setup.py

# Autodetecting setup.py script for building the Python extensions
#

__version__ = "$Revision$"

import sys, os, getopt, imp, re

from distutils import log
from distutils import sysconfig
from distutils import text_file
from distutils.errors import *
from distutils.core import Extension, setup
from distutils.command.build_ext import build_ext
from distutils.command.install import install
from distutils.command.install_lib import install_lib

# This global variable is used to hold the list of modules to be disabled.
disabled_module_list = []

def add_dir_to_list(dirlist, dir):
    """Add the directory 'dir' to the list 'dirlist' (at the front) if
    1) 'dir' is not already in 'dirlist'
    2) 'dir' actually exists, and is a directory."""
    if dir is not None and os.path.isdir(dir) and dir not in dirlist:
        dirlist.insert(0, dir)

def find_file(filename, std_dirs, paths):
    """Searches for the directory where a given file is located,
    and returns a possibly-empty list of additional directories, or None
    if the file couldn't be found at all.

    'filename' is the name of a file, such as readline.h or libcrypto.a.
    'std_dirs' is the list of standard system directories; if the
        file is found in one of them, no additional directives are needed.
    'paths' is a list of additional locations to check; if the file is
        found in one of them, the resulting list will contain the directory.
    """

    # Check the standard locations
    for dir in std_dirs:
        f = os.path.join(dir, filename)
        if os.path.exists(f): return []

    # Check the additional directories
    for dir in paths:
        f = os.path.join(dir, filename)
        if os.path.exists(f):
            return [dir]

    # Not found anywhere
    return None

def find_library_file(compiler, libname, std_dirs, paths):
    result = compiler.find_library_file(std_dirs + paths, libname)
    if result is None:
        return None

    # Check whether the found file is in one of the standard directories
    dirname = os.path.dirname(result)
    for p in std_dirs:
        # Ensure path doesn't end with path separator
        if p.endswith(os.sep):
            p = p.strip(os.sep)
        if p == dirname:
            return [ ]

    # Otherwise, it must have been in one of the additional directories,
    # so we have to figure out which one.
    for p in paths:
        # Ensure path doesn't end with path separator
        if p.endswith(os.sep):
            p = p.strip(os.sep)
        if p == dirname:
            return [p]
    else:
        assert False, "Internal error: Path not found in std_dirs or paths"
        
def module_enabled(extlist, modname):
    """Returns whether the module 'modname' is present in the list
    of extensions 'extlist'."""
    extlist = [ext for ext in extlist if ext.name == modname]
    return len(extlist)

def find_module_file(module, dirlist):
    """Find a module in a set of possible folders. If it is not found
    return the unadorned filename"""
    list = find_file(module, [], dirlist)
    if not list:
        return module
    if len(list) > 1:
        self.announce("WARNING: multiple copies of %s found"%module)
    return os.path.join(list[0], module)

class PyBuildExt(build_ext):

    def build_extensions(self):

        # Detect which modules should be compiled
        self.detect_modules()

        # Remove modules that are present on the disabled list
        self.extensions = [ext for ext in self.extensions
                           if ext.name not in disabled_module_list]

        # Fix up the autodetected modules, prefixing all the source files
        # with Modules/ and adding Python's include directory to the path.
        (srcdir,) = sysconfig.get_config_vars('srcdir')
        if not srcdir:
            # Maybe running on Windows but not using CYGWIN?
            raise ValueError("No source directory; cannot proceed.")

        # Figure out the location of the source code for extension modules
        moddir = os.path.join(os.getcwd(), srcdir, 'Modules')
        moddir = os.path.normpath(moddir)
        srcdir, tail = os.path.split(moddir)
        srcdir = os.path.normpath(srcdir)
        moddir = os.path.normpath(moddir)

        moddirlist = [moddir]
        incdirlist = ['./Include']

        # Platform-dependent module source and include directories
        platform = self.get_platform()
        if platform in ('darwin', 'mac'):
            # Mac OS X also includes some mac-specific modules
            macmoddir = os.path.join(os.getcwd(), srcdir, 'Mac/Modules')
            moddirlist.append(macmoddir)
            incdirlist.append('./Mac/Include')

        alldirlist = moddirlist + incdirlist

        # Fix up the paths for scripts, too
        self.distribution.scripts = [os.path.join(srcdir, filename)
                                     for filename in self.distribution.scripts]

        for ext in self.extensions[:]:
            ext.sources = [ find_module_file(filename, moddirlist)
                            for filename in ext.sources ]
            if ext.depends is not None:
                ext.depends = [find_module_file(filename, alldirlist)
                               for filename in ext.depends]
            ext.include_dirs.append( '.' ) # to get config.h
            for incdir in incdirlist:
                ext.include_dirs.append( os.path.join(srcdir, incdir) )

            # If a module has already been built statically,
            # don't build it here
            if ext.name in sys.builtin_module_names:
                self.extensions.remove(ext)

        if platform != 'mac':
            # Parse Modules/Setup to figure out which modules are turned
            # on in the file.
            input = text_file.TextFile('Modules/Setup', join_lines=1)
            remove_modules = []
            while 1:
                line = input.readline()
                if not line: break
                line = line.split()
                remove_modules.append( line[0] )
            input.close()
    
            for ext in self.extensions[:]:
                if ext.name in remove_modules:
                    self.extensions.remove(ext)

        # When you run "make CC=altcc" or something similar, you really want
        # those environment variables passed into the setup.py phase.  Here's
        # a small set of useful ones.
        compiler = os.environ.get('CC')
        linker_so = os.environ.get('LDSHARED')
        args = {}
        # unfortunately, distutils doesn't let us provide separate C and C++
        # compilers
        if compiler is not None:
            (ccshared,opt,base) = sysconfig.get_config_vars('CCSHARED','OPT','BASECFLAGS')
            args['compiler_so'] = compiler + ' ' + opt + ' ' + ccshared + ' ' + base
        if linker_so is not None:
            args['linker_so'] = linker_so
        self.compiler.set_executables(**args)

        build_ext.build_extensions(self)

    def build_extension(self, ext):

        try:
            build_ext.build_extension(self, ext)
        except (CCompilerError, DistutilsError), why:
            self.announce('WARNING: building of extension "%s" failed: %s' %
                          (ext.name, sys.exc_info()[1]))
            return
        # Workaround for Mac OS X: The Carbon-based modules cannot be
        # reliably imported into a command-line Python
        if 'Carbon' in ext.extra_link_args:
            self.announce(
                'WARNING: skipping import check for Carbon-based "%s"' %
                ext.name)
            return
        # Workaround for Cygwin: Cygwin currently has fork issues when many
        # modules have been imported
        if self.get_platform() == 'cygwin':
            self.announce('WARNING: skipping import check for Cygwin-based "%s"'
                % ext.name)
            return
        ext_filename = os.path.join(
            self.build_lib,
            self.get_ext_filename(self.get_ext_fullname(ext.name)))
        try:
            imp.load_dynamic(ext.name, ext_filename)
        except ImportError, why:

            if 1:
                self.announce('*** WARNING: renaming "%s" since importing it'
                              ' failed: %s' % (ext.name, why))
                assert not self.inplace
                basename, tail = os.path.splitext(ext_filename)
                newname = basename + "_failed" + tail
                if os.path.exists(newname): os.remove(newname)
                os.rename(ext_filename, newname)

                # XXX -- This relies on a Vile HACK in
                # distutils.command.build_ext.build_extension().  The
                # _built_objects attribute is stored there strictly for
                # use here.
                # If there is a failure, _built_objects may not be there,
                # so catch the AttributeError and move on.
                try:
                    for filename in self._built_objects:
                        os.remove(filename)
                except AttributeError:
                    self.announce('unable to remove files (ignored)')
            else:
                self.announce('*** WARNING: importing extension "%s" '
                              'failed: %s' % (ext.name, why))

    def get_platform (self):
        # Get value of sys.platform
        platform = sys.platform
        if platform[:6] =='cygwin':
            platform = 'cygwin'
        elif platform[:4] =='beos':
            platform = 'beos'
        elif platform[:6] == 'darwin':
            platform = 'darwin'
        elif platform[:6] == 'atheos':
            platform = 'atheos'

        return platform

    def detect_modules(self):
        # Ensure that /usr/local is always used
        add_dir_to_list(self.compiler.library_dirs, '/usr/local/lib')
        add_dir_to_list(self.compiler.include_dirs, '/usr/local/include')

        # fink installs lots of goodies in /sw/... - make sure we
        # check there
        if sys.platform == "darwin":
            add_dir_to_list(self.compiler.library_dirs, '/sw/lib')
            add_dir_to_list(self.compiler.include_dirs, '/sw/include')

        if os.path.normpath(sys.prefix) != '/usr':
            add_dir_to_list(self.compiler.library_dirs,
                            sysconfig.get_config_var("LIBDIR"))
            add_dir_to_list(self.compiler.include_dirs,
                            sysconfig.get_config_var("INCLUDEDIR"))

        try:
            have_unicode = unicode
        except NameError:
            have_unicode = 0

        # lib_dirs and inc_dirs are used to search for files;
        # if a file is found in one of those directories, it can
        # be assumed that no additional -I,-L directives are needed.
        lib_dirs = self.compiler.library_dirs + ['/lib', '/usr/lib']
        inc_dirs = self.compiler.include_dirs + ['/usr/include']
        exts = []

        platform = self.get_platform()
        (srcdir,) = sysconfig.get_config_vars('srcdir')

        # Check for AtheOS which has libraries in non-standard locations
        if platform == 'atheos':
            lib_dirs += ['/system/libs', '/atheos/autolnk/lib']
            lib_dirs += os.getenv('LIBRARY_PATH', '').split(os.pathsep)
            inc_dirs += ['/system/include', '/atheos/autolnk/include']
            inc_dirs += os.getenv('C_INCLUDE_PATH', '').split(os.pathsep)

        # Check for MacOS X, which doesn't need libm.a at all
        math_libs = ['m']
        if platform in ['darwin', 'beos', 'mac']:
            math_libs = []

        # XXX Omitted modules: gl, pure, dl, SGI-specific modules

        #
        # The following modules are all pretty straightforward, and compile
        # on pretty much any POSIXish platform.
        #

        # Some modules that are normally always on:
        exts.append( Extension('regex', ['regexmodule.c', 'regexpr.c']) )
        exts.append( Extension('pcre', ['pcremodule.c', 'pypcre.c']) )

        exts.append( Extension('_hotshot', ['_hotshot.c']) )
        exts.append( Extension('_weakref', ['_weakref.c']) )
        exts.append( Extension('xreadlines', ['xreadlinesmodule.c']) )

        # array objects
        exts.append( Extension('array', ['arraymodule.c']) )
        # complex math library functions
        exts.append( Extension('cmath', ['cmathmodule.c'],
                               libraries=math_libs) )

        # math library functions, e.g. sin()
        exts.append( Extension('math',  ['mathmodule.c'],
                               libraries=math_libs) )
        # fast string operations implemented in C
        exts.append( Extension('strop', ['stropmodule.c']) )
        # time operations and variables
        exts.append( Extension('time', ['timemodule.c'],
                               libraries=math_libs) )
        exts.append( Extension('datetime', ['datetimemodule.c'],
                               libraries=math_libs) )
        # random number generator implemented in C
        exts.append( Extension("_random", ["_randommodule.c"]) )       
        # operator.add() and similar goodies
        exts.append( Extension('operator', ['operator.c']) )
        # Python C API test module
        exts.append( Extension('_testcapi', ['_testcapimodule.c']) )
        # static Unicode character database
        if have_unicode:
            exts.append( Extension('unicodedata', ['unicodedata.c']) )
        # access to ISO C locale support
        if platform in ['cygwin']:
            locale_libs = ['intl']
        else:
            locale_libs = []
        exts.append( Extension('_locale', ['_localemodule.c'],
                               libraries=locale_libs ) )

        # Modules with some UNIX dependencies -- on by default:
        # (If you have a really backward UNIX, select and socket may not be
        # supported...)

        # fcntl(2) and ioctl(2)
        exts.append( Extension('fcntl', ['fcntlmodule.c']) )
        if platform not in ['mac']:
                # pwd(3)
                exts.append( Extension('pwd', ['pwdmodule.c']) )
                # grp(3)
                exts.append( Extension('grp', ['grpmodule.c']) )
        # select(2); not on ancient System V
        exts.append( Extension('select', ['selectmodule.c']) )

        # The md5 module implements the RSA Data Security, Inc. MD5
        # Message-Digest Algorithm, described in RFC 1321.  The
        # necessary files md5c.c and md5.h are included here.
        exts.append( Extension('md5', ['md5module.c', 'md5c.c']) )

        # The sha module implements the SHA checksum algorithm.
        # (NIST's Secure Hash Algorithm.)
        exts.append( Extension('sha', ['shamodule.c']) )

        # Helper module for various ascii-encoders
        exts.append( Extension('binascii', ['binascii.c']) )

        # Fred Drake's interface to the Python parser
        exts.append( Extension('parser', ['parsermodule.c']) )

        # cStringIO and cPickle
        exts.append( Extension('cStringIO', ['cStringIO.c']) )
        exts.append( Extension('cPickle', ['cPickle.c']) )

        # Memory-mapped files (also works on Win32).
        if platform not in ['atheos', 'mac']:
            exts.append( Extension('mmap', ['mmapmodule.c']) )

        # Lance Ellinghaus's modules:
        # enigma-inspired encryption
        exts.append( Extension('rotor', ['rotormodule.c']) )
        if platform not in ['mac']:
                # syslog daemon interface
                exts.append( Extension('syslog', ['syslogmodule.c']) )

        # George Neville-Neil's timing module:
        exts.append( Extension('timing', ['timingmodule.c']) )

        #
        # Here ends the simple stuff.  From here on, modules need certain
        # libraries, are platform-specific, or present other surprises.
        #

        # Multimedia modules
        # These don't work for 64-bit platforms!!!
        # These represent audio samples or images as strings:

        # Disabled on 64-bit platforms
        if sys.maxint != 9223372036854775807L:
            # Operations on audio samples
            exts.append( Extension('audioop', ['audioop.c']) )
            # Operations on images
            exts.append( Extension('imageop', ['imageop.c']) )
            # Read SGI RGB image files (but coded portably)
            exts.append( Extension('rgbimg', ['rgbimgmodule.c']) )

        # readline
        if self.compiler.find_library_file(lib_dirs, 'readline'):
            readline_libs = ['readline']
            if self.compiler.find_library_file(lib_dirs,
                                                 'ncurses'):
                readline_libs.append('ncurses')
            elif self.compiler.find_library_file(lib_dirs +
                                               ['/usr/lib/termcap'],
                                               'termcap'):
                readline_libs.append('termcap')
            exts.append( Extension('readline', ['readline.c'],
                                   library_dirs=['/usr/lib/termcap'],
                                   libraries=readline_libs) )
        if platform not in ['mac']:
                # crypt module.
        
                if self.compiler.find_library_file(lib_dirs, 'crypt'):
                    libs = ['crypt']
                else:
                    libs = []
                exts.append( Extension('crypt', ['cryptmodule.c'], libraries=libs) )

        # socket(2)
        exts.append( Extension('_socket', ['socketmodule.c'],
                               depends = ['socketmodule.h']) )
        # Detect SSL support for the socket module (via _ssl)
        ssl_incs = find_file('openssl/ssl.h', inc_dirs,
                             ['/usr/local/ssl/include',
                              '/usr/contrib/ssl/include/'
                             ]
                             )
        ssl_libs = find_library_file(self.compiler, 'ssl',lib_dirs,
                                     ['/usr/local/ssl/lib',
                                      '/usr/contrib/ssl/lib/'
                                     ] )

        if (ssl_incs is not None and
            ssl_libs is not None):
            exts.append( Extension('_ssl', ['_ssl.c'],
                                   include_dirs = ssl_incs,
                                   library_dirs = ssl_libs,
                                   libraries = ['ssl', 'crypto'],
                                   depends = ['socketmodule.h']), )

        # Modules that provide persistent dictionary-like semantics.  You will
        # probably want to arrange for at least one of them to be available on
        # your machine, though none are defined by default because of library
        # dependencies.  The Python module anydbm.py provides an
        # implementation independent wrapper for these; dumbdbm.py provides
        # similar functionality (but slower of course) implemented in Python.

        # Sleepycat Berkeley DB interface.  http://www.sleepycat.com
        #
        # This requires the Sleepycat DB code. The earliest supported version
        # of that library is 3.0, the latest supported version is 4.1.  A list
        # of available releases can be found at
        #
        # http://www.sleepycat.com/update/index.html

        # when sorted in reverse order, keys for this dict must appear in the
        # order you wish to search - e.g., search for db4 before db3
        db_try_this = {
            'db4': {'libs': ('db-4.1', 'db-4.0',),
                    'libdirs': ('/usr/local/BerkeleyDB.4.1/lib',
                                '/usr/local/BerkeleyDB.4.0/lib',
                                '/usr/local/lib',
                                '/opt/sfw',
                                '/sw/lib',
                                ),
                    'incdirs': ('/usr/local/BerkeleyDB.4.1/include',
                                '/usr/local/BerkeleyDB.4.0/include',
                                '/usr/local/include/db4',
                                '/opt/sfw/include/db4',
                                '/sw/include/db4',
                                '/usr/include/db4',
                                )},
            'db3': {'libs': ('db-3.3', 'db-3.2', 'db-3.1', 'db-3.0'),
                    'libdirs': ('/usr/local/BerkeleyDB.3.3/lib',
                                '/usr/local/BerkeleyDB.3.2/lib',
                                '/usr/local/BerkeleyDB.3.1/lib',
                                '/usr/local/BerkeleyDB.3.0/lib',
                                '/usr/local/lib',
                                '/opt/sfw/lib',
                                '/sw/lib',
                                ),
                    'incdirs': ('/usr/local/BerkeleyDB.3.3/include',
                                '/usr/local/BerkeleyDB.3.2/include',
                                '/usr/local/BerkeleyDB.3.1/include',
                                '/usr/local/BerkeleyDB.3.0/include',
                                '/usr/local/include/db3',
                                '/opt/sfw/include/db3',
                                '/sw/include/db3',
                                '/usr/include/db3',
                                )},
            }

        db_search_order = db_try_this.keys()
        db_search_order.sort()
        db_search_order.reverse()
        
        class found(Exception): pass
        try:
            # See whether there is a Sleepycat header in the standard
            # search path.
            std_dbinc = None
            for d in inc_dirs:
                f = os.path.join(d, "db.h")
                if os.path.exists(f):
                    f = open(f).read()
                    m = re.search(r"#define\WDB_VERSION_MAJOR\W([1-9]+)", f)
                    if m:
                        std_dbinc = 'db' + m.group(1)
            for dbkey in db_search_order:
                dbd = db_try_this[dbkey]
                for dblib in dbd['libs']:
                    # Prefer version-specific includes over standard
                    # include locations.
                    db_incs = find_file('db.h', [], dbd['incdirs'])
                    dblib_dir = find_library_file(self.compiler,
                                                  dblib,
                                                  lib_dirs,
                                                  list(dbd['libdirs']))
                    if (db_incs or dbkey == std_dbinc) and \
                           dblib_dir is not None:
                        dblibs = [dblib]
                        raise found
        except found:
            dblibs = [dblib]
            # A default source build puts Berkeley DB in something like
            # /usr/local/Berkeley.3.3 and the lib dir under that isn't
            # normally on ld.so's search path, unless the sysadmin has hacked
            # /etc/ld.so.conf.  We add the directory to runtime_library_dirs
            # so the proper -R/--rpath flags get passed to the linker.  This
            # is usually correct and most trouble free, but may cause problems
            # in some unusual system configurations (e.g. the directory is on
            # an NFS server that goes away).
            exts.append(Extension('_bsddb', ['_bsddb.c'],
                                  library_dirs=dblib_dir,
                                  runtime_library_dirs=dblib_dir,
                                  include_dirs=db_incs,
                                  libraries=dblibs))
        else:
            db_incs = None
            dblibs = []
            dblib_dir = None

        # The standard Unix dbm module:
        if platform not in ['cygwin']:
            if find_file("ndbm.h", inc_dirs, []) is not None:
                # Some systems have -lndbm, others don't
                if self.compiler.find_library_file(lib_dirs, 'ndbm'):
                    ndbm_libs = ['ndbm']
                else:
                    ndbm_libs = []
                exts.append( Extension('dbm', ['dbmmodule.c'],
                                       define_macros=[('HAVE_NDBM_H',None)],
                                       libraries = ndbm_libs ) )
            elif (self.compiler.find_library_file(lib_dirs, 'gdbm')
                  and find_file("gdbm/ndbm.h", inc_dirs, []) is not None):
                exts.append( Extension('dbm', ['dbmmodule.c'],
                                       define_macros=[('HAVE_GDBM_NDBM_H',None)],
                                       libraries = ['gdbm'] ) )
            elif db_incs is not None:
                exts.append( Extension('dbm', ['dbmmodule.c'],
                                       library_dirs=dblib_dir,
                                       runtime_library_dirs=dblib_dir,
                                       include_dirs=db_incs,
                                       define_macros=[('HAVE_BERKDB_H',None),
                                                      ('DB_DBM_HSEARCH',None)],
                                       libraries=dblibs))

        # Anthony Baxter's gdbm module.  GNU dbm(3) will require -lgdbm:
        if (self.compiler.find_library_file(lib_dirs, 'gdbm')):
            exts.append( Extension('gdbm', ['gdbmmodule.c'],
                                   libraries = ['gdbm'] ) )

        # The mpz module interfaces to the GNU Multiple Precision library.
        # You need to ftp the GNU MP library.
        # This was originally written and tested against GMP 1.2 and 1.3.2.
        # It has been modified by Rob Hooft to work with 2.0.2 as well, but I
        # haven't tested it recently, and it definitely doesn't work with
        # GMP 4.0.  For more complete modules, refer to
        # http://gmpy.sourceforge.net and
        # http://www.egenix.com/files/python/mxNumber.html

        # A compatible MP library unencumbered by the GPL also exists.  It was
        # posted to comp.sources.misc in volume 40 and is widely available from
        # FTP archive sites. One URL for it is:
        # ftp://gatekeeper.dec.com/.b/usenet/comp.sources.misc/volume40/fgmp/part01.Z

        if (self.compiler.find_library_file(lib_dirs, 'gmp')):
            exts.append( Extension('mpz', ['mpzmodule.c'],
                                   libraries = ['gmp'] ) )


        # Unix-only modules
        if platform not in ['mac', 'win32']:
            # Steen Lumholt's termios module
            exts.append( Extension('termios', ['termios.c']) )
            # Jeremy Hylton's rlimit interface
	    if platform not in ['atheos']:
                exts.append( Extension('resource', ['resource.c']) )

            # Sun yellow pages. Some systems have the functions in libc.
            if platform not in ['cygwin', 'atheos']:
                if (self.compiler.find_library_file(lib_dirs, 'nsl')):
                    libs = ['nsl']
                else:
                    libs = []
                exts.append( Extension('nis', ['nismodule.c'],
                                       libraries = libs) )

        # Curses support, requring the System V version of curses, often
        # provided by the ncurses library.
        if platform == 'sunos4':
            inc_dirs += ['/usr/5include']
            lib_dirs += ['/usr/5lib']

        if (self.compiler.find_library_file(lib_dirs, 'ncurses')):
            curses_libs = ['ncurses']
            exts.append( Extension('_curses', ['_cursesmodule.c'],
                                   libraries = curses_libs) )
        elif (self.compiler.find_library_file(lib_dirs, 'curses')
              and platform != 'darwin'):
                # OSX has an old Berkeley curses, not good enough for
                # the _curses module.
            if (self.compiler.find_library_file(lib_dirs, 'terminfo')):
                curses_libs = ['curses', 'terminfo']
            else:
                curses_libs = ['curses', 'termcap']

            exts.append( Extension('_curses', ['_cursesmodule.c'],
                                   libraries = curses_libs) )

        # If the curses module is enabled, check for the panel module
        if (module_enabled(exts, '_curses') and
            self.compiler.find_library_file(lib_dirs, 'panel')):
            exts.append( Extension('_curses_panel', ['_curses_panel.c'],
                                   libraries = ['panel'] + curses_libs) )


        # Andrew Kuchling's zlib module.  Note that some versions of zlib
        # 1.1.3 have security problems.  See CERT Advisory CA-2002-07:
        # http://www.cert.org/advisories/CA-2002-07.html
        #
        # zlib 1.1.4 is fixed, but at least one vendor (RedHat) has decided to
        # patch its zlib 1.1.3 package instead of upgrading to 1.1.4.  For
        # now, we still accept 1.1.3, because we think it's difficult to
        # exploit this in Python, and we'd rather make it RedHat's problem
        # than our problem <wink>.
        #
        # You can upgrade zlib to version 1.1.4 yourself by going to
        # http://www.gzip.org/zlib/
        zlib_inc = find_file('zlib.h', [], inc_dirs)
        if zlib_inc is not None:
            zlib_h = zlib_inc[0] + '/zlib.h'
            version = '"0.0.0"'
            version_req = '"1.1.3"'
            fp = open(zlib_h)
            while 1:
                line = fp.readline()
                if not line:
                    break
                if line.startswith('#define ZLIB_VERSION'):
                    version = line.split()[2]
                    break
            if version >= version_req:
                if (self.compiler.find_library_file(lib_dirs, 'z')):
                    exts.append( Extension('zlib', ['zlibmodule.c'],
                                           libraries = ['z']) )

        # Gustavo Niemeyer's bz2 module.
        if (self.compiler.find_library_file(lib_dirs, 'bz2')):
            exts.append( Extension('bz2', ['bz2module.c'],
                                   libraries = ['bz2']) )

        # Interface to the Expat XML parser
        #
        # Expat was written by James Clark and is now maintained by a
        # group of developers on SourceForge; see www.libexpat.org for
        # more information.  The pyexpat module was written by Paul
        # Prescod after a prototype by Jack Jansen.  Source of Expat
        # 1.95.2 is included in Modules/expat/.  Usage of a system
        # shared libexpat.so/expat.dll is not advised.
        #
        # More information on Expat can be found at www.libexpat.org.
        #
        if sys.byteorder == "little":
            xmlbo = "12"
        else:
            xmlbo = "21"
        expatinc = os.path.join(os.getcwd(), srcdir, 'Modules', 'expat')
        exts.append(Extension('pyexpat',
                              sources = [
            'pyexpat.c',
            'expat/xmlparse.c',
            'expat/xmlrole.c',
            'expat/xmltok.c',
            ],
                              define_macros = [
            ('HAVE_EXPAT_H',None),
            ('XML_NS', '1'),
            ('XML_DTD', '1'),
            ('XML_BYTE_ORDER', xmlbo),
            ('XML_CONTEXT_BYTES','1024'),
            ],
                              include_dirs = [expatinc]
                               ))                        

        # Dynamic loading module
        if sys.maxint == 0x7fffffff:
            # This requires sizeof(int) == sizeof(long) == sizeof(char*)
            dl_inc = find_file('dlfcn.h', [], inc_dirs)
            if (dl_inc is not None) and (platform not in ['atheos']):
                exts.append( Extension('dl', ['dlmodule.c']) )

        # Platform-specific libraries
        if platform == 'linux2':
            # Linux-specific modules
            exts.append( Extension('linuxaudiodev', ['linuxaudiodev.c']) )

        if platform == 'sunos5':
            # SunOS specific modules
            exts.append( Extension('sunaudiodev', ['sunaudiodev.c']) )

        if platform == 'darwin':
            # Mac OS X specific modules.
            exts.append( Extension('_CF', ['cf/_CFmodule.c', 'cf/pycfbridge.c'],
                        extra_link_args=['-framework', 'CoreFoundation']) )

            exts.append( Extension('gestalt', ['gestaltmodule.c'],
                        extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('MacOS', ['macosmodule.c'],
                        extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('icglue', ['icgluemodule.c'],
                        extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Res', ['res/_Resmodule.c'],
                        extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Snd', ['snd/_Sndmodule.c'],
                        extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('Nav', ['Nav.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_AE', ['ae/_AEmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_AH', ['ah/_AHmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_App', ['app/_Appmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_CarbonEvt', ['carbonevt/_CarbonEvtmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_CG', ['cg/_CGmodule.c'],
                    extra_link_args=['-framework', 'ApplicationServices',
                                     '-framework', 'Carbon']) )
            exts.append( Extension('_Cm', ['cm/_Cmmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Ctl', ['ctl/_Ctlmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Dlg', ['dlg/_Dlgmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Drag', ['drag/_Dragmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Evt', ['evt/_Evtmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_File', ['file/_Filemodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Folder', ['folder/_Foldermodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Fm', ['fm/_Fmmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Help', ['help/_Helpmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Icn', ['icn/_Icnmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_IBCarbon', ['ibcarbon/_IBCarbon.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_List', ['list/_Listmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Menu', ['menu/_Menumodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Mlte', ['mlte/_Mltemodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Qd', ['qd/_Qdmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Qdoffs', ['qdoffs/_Qdoffsmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_Qt', ['qt/_Qtmodule.c'],
                    extra_link_args=['-framework', 'QuickTime',
                                     '-framework', 'Carbon']) )
            exts.append( Extension('_Scrap', ['scrap/_Scrapmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            exts.append( Extension('_TE', ['te/_TEmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )
            # As there is no standardized place (yet) to put
            # user-installed Mac libraries on OSX, we search for "waste"
            # in parent directories of the Python source tree. You
            # should put a symlink to your Waste installation in the
            # same folder as your python source tree.  Or modify the
            # next few lines:-)
            waste_incs = find_file("WASTE.h", [], 
                    ['../'*n + 'waste/C_C++ Headers' for n in (0,1,2,3,4)])
            waste_libs = find_library_file(self.compiler, "WASTE", [],
                    ["../"*n + "waste/Static Libraries" for n in (0,1,2,3,4)])
            if waste_incs != None and waste_libs != None:
                (srcdir,) = sysconfig.get_config_vars('srcdir')
                exts.append( Extension('waste',
                               ['waste/wastemodule.c'] + [
                                os.path.join(srcdir, d) for d in 
                                'Mac/Wastemods/WEObjectHandlers.c',
                                'Mac/Wastemods/WETabHooks.c',
                                'Mac/Wastemods/WETabs.c'
                               ],
                               include_dirs = waste_incs + [os.path.join(srcdir, 'Mac/Wastemods')],
                               library_dirs = waste_libs,
                               libraries = ['WASTE'],
                               extra_link_args = ['-framework', 'Carbon'],
                ) )
            exts.append( Extension('_Win', ['win/_Winmodule.c'],
                    extra_link_args=['-framework', 'Carbon']) )

        self.extensions.extend(exts)

        # Call the method for detecting whether _tkinter can be compiled
        self.detect_tkinter(inc_dirs, lib_dirs)

    def detect_tkinter_darwin(self, inc_dirs, lib_dirs):
        # The _tkinter module, using frameworks. Since frameworks are quite
        # different the UNIX search logic is not sharable.
        from os.path import join, exists
        framework_dirs = [
            '/System/Library/Frameworks/', 
            '/Library/Frameworks', 
            join(os.getenv('HOME'), '/Library/Frameworks')
        ]

        # Find the directory that contains the Tcl.framwork and Tk.framework
        # bundles.
        # XXX distutils should support -F!
        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
                break
        else:
            # Tk and Tcl frameworks not found. Normal "unix" tkinter search
            # will now resume.
            return 0
                
        # 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. 
        #
        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...
        include_dirs.append('/usr/X11R6/include')
        frameworks = ['-framework', 'Tcl', '-framework', 'Tk']

        ext = Extension('_tkinter', ['_tkinter.c', 'tkappinit.c'],
                        define_macros=[('WITH_APPINIT', 1)],
                        include_dirs = include_dirs,
                        libraries = [],
                        extra_compile_args = frameworks,
                        extra_link_args = frameworks,
                        )
        self.extensions.append(ext)
        return 1

         
    def detect_tkinter(self, inc_dirs, lib_dirs):
        # The _tkinter module.

        # Rather than complicate the code below, detecting and building
        # AquaTk is a separate method. Only one Tkinter will be built on
        # Darwin - either AquaTk, if it is found, or X11 based Tk.
        platform = self.get_platform()
        if platform == 'darwin' and \
           self.detect_tkinter_darwin(inc_dirs, lib_dirs):
          return

        # Set platform specific library prefix, if any
        if platform == 'cygwin':
            lib_prefix = 'cyg'
        else:
            lib_prefix = ''

        # Assume we haven't found any of the libraries or include files
        # The versions with dots are used on Unix, and the versions without
        # dots on Windows, for detection by cygwin.
        tcllib = tklib = tcl_includes = tk_includes = None
        for version in ['8.4', '84', '8.3', '83', '8.2',
                        '82', '8.1', '81', '8.0', '80']:
            tklib = self.compiler.find_library_file(lib_dirs,
                                                    lib_prefix + 'tk' + version)
            tcllib = self.compiler.find_library_file(lib_dirs,
                                                     lib_prefix + 'tcl' + version)
            if tklib and tcllib:
                # Exit the loop when we've found the Tcl/Tk libraries
                break

        # Now check for the header files
        if tklib and tcllib:
            # Check for the include files on Debian, where
            # they're put in /usr/include/{tcl,tk}X.Y
            debian_tcl_include = [ '/usr/include/tcl' + version ]
            debian_tk_include =  [ '/usr/include/tk'  + version ] + \
                                 debian_tcl_include
            tcl_includes = find_file('tcl.h', inc_dirs, debian_tcl_include)
            tk_includes = find_file('tk.h', inc_dirs, debian_tk_include)

        if (tcllib is None or tklib is None and
            tcl_includes is None or tk_includes is None):
            # Something's missing, so give up
            return

        # OK... everything seems to be present for Tcl/Tk.

        include_dirs = [] ; libs = [] ; defs = [] ; added_lib_dirs = []
        for dir in tcl_includes + tk_includes:
            if dir not in include_dirs:
                include_dirs.append(dir)

        # Check for various platform-specific directories
        if platform == 'sunos5':
            include_dirs.append('/usr/openwin/include')
            added_lib_dirs.append('/usr/openwin/lib')
        elif platform == 'cygwin':
            # Verify that the pseudo-X headers are installed before proceeding
            x11_inc = find_file('X11/Xlib.h', [], inc_dirs)
            if x11_inc is None:
                return
        elif os.path.exists('/usr/X11R6/include'):
            include_dirs.append('/usr/X11R6/include')
            added_lib_dirs.append('/usr/X11R6/lib')
        elif os.path.exists('/usr/X11R5/include'):
            include_dirs.append('/usr/X11R5/include')
            added_lib_dirs.append('/usr/X11R5/lib')
        else:
            # Assume default location for X11
            include_dirs.append('/usr/X11/include')
            added_lib_dirs.append('/usr/X11/lib')

        # Check for BLT extension
        if self.compiler.find_library_file(lib_dirs + added_lib_dirs,
                                           'BLT8.0'):
            defs.append( ('WITH_BLT', 1) )
            libs.append('BLT8.0')
        elif self.compiler.find_library_file(lib_dirs + added_lib_dirs,
                                           'BLT'):
            defs.append( ('WITH_BLT', 1) )
            libs.append('BLT')

        # Add the Tcl/Tk libraries
        libs.append(lib_prefix + 'tk'+ version)
        libs.append(lib_prefix + 'tcl'+ version)

        if platform in ['aix3', 'aix4']:
            libs.append('ld')

        # Finally, link with the X11 libraries (not appropriate on cygwin)
        if platform != "cygwin":
            libs.append('X11')

        ext = Extension('_tkinter', ['_tkinter.c', 'tkappinit.c'],
                        define_macros=[('WITH_APPINIT', 1)] + defs,
                        include_dirs = include_dirs,
                        libraries = libs,
                        library_dirs = added_lib_dirs,
                        )
        self.extensions.append(ext)

        # XXX handle these, but how to detect?
        # *** Uncomment and edit for PIL (TkImaging) extension only:
        #       -DWITH_PIL -I../Extensions/Imaging/libImaging  tkImaging.c \
        # *** Uncomment and edit for TOGL extension only:
        #       -DWITH_TOGL togl.c \
        # *** Uncomment these for TOGL extension only:
        #       -lGL -lGLU -lXext -lXmu \

class PyBuildInstall(install):
    # Suppress the warning about installation into the lib_dynload
    # directory, which is not in sys.path when running Python during
    # installation:
    def initialize_options (self):
        install.initialize_options(self)
        self.warn_dir=0

class PyBuildInstallLib(install_lib):
    # Do exactly what install_lib does but make sure correct access modes get
    # set on installed directories and files. All installed files with get
    # mode 644 unless they are a shared library in which case they will get
    # mode 755. All installed directories will get mode 755.

    so_ext = sysconfig.get_config_var("SO")

    def install(self):
        outfiles = install_lib.install(self)
        self.set_file_modes(outfiles, 0644, 0755)
        self.set_dir_modes(self.install_dir, 0755)
        return outfiles

    def set_file_modes(self, files, defaultMode, sharedLibMode):
        if not self.is_chmod_supported(): return
        if not files: return

        for filename in files:
            if os.path.islink(filename): continue
            mode = defaultMode
            if filename.endswith(self.so_ext): mode = sharedLibMode
            log.info("changing mode of %s to %o", filename, mode)
            if not self.dry_run: os.chmod(filename, mode)

    def set_dir_modes(self, dirname, mode):
        if not self.is_chmod_supported(): return
        os.path.walk(dirname, self.set_dir_modes_visitor, mode)

    def set_dir_modes_visitor(self, mode, dirname, names):
        if os.path.islink(dirname): return
        log.info("changing mode of %s to %o", dirname, mode)
        if not self.dry_run: os.chmod(dirname, mode)

    def is_chmod_supported(self):
        return hasattr(os, 'chmod')

def main():
    # turn off warnings when deprecated modules are imported
    import warnings
    warnings.filterwarnings("ignore",category=DeprecationWarning)
    setup(name = 'Python standard library',
          version = '%d.%d' % sys.version_info[:2],
          cmdclass = {'build_ext':PyBuildExt, 'install':PyBuildInstall,
                      'install_lib':PyBuildInstallLib},
          # The struct module is defined here, because build_ext won't be
          # called unless there's at least one extension module defined.
          ext_modules=[Extension('struct', ['structmodule.c'])],

          # Scripts to install
          scripts = ['Tools/scripts/pydoc']
        )

# --install-platlib
if __name__ == '__main__':
    main()