text: """
  Some helper functions for building the C extensions
  
  You may need to use the "basedirlist" option in setup.cfg to point
  to the location of your required libs, eg, png, z, freetype,
  overriding the settings hard-coded in the "basedir" directory
  below.
  
  DARWIN
  
    I have installed all of the backends on OSX.
  
    Tk: If you want to install TkAgg, I recommend the "batteries included"
    binary build of Tcl/Tk at
    http://www.apple.com/downloads/macosx/unix_open_source/tcltkaqua.html
  
    GTK: I installed GTK from src as described at
    http://www.macgimp.org/index.php?topic=gtk.  There are several
    packages, but all configure/make/make install w/o problem.  In
    addition to the packages listed there, You will also need libpng,
    libjpeg, and libtiff if you want output to these formats from GTK.
  
  WIN32 - MINGW
  
    If you are sufficiently masochistic that you want to build this
    yourself, download the win32_static dir from
    http://matplotlib.sourceforge.net/win32_static.tar.gz and
    see the README file in that dir
  
    > python setup.py build --compiler=mingw32 bdist_wininst  > build23.out
  
    NOTE, if you are building on python24 on win32, see
    http://mail.python.org/pipermail/python-list/2004-December/254826.html
  
  WIN32 - VISUAL STUDIO 7.1 (2003)
  
    This build is similar to the mingw.  Download the visual studio static
    dependencies from
    http://matplotlib.sourceforge.net/win32_static_vs.tar.gz and
    see the README in that dir
  
    > python setup.py build --compiler=msvc bdist_wininst
  
  """
  
  import os
  import re
  import subprocess
  from distutils import sysconfig
  
  basedir = {
      'win32'  : ['win32_static',],
      'linux2-alpha' : ['/usr/local', '/usr'],
      'linux2-hppa' : ['/usr/local', '/usr'],
      'linux2-mips' : ['/usr/local', '/usr'],
      'linux2-sparc' : ['/usr/local', '/usr'],
      'linux2' : ['/usr/local', '/usr'],
      'linux3' : ['/usr/local', '/usr'],
      'linux'  : ['/usr/local', '/usr',],
      'cygwin' : ['/usr/local', '/usr',],
      '_darwin' : ['/sw/lib/freetype2', '/sw/lib/freetype219', '/usr/local',
                  '/usr', '/sw'],
      # it appears builds with darwin are broken because of all the
      # different flags the deps can be compile with, so I am pushing
      # people to :
      #   make -f make.osx fetch deps mpl_build mpl_install
  
      'darwin' : [],
  
      'freebsd4' : ['/usr/local', '/usr'],
      'freebsd5' : ['/usr/local', '/usr'],
      'freebsd6' : ['/usr/local', '/usr'],
      'sunos5' : [os.getenv('MPLIB_BASE') or '/usr/local',],
      'gnukfreebsd5' : ['/usr/local', '/usr'],
      'gnukfreebsd6' : ['/usr/local', '/usr'],
      'gnukfreebsd7' : ['/usr/local', '/usr'],
      'gnukfreebsd8' : ['/usr/local', '/usr'],
      'gnu0' : ['/usr'],
      'aix5' : ['/usr/local'],
  }
  
  import sys, os, stat
  
  from textwrap import fill
  from distutils.core import Extension
  import glob
  
  if sys.version_info[0] < 3:
      import ConfigParser as configparser
      from cStringIO import StringIO
      if sys.platform != 'win32':
          from commands import getstatusoutput
  else:
      import configparser
      from io import StringIO
      if sys.platform != 'win32':
          from subprocess import getstatusoutput
  
  BUILT_PNG       = False
  BUILT_AGG       = False
  BUILT_FT2FONT   = False
  BUILT_TTCONV    = False
  BUILT_GTKAGG    = False
  BUILT_IMAGE     = False
  BUILT_MACOSX    = False
  BUILT_TKAGG     = False
  BUILT_WINDOWING = False
  BUILT_CONTOUR   = False
  BUILT_DELAUNAY  = False
  BUILT_NXUTILS   = False
  BUILT_CONTOUR   = False
  BUILT_GDK       = False
  BUILT_PATH      = False
  BUILT_TRI       = False
  
  AGG_VERSION = 'agg24'
  TCL_TK_CACHE = None
  
  # for nonstandard installation/build with --prefix variable
  numpy_inc_dirs = []
  
  # matplotlib build options, which can be altered using setup.cfg
  options = {'display_status': True,
             'verbose': False,
             'provide_pytz': 'auto',
             'provide_dateutil': 'auto',
             'build_agg': True,
             'build_gtk': 'auto',
             'build_gtkagg': 'auto',
             'build_tkagg': 'auto',
             'build_macosx': 'auto',
             'build_image': True,
             'build_windowing': True,
             'backend': None,
             'basedirlist': None}
  
  defines = [
          ('PY_ARRAY_UNIQUE_SYMBOL', 'MPL_ARRAY_API'),
          ('PYCXX_ISO_CPP_LIB', '1')]
  
  setup_cfg = os.environ.get('MPLSETUPCFG', 'setup.cfg')
  # Based on the contents of setup.cfg, determine the build options
  if os.path.exists(setup_cfg):
      config = configparser.SafeConfigParser()
      config.read(setup_cfg)
  
      try: options['display_status'] = not config.getboolean("status", "suppress")
      except: pass
  
      try: options['verbose'] = not config.getboolean("status", "verbose")
      except: pass
  
      try: options['provide_pytz'] = config.getboolean("provide_packages", "pytz")
      except: options['provide_pytz'] = 'auto'
  
      try: options['provide_dateutil'] = config.getboolean("provide_packages",
                                                           "dateutil")
      except: options['provide_dateutil'] = 'auto'
  
      try: options['build_gtk'] = config.getboolean("gui_support", "gtk")
      except: options['build_gtk'] = 'auto'
  
      try: options['build_gtkagg'] = config.getboolean("gui_support", "gtkagg")
      except: options['build_gtkagg'] = 'auto'
  
      try: options['build_tkagg'] = config.getboolean("gui_support", "tkagg")
      except: options['build_tkagg'] = 'auto'
  
      try: options['build_macosx'] = config.getboolean("gui_support", "macosx")
      except: options['build_macosx'] = 'auto'
  
      try: options['backend'] = config.get("rc_options", "backend")
      except: pass
  
      try: options['basedirlist'] = config.get("directories", "basedirlist")
      except: pass
  
  # For get_base_flags:
  if options['basedirlist']:
      basedirlist = options['basedirlist'].split()
  else:
      basedirlist = basedir[sys.platform]
  print("basedirlist is: %s" % basedirlist)
  
  if options['display_status']:
      def print_line(char='='):
          print(char * 76)
  
      def print_status(package, status):
          initial_indent = "%22s: " % package
          indent = ' ' * 24
          print(fill(str(status), width=76,
                     initial_indent=initial_indent,
                     subsequent_indent=indent))
  
      def print_message(message):
          indent = ' ' * 24 + "* "
          print(fill(str(message), width=76,
                     initial_indent=indent,
                     subsequent_indent=indent))
  
      def print_raw(section):
          print(section)
  else:
      def print_line(*args, **kwargs):
          pass
      print_status = print_message = print_raw = print_line
  
  # Remove the -Wstrict-prototypesoption, is it's not valid for C++
  customize_compiler = sysconfig.customize_compiler
  def my_customize_compiler(compiler):
      retval = customize_compiler(compiler)
      try:
          compiler.compiler_so.remove('-Wstrict-prototypes')
      except (ValueError, AttributeError):
          pass
      return retval
  
  sysconfig.customize_compiler = my_customize_compiler
  
  
  
  def run_child_process(cmd):
      p = subprocess.Popen(cmd, shell=True,
                           stdin=subprocess.PIPE,
                           stdout=subprocess.PIPE,
                           stderr=subprocess.STDOUT,
                           close_fds=(sys.platform != 'win32'))
      return p.stdin, p.stdout
  
  class CleanUpFile:
      """CleanUpFile deletes the specified filename when self is destroyed."""
      def __init__(self, name):
          self.name = name
      def __del__(self):
          os.remove(self.name)
  
  def temp_copy(_from, _to):
      """temp_copy copies a named file into a named temporary file.
      The temporary will be deleted when the setupext module is destructed.
      """
      # Copy the file data from _from to _to
      s = open(_from).read()
      open(_to,"w+").write(s)
      # Suppress object rebuild by preserving time stamps.
      stats = os.stat(_from)
      os.utime(_to, (stats.st_atime, stats.st_mtime))
      # Make an object to eliminate the temporary file at exit time.
      globals()["_cleanup_"+_to] = CleanUpFile(_to)
  
  def get_win32_compiler():
      # Used to determine mingw32 or msvc
      # This is pretty bad logic, someone know a better way?
      for v in sys.argv:
          if 'mingw32' in v:
              return 'mingw32'
      return 'msvc'
  win32_compiler = get_win32_compiler()
  if sys.platform == 'win32' and win32_compiler == 'msvc':
      std_libs = []
  else:
      std_libs = ['stdc++', 'm']
  
  def has_pkgconfig():
      if has_pkgconfig.cache is not None:
          return has_pkgconfig.cache
      if sys.platform == 'win32':
          has_pkgconfig.cache = False
      else:
          #print 'environ',  os.environ['PKG_CONFIG_PATH']
          status, output = getstatusoutput("pkg-config --help")
          has_pkgconfig.cache = (status == 0)
      return has_pkgconfig.cache
  has_pkgconfig.cache = None
  
  def get_pkgconfig(module,
                    packages,
                    flags="--libs --cflags",
                    pkg_config_exec='pkg-config',
                    report_error=False):
      """Loosely based on an article in the Python Cookbook:
      http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/502261"""
      if not has_pkgconfig():
          return False
  
      _flags = {'-I': 'include_dirs',
                '-L': 'library_dirs',
                '-l': 'libraries',
                '-D': 'define_macros',
                '-U': 'undef_macros'}
  
      cmd = "%s %s %s" % (pkg_config_exec, flags, packages)
      status, output = getstatusoutput(cmd)
      if status == 0:
          for token in output.split():
              attr = _flags.get(token[:2], None)
              if attr is not None:
                  if token[:2] == '-D':
                      value = tuple(token[2:].split('='))
                      if len(value) == 1:
                          value = (value[0], None)
                  else:
                      value = token[2:]
                  set = getattr(module, attr)
                  if value not in set:
                      set.append(value)
              else:
                  if token not in module.extra_link_args:
                      module.extra_link_args.append(token)
          return True
      if report_error:
          print_status("pkg-config", "looking for %s" % packages)
          print_message(output)
      return False
  
  def get_pkgconfig_version(package):
      default = "found, but unknown version (no pkg-config)"
      if not has_pkgconfig():
          return default
  
      status, output = getstatusoutput(
          "pkg-config %s --modversion" % (package))
      if status == 0:
          return output
      return default
  
  def try_pkgconfig(module, package, fallback):
      if not get_pkgconfig(module, package):
          module.libraries.append(fallback)
  
  def find_include_file(include_dirs, filename):
      for d in include_dirs:
          if os.path.exists(os.path.join(d, filename)):
              return True
      return False
  
  def check_for_freetype():
      module = Extension('test', [])
      add_base_flags(module)
      if not get_pkgconfig(module, 'freetype2'):
          basedirs = module.include_dirs[:]  # copy the list to avoid inf loop!
          for d in basedirs:
              module.include_dirs.append(os.path.join(d, 'freetype2'))
  
      print_status("freetype2", get_pkgconfig_version('freetype2'))
      if not find_include_file(module.include_dirs, 'ft2build.h'):
          print_message(
              "WARNING: Could not find 'freetype2' headers in any of %s." %
              ", ".join(["'%s'" % x for x in module.include_dirs]))
  
      return True
  
  def check_for_libpng():
      module = Extension("test", [])
      get_pkgconfig(module, 'libpng')
      add_base_flags(module)
  
      print_status("libpng", get_pkgconfig_version('libpng'))
      if not find_include_file(module.include_dirs, 'png.h'):
          print_message(
              "Could not find 'libpng' headers in any of %s" %
              ", ".join(["'%s'" % x for x in module.include_dirs]))
  
      return True
  
  def add_base_flags(module):
      incdirs = filter(os.path.exists,
                       [os.path.join(p, 'include') for p in basedirlist ])
      libdirs = filter(os.path.exists,
                       [os.path.join(p, 'lib')     for p in basedirlist ]+
                       [os.path.join(p, 'lib64')     for p in basedirlist ] )
  
      module.include_dirs.extend(incdirs)
      module.include_dirs.append('.')
      module.library_dirs.extend(libdirs)
  
  def getoutput(s):
      'get the output of a system command'
  
      ret =  os.popen(s).read().strip()
      return ret
  
  def convert_qt_version(version):
      version = '%x'%version
      temp = []
      while len(version) > 0:
          version, chunk = version[:-2], version[-2:]
          temp.insert(0, str(int(chunk, 16)))
      return '.'.join(temp)
  
  def check_for_qt():
      try:
          import pyqtconfig
      except ImportError:
          print_status("Qt", "no")
          return False
      else:
          try:
              qt_version = pyqtconfig.Configuration().qt_version
              qt_version = convert_qt_version(qt_version)
          except AttributeError:
              qt_version = "<unknown>"
          print_status("Qt", "Qt: %s, PyQt: %s" %
                       (qt_version,
                        pyqtconfig.Configuration().pyqt_version_str))
          return True
  
  def check_for_qt4():
      try:
          from PyQt4 import pyqtconfig
      except ImportError:
          print_status("Qt4", "no")
          return False
      else:
          print_status("Qt4", "Qt: %s, PyQt4: %s" %
                       (convert_qt_version(pyqtconfig.Configuration().qt_version),
                        pyqtconfig.Configuration().pyqt_version_str))
          return True
  
  def check_for_cairo():
      try:
          import cairo
      except ImportError:
          print_status("Cairo", "no")
          return False
      else:
          print_status("Cairo", cairo.version)
          return True
  
  def check_for_datetime():
      try:
          import datetime
      except ImportError:
          print_status("datetime", "no")
          return False
      else:
          print_status("datetime", "present, version unknown")
          return True
  
  def check_provide_pytz(hasdatetime=True):
      if hasdatetime and (options['provide_pytz'] is True):
          print_status("pytz", "matplotlib will provide")
          return True
      try:
          import pytz
      except ImportError:
          if hasdatetime and options['provide_pytz']:
              print_status("pytz", "matplotlib will provide")
              return True
          else:
              print_status("pytz", "no")
              return False
      else:
          if pytz.__version__.endswith('mpl'):
              print_status("pytz", "matplotlib will provide")
              return True
          else:
              print_status("pytz", pytz.__version__)
              return False
  
  def check_provide_dateutil(hasdatetime=True):
      if hasdatetime and (options['provide_dateutil'] is True):
          print_status("dateutil", "matplotlib will provide")
          return True
      try:
          import dateutil
      except ImportError:
          if hasdatetime and options['provide_dateutil']:
              print_status("dateutil", "matplotlib will provide")
              return True
          else:
              print_status("dateutil", "no")
              return False
      else:
          try:
              if dateutil.__version__.endswith('mpl'):
                  print_status("dateutil", "matplotlib will provide")
                  return True
              else:
                  print_status("dateutil", dateutil.__version__)
                  return False
          except AttributeError:
              print_status("dateutil", "present, version unknown")
              return False
  
  def check_for_dvipng():
      try:
          stdin, stdout = run_child_process('dvipng -version')
          print_status("dvipng", stdout.readlines()[1].decode().split()[-1])
          return True
      except (IndexError, ValueError):
          print_status("dvipng", "no")
          return False
  
  def check_for_ghostscript():
      try:
          if sys.platform == 'win32':
              command = 'gswin32c --version'
          else:
              command = 'gs --version'
          stdin, stdout = run_child_process(command)
          print_status("ghostscript", stdout.read().decode()[:-1])
          return True
      except (IndexError, ValueError):
          print_status("ghostscript", "no")
          return False
  
  def check_for_latex():
      try:
          stdin, stdout = run_child_process('latex -version')
          line = stdout.readlines()[0].decode()
          pattern = '(3\.1\d+)|(MiKTeX \d+.\d+)'
          match = re.search(pattern, line)
          print_status("latex", match.group(0))
          return True
      except (IndexError, ValueError, AttributeError):
          print_status("latex", "no")
          return False
  
  def check_for_pdftops():
      try:
          stdin, stdout = run_child_process('pdftops -v')
          for line in stdout.readlines():
              line = line.decode()
              if 'version' in line:
                  print_status("pdftops", line.split()[-1])
                  return True
      except (IndexError, ValueError):
          print_status("pdftops", "no")
          return False
  
  def check_for_numpy():
      try:
          import numpy
      except ImportError:
          print_status("numpy", "no")
          print_message("You must install numpy 1.1 or later to build matplotlib.")
          return False
      nn = numpy.__version__.split('.')
      if not (int(nn[0]) >= 1 and int(nn[1]) >= 1):
          if not (int(nn[0]) >= 2):
              print_message(
                 'numpy 1.1 or later is required; you have %s' %
                 numpy.__version__)
              return False
      module = Extension('test', [])
      add_numpy_flags(module)
      add_base_flags(module)
  
      print_status("numpy", numpy.__version__)
      if not find_include_file(module.include_dirs, os.path.join("numpy", "arrayobject.h")):
          print_message("Could not find the headers for numpy.  You may need to install the development package.")
          return False
      return True
  
  def add_numpy_flags(module):
      "Add the modules flags to build extensions which use numpy"
      import numpy
      module.include_dirs.append(numpy.get_include())
  
  def add_png_flags(module):
      try_pkgconfig(module, 'libpng', 'png')
      add_base_flags(module)
      add_numpy_flags(module)
      module.libraries.append('z')
      module.include_dirs.extend(['.'])
      module.libraries.extend(std_libs)
  
  def add_agg_flags(module):
      'Add the module flags to build extensions which use agg'
  
      # before adding the freetype flags since -z comes later
      add_base_flags(module)
      add_numpy_flags(module)
      module.include_dirs.extend(['src', '%s/include'%AGG_VERSION, '.'])
  
      # put these later for correct link order
      module.libraries.extend(std_libs)
  
  def add_ft2font_flags(module):
      'Add the module flags to ft2font extension'
      add_numpy_flags(module)
      if not get_pkgconfig(module, 'freetype2'):
          module.libraries.extend(['freetype', 'z'])
          add_base_flags(module)
  
          basedirs = module.include_dirs[:]  # copy the list to avoid inf loop!
          for d in basedirs:
              module.include_dirs.append(os.path.join(d, 'freetype2'))
              p = os.path.join(d, 'lib/freetype2/include')
              if os.path.exists(p): module.include_dirs.append(p)
              p = os.path.join(d, 'lib/freetype2/include/freetype2')
              if os.path.exists(p): module.include_dirs.append(p)
  
          basedirs = module.library_dirs[:]  # copy the list to avoid inf loop!
          for d in basedirs:
              p = os.path.join(d, 'freetype2/lib')
              if os.path.exists(p): module.library_dirs.append(p)
      else:
          add_base_flags(module)
          module.libraries.append('z')
  
      # put this last for library link order
      module.libraries.extend(std_libs)
  
  def check_for_gtk():
      'check for the presence of pygtk'
      gotit = False
      explanation = None
      try:
          import gtk
      except ImportError:
          explanation = 'Building for Gtk+ requires pygtk; you must be able to "import gtk" in your build/install environment'
      except RuntimeError:
          explanation = 'pygtk present but import failed'
      else:
          version = (2,2,0)
          if gtk.pygtk_version < version:
              explanation = "Error: GTK backend requires PyGTK %d.%d.%d (or later), " \
                    "%d.%d.%d was detected." % (
                  version + gtk.pygtk_version)
          else:
              gotit = True
  
      if gotit:
          module = Extension('test', [])
          add_pygtk_flags(module)
          if not find_include_file(module.include_dirs, os.path.join("gtk", "gtk.h")):
              explanation = (
                  "Could not find Gtk+ headers in any of %s" %
                  ", ".join(["'%s'" % x for x in module.include_dirs]))
              gotit = False
  
      def ver2str(tup):
          return ".".join([str(x) for x in tup])
  
      if gotit:
          import gobject
          if hasattr(gobject, 'pygobject_version'):
              pygobject_version = ver2str(gobject.pygobject_version)
          else:
              pygobject_version = '[pre-pygobject]'
          print_status("Gtk+", "gtk+: %s, glib: %s, pygtk: %s, pygobject: %s" %
                       (ver2str(gtk.gtk_version), ver2str(gobject.glib_version),
                        ver2str(gtk.pygtk_version), pygobject_version))
      else:
          print_status("Gtk+", "no")
  
      if explanation is not None:
          print_message(explanation)
  
      # Switch off the event loop for PyGTK >= 2.15.0
      if gotit:
          try:
              gtk.set_interactive(False)
          except AttributeError: # PyGTK < 2.15.0
              pass
  
      return gotit
  
  def add_pygtk_flags(module):
      'Add the module flags to build extensions which use gtk'
  
      if sys.platform=='win32':
          # popen broken on my win32 plaform so I can't use pkgconfig
          module.library_dirs.extend(
              ['C:/GTK/bin', 'C:/GTK/lib'])
  
          module.include_dirs.extend(
              ['win32_static/include/pygtk-2.0',
               'C:/GTK/include',
               'C:/GTK/include/gobject',
               'C:/GTK/include/gmodule',
               'C:/GTK/include/glib',
               'C:/GTK/include/pango',
               'C:/GTK/include/atk',
               'C:/GTK/include/X11',
               'C:/GTK/include/cairo',
               'C:/GTK/include/gdk',
               'C:/GTK/include/gdk-pixbuf',
               'C:/GTK/include/gtk',
               ])
  
          add_base_flags(module)
  
          if 'PKG_CONFIG_PATH' not in os.environ:
              # If Gtk+ is installed, pkg-config is required to be installed
              os.environ['PKG_CONFIG_PATH'] = 'C:\GTK\lib\pkgconfig'
  
          pygtkIncludes = getoutput('pkg-config --cflags-only-I pygtk-2.0').split()
          gtkIncludes = getoutput('pkg-config --cflags-only-I gtk+-2.0').split()
          includes = pygtkIncludes + gtkIncludes
          module.include_dirs.extend([include[2:] for include in includes])
  
          pygtkLinker = getoutput('pkg-config --libs pygtk-2.0').split()
          gtkLinker =  getoutput('pkg-config --libs gtk+-2.0').split()
          linkerFlags = pygtkLinker + gtkLinker
  
          module.libraries.extend(
              [flag[2:] for flag in linkerFlags if flag.startswith('-l')])
  
          module.library_dirs.extend(
              [flag[2:] for flag in linkerFlags if flag.startswith('-L')])
  
          module.extra_link_args.extend(
              [flag for flag in linkerFlags if not
               (flag.startswith('-l') or flag.startswith('-L'))])
  
          # visual studio doesn't need the math library
          if sys.platform == 'win32' and win32_compiler == 'msvc' and 'm' in module.libraries:
              module.libraries.remove('m')
  
      if sys.platform != 'win32':
          # If Gtk+ is installed, pkg-config is required to be installed
          add_base_flags(module)
          ok = get_pkgconfig(module, 'pygtk-2.0 gtk+-2.0', report_error=True)
          if not ok:
              print_message(
                  "You may need to install 'dev' package(s) to provide header files.")
      # visual studio doesn't need the math library
      if sys.platform == 'win32' and win32_compiler == 'msvc' and 'm' in module.libraries:
          module.libraries.remove('m')
  
  # Make sure you use the Tk version given by Tkinter.TkVersion
  # or else you'll build for a wrong version of the Tcl
  # interpreter (leading to nasty segfaults).
  def check_for_tk():
      gotit = False
      explanation = None
      try:
          import Tkinter
      except ImportError:
          explanation = 'TKAgg requires Tkinter'
      except RuntimeError:
          explanation = 'Tkinter present but import failed'
      else:
          if Tkinter.TkVersion < 8.3:
              explanation = "Tcl/Tk v8.3 or later required"
          else:
              gotit = True
  
      if gotit:
          module = Extension('test', [])
          try:
              explanation = add_tk_flags(module)
          except RuntimeError:
              # This deals with the change in exception handling syntax in
              # python 3. If we only need to support >= 2.6, we can just use the
              # commented out lines below.
              exc_type,exc,tb = sys.exc_info()
              explanation = str(exc)
              gotit = False
  #        except RuntimeError, e:
  #            explanation = str(e)
          else:
              if not find_include_file(module.include_dirs, "tk.h"):
                  message = 'Tkinter present, but header files are not found. ' + \
                            'You may need to install development packages.'
                  if explanation is not None:
                      explanation += '\n' + message
                  else:
                      explanation = message
                  gotit = False
  
      if gotit:
          try:
              tk_v = Tkinter.__version__.split()[-2]
          except (AttributeError, IndexError):
              # Tkinter.__version__ has been removed in python 3
              tk_v = 'version not identified'
          print_status("Tkinter", "Tkinter: %s, Tk: %s, Tcl: %s" %
                       (tk_v, Tkinter.TkVersion, Tkinter.TclVersion))
      else:
          print_status("Tkinter", "no")
      if explanation is not None:
          print_message(explanation)
      return gotit
  
  def check_for_macosx():
      gotit = False
      import sys
      if sys.platform=='darwin':
          gotit = True
      if gotit:
          print_status("Mac OS X native", "yes")
      else:
          print_status("Mac OS X native", "no")
      return gotit
  
  def query_tcltk():
      """Tries to open a Tk window in order to query the Tk object about its library paths.
         This should never be called more than once by the same process, as Tk intricacies
         may cause the Python interpreter to hang. The function also has a workaround if
         no X server is running (useful for autobuild systems)."""
      global TCL_TK_CACHE
      # Use cached values if they exist, which ensures this function only executes once
      if TCL_TK_CACHE is not None:
          return TCL_TK_CACHE
  
      # By this point, we already know that Tkinter imports correctly
      import Tkinter
      tcl_lib_dir = ''
      tk_lib_dir = ''
      # First try to open a Tk window (requires a running X server)
      try:
          tk = Tkinter.Tk()
      except Tkinter.TclError:
          # Next, start Tcl interpreter without opening a Tk window (no need for X server)
          # This feature is available in python version 2.4 and up
          try:
              tcl = Tkinter.Tcl()
          except AttributeError:    # Python version not high enough
              pass
          except Tkinter.TclError:  # Something went wrong while opening Tcl
              pass
          else:
              tcl_lib_dir = str(tcl.getvar('tcl_library'))
              # Guess Tk location based on Tcl location
              (head, tail) = os.path.split(tcl_lib_dir)
              tail = tail.replace('Tcl', 'Tk').replace('tcl', 'tk')
              tk_lib_dir = os.path.join(head, tail)
              if not os.path.exists(tk_lib_dir):
                  tk_lib_dir = tcl_lib_dir.replace('Tcl', 'Tk').replace('tcl', 'tk')
      else:
          # Obtain Tcl and Tk locations from Tk widget
          tk.withdraw()
          tcl_lib_dir = str(tk.getvar('tcl_library'))
          tk_lib_dir = str(tk.getvar('tk_library'))
          tk.destroy()
  
      # Save directories and version string to cache
      TCL_TK_CACHE = tcl_lib_dir, tk_lib_dir, str(Tkinter.TkVersion)[:3]
      return TCL_TK_CACHE
  
  def parse_tcl_config(tcl_lib_dir, tk_lib_dir):
      import Tkinter
      tcl_poss = [tcl_lib_dir,
                  os.path.normpath(os.path.join(tcl_lib_dir, '..')),
                  "/usr/lib/tcl"+str(Tkinter.TclVersion),
                  "/usr/lib"]
      tk_poss = [tk_lib_dir,
                  os.path.normpath(os.path.join(tk_lib_dir, '..')),
                 "/usr/lib/tk"+str(Tkinter.TkVersion),
                 "/usr/lib"]
      for ptcl, ptk in zip(tcl_poss, tk_poss):
          tcl_config = os.path.join(ptcl, "tclConfig.sh")
          tk_config = os.path.join(ptk, "tkConfig.sh")
          if (os.path.exists(tcl_config) and os.path.exists(tk_config)):
              break
      if not (os.path.exists(tcl_config) and os.path.exists(tk_config)):
          return None
  
      def get_var(file, varname):
          p = subprocess.Popen(
              '. %s ; eval echo ${%s}' % (file, varname),
              shell=True,
              executable="/bin/sh",
              stdout=subprocess.PIPE)
          result = p.communicate()[0]
          return result
  
      tcl_lib_dir = get_var(tcl_config, 'TCL_LIB_SPEC').split()[0][2:].strip()
      tcl_inc_dir = get_var(tcl_config, 'TCL_INCLUDE_SPEC')[2:].strip()
      tcl_lib = get_var(tcl_config, 'TCL_LIB_FLAG')[2:].strip()
  
      tk_lib_dir = get_var(tk_config, 'TK_LIB_SPEC').split()[0][2:].strip()
      tk_inc_dir = get_var(tk_config, 'TK_INCLUDE_SPEC').strip()
      if tk_inc_dir == '':
          tk_inc_dir = tcl_inc_dir
      else:
          tk_inc_dir = tk_inc_dir[2:]
      tk_lib = get_var(tk_config, 'TK_LIB_FLAG')[2:].strip()
  
      if not os.path.exists(os.path.join(tk_inc_dir, 'tk.h')):
          return None
  
      return tcl_lib_dir, tcl_inc_dir, tcl_lib, tk_lib_dir, tk_inc_dir, tk_lib
  
  def guess_tcl_config(tcl_lib_dir, tk_lib_dir, tk_ver):
      if not (os.path.exists(tcl_lib_dir) and os.path.exists(tk_lib_dir)):
          return None
  
      tcl_lib = os.path.normpath(os.path.join(tcl_lib_dir, '../'))
      tk_lib = os.path.normpath(os.path.join(tk_lib_dir, '../'))
  
      tcl_inc = os.path.normpath(os.path.join(tcl_lib_dir,
                                                      '../../include/tcl' + tk_ver))
      if not os.path.exists(tcl_inc):
          tcl_inc = os.path.normpath(os.path.join(tcl_lib_dir,
                                                  '../../include'))
  
      tk_inc = os.path.normpath(os.path.join(tk_lib_dir,
                                             '../../include/tk' + tk_ver))
      if not os.path.exists(tk_inc):
          tk_inc = os.path.normpath(os.path.join(tk_lib_dir,
                                                         '../../include'))
  
      if not os.path.exists(os.path.join(tk_inc, 'tk.h')):
          tk_inc = tcl_inc
  
      if not os.path.exists(tcl_inc):
          # this is a hack for suse linux, which is broken
          if (sys.platform.startswith('linux') and
              os.path.exists('/usr/include/tcl.h') and
              os.path.exists('/usr/include/tk.h')):
              tcl_inc = '/usr/include'
              tk_inc = '/usr/include'
  
      if not os.path.exists(os.path.join(tk_inc, 'tk.h')):
          return None
  
      return tcl_lib, tcl_inc, 'tcl' + tk_ver, tk_lib, tk_inc, 'tk' + tk_ver
  
  def hardcoded_tcl_config():
      tcl_inc = "/usr/local/include"
      tk_inc = "/usr/local/include"
      tcl_lib = "/usr/local/lib"
      tk_lib = "/usr/local/lib"
      return tcl_lib, tcl_inc, 'tcl', tk_lib, tk_inc, 'tk'
  
  def add_tk_flags(module):
      'Add the module flags to build extensions which use tk'
      message = None
      if sys.platform == 'win32':
          major, minor1, minor2, s, tmp = sys.version_info
          if major == 2 and minor1 in [6, 7]:
              module.include_dirs.extend(['win32_static/include/tcl85'])
              module.libraries.extend(['tk85', 'tcl85'])
          elif major == 2 and minor1 in [3, 4, 5]:
              module.include_dirs.extend(['win32_static/include/tcl84'])
              module.libraries.extend(['tk84', 'tcl84'])
          elif major == 2 and minor1 == 2:
              module.include_dirs.extend(['win32_static/include/tcl83'])
              module.libraries.extend(['tk83', 'tcl83'])
          else:
              raise RuntimeError('No tk/win32 support for this python version yet')
          module.library_dirs.extend([os.path.join(sys.prefix, 'dlls')])
  
      elif sys.platform == 'darwin':
          # this config section lifted directly from Imaging - thanks to
          # the effbot!
  
          # First test for a MacOSX/darwin framework install
          from os.path import join, exists
          framework_dirs = [
              join(os.getenv('HOME'), '/Library/Frameworks'),
              '/Library/Frameworks',
              '/System/Library/Frameworks/',
          ]
  
          # Find the directory that contains the Tcl.framework and Tk.framework
          # bundles.
          # XXX distutils should support -F!
          tk_framework_found = 0
          for F in framework_dirs:
              # both Tcl.framework and Tk.framework should be present
              for fw in 'Tcl', 'Tk':
                  if not exists(join(F, fw + '.framework')):
                      break
              else:
                  # ok, F is now directory with both frameworks. Continure
                  # building
                  tk_framework_found = 1
                  break
          if tk_framework_found:
              # For 8.4a2, we must add -I options that point inside the Tcl and Tk
              # frameworks. In later release we should hopefully be able to pass
              # the -F option to gcc, which specifies a framework lookup path.
              #
              tk_include_dirs = [
                  join(F, fw + '.framework', H)
                  for fw in ('Tcl', 'Tk')
                  for H in ('Headers', 'Versions/Current/PrivateHeaders')
              ]
  
              # For 8.4a2, the X11 headers are not included. Rather than include a
              # complicated search, this is a hard-coded path. It could bail out
              # if X11 libs are not found...
              # tk_include_dirs.append('/usr/X11R6/include')
              frameworks = ['-framework', 'Tcl', '-framework', 'Tk']
              module.include_dirs.extend(tk_include_dirs)
              module.extra_link_args.extend(frameworks)
              module.extra_compile_args.extend(frameworks)
  
      # you're still here? ok we'll try it this way...
      else:
          success = False
          # There are 3 methods to try, in decreasing order of "smartness"
          #
          #   1. Parse the tclConfig.sh and tkConfig.sh files that have
          #      all the information we need
          #
          #   2. Guess the include and lib dirs based on the location of
          #      Tkinter's 'tcl_library' and 'tk_library' variables.
          #
          #   3. Use some hardcoded locations that seem to work on a lot
          #      of distros.
  
          # Query Tcl/Tk system for library paths and version string
          try:
              tcl_lib_dir, tk_lib_dir, tk_ver = query_tcltk()
          except:
              tk_ver = ''
              result = hardcoded_tcl_config()
          else:
              result = parse_tcl_config(tcl_lib_dir, tk_lib_dir)
              if result is None:
                  message = """\
  Guessing the library and include directories for Tcl and Tk because the
  tclConfig.sh and tkConfig.sh could not be found and/or parsed."""
                  result = guess_tcl_config(tcl_lib_dir, tk_lib_dir, tk_ver)
                  if result is None:
                      message = """\
  Using default library and include directories for Tcl and Tk because a
  Tk window failed to open.  You may need to define DISPLAY for Tk to work
  so that setup can determine where your libraries are located."""
                      result = hardcoded_tcl_config()
  
          # Add final versions of directories and libraries to module lists
          tcl_lib_dir, tcl_inc_dir, tcl_lib, tk_lib_dir, tk_inc_dir, tk_lib = result
          module.include_dirs.extend([tcl_inc_dir, tk_inc_dir])
          module.library_dirs.extend([tcl_lib_dir, tk_lib_dir])
          module.libraries.extend([tcl_lib, tk_lib])
  
      return message
  
  def add_windowing_flags(module):
      'Add the module flags to build extensions using windowing api'
      module.include_dirs.extend(['C:/include'])
      module.libraries.extend(['user32'])
      module.library_dirs.extend(['C:/lib'])
      module.extra_link_args.append("-mwindows")
  
  def build_windowing(ext_modules, packages):
      """windowing is optional and provides functions for managing
         windows better, .e.g.  maintaining focus on win32"""
      global BUILT_WINDOWING
      if BUILT_WINDOWING: return # only build it if you you haven't already
      module = Extension('matplotlib._windowing',
                         ['src/_windowing.cpp'],
                         )
      add_windowing_flags(module)
      ext_modules.append(module)
      BUILT_WINDOWING = True
  
  def build_ft2font(ext_modules, packages):
      global BUILT_FT2FONT
      if BUILT_FT2FONT: return # only build it if you you haven't already
      deps = ['src/ft2font.cpp', 'src/mplutils.cpp']
      deps.extend(glob.glob('CXX/*.cxx'))
      deps.extend(glob.glob('CXX/*.c'))
  
      module = Extension('matplotlib.ft2font', deps,
                         define_macros=defines)
      add_ft2font_flags(module)
      ext_modules.append(module)
      BUILT_FT2FONT = True
  
  def build_ttconv(ext_modules, packages):
      global BUILT_TTCONV
      if BUILT_TTCONV: return # only build it if you you haven't already
      deps = ['src/_ttconv.cpp',
              'ttconv/pprdrv_tt.cpp',
              'ttconv/pprdrv_tt2.cpp',
              'ttconv/ttutil.cpp']
  
      module = Extension('matplotlib.ttconv', deps,
                         define_macros=defines)
      add_base_flags(module)
      ext_modules.append(module)
      BUILT_TTCONV = True
  
  def build_gtkagg(ext_modules, packages):
      global BUILT_GTKAGG
      if BUILT_GTKAGG: return # only build it if you you haven't already
      deps = ['src/agg_py_transforms.cpp', 'src/_gtkagg.cpp', 'src/mplutils.cpp']
      deps.extend(glob.glob('CXX/*.cxx'))
      deps.extend(glob.glob('CXX/*.c'))
  
      module = Extension('matplotlib.backends._gtkagg',
                         deps,
                         define_macros=defines
                         )
  
      # add agg flags before pygtk because agg only supports freetype1
      # and pygtk includes freetype2.  This is a bit fragile.
  
      add_agg_flags(module)
      add_ft2font_flags(module)
      add_pygtk_flags(module)
      add_numpy_flags(module)
  
      ext_modules.append(module)
      BUILT_GTKAGG = True
  
  def build_tkagg(ext_modules, packages):
      global BUILT_TKAGG
      if BUILT_TKAGG: return # only build it if you you haven't already
      deps = ['src/agg_py_transforms.cpp', 'src/_tkagg.cpp']
      deps.extend(glob.glob('CXX/*.cxx'))
      deps.extend(glob.glob('CXX/*.c'))
  
      module = Extension('matplotlib.backends._tkagg',
                         deps,
                         define_macros=defines
                         )
  
      add_tk_flags(module) # do this first
      add_agg_flags(module)
      add_ft2font_flags(module)
  
      ext_modules.append(module)
      BUILT_TKAGG = True
  
  
  def build_macosx(ext_modules, packages):
      global BUILT_MACOSX
      if BUILT_MACOSX: return # only build it if you you haven't already
      deps = ['src/_macosx.m',
              'CXX/cxx_extensions.cxx',
              'CXX/cxxextensions.c',
              'CXX/cxxsupport.cxx',
              'CXX/IndirectPythonInterface.cxx',
              'src/agg_py_transforms.cpp',
              'src/path_cleanup.cpp']
      module = Extension('matplotlib.backends._macosx',
                         deps,
                         extra_link_args = ['-framework','Cocoa'],
                         define_macros=defines
                        )
      add_numpy_flags(module)
      add_agg_flags(module)
      ext_modules.append(module)
      BUILT_MACOSX = True
  
  def build_png(ext_modules, packages):
      global BUILT_PNG
      if BUILT_PNG: return # only build it if you you haven't already
  
      deps = ['src/_png.cpp', 'src/mplutils.cpp']
      deps.extend(glob.glob('CXX/*.cxx'))
      deps.extend(glob.glob('CXX/*.c'))
  
      module = Extension(
          'matplotlib._png',
          deps,
          include_dirs=numpy_inc_dirs,
          define_macros=defines
          )
  
      add_png_flags(module)
      ext_modules.append(module)
  
      BUILT_PNG = True
  
  
  def build_agg(ext_modules, packages):
      global BUILT_AGG
      if BUILT_AGG: return # only build it if you you haven't already
  
      agg = (
             'agg_trans_affine.cpp',
             'agg_bezier_arc.cpp',
             'agg_curves.cpp',
             'agg_vcgen_dash.cpp',
             'agg_vcgen_stroke.cpp',
             'agg_image_filters.cpp',
             )
  
      deps = ['%s/src/%s'%(AGG_VERSION, name) for name in agg]
      deps.extend(['src/mplutils.cpp', 'src/agg_py_transforms.cpp'])
      deps.extend(glob.glob('CXX/*.cxx'))
      deps.extend(glob.glob('CXX/*.c'))
      temp_copy('src/_backend_agg.cpp', 'src/backend_agg.cpp')
      deps.append('src/backend_agg.cpp')
      module = Extension(
          'matplotlib.backends._backend_agg',
          deps,
          include_dirs=numpy_inc_dirs,
          define_macros=defines
          )
  
      add_numpy_flags(module)
      add_agg_flags(module)
      add_ft2font_flags(module)
      ext_modules.append(module)
  
      BUILT_AGG = True
  
  def build_path(ext_modules, packages):
      global BUILT_PATH
      if BUILT_PATH: return # only build it if you you haven't already
  
      agg = (
             'agg_vcgen_contour.cpp',
             'agg_curves.cpp',
             'agg_bezier_arc.cpp',
             'agg_trans_affine.cpp',
             'agg_vcgen_stroke.cpp',
             )
  
      deps = ['%s/src/%s'%(AGG_VERSION, name) for name in agg]
      deps.extend(glob.glob('CXX/*.cxx'))
      deps.extend(glob.glob('CXX/*.c'))
  
      temp_copy('src/_path.cpp', 'src/path.cpp')
      deps.extend(['src/agg_py_transforms.cpp',
                   'src/path_cleanup.cpp',
                   'src/path.cpp'])
      module = Extension(
          'matplotlib._path',
          deps,
          include_dirs=numpy_inc_dirs,
          define_macros=defines
          )
  
      add_numpy_flags(module)
  
      add_agg_flags(module)
      ext_modules.append(module)
  
      BUILT_PATH = True
  
  def build_image(ext_modules, packages):
      global BUILT_IMAGE
      if BUILT_IMAGE: return # only build it if you you haven't already
  
      agg = ('agg_trans_affine.cpp',
             'agg_image_filters.cpp',
             'agg_bezier_arc.cpp',
             )
  
      temp_copy('src/_image.cpp', 'src/image.cpp')
      deps = ['src/image.cpp', 'src/mplutils.cpp']
      deps.extend(['%s/src/%s'%(AGG_VERSION,name) for name in agg])
      deps.extend(glob.glob('CXX/*.cxx'))
      deps.extend(glob.glob('CXX/*.c'))
  
      module = Extension(
          'matplotlib._image',
          deps,
          include_dirs=numpy_inc_dirs,
          define_macros=defines
          )
  
      add_numpy_flags(module)
      add_agg_flags(module)
      ext_modules.append(module)
  
      BUILT_IMAGE = True
  
  
  
  def build_delaunay(ext_modules, packages):
      global BUILT_DELAUNAY
      if BUILT_DELAUNAY:
          return # only build it if you you haven't already
  
      sourcefiles=["_delaunay.cpp", "VoronoiDiagramGenerator.cpp",
                   "delaunay_utils.cpp", "natneighbors.cpp"]
      sourcefiles = [os.path.join('lib/matplotlib/delaunay',s) for s in sourcefiles]
      delaunay = Extension('matplotlib._delaunay',sourcefiles,
                           include_dirs=numpy_inc_dirs,
                           define_macros=defines
                           )
      add_numpy_flags(delaunay)
      add_base_flags(delaunay)
      ext_modules.append(delaunay)
      packages.extend(['matplotlib.delaunay'])
      BUILT_DELAUNAY = True
  
  
  def build_contour(ext_modules, packages):
      global BUILT_CONTOUR
      if BUILT_CONTOUR: return # only build it if you you haven't already
  
      module = Extension(
          'matplotlib._cntr',
          [ 'src/cntr.c'],
          include_dirs=numpy_inc_dirs,
          define_macros=defines
          )
      add_numpy_flags(module)
      add_base_flags(module)
      ext_modules.append(module)
  
      BUILT_CONTOUR = True
  
  
  def build_nxutils(ext_modules, packages):
      global BUILT_NXUTILS
      if BUILT_NXUTILS: return # only build it if you you haven't already
      module = Extension(
          'matplotlib.nxutils',
          [ 'src/nxutils.c'],
          include_dirs=numpy_inc_dirs,
          define_macros=defines
          )
      add_numpy_flags(module)
      add_base_flags(module)
      ext_modules.append(module)
  
      BUILT_NXUTILS = True
  
  
  def build_gdk(ext_modules, packages):
      global BUILT_GDK
      if BUILT_GDK: return # only build it if you you haven't already
  
      temp_copy('src/_backend_gdk.c', 'src/backend_gdk.c')
      module = Extension(
          'matplotlib.backends._backend_gdk',
          ['src/backend_gdk.c'],
          libraries = [],
          include_dirs=numpy_inc_dirs,
          define_macros=defines
          )
  
      add_numpy_flags(module)
      add_base_flags(module)
      add_pygtk_flags(module)
      ext_modules.append(module)
  
      BUILT_GDK = True
  
  
  def build_tri(ext_modules, packages):
      global BUILT_TRI
      if BUILT_TRI: return # only build it if you you haven't already
  
      deps = ['lib/matplotlib/tri/_tri.cpp', 'src/mplutils.cpp']
      deps.extend(glob.glob('CXX/*.cxx'))
      deps.extend(glob.glob('CXX/*.c'))
  
      module = Extension('matplotlib._tri', deps,
                         define_macros=defines)
      add_numpy_flags(module)
      add_base_flags(module)
      ext_modules.append(module)
      BUILT_TRI = True
  