section, key):
          pre_dirs = system_info.get_paths(self, section, key)
          dirs = []
          for d in pre_dirs:
              dirs.extend([d] + self.combine_paths(d, ['agg2*']))
          return [d for d in dirs if os.path.isdir(d)]
  
      def calc_info(self):
          src_dirs = self.get_src_dirs()
          src_dir = ''
          for d in src_dirs:
              if os.path.isfile(os.path.join(d, 'src', 'agg_affine_matrix.cpp')):
                  src_dir = d
                  break
          if not src_dir:
              return
          if sys.platform == 'win32':
              agg2_srcs = glob(os.path.join(src_dir, 'src', 'platform',
                                            'win32', 'agg_win32_bmp.cpp'))
          else:
              agg2_srcs = glob(os.path.join(src_dir, 'src', '*.cpp'))
              agg2_srcs += [os.path.join(src_dir, 'src', 'platform',
                                         'X11',
                                         'agg_platform_support.cpp')]
  
          info = {'libraries':
                  [('agg2_src',
                    {'sources': agg2_srcs,
                     'include_dirs': [os.path.join(src_dir, 'include')],
                    }
                   )],
                  'include_dirs': [os.path.join(src_dir, 'include')],
                  }
          if info:
              self.set_info(**info)
          return
  
  
  class _pkg_config_info(system_info):
      section = None
      config_env_var = 'PKG_CONFIG'
      default_config_exe = 'pkg-config'
      append_config_exe = ''
      version_macro_name = None
      release_macro_name = None
      version_flag = '--modversion'
      cflags_flag = '--cflags'
  
      def get_config_exe(self):
          if self.config_env_var in os.environ:
              return os.environ[self.config_env_var]
          return self.default_config_exe
  
      def get_config_output(self, config_exe, option):
          cmd = config_exe + ' ' + self.append_config_exe + ' ' + option
          try:
              o = subprocess.check_output(cmd)
          except (OSError, subprocess.CalledProcessError):
              pass
          else:
              o = filepath_from_subprocess_output(o)
              return o
  
      def calc_info(self):
          config_exe = find_executable(self.get_config_exe())
          if not config_exe:
              log.warn('File not found: %s. Cannot determine %s info.' \
                    % (config_exe, self.section))
              return
          info = {}
          macros = []
          libraries = []
          library_dirs = []
          include_dirs = []
          extra_link_args = []
          extra_compile_args = []
          version = self.get_config_output(config_exe, self.version_flag)
          if version:
              macros.append((self.__class__.__name__.split('.')[-1].upper(),
                             _c_string_literal(version)))
              if self.version_macro_name:
                  macros.append((self.version_macro_name + '_%s'
                                 % (version.replace('.', '_')), None))
          if self.release_macro_name:
              release = self.get_config_output(config_exe, '--release')
              if release:
                  macros.append((self.release_macro_name + '_%s'
                                 % (release.replace('.', '_')), None))
          opts = self.get_config_output(config_exe, '--libs')
          if opts:
              for opt in opts.split():
                  if opt[:2] == '-l':
                      libraries.append(opt[2:])
                  elif opt[:2] == '-L':
                      library_dirs.append(opt[2:])
                  else:
                      extra_link_args.append(opt)
          opts = self.get_config_output(config_exe, self.cflags_flag)
          if opts:
              for opt in opts.split():
                  if opt[:2] == '-I':
                      include_dirs.append(opt[2:])
                  elif opt[:2] == '-D':
                      if '=' in opt:
                          n, v = opt[2:].split('=')
                          macros.append((n, v))
                      else:
                          macros.append((opt[2:], None))
                  else:
                      extra_compile_args.append(opt)
          if macros:
              dict_append(info, define_macros=macros)
          if libraries:
              dict_append(info, libraries=libraries)
          if library_dirs:
              dict_append(info, library_dirs=library_dirs)
          if include_dirs:
              dict_append(info, include_dirs=include_dirs)
          if extra_link_args:
              dict_append(info, extra_link_args=extra_link_args)
          if extra_compile_args:
              dict_append(info, extra_compile_args=extra_compile_args)
          if info:
              self.set_info(**info)
          return
  
  
  class wx_info(_pkg_config_info):
      section = 'wx'
      config_env_var = 'WX_CONFIG'
      default_config_exe = 'wx-config'
      append_config_exe = ''
      version_macro_name = 'WX_VERSION'
      release_macro_name = 'WX_RELEASE'
      version_flag = '--version'
      cflags_flag = '--cxxflags'
  
  
  class gdk_pixbuf_xlib_2_info(_pkg_config_info):
      section = 'gdk_pixbuf_xlib_2'
      append_config_exe = 'gdk-pixbuf-xlib-2.0'
      version_macro_name = 'GDK_PIXBUF_XLIB_VERSION'
  
  
  class gdk_pixbuf_2_info(_pkg_config_info):
      section = 'gdk_pixbuf_2'
      append_config_exe = 'gdk-pixbuf-2.0'
      version_macro_name = 'GDK_PIXBUF_VERSION'
  
  
  class gdk_x11_2_info(_pkg_config_info):
      section = 'gdk_x11_2'
      append_config_exe = 'gdk-x11-2.0'
      version_macro_name = 'GDK_X11_VERSION'
  
  
  class gdk_2_info(_pkg_config_info):
      section = 'gdk_2'
      append_config_exe = 'gdk-2.0'
      version_macro_name = 'GDK_VERSION'
  
  
  class gdk_info(_pkg_config_info):
      section = 'gdk'
      append_config_exe = 'gdk'
      version_macro_name = 'GDK_VERSION'
  
  
  class gtkp_x11_2_info(_pkg_config_info):
      section = 'gtkp_x11_2'
      append_config_exe = 'gtk+-x11-2.0'
      version_macro_name = 'GTK_X11_VERSION'
  
  
  class gtkp_2_info(_pkg_config_info):
      section = 'gtkp_2'
      append_config_exe = 'gtk+-2.0'
      version_macro_name = 'GTK_VERSION'
  
  
  class xft_info(_pkg_config_info):
      section = 'xft'
      append_config_exe = 'xft'
      version_macro_name = 'XFT_VERSION'
  
  
  class freetype2_info(_pkg_config_info):
      section = 'freetype2'
      append_config_exe = 'freetype2'
      version_macro_name = 'FREETYPE2_VERSION'
  
  
  class amd_info(system_info):
      section = 'amd'
      dir_env_var = 'AMD'
      _lib_names = ['amd']
  
      def calc_info(self):
          lib_dirs = self.get_lib_dirs()
  
          opt = self.get_option_single('amd_libs', 'libraries')
          amd_libs = self.get_libs(opt, self._lib_names)
          info = self.check_libs(lib_dirs, amd_libs, [])
          if info is None:
              return
  
          include_dirs = self.get_include_dirs()
  
          inc_dir = None
          for d in include_dirs:
              p = self.combine_paths(d, 'amd.h')
              if p:
                  inc_dir = os.path.dirname(p[0])
                  break
          if inc_dir is not None:
              dict_append(info, include_dirs=[inc_dir],
                          define_macros=[('SCIPY_AMD_H', None)],
                          swig_opts=['-I' + inc_dir])
  
          self.set_info(**info)
          return
  
  
  class umfpack_info(system_info):
      section = 'umfpack'
      dir_env_var = 'UMFPACK'
      notfounderror = UmfpackNotFoundError
      _lib_names = ['umfpack']
  
      def calc_info(self):
          lib_dirs = self.get_lib_dirs()
  
          opt = self.get_option_single('umfpack_libs', 'libraries')
          umfpack_libs = self.get_libs(opt, self._lib_names)
          info = self.check_libs(lib_dirs, umfpack_libs, [])
          if info is None:
              return
  
          include_dirs = self.get_include_dirs()
  
          inc_dir = None
          for d in include_dirs:
              p = self.combine_paths(d, ['', 'umfpack'], 'umfpack.h')
              if p:
                  inc_dir = os.path.dirname(p[0])
                  break
          if inc_dir is not None:
              dict_append(info, include_dirs=[inc_dir],
                          define_macros=[('SCIPY_UMFPACK_H', None)],
                          swig_opts=['-I' + inc_dir])
  
          dict_append(info, **get_info('amd'))
  
          self.set_info(**info)
          return
  
  
  def combine_paths(*args, **kws):
      """ Return a list of existing paths composed by all combinations of
          items from arguments.
      """
      r = []
      for a in args:
          if not a:
              continue
          if is_string(a):
              a = [a]
          r.append(a)
      args = r
      if not args:
          return []
      if len(args) == 1:
          result = reduce(lambda a, b: a + b, map(glob, args[0]), [])
      elif len(args) == 2:
          result = []
          for a0 in args[0]:
              for a1 in args[1]:
                  result.extend(glob(os.path.join(a0, a1)))
      else:
          result = combine_paths(*(combine_paths(args[0], args[1]) + args[2:]))
      log.debug('(paths: %s)', ','.join(result))
      return result
  
  language_map = {'c': 0, 'c++': 1, 'f77': 2, 'f90': 3}
  inv_language_map = {0: 'c', 1: 'c++', 2: 'f77', 3: 'f90'}
  
  
  def dict_append(d, **kws):
      languages = []
      for k, v in kws.items():
          if k == 'language':
              languages.append(v)
              continue
          if k in d:
              if k in ['library_dirs', 'include_dirs',
                       'extra_compile_args', 'extra_link_args',
                       'runtime_library_dirs', 'define_macros']:
                  [d[k].append(vv) for vv in v if vv not in d[k]]
              else:
                  d[k].extend(v)
          else:
              d[k] = v
      if languages:
          l = inv_language_map[max([language_map.get(l, 0) for l in languages])]
          d['language'] = l
      return
  
  
  def parseCmdLine(argv=(None,)):
      import optparse
      parser = optparse.OptionParser("usage: %prog [-v] [info objs]")
      parser.add_option('-v', '--verbose', action='store_true', dest='verbose',
                        default=False,
                        help='be verbose and print more messages')
  
      opts, args = parser.parse_args(args=argv[1:])
      return opts, args
  
  
  def show_all(argv=None):
      import inspect
      if argv is None:
          argv = sys.argv
      opts, args = parseCmdLine(argv)
      if opts.verbose:
          log.set_threshold(log.DEBUG)
      else:
          log.set_threshold(log.INFO)
      show_only = []
      for n in args:
          if n[-5:] != '_info':
              n = n + '_info'
          show_only.append(n)
      show_all = not show_only
      _gdict_ = globals().copy()
      for name, c in _gdict_.items():
          if not inspect.isclass(c):
              continue
          if not issubclass(c, system_info) or c is system_info:
              continue
          if not show_all:
              if name not in show_only:
                  continue
              del show_only[show_only.index(name)]
          conf = c()
          conf.verbosity = 2
          # we don't need the result, but we want
          # the side effect of printing diagnostics
          conf.get_info()
      if show_only:
          log.info('Info classes not defined: %s', ','.join(show_only))
  
  if __name__ == "__main__":
      show_all()
  
apis: numpy.distutils.exec_command.filepath_from_subprocess_output numpy.distutils.fcompiler.new_fcompiler numpy.distutils.log.get_threshold numpy.distutils._shell_utils.NativeParser.split numpy.distutils.misc_util.is_sequence numpy.distutils.customized_ccompiler numpy.distutils.misc_util.is_string numpy.distutils.log.warn numpy.distutils.log.info numpy.distutils.log.set_threshold numpy.distutils.misc_util.get_shared_lib_extension