add fix from python upstream to allow host build on ubuntu

2 files changed, 2079 insertions, 0 deletions

diff --git a/package/python2/Makefile b/package/python2/Makefile
index 6ab804935..53e770f2d 100644
--- a/package/python2/Makefile
+++ b/package/python2/Makefile
@@ -42,6 +42,8 @@ CONFIGURE_ARGS:=	--with-threads \
 			--without-cxx-main
 
 post-extract:
+	$(CP) ${WRKBUILD}/setup.py ${WRKBUILD}/setup.py.sav
+	$(CP) ./files/setup.py ${WRKBUILD}/setup.py
 	$(CP) ./files/posixmodule.c ${WRKBUILD}/Modules/posixmodule.c
 	$(CP) ./files/python-config.in ${WRKBUILD}/Misc/python-config.in
 	(cd ${WRKBUILD}; rm -rf config.{cache,status} ; \
@@ -56,6 +58,7 @@ post-extract:
 	${CP} ${WRKBUILD}/Parser/pgen ${WRKBUILD}/Parser/hostpgen
 	${CP} ${WRKBUILD}/python ${WRKBUILD}/hostpython
 	$(MAKE) -C ${WRKBUILD} distclean
+	$(CP) ${WRKBUILD}/setup.py.sav ${WRKBUILD}/setup.py
 
 pre-configure:
 	$(SED) "s#@@CPU_ARCH@@#$(CPU_ARCH)#" ${WRKBUILD}/configure
diff --git a/package/python2/files/setup.py b/package/python2/files/setup.py
new file mode 100644
index 000000000..baf694e16
--- /dev/null
+++ b/package/python2/files/setup.py
@@ -0,0 +1,2076 @@
+# Autodetecting setup.py script for building the Python extensions
+#
+
+__version__ = "$Revision: 86041 $"
+
+import sys, os, imp, re, optparse
+from glob import glob
+from platform import machine as platform_machine
+import sysconfig
+
+from distutils import log
+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
+from distutils.spawn import find_executable
+
+# Were we compiled --with-pydebug or with #define Py_DEBUG?
+COMPILED_WITH_PYDEBUG = hasattr(sys, 'gettotalrefcount')
+
+# 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 macosx_sdk_root():
+    """
+    Return the directory of the current OSX SDK,
+    or '/' if no SDK was specified.
+    """
+    cflags = sysconfig.get_config_var('CFLAGS')
+    m = re.search(r'-isysroot\s+(\S+)', cflags)
+    if m is None:
+        sysroot = '/'
+    else:
+        sysroot = m.group(1)
+    return sysroot
+
+def is_macosx_sdk_path(path):
+    """
+    Returns True if 'path' can be located in an OSX SDK
+    """
+    return (path.startswith('/usr/') and not path.startswith('/usr/local')) or path.startswith('/System/')
+
+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.
+    """
+    if sys.platform == 'darwin':
+        # Honor the MacOSX SDK setting when one was specified.
+        # An SDK is a directory with the same structure as a real
+        # system, but with only header files and libraries.
+        sysroot = macosx_sdk_root()
+
+    # Check the standard locations
+    for dir in std_dirs:
+        f = os.path.join(dir, filename)
+
+        if sys.platform == 'darwin' and is_macosx_sdk_path(dir):
+            f = os.path.join(sysroot, dir[1:], filename)
+
+        if os.path.exists(f): return []
+
+    # Check the additional directories
+    for dir in paths:
+        f = os.path.join(dir, filename)
+
+        if sys.platform == 'darwin' and is_macosx_sdk_path(dir):
+            f = os.path.join(sysroot, dir[1:], 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
+
+    if sys.platform == 'darwin':
+        sysroot = macosx_sdk_root()
+
+    # 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
+        p = p.rstrip(os.sep)
+
+        if sys.platform == 'darwin' and is_macosx_sdk_path(p):
+            if os.path.join(sysroot, p[1:]) == dirname:
+                return [ ]
+
+        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
+        p = p.rstrip(os.sep)
+
+        if sys.platform == 'darwin' and is_macosx_sdk_path(p):
+            if os.path.join(sysroot, p[1:]) == dirname:
+                return [ p ]
+
+        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:
+        log.info("WARNING: multiple copies of %s found"%module)
+    return os.path.join(list[0], module)
+
+class PyBuildExt(build_ext):
+
+    def __init__(self, dist):
+        build_ext.__init__(self, dist)
+        self.failed = []
+
+    def build_extensions(self):
+
+        # Detect which modules should be compiled
+        missing = self.detect_modules()
+
+        # Remove modules that are present on the disabled list
+        extensions = [ext for ext in self.extensions
+                      if ext.name not in disabled_module_list]
+        # move ctypes to the end, it depends on other modules
+        ext_map = dict((ext.name, i) for i, ext in enumerate(extensions))
+        if "_ctypes" in ext_map:
+            ctypes = extensions.pop(ext_map["_ctypes"])
+            extensions.append(ctypes)
+        self.extensions = extensions
+
+        # 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.")
+        srcdir = os.path.abspath(srcdir)
+        moddirlist = [os.path.join(srcdir, 'Modules')]
+
+        # Platform-dependent module source and include directories
+        incdirlist = []
+        platform = self.get_platform()
+        if platform == 'darwin' and ("--disable-toolbox-glue" not in
+            sysconfig.get_config_var("CONFIG_ARGS")):
+            # Mac OS X also includes some mac-specific modules
+            macmoddir = os.path.join(srcdir, 'Mac/Modules')
+            moddirlist.append(macmoddir)
+            incdirlist.append(os.path.join(srcdir, 'Mac/Include'))
+
+        # Fix up the paths for scripts, too
+        self.distribution.scripts = [os.path.join(srcdir, filename)
+                                     for filename in self.distribution.scripts]
+
+        # Python header files
+        headers = [sysconfig.get_config_h_filename()]
+        headers += glob(os.path.join(sysconfig.get_path('platinclude'), "*.h"))
+        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, moddirlist)
+                               for filename in ext.depends]
+            else:
+                ext.depends = []
+            # re-compile extensions if a header file has been changed
+            ext.depends.extend(headers)
+
+            # platform specific include directories
+            ext.include_dirs.extend(incdirlist)
+
+            # 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)
+
+        # Parse Modules/Setup and Modules/Setup.local to figure out which
+        # modules are turned on in the file.
+        remove_modules = []
+        for filename in ('Modules/Setup', 'Modules/Setup.local'):
+            input = text_file.TextFile(filename, join_lines=1)
+            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')
+        args = {}
+        # unfortunately, distutils doesn't let us provide separate C and C++
+        # compilers
+        if compiler is not None:
+            (ccshared,cflags) = sysconfig.get_config_vars('CCSHARED','CFLAGS')
+            args['compiler_so'] = compiler + ' ' + ccshared + ' ' + cflags
+        self.compiler.set_executables(**args)
+
+        build_ext.build_extensions(self)
+
+        longest = max([len(e.name) for e in self.extensions])
+        if self.failed:
+            longest = max(longest, max([len(name) for name in self.failed]))
+
+        def print_three_column(lst):
+            lst.sort(key=str.lower)
+            # guarantee zip() doesn't drop anything
+            while len(lst) % 3:
+                lst.append("")
+            for e, f, g in zip(lst[::3], lst[1::3], lst[2::3]):
+                print "%-*s   %-*s   %-*s" % (longest, e, longest, f,
+                                              longest, g)
+
+        if missing:
+            print
+            print ("Python build finished, but the necessary bits to build "
+                   "these modules were not found:")
+            print_three_column(missing)
+            print ("To find the necessary bits, look in setup.py in"
+                   " detect_modules() for the module's name.")
+            print
+
+        if self.failed:
+            failed = self.failed[:]
+            print
+            print "Failed to build these modules:"
+            print_three_column(failed)
+            print
+
+    def build_extension(self, ext):
+
+        if ext.name == '_ctypes':
+            if not self.configure_ctypes(ext):
+                return
+
+        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]))
+            self.failed.append(ext.name)
+            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
+
+        if self.get_platform() == 'darwin' and (
+                sys.maxint > 2**32 and '-arch' in ext.extra_link_args):
+            # Don't bother doing an import check when an extension was
+            # build with an explicit '-arch' flag on OSX. That's currently
+            # only used to build 32-bit only extensions in a 4-way
+            # universal build and loading 32-bit code into a 64-bit
+            # process will fail.
+            self.announce(
+                'WARNING: skipping import check for "%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:
+            self.failed.append(ext.name)
+            self.announce('*** WARNING: renaming "%s" since importing it'
+                          ' failed: %s' % (ext.name, why), level=3)
+            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)')
+        except:
+            exc_type, why, tb = sys.exc_info()
+            self.announce('*** WARNING: importing extension "%s" '
+                          'failed with %s: %s' % (ext.name, exc_type, why),
+                          level=3)
+            self.failed.append(ext.name)
+
+    def get_platform(self):
+        # Get value of sys.platform
+        for platform in ['cygwin', 'beos', 'darwin', 'atheos', 'osf1']:
+            if sys.platform.startswith(platform):
+                return platform
+        return sys.platform
+
+    def add_multiarch_paths(self):
+        # Debian/Ubuntu multiarch support.
+        # https://wiki.ubuntu.com/MultiarchSpec
+        if not find_executable('dpkg-architecture'):
+            return
+        tmpfile = os.path.join(self.build_temp, 'multiarch')
+        if not os.path.exists(self.build_temp):
+            os.makedirs(self.build_temp)
+        ret = os.system(
+            'dpkg-architecture -qDEB_HOST_MULTIARCH > %s 2> /dev/null' %
+            tmpfile)
+        try:
+            if ret >> 8 == 0:
+                with open(tmpfile) as fp:
+                    multiarch_path_component = fp.readline().strip()
+                add_dir_to_list(self.compiler.library_dirs,
+                                '/usr/lib/' + multiarch_path_component)
+                add_dir_to_list(self.compiler.include_dirs,
+                                '/usr/include/' + multiarch_path_component)
+        finally:
+            os.unlink(tmpfile)
+
+    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')
+	self.add_multiarch_paths()
+
+        # Add paths specified in the environment variables LDFLAGS and
+        # CPPFLAGS for header and library files.
+        # We must get the values from the Makefile and not the environment
+        # directly since an inconsistently reproducible issue comes up where
+        # the environment variable is not set even though the value were passed
+        # into configure and stored in the Makefile (issue found on OS X 10.3).
+        for env_var, arg_name, dir_list in (
+                ('LDFLAGS', '-R', self.compiler.runtime_library_dirs),
+                ('LDFLAGS', '-L', self.compiler.library_dirs),
+                ('CPPFLAGS', '-I', self.compiler.include_dirs)):
+            env_val = sysconfig.get_config_var(env_var)
+            if env_val:
+                # To prevent optparse from raising an exception about any
+                # options in env_val that it doesn't know about we strip out
+                # all double dashes and any dashes followed by a character
+                # that is not for the option we are dealing with.
+                #
+                # Please note that order of the regex is important!  We must
+                # strip out double-dashes first so that we don't end up with
+                # substituting "--Long" to "-Long" and thus lead to "ong" being
+                # used for a library directory.
+                env_val = re.sub(r'(^|\s+)-(-|(?!%s))' % arg_name[1],
+                                 ' ', env_val)
+                parser = optparse.OptionParser()
+                # Make sure that allowing args interspersed with options is
+                # allowed
+                parser.allow_interspersed_args = True
+                parser.error = lambda msg: None
+                parser.add_option(arg_name, dest="dirs", action="append")
+                options = parser.parse_args(env_val.split())[0]
+                if options.dirs:
+                    for directory in reversed(options.dirs):
+                        add_dir_to_list(dir_list, directory)
+
+        if os.path.normpath(sys.prefix) != '/usr' \
+                and not sysconfig.get_config_var('PYTHONFRAMEWORK'):
+            # OSX note: Don't add LIBDIR and INCLUDEDIR to building a framework
+            # (PYTHONFRAMEWORK is set) to avoid # linking problems when
+            # building a framework with different architectures than
+            # the one that is currently installed (issue #7473)
+            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 + [
+            '/lib64', '/usr/lib64',
+            '/lib', '/usr/lib',
+            ]
+        inc_dirs = self.compiler.include_dirs + ['/usr/include']
+        exts = []
+        missing = []
+
+        config_h = sysconfig.get_config_h_filename()
+        config_h_vars = sysconfig.parse_config_h(open(config_h))
+
+        platform = self.get_platform()
+        srcdir = sysconfig.get_config_var('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)
+
+        # OSF/1 and Unixware have some stuff in /usr/ccs/lib (like -ldb)
+        if platform in ['osf1', 'unixware7', 'openunix8']:
+            lib_dirs += ['/usr/ccs/lib']
+
+        if platform == 'darwin':
+            # This should work on any unixy platform ;-)
+            # If the user has bothered specifying additional -I and -L flags
+            # in OPT and LDFLAGS we might as well use them here.
+            #   NOTE: using shlex.split would technically be more correct, but
+            # also gives a bootstrap problem. Let's hope nobody uses directories
+            # with whitespace in the name to store libraries.
+            cflags, ldflags = sysconfig.get_config_vars(
+                    'CFLAGS', 'LDFLAGS')
+            for item in cflags.split():
+                if item.startswith('-I'):
+                    inc_dirs.append(item[2:])
+
+            for item in ldflags.split():
+                if item.startswith('-L'):
+                    lib_dirs.append(item[2:])
+
+        # Check for MacOS X, which doesn't need libm.a at all
+        math_libs = ['m']
+        if platform in ['darwin', 'beos']:
+            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('_weakref', ['_weakref.c']) )
+
+        # array objects
+        exts.append( Extension('array', ['arraymodule.c']) )
+        # complex math library functions
+        exts.append( Extension('cmath', ['cmathmodule.c', '_math.c'],
+                               depends=['_math.h'],
+                               libraries=math_libs) )
+        # math library functions, e.g. sin()
+        exts.append( Extension('math',  ['mathmodule.c', '_math.c'],
+                               depends=['_math.h'],
+                               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', 'timemodule.c'],
+                               libraries=math_libs) )
+        # fast iterator tools implemented in C
+        exts.append( Extension("itertools", ["itertoolsmodule.c"]) )
+        # code that will be builtins in the future, but conflict with the
+        #  current builtins
+        exts.append( Extension('future_builtins', ['future_builtins.c']) )
+        # random number generator implemented in C
+        exts.append( Extension("_random", ["_randommodule.c"]) )
+        # high-performance collections
+        exts.append( Extension("_collections", ["_collectionsmodule.c"]) )
+        # bisect
+        exts.append( Extension("_bisect", ["_bisectmodule.c"]) )
+        # heapq
+        exts.append( Extension("_heapq", ["_heapqmodule.c"]) )
+        # operator.add() and similar goodies
+        exts.append( Extension('operator', ['operator.c']) )
+        # Python 3.1 _io library
+        exts.append( Extension("_io",
+            ["_io/bufferedio.c", "_io/bytesio.c", "_io/fileio.c",
+             "_io/iobase.c", "_io/_iomodule.c", "_io/stringio.c", "_io/textio.c"],
+             depends=["_io/_iomodule.h"], include_dirs=["Modules/_io"]))
+        # _functools
+        exts.append( Extension("_functools", ["_functoolsmodule.c"]) )
+        # _json speedups
+        exts.append( Extension("_json", ["_json.c"]) )
+        # Python C API test module
+        exts.append( Extension('_testcapi', ['_testcapimodule.c'],
+                               depends=['testcapi_long.h']) )
+        # profilers (_lsprof is for cProfile.py)
+        exts.append( Extension('_hotshot', ['_hotshot.c']) )
+        exts.append( Extension('_lsprof', ['_lsprof.c', 'rotatingtree.c']) )
+        # static Unicode character database
+        if have_unicode:
+            exts.append( Extension('unicodedata', ['unicodedata.c']) )
+        else:
+            missing.append('unicodedata')
+        # access to ISO C locale support
+        data = open('pyconfig.h').read()
+        m = re.search(r"#s*define\s+WITH_LIBINTL\s+1\s*", data)
+        if m is not None:
+            locale_libs = ['intl']
+        else:
+            locale_libs = []
+        if platform == 'darwin':
+            locale_extra_link_args = ['-framework', 'CoreFoundation']
+        else:
+            locale_extra_link_args = []
+
+
+        exts.append( Extension('_locale', ['_localemodule.c'],
+                               libraries=locale_libs,
+                               extra_link_args=locale_extra_link_args) )
+
+        # 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)
+        libs = []
+        if (config_h_vars.get('FLOCK_NEEDS_LIBBSD', False)):
+            # May be necessary on AIX for flock function
+            libs = ['bsd']
+        exts.append( Extension('fcntl', ['fcntlmodule.c'], libraries=libs) )
+        # pwd(3)
+        exts.append( Extension('pwd', ['pwdmodule.c']) )
+        # grp(3)
+        exts.append( Extension('grp', ['grpmodule.c']) )
+        # spwd, shadow passwords
+        if (config_h_vars.get('HAVE_GETSPNAM', False) or
+                config_h_vars.get('HAVE_GETSPENT', False)):
+            exts.append( Extension('spwd', ['spwdmodule.c']) )
+        else:
+            missing.append('spwd')
+
+        # select(2); not on ancient System V
+        exts.append( Extension('select', ['selectmodule.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']:
+            exts.append( Extension('mmap', ['mmapmodule.c']) )
+        else:
+            missing.append('mmap')
+
+        # Lance Ellinghaus's syslog module
+        # syslog daemon interface
+        exts.append( Extension('syslog', ['syslogmodule.c']) )
+
+        # George Neville-Neil's timing module:
+        # Deprecated in PEP 4 http://www.python.org/peps/pep-0004.html
+        # http://mail.python.org/pipermail/python-dev/2006-January/060023.html
+        #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:
+
+        # Operations on audio samples
+        # According to #993173, this one should actually work fine on
+        # 64-bit platforms.
+        exts.append( Extension('audioop', ['audioop.c']) )
+
+        # Disabled on 64-bit platforms
+        if sys.maxint != 9223372036854775807L:
+            # Operations on images
+            exts.append( Extension('imageop', ['imageop.c']) )
+        else:
+            missing.extend(['imageop'])
+
+        # readline
+        do_readline = self.compiler.find_library_file(lib_dirs, 'readline')
+        readline_termcap_library = ""
+        curses_library = ""
+        # Determine if readline is already linked against curses or tinfo.
+        if do_readline and find_executable('ldd'):
+            fp = os.popen("ldd %s" % do_readline)
+            ldd_output = fp.readlines()
+            ret = fp.close()
+            if ret is None or ret >> 8 == 0:
+                for ln in ldd_output:
+                    if 'curses' in ln:
+                        readline_termcap_library = re.sub(
+                            r'.*lib(n?cursesw?)\.so.*', r'\1', ln
+                        ).rstrip()
+                        break
+                    if 'tinfo' in ln: # termcap interface split out from ncurses
+                        readline_termcap_library = 'tinfo'
+                        break
+        # Issue 7384: If readline is already linked against curses,
+        # use the same library for the readline and curses modules.
+        if 'curses' in readline_termcap_library:
+            curses_library = readline_termcap_library
+        elif self.compiler.find_library_file(lib_dirs, 'ncursesw'):
+            curses_library = 'ncursesw'
+        elif self.compiler.find_library_file(lib_dirs, 'ncurses'):
+            curses_library = 'ncurses'
+        elif self.compiler.find_library_file(lib_dirs, 'curses'):
+            curses_library = 'curses'
+
+        if platform == 'darwin':
+            os_release = int(os.uname()[2].split('.')[0])
+            dep_target = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET')
+            if dep_target and dep_target.split('.') < ['10', '5']:
+                os_release = 8
+            if os_release < 9:
+                # MacOSX 10.4 has a broken readline. Don't try to build
+                # the readline module unless the user has installed a fixed
+                # readline package
+                if find_file('readline/rlconf.h', inc_dirs, []) is None:
+                    do_readline = False
+        if do_readline:
+            if platform == 'darwin' and os_release < 9:
+                # In every directory on the search path search for a dynamic
+                # library and then a static library, instead of first looking
+                # for dynamic libraries on the entiry path.
+                # This way a staticly linked custom readline gets picked up
+                # before the (possibly broken) dynamic library in /usr/lib.
+                readline_extra_link_args = ('-Wl,-search_paths_first',)
+            else:
+                readline_extra_link_args = ()
+
+            readline_libs = ['readline']
+            if readline_termcap_library:
+                pass # Issue 7384: Already linked against curses or tinfo.
+            elif curses_library:
+                readline_libs.append(curses_library)
+            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'],
+                                   extra_link_args=readline_extra_link_args,
+                                   libraries=readline_libs) )
+        else:
+            missing.append('readline')
+
+        # crypt module.
+
+        if self.compiler.find_library_file(lib_dirs, 'crypt'):
+            libs = ['crypt']
+        else:
+            libs = []
+        exts.append( Extension('crypt', ['cryptmodule.c'], libraries=libs) )
+
+        # CSV files
+        exts.append( Extension('_csv', ['_csv.c']) )
+
+        # socket(2)
+        exts.append( Extension('_socket', ['socketmodule.c'],
+                               depends = ['socketmodule.h']) )
+        # Detect SSL support for the socket module (via _ssl)
+        search_for_ssl_incs_in = [
+                              '/usr/local/ssl/include',
+                              '/usr/contrib/ssl/include/'
+                             ]
+        ssl_incs = find_file('openssl/ssl.h', inc_dirs,
+                             search_for_ssl_incs_in
+                             )
+        if ssl_incs is not None:
+            krb5_h = find_file('krb5.h', inc_dirs,
+                               ['/usr/kerberos/include'])
+            if krb5_h:
+                ssl_incs += krb5_h
+        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']), )
+        else:
+            missing.append('_ssl')
+
+        # find out which version of OpenSSL we have
+        openssl_ver = 0
+        openssl_ver_re = re.compile(
+            '^\s*#\s*define\s+OPENSSL_VERSION_NUMBER\s+(0x[0-9a-fA-F]+)' )
+
+        # look for the openssl version header on the compiler search path.
+        opensslv_h = find_file('openssl/opensslv.h', [],
+                inc_dirs + search_for_ssl_incs_in)
+        if opensslv_h:
+            name = os.path.join(opensslv_h[0], 'openssl/opensslv.h')
+            if sys.platform == 'darwin' and is_macosx_sdk_path(name):
+                name = os.path.join(macosx_sdk_root(), name[1:])
+            try:
+                incfile = open(name, 'r')
+                for line in incfile:
+                    m = openssl_ver_re.match(line)
+                    if m:
+                        openssl_ver = eval(m.group(1))
+            except IOError, msg:
+                print "IOError while reading opensshv.h:", msg
+                pass
+
+        min_openssl_ver = 0x00907000
+        have_any_openssl = ssl_incs is not None and ssl_libs is not None
+        have_usable_openssl = (have_any_openssl and
+                               openssl_ver >= min_openssl_ver)
+
+        if have_any_openssl:
+            if have_usable_openssl:
+                # The _hashlib module wraps optimized implementations
+                # of hash functions from the OpenSSL library.
+                exts.append( Extension('_hashlib', ['_hashopenssl.c'],
+                                       include_dirs = ssl_incs,
+                                       library_dirs = ssl_libs,
+                                       libraries = ['ssl', 'crypto']) )
+            else:
+                print ("warning: openssl 0x%08x is too old for _hashlib" %
+                       openssl_ver)
+                missing.append('_hashlib')
+        if COMPILED_WITH_PYDEBUG or not have_usable_openssl:
+            # The _sha module implements the SHA1 hash algorithm.
+            exts.append( Extension('_sha', ['shamodule.c']) )
+            # The _md5 module implements the RSA Data Security, Inc. MD5
+            # Message-Digest Algorithm, described in RFC 1321.  The
+            # necessary files md5.c and md5.h are included here.
+            exts.append( Extension('_md5',
+                            sources = ['md5module.c', 'md5.c'],
+                            depends = ['md5.h']) )
+
+        min_sha2_openssl_ver = 0x00908000
+        if COMPILED_WITH_PYDEBUG or openssl_ver < min_sha2_openssl_ver:
+            # OpenSSL doesn't do these until 0.9.8 so we'll bring our own hash
+            exts.append( Extension('_sha256', ['sha256module.c']) )
+            exts.append( Extension('_sha512', ['sha512module.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.
+
+        # Sleepycat^WOracle Berkeley DB interface.
+        #  http://www.oracle.com/database/berkeley-db/db/index.html
+        #
+        # This requires the Sleepycat^WOracle DB code. The supported versions
+        # are set below.  Visit the URL above to download
+        # a release.  Most open source OSes come with one or more
+        # versions of BerkeleyDB already installed.
+
+        max_db_ver = (4, 8)
+        min_db_ver = (4, 1)
+        db_setup_debug = False   # verbose debug prints from this script?
+
+        def allow_db_ver(db_ver):
+            """Returns a boolean if the given BerkeleyDB version is acceptable.
+
+            Args:
+              db_ver: A tuple of the version to verify.
+            """
+            if not (min_db_ver <= db_ver <= max_db_ver):
+                return False
+            # Use this function to filter out known bad configurations.
+            if (4, 6) == db_ver[:2]:
+                # BerkeleyDB 4.6.x is not stable on many architectures.
+                arch = platform_machine()
+                if arch not in ('i386', 'i486', 'i586', 'i686',
+                                'x86_64', 'ia64'):
+                    return False
+            return True
+
+        def gen_db_minor_ver_nums(major):
+            if major == 4:
+                for x in range(max_db_ver[1]+1):
+                    if allow_db_ver((4, x)):
+                        yield x
+            elif major == 3:
+                for x in (3,):
+                    if allow_db_ver((3, x)):
+                        yield x
+            else:
+                raise ValueError("unknown major BerkeleyDB version", major)
+
+        # construct a list of paths to look for the header file in on
+        # top of the normal inc_dirs.
+        db_inc_paths = [
+            '/usr/include/db4',
+            '/usr/local/include/db4',
+            '/opt/sfw/include/db4',
+            '/usr/include/db3',
+            '/usr/local/include/db3',
+            '/opt/sfw/include/db3',
+            # Fink defaults (http://fink.sourceforge.net/)
+            '/sw/include/db4',
+            '/sw/include/db3',
+        ]
+        # 4.x minor number specific paths
+        for x in gen_db_minor_ver_nums(4):
+            db_inc_paths.append('/usr/include/db4%d' % x)
+            db_inc_paths.append('/usr/include/db4.%d' % x)
+            db_inc_paths.append('/usr/local/BerkeleyDB.4.%d/include' % x)
+            db_inc_paths.append('/usr/local/include/db4%d' % x)
+            db_inc_paths.append('/pkg/db-4.%d/include' % x)
+            db_inc_paths.append('/opt/db-4.%d/include' % x)
+            # MacPorts default (http://www.macports.org/)
+            db_inc_paths.append('/opt/local/include/db4%d' % x)
+        # 3.x minor number specific paths
+        for x in gen_db_minor_ver_nums(3):
+            db_inc_paths.append('/usr/include/db3%d' % x)
+            db_inc_paths.append('/usr/local/BerkeleyDB.3.%d/include' % x)
+            db_inc_paths.append('/usr/local/include/db3%d' % x)
+            db_inc_paths.append('/pkg/db-3.%d/include' % x)
+            db_inc_paths.append