[Patch #102588/PEP 229]:

   Check in the setup.py script, and the setup.cfg.in file, which
   handle compiling and installing as many extension modules as possible

setup.cfg.in

+
+[install]
+install_platlib = @prefix@/lib/python@VERSION@/lib-dynload
\ No newline at end of file

setup.py

+# To be fixed:
+#   Implement --disable-modules setting
+#   Don't install to site-packages, but to lib-dynload
+            
+import sys, os, string, getopt
+from distutils import sysconfig
+from distutils.core import Extension, setup
+from distutils.command.build_ext import build_ext
+
+# This global variable is used to hold the list of modules to be disabled.
+disabled_module_list = []
+
+def find_file(path, filename):
+    for p in path:
+        fullpath = p + os.sep + filename
+        if os.path.exists(fullpath):
+            return fullpath
+    return None
+
+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)
+               
+class PyBuildExt(build_ext):
+    
+    def build_extensions(self):
+        from distutils.ccompiler import new_compiler
+        from distutils.sysconfig import customize_compiler
+
+        # 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')
+
+        # 
+        moddir = os.path.join(os.getcwd(), 'Modules', srcdir)
+        moddir = os.path.normpath(moddir)
+        srcdir, tail = os.path.split(moddir)
+        srcdir = os.path.normpath(srcdir)
+        moddir = os.path.normpath(moddir)
+
+        for ext in self.extensions:
+            ext.sources = [ os.path.join(moddir, filename)
+                            for filename in ext.sources ]
+            ext.include_dirs.append( '.' ) # to get config.h
+            ext.include_dirs.append( os.path.join(srcdir, './Include') )
+            
+        # If the signal module is being compiled, remove the sigcheck.o and
+        # intrcheck.o object files from the archive.
+        if module_enabled(self.extensions, 'signal'):
+            print 'removing sigcheck.o intrcheck.o'
+            ar, library = sysconfig.get_config_vars('AR', 'LIBRARY')
+            cmd = '%s d Modules/%s sigcheck.o intrcheck.o' % (ar, library)
+#            os.system(cmd)
+            
+        build_ext.build_extensions(self)
+
+    def detect_modules(self):
+        # XXX this always gets an empty list -- hardwiring to
+        # a fixed list
+        lib_dirs = self.compiler.library_dirs[:]
+        lib_dirs += ['/lib', '/usr/lib', '/usr/local/lib']
+#        std_lib_dirs = ['/lib', '/usr/lib']
+        exts = []
+
+        # 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('signal', ['signalmodule.c']) )
+        
+        # XXX uncomment this with 2.0CVS
+        #exts.append( Extension('xreadlines', ['xreadlines.c']) )
+
+        # array objects
+        exts.append( Extension('array', ['arraymodule.c']) )
+        # complex math library functions
+        exts.append( Extension('cmath', ['cmathmodule.c'], libraries=['m']) )
+        # math library functions, e.g. sin()
+        exts.append( Extension('math',  ['mathmodule.c'], libraries=['m']) )
+        # fast string operations implemented in C
+        exts.append( Extension('strop', ['stropmodule.c']) )
+        # time operations and variables
+        exts.append( Extension('time', ['timemodule.c'], libraries=['m']) )
+        # operator.add() and similar goodies
+        exts.append( Extension('operator', ['operator.c']) )
+        # access to the builtin codecs and codec registry
+        exts.append( Extension('_codecs', ['_codecsmodule.c']) )
+        # static Unicode character database
+        exts.append( Extension('unicodedata', ['unicodedata.c', 'unicodedatabase.c']) )
+        # Unicode Character Name expansion hash table
+        exts.append( Extension('ucnhash', ['ucnhash.c']) )
+        # access to ISO C locale support
+        exts.append( Extension('_locale', ['_localemodule.c']) )
+
+        # 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']) )
+        # pwd(3)
+        exts.append( Extension('pwd', ['pwdmodule.c']) )
+        # grp(3)
+        exts.append( Extension('grp', ['grpmodule.c']) )
+        # posix (UNIX) errno values
+        exts.append( Extension('errno', ['errnomodule.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']) )
+
+        # Tommy Burnette's 'new' module (creates new empty objects of certain kinds):
+        exts.append( Extension('new', ['newmodule.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']) )
+
+        # Digital Creations' cStringIO and cPickle
+        exts.append( Extension('cStringIO', ['cStringIO.c']) )
+        exts.append( Extension('cPickle', ['cPickle.c']) )
+
+        # Memory-mapped files (also works on Win32).
+        exts.append( Extension('mmap', ['mmapmodule.c']) )
+
+        # Lance Ellinghaus's modules:
+        # enigma-inspired encryption
+        exts.append( Extension('rotor', ['rotormodule.c']) )
+        # 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(self.compiler.library_dirs, 'readline')):
+            exts.append( Extension('readline', ['readline.c'],
+                                   libraries=['readline', 'termcap']) )
+
+        # The crypt module is now disabled by default because it breaks builds
+        # on many systems (where -lcrypt is needed), e.g. Linux (I believe).
+
+        if self.compiler.find_library_file(lib_dirs, 'crypt'):
+            libs = ['crypt']
+        else:
+            libs = []
+        exts.append( Extension('crypt', ['cryptmodule.c'], libraries=libs) )
+
+        # socket(2)
+        # Detect SSL support for the socket module
+        if (self.compiler.find_library_file(lib_dirs, 'ssl') and
+            self.compiler.find_library_file(lib_dirs, 'crypto') ):
+            exts.append( Extension('_socket', ['socketmodule.c'],
+                                   libraries = ['ssl', 'crypto'],
+                                   define_macros = [('USE_SSL',1)] ) )
+        else:
+            exts.append( Extension('_socket', ['socketmodule.c']) )
+
+        # 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.
+
+        # The standard Unix dbm module:
+        if (self.compiler.find_library_file(lib_dirs, 'ndbm')):
+            exts.append( Extension('dbm', ['dbmmodule.c'],
+                                   libraries = ['ndbm'] ) )
+        else:
+            exts.append( Extension('dbm', ['dbmmodule.c']) )
+        
+        # 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'] ) )
+
+        # Berkeley DB interface.
+        #
+        # This requires the Berkeley DB code, see
+        # ftp://ftp.cs.berkeley.edu/pub/4bsd/db.1.85.tar.gz
+        #
+        # Edit the variables DB and DBPORT to point to the db top directory
+        # and the subdirectory of PORT where you built it.
+        #
+        # (See http://electricrain.com/greg/python/bsddb3/ for an interface to
+        # BSD DB 3.x.)
+
+        # Note: If a db.h file is found by configure, bsddb will be enabled
+        # automatically via Setup.config.in.  It only needs to be enabled here
+        # if it is not automatically enabled there; check the generated
+        # Setup.config before enabling it here.
+
+        if (self.compiler.find_library_file(lib_dirs, 'db') and
+            find_file(['/usr/include', '/usr/local/include'] + self.include_dirs,
+                      'db_185.h') ):
+            exts.append( Extension('bsddb', ['bsddbmodule.c'],
+                                   libraries = ['db'] ) )
+
+        # 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.   For a more complete module,
+        # refer to pympz.sourceforge.net.
+
+        # A compatible MP library unencombered 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
+
+        # Anthony Baxter's gdbm module.  GNU dbm(3) will require -lgdbm:
+        if (self.compiler.find_library_file(lib_dirs, 'gmp')):
+            exts.append( Extension('mpz', ['mpzmodule.c'],
+                                   libraries = ['gmp'] ) )
+
+
+        # Unix-only modules
+        if sys.platform not in ['mac', 'win32']:
+            # Steen Lumholt's termios module
+            exts.append( Extension('termios', ['termios.c']) )
+            # Jeremy Hylton's rlimit interface
+            exts.append( Extension('resource', ['resource.c']) )
+
+            if (self.compiler.find_library_file(lib_dirs, 'nsl')):
+                exts.append( Extension('nis', ['nismodule.c'],
+                                       libraries = ['nsl']) )
+
+        # Curses support, requring the System V version of curses, often
+        # provided by the ncurses library. 
+        if sys.platform == 'sunos4':
+            include_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')):
+            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 (os.path.exists('Modules/_curses_panel.c') and
+            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) )
+            
+            
+
+        # Lee Busby's SIGFPE modules.
+        # The library to link fpectl with is platform specific.
+        # Choose *one* of the options below for fpectl:
+
+        if sys.platform == 'irix5':
+            # For SGI IRIX (tested on 5.3):
+            exts.append( Extension('fpectl', ['fpectlmodule.c'],
+                                   libraries=['fpe']) )
+        elif 0: # XXX
+            # For Solaris with SunPro compiler (tested on Solaris 2.5 with SunPro C 4.2):
+            # (Without the compiler you don't have -lsunmath.)
+            #fpectl fpectlmodule.c -R/opt/SUNWspro/lib -lsunmath -lm
+            pass
+        else:
+            # For other systems: see instructions in fpectlmodule.c.
+            #fpectl fpectlmodule.c ...
+            exts.append( Extension('fpectl', ['fpectlmodule.c']) )
+
+
+        # Andrew Kuchling's zlib module.
+        # This require zlib 1.1.3 (or later).
+        # See http://www.cdrom.com/pub/infozip/zlib/
+        if (self.compiler.find_library_file(lib_dirs, 'z')):
+            exts.append( Extension('zlib', ['zlibmodule.c'],
+                                   libraries = ['z']) )
+
+        # Interface to the Expat XML parser
+        #
+        # Expat is written by James Clark and must be downloaded separately
+        # (see below).  The pyexpat module was written by Paul Prescod after a
+        # prototype by Jack Jansen.
+        #
+        # The Expat dist includes Windows .lib and .dll files.  Home page is at
+        # http://www.jclark.com/xml/expat.html, the current production release is
+        # always ftp://ftp.jclark.com/pub/xml/expat.zip.
+        #
+        # EXPAT_DIR, below, should point to the expat/ directory created by
+        # unpacking the Expat source distribution.
+        #
+        # Note: the expat build process doesn't yet build a libexpat.a; you can
+        # do this manually while we try convince the author to add it.  To do so,
+        # cd to EXPAT_DIR, run "make" if you have not done so, then run:
+        #
+        #    ar cr libexpat.a xmltok/*.o xmlparse/*.o
+        #
+        if (self.compiler.find_library_file(lib_dirs, 'expat')):
+            exts.append( Extension('pyexpat', ['pyexpat.c'],
+                                   libraries = ['expat']) )
+
+        # Platform-specific libraries
+        plat = sys.platform
+        if plat == 'linux2':
+            # Linux-specific modules
+            exts.append( Extension('linuxaudiodev', ['linuxaudiodev.c']) )
+
+        if plat == 'sunos5':
+            # SunOS specific modules 
+            exts.append( Extension('sunaudiodev', ['sunaudiodev.c']) )
+
+        # The _tkinter module.
+        #
+        # The command for _tkinter is long and site specific.  Please
+        # uncomment and/or edit those parts as indicated.  If you don't have a
+        # specific extension (e.g. Tix or BLT), leave the corresponding line
+        # commented out.  (Leave the trailing backslashes in!  If you
+        # experience strange errors, you may want to join all uncommented
+        # lines and remove the backslashes -- the backslash interpretation is
+        # done by the shell's "read" command and it may not be implemented on
+        # every system.
+
+        # XXX need to add the old 7.x/4.x unsynced version numbers here
+        for tcl_version, tk_version in [('8.4', '8.4'),
+                                        ('8.3', '8.3'),
+                                        ('8.2', '8.2'),
+                                        ('8.1', '8.1'),
+                                        ('8.0', '8.0')]:
+            tklib = self.compiler.find_library_file(lib_dirs,
+                                                    'tk' + tk_version )
+            tcllib = self.compiler.find_library_file(lib_dirs,
+                                                     'tcl' + tcl_version )
+            if tklib and tcllib:
+                # Exit the loop when we've found the Tcl/Tk libraries
+                break
+            
+        if (tcllib and tklib):
+            include_dirs = [] ; libs = [] ; defs = [] ; added_lib_dirs = []
+
+            # Determine the prefix where Tcl/Tk is installed by
+            # chopping off the 'lib' suffix.
+            prefix = os.path.dirname(tcllib)
+            L = string.split(prefix, os.sep)
+            if L[-1] == 'lib': del L[-1]
+            prefix = string.join(L, os.sep)
+
+            if prefix + os.sep + 'lib' not in lib_dirs:
+                added_lib_dirs.append( prefix + os.sep + 'lib')
+
+                # Check for the include files on Debian, where
+                # they're put in /usr/include/{tcl,tk}X.Y
+                # XXX currently untested
+                debian_tcl_include = ( prefix + os.sep + 'include/tcl' +
+                                       tcl_version )
+                debian_tk_include = ( prefix + os.sep + 'include/tk' +
+                                       tk_version )
+                if os.path.exists(debian_tcl_include):
+                    include_dirs = [debian_tcl_include, debian_tk_include]
+                else:
+                    # Fallback for non-Debian systems
+                    include_dirs = [prefix + os.sep + 'include']
+
+            # Check for various platform-specific directories
+            if sys.platform == 'sunos5':
+                include_dirs.append('/usr/openwin/include')
+                added_lib_dirs.append('/usr/openwin/lib')
+            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 form
+                include_dirs.append('/usr/X11/include')
+                added_lib_dirs.append('/usr/X11/lib')
+
+            if self.compiler.find_library_file(lib_dirs + added_lib_dirs, 'tix4.1.8.0'):
+                defs.append( ('WITH_TIX', 1) )
+                libs.append('tix4.1.8.0')
+
+            if self.compiler.find_library_file(lib_dirs + added_lib_dirs, 'BLT8.0'):
+                defs.append( ('WITH_BLT', 1) )
+                libs.append('BLT8.0')
+
+            if sys.platform in ['aix3', 'aix4']:
+                libs.append('ld')
+
+            # X11 libraries to link with:
+            libs.append('X11')
+
+            tklib, ext = os.path.splitext(tklib)
+            tcllib, ext = os.path.splitext(tcllib)
+            tklib = os.path.basename(tklib)
+            tcllib = os.path.basename(tcllib)
+            libs.append( tklib[3:] )    # Chop off 'lib' prefix
+            libs.append( tcllib[3:] )
+            
+            exts.append( Extension('_tkinter', ['_tkinter.c', 'tkappinit.c'],
+                                   define_macros=[('WITH_APPINIT', 1)] + defs,
+                                   include_dirs = include_dirs,
+                                   libraries = libs,
+                                   library_dirs = added_lib_dirs,
+                                   )
+                         )
+        # XXX handle these
+        # *** 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 \
+
+        self.extensions = exts
+
+def main():
+    setup(name = 'Python standard library',
+          version = '2.0',
+          cmdclass = {'build_ext':PyBuildExt},
+          # 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'])]
+        )
+          
+# --install-platlib
+if __name__ == '__main__':
+    sysconfig.set_python_build()
+    main()
+