Radix cross Linux

The main Radix cross Linux repository contains the build scripts of packages, which have the most complete and common functionality for desktop machines

452 Commits   2 Branches   1 Tag
Index: setup.py
===================================================================
--- setup.py	(nonexistent)
+++ setup.py	(revision 5)
@@ -0,0 +1,2362 @@
+# Autodetecting setup.py script for building the Python extensions
+#
+
+__version__ = "$Revision$"
+
+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
+
+cross_compiling = ("_PYTHON_HOST_PLATFORM" in os.environ) or ('PYTHONXCPREFIX' in os.environ)
+
+def get_platform():
+    # cross build
+    if "_PYTHON_HOST_PLATFORM" in os.environ:
+        return os.environ["_PYTHON_HOST_PLATFORM"]
+    # Get value of sys.platform
+    if sys.platform.startswith('osf1'):
+        return 'osf1'
+    return sys.platform
+host_platform = get_platform()
+
+# Were we compiled --with-pydebug or with #define Py_DEBUG?
+COMPILED_WITH_PYDEBUG = ('--with-pydebug' in sysconfig.get_config_var("CONFIG_ARGS"))
+
+# 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 dir not in dirlist:
+        if host_platform == 'darwin' and is_macosx_sdk_path(dir):
+            # If in a macOS SDK path, check relative to the SDK root
+            dir_exists = os.path.isdir(
+                os.path.join(macosx_sdk_root(), dir[1:]))
+        else:
+            dir_exists = os.path.isdir(dir)
+        if dir_exists:
+            dirlist.insert(0, dir)
+
+MACOS_SDK_ROOT = None
+
+def macosx_sdk_root():
+    """Return the directory of the current macOS SDK.
+
+    If no SDK was explicitly configured, call the compiler to find which
+    include files paths are being searched by default.  Use '/' if the
+    compiler is searching /usr/include (meaning system header files are
+    installed) or use the root of an SDK if that is being searched.
+    (The SDK may be supplied via Xcode or via the Command Line Tools).
+    The SDK paths used by Apple-supplied tool chains depend on the
+    setting of various variables; see the xcrun man page for more info.
+    """
+    global MACOS_SDK_ROOT
+
+    # If already called, return cached result.
+    if MACOS_SDK_ROOT:
+        return MACOS_SDK_ROOT
+
+    cflags = sysconfig.get_config_var('CFLAGS')
+    m = re.search(r'-isysroot\s+(\S+)', cflags)
+    if m is not None:
+        MACOS_SDK_ROOT = m.group(1)
+    else:
+        MACOS_SDK_ROOT = '/'
+        cc = sysconfig.get_config_var('CC')
+        tmpfile = '/tmp/setup_sdk_root.%d' % os.getpid()
+        try:
+            os.unlink(tmpfile)
+        except:
+            pass
+        ret = os.system('%s -E -v - </dev/null 2>%s 1>/dev/null' % (cc, tmpfile))
+        in_incdirs = False
+        try:
+            if ret >> 8 == 0:
+                with open(tmpfile) as fp:
+                    for line in fp.readlines():
+                        if line.startswith("#include <...>"):
+                            in_incdirs = True
+                        elif line.startswith("End of search list"):
+                            in_incdirs = False
+                        elif in_incdirs:
+                            line = line.strip()
+                            if line == '/usr/include':
+                                MACOS_SDK_ROOT = '/'
+                            elif line.endswith(".sdk/usr/include"):
+                                MACOS_SDK_ROOT = line[:-12]
+        finally:
+            os.unlink(tmpfile)
+
+    return MACOS_SDK_ROOT
+
+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/')
+                or path.startswith('/Library/') )
+
+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 host_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 host_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 host_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 host_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 host_platform == 'darwin' and is_macosx_sdk_path(p):
+            # Note that, as of Xcode 7, Apple SDKs may contain textual stub
+            # libraries with .tbd extensions rather than the normal .dylib
+            # shared libraries installed in /.  The Apple compiler tool
+            # chain handles this transparently but it can cause problems
+            # for programs that are being built with an SDK and searching
+            # for specific libraries.  Distutils find_library_file() now
+            # knows to also search for and return .tbd files.  But callers
+            # of find_library_file need to keep in mind that the base filename
+            # of the returned SDK library file might have a different extension
+            # from that of the library file installed on the running system,
+            # for example:
+            #   /Applications/Xcode.app/Contents/Developer/Platforms/
+            #       MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/
+            #       usr/lib/libedit.tbd
+            # vs
+            #   /usr/lib/libedit.dylib
+            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 host_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 = []
+
+        if host_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('include'), "*.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 = 0
+        if self.extensions:
+            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 host_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 host_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)))
+
+        # Don't try to load extensions for cross builds
+        if cross_compiling:
+            return
+
+        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 add_multiarch_paths(self):
+        # Debian/Ubuntu multiarch support.
+        # https://wiki.ubuntu.com/MultiarchSpec
+        cc = sysconfig.get_config_var('CC')
+        tmpfile = os.path.join(self.build_temp, 'multiarch')
+        if not os.path.exists(self.build_temp):
+            os.makedirs(self.build_temp)
+        ret = os.system(
+            '%s -print-multiarch > %s 2> /dev/null' % (cc, tmpfile))
+        multiarch_path_component = ''
+        try:
+            if ret >> 8 == 0:
+                with open(tmpfile) as fp:
+                    multiarch_path_component = fp.readline().strip()
+        finally:
+            os.unlink(tmpfile)
+
+        if multiarch_path_component != '':
+            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)
+            return
+
+        if not find_executable('dpkg-architecture'):
+            return
+        opt = ''
+        if cross_compiling:
+            opt = '-t' + sysconfig.get_config_var('HOST_GNU_TYPE')
+        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 %s -qDEB_HOST_MULTIARCH > %s 2> /dev/null' %
+            (opt, 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 add_gcc_paths(self):
+        gcc = sysconfig.get_config_var('CC')
+        tmpfile = os.path.join(self.build_temp, 'gccpaths')
+        if not os.path.exists(self.build_temp):
+            os.makedirs(self.build_temp)
+        ret = os.system('%s -E -v - </dev/null 2>%s 1>/dev/null' % (gcc, tmpfile))
+        is_gcc = False
+        in_incdirs = False
+        inc_dirs = []
+        lib_dirs = []
+        try:
+            if ret >> 8 == 0:
+                with open(tmpfile) as fp:
+                    for line in fp.readlines():
+                        if line.startswith("gcc version"):
+                            is_gcc = True
+                        elif line.startswith("#include <...>"):
+                            in_incdirs = True
+                        elif line.startswith("End of search list"):
+                            in_incdirs = False
+                        elif is_gcc and line.startswith("LIBRARY_PATH"):
+                            for d in line.strip().split("=")[1].split(":"):
+                                d = os.path.normpath(d)
+                                if '/gcc/' not in d:
+                                    add_dir_to_list(self.compiler.library_dirs,
+                                                    d)
+                        elif is_gcc and in_incdirs and '/gcc/' not in line:
+                            add_dir_to_list(self.compiler.include_dirs,
+                                            line.strip())
+        finally:
+            os.unlink(tmpfile)
+
+    def detect_modules(self):
+        # Ensure that /usr/local is always used, unless cross-compiling
+        if not cross_compiling:
+            add_dir_to_list(self.compiler.library_dirs, '/usr/local/lib')
+            add_dir_to_list(self.compiler.include_dirs, '/usr/local/include')
+        if cross_compiling:
+            self.add_gcc_paths()
+            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 cross_compiling \
+                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.
+        inc_dirs = self.compiler.include_dirs[:]
+        lib_dirs = self.compiler.library_dirs[:]
+        if not cross_compiling:
+            for d in (
+                '/usr/include',
+                ):
+                add_dir_to_list(inc_dirs, d)
+            for d in (
+                '/lib64', '/usr/lib64',
+                '/lib', '/usr/lib',
+                ):
+                add_dir_to_list(lib_dirs, d)
+        exts = []
+        missing = []
+
+        config_h = sysconfig.get_config_h_filename()
+        config_h_vars = sysconfig.parse_config_h(open(config_h))
+
+        srcdir = sysconfig.get_config_var('srcdir')
+
+        # Check for AtheOS which has libraries in non-standard locations
+        if host_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 host_platform in ['osf1', 'unixware7', 'openunix8']:
+            lib_dirs += ['/usr/ccs/lib']
+
+        # HP-UX11iv3 keeps files in lib/hpux folders.
+        if host_platform == 'hp-ux11':
+            lib_dirs += ['/usr/lib/hpux64', '/usr/lib/hpux32']
+
+        if host_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 host_platform in ['darwin', 'beos']:
+            math_libs = []
+
+        # Insert libraries and headers from embedded root file system (RFS)
+        if 'RFS' in os.environ:
+            lib_dirs += [os.environ['RFS'] + '/usr/lib']
+            inc_dirs += [os.environ['RFS'] + '/usr/include']
+
+        # 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']) )
+
+        shared_math = 'Modules/_math.o'
+        # complex math library functions
+        exts.append( Extension('cmath', ['cmathmodule.c'],
+                               extra_objects=[shared_math],
+                               depends=['_math.h', shared_math],
+                               libraries=math_libs) )
+        # math library functions, e.g. sin()
+        exts.append( Extension('math',  ['mathmodule.c'],
+                               extra_objects=[shared_math],
+                               depends=['_math.h', shared_math],
+                               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 host_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 host_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.maxsize != 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 host_platform == 'darwin':
+            os_release = int(os.uname()[2].split('.')[0])
+            dep_target = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET')
+            if (dep_target and
+                    (tuple(int(n) for n in dep_target.split('.')[0:2])
+                        < (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 host_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 entire path.
+                # This way a statically 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', 'timemodule.c'],
+                               depends=['socketmodule.h'],
+                               libraries=math_libs) )
+        # 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 host_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 = (5, 3)
+        min_db_ver = (4, 3)
+        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 == 5:
+                for x in range(max_db_ver[1]+1):
+                    if allow_db_ver((5, x)):
+                        yield x
+            elif major == 4:
+                for x in range(9):
+                    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('/opt/db-3.%d/include' % x)
+
+        if cross_compiling:
+            db_inc_paths = []
+
+        # Add some common subdirectories for Sleepycat DB to the list,
+        # based on the standard include directories. This way DB3/4 gets
+        # picked up when it is installed in a non-standard prefix and
+        # the user has added that prefix into inc_dirs.
+        std_variants = []
+        for dn in inc_dirs:
+            std_variants.append(os.path.join(dn, 'db3'))
+            std_variants.append(os.path.join(dn, 'db4'))
+            for x in gen_db_minor_ver_nums(4):
+                std_variants.append(os.path.join(dn, "db4%d"%x))
+                std_variants.append(os.path.join(dn, "db4.%d"%x))
+            for x in gen_db_minor_ver_nums(3):
+                std_variants.append(os.path.join(dn, "db3%d"%x))
+                std_variants.append(os.path.join(dn, "db3.%d"%x))
+
+        db_inc_paths = std_variants + db_inc_paths
+        db_inc_paths = [p for p in db_inc_paths if os.path.exists(p)]
+
+        db_ver_inc_map = {}
+
+        if host_platform == 'darwin':
+            sysroot = macosx_sdk_root()
+
+        class db_found(Exception): pass
+        try:
+            # See whether there is a Sleepycat header in the standard
+            # search path.
+            for d in inc_dirs + db_inc_paths:
+                f = os.path.join(d, "db.h")
+
+                if host_platform == 'darwin' and is_macosx_sdk_path(d):
+                    f = os.path.join(sysroot, d[1:], "db.h")
+
+                if db_setup_debug: print "db: looking for db.h in", f
+                if os.path.exists(f):
+                    f = open(f).read()
+                    m = re.search(r"#define\WDB_VERSION_MAJOR\W(\d+)", f)
+                    if m:
+                        db_major = int(m.group(1))
+                        m = re.search(r"#define\WDB_VERSION_MINOR\W(\d+)", f)
+                        db_minor = int(m.group(1))
+                        db_ver = (db_major, db_minor)
+
+                        # Avoid 4.6 prior to 4.6.21 due to a BerkeleyDB bug
+                        if db_ver == (4, 6):
+                            m = re.search(r"#define\WDB_VERSION_PATCH\W(\d+)", f)
+                            db_patch = int(m.group(1))
+                            if db_patch < 21:
+                                print "db.h:", db_ver, "patch", db_patch,
+                                print "being ignored (4.6.x must be >= 4.6.21)"
+                                continue
+
+                        if ( (db_ver not in db_ver_inc_map) and
+                            allow_db_ver(db_ver) ):
+                            # save the include directory with the db.h version
+                            # (first occurrence only)
+                            db_ver_inc_map[db_ver] = d
+                            if db_setup_debug:
+                                print "db.h: found", db_ver, "in", d
+                        else:
+                            # we already found a header for this library version
+                            if db_setup_debug: print "db.h: ignoring", d
+                    else:
+                        # ignore this header, it didn't contain a version number
+                        if db_setup_debug:
+                            print "db.h: no version number version in", d
+
+            db_found_vers = db_ver_inc_map.keys()
+            db_found_vers.sort()
+
+            while db_found_vers:
+                db_ver = db_found_vers.pop()
+                db_incdir = db_ver_inc_map[db_ver]
+
+                # check lib directories parallel to the location of the header
+                db_dirs_to_check = [
+                    db_incdir.replace("include", 'lib64'),
+                    db_incdir.replace("include", 'lib'),
+                ]
+
+                if host_platform != 'darwin':
+                    db_dirs_to_check = filter(os.path.isdir, db_dirs_to_check)
+
+                else:
+                    # Same as other branch, but takes OSX SDK into account
+                    tmp = []
+                    for dn in db_dirs_to_check:
+                        if is_macosx_sdk_path(dn):
+                            if os.path.isdir(os.path.join(sysroot, dn[1:])):
+                                tmp.append(dn)
+                        else:
+                            if os.path.isdir(dn):
+                                tmp.append(dn)
+                    db_dirs_to_check = tmp
+
+                # Look for a version specific db-X.Y before an ambiguous dbX
+                # XXX should we -ever- look for a dbX name?  Do any
+                # systems really not name their library by version and
+                # symlink to more general names?
+                for dblib in (('db-%d.%d' % db_ver),
+                              ('db%d%d' % db_ver),
+                              ('db%d' % db_ver[0])):
+                    dblib_file = self.compiler.find_library_file(
+                                    db_dirs_to_check + lib_dirs, dblib )
+                    if dblib_file:
+                        dblib_dir = [ os.path.abspath(os.path.dirname(dblib_file)) ]
+                        raise db_found
+                    else:
+                        if db_setup_debug: print "db lib: ", dblib, "not found"
+
+        except db_found:
+            if db_setup_debug:
+                print "bsddb using BerkeleyDB lib:", db_ver, dblib
+                print "bsddb lib dir:", dblib_dir, " inc dir:", db_incdir
+            db_incs = [db_incdir]
+            dblibs = [dblib]
+            # We add the runtime_library_dirs argument because the
+            # BerkeleyDB lib we're linking against often isn't in the
+            # system dynamic library search path.  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'],
+                                  depends = ['bsddb.h'],
+                                  library_dirs=dblib_dir,
+                                  runtime_library_dirs=dblib_dir,
+                                  include_dirs=db_incs,
+                                  libraries=dblibs))
+        else:
+            if db_setup_debug: print "db: no appropriate library found"
+            db_incs = None
+            dblibs = []
+            dblib_dir = None
+            missing.append('_bsddb')
+
+        # The sqlite interface
+        sqlite_setup_debug = False   # verbose debug prints from this script?
+
+        # We hunt for #define SQLITE_VERSION "n.n.n"
+        # We need to find >= sqlite version 3.0.8
+        sqlite_incdir = sqlite_libdir = None
+        sqlite_inc_paths = [ '/usr/include',
+                             '/usr/include/sqlite',
+                             '/usr/include/sqlite3',
+                             '/usr/local/include',
+                             '/usr/local/include/sqlite',
+                             '/usr/local/include/sqlite3',
+                           ]
+        if cross_compiling:
+            sqlite_inc_paths = []
+        MIN_SQLITE_VERSION_NUMBER = (3, 0, 8)
+        MIN_SQLITE_VERSION = ".".join([str(x)
+                                    for x in MIN_SQLITE_VERSION_NUMBER])
+
+        # Scan the default include directories before the SQLite specific
+        # ones. This allows one to override the copy of sqlite on OSX,
+        # where /usr/include contains an old version of sqlite.
+        if host_platform == 'darwin':
+            sysroot = macosx_sdk_root()
+
+        for d_ in inc_dirs + sqlite_inc_paths:
+            d = d_
+            if host_platform == 'darwin' and is_macosx_sdk_path(d):
+                d = os.path.join(sysroot, d[1:])
+
+            f = os.path.join(d, "sqlite3.h")
+            if os.path.exists(f):
+                if sqlite_setup_debug: print "sqlite: found %s"%f
+                incf = open(f).read()
+                m = re.search(
+                    r'\s*.*#\s*.*define\s.*SQLITE_VERSION\W*"([\d\.]*)"', incf)
+                if m:
+                    sqlite_version = m.group(1)
+                    sqlite_version_tuple = tuple([int(x)
+                                        for x in sqlite_version.split(".")])
+                    if sqlite_version_tuple >= MIN_SQLITE_VERSION_NUMBER:
+                        # we win!
+                        if sqlite_setup_debug:
+                            print "%s/sqlite3.h: version %s"%(d, sqlite_version)
+                        sqlite_incdir = d
+                        break
+                    else:
+                        if sqlite_setup_debug:
+                            print "%s: version %d is too old, need >= %s"%(d,
+                                        sqlite_version, MIN_SQLITE_VERSION)
+                elif sqlite_setup_debug:
+                    print "sqlite: %s had no SQLITE_VERSION"%(f,)
+
+        if sqlite_incdir:
+            sqlite_dirs_to_check = [
+                os.path.join(sqlite_incdir, '..', 'lib64'),
+                os.path.join(sqlite_incdir, '..', 'lib'),
+                os.path.join(sqlite_incdir, '..', '..', 'lib64'),
+                os.path.join(sqlite_incdir, '..', '..', 'lib'),
+            ]
+            sqlite_libfile = self.compiler.find_library_file(
+                                sqlite_dirs_to_check + lib_dirs, 'sqlite3')
+            if sqlite_libfile:
+                sqlite_libdir = [os.path.abspath(os.path.dirname(sqlite_libfile))]
+
+        if sqlite_incdir and sqlite_libdir:
+            sqlite_srcs = ['_sqlite/cache.c',
+                '_sqlite/connection.c',
+                '_sqlite/cursor.c',
+                '_sqlite/microprotocols.c',
+                '_sqlite/module.c',
+                '_sqlite/prepare_protocol.c',
+                '_sqlite/row.c',
+                '_sqlite/statement.c',
+                '_sqlite/util.c', ]
+
+            sqlite_defines = []
+            if host_platform != "win32":
+                sqlite_defines.append(('MODULE_NAME', '"sqlite3"'))
+            else:
+                sqlite_defines.append(('MODULE_NAME', '\\"sqlite3\\"'))
+
+            # Comment this out if you want the sqlite3 module to be able to load extensions.
+            sqlite_defines.append(("SQLITE_OMIT_LOAD_EXTENSION", "1"))
+
+            if host_platform == 'darwin':
+                # 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 entire path.
+                # This way a statically linked custom sqlite gets picked up
+                # before the dynamic library in /usr/lib.
+                sqlite_extra_link_args = ('-Wl,-search_paths_first',)
+            else:
+                sqlite_extra_link_args = ()
+
+            exts.append(Extension('_sqlite3', sqlite_srcs,
+                                  define_macros=sqlite_defines,
+                                  include_dirs=["Modules/_sqlite",
+                                                sqlite_incdir],
+                                  library_dirs=sqlite_libdir,
+                                  extra_link_args=sqlite_extra_link_args,
+                                  libraries=["sqlite3",]))
+        else:
+            missing.append('_sqlite3')
+
+        # Look for Berkeley db 1.85.   Note that it is built as a different
+        # module name so it can be included even when later versions are
+        # available.  A very restrictive search is performed to avoid
+        # accidentally building this module with a later version of the
+        # underlying db library.  May BSD-ish Unixes incorporate db 1.85
+        # symbols into libc and place the include file in /usr/include.
+        #
+        # If the better bsddb library can be built (db_incs is defined)
+        # we do not build this one.  Otherwise this build will pick up
+        # the more recent berkeleydb's db.h file first in the include path
+        # when attempting to compile and it will fail.
+        f = "/usr/include/db.h"
+
+        if host_platform == 'darwin':
+            if is_macosx_sdk_path(f):
+                sysroot = macosx_sdk_root()
+                f = os.path.join(sysroot, f[1:])
+
+        if os.path.exists(f) and not db_incs:
+            data = open(f).read()
+            m = re.search(r"#s*define\s+HASHVERSION\s+2\s*", data)
+            if m is not None:
+                # bingo - old version used hash file format version 2
+                ### XXX this should be fixed to not be platform-dependent
+                ### but I don't have direct access to an osf1 platform and
+                ### seemed to be muffing the search somehow
+                libraries = host_platform == "osf1" and ['db'] or None
+                if libraries is not None:
+                    exts.append(Extension('bsddb185', ['bsddbmodule.c'],
+                                          libraries=libraries))
+                else:
+                    exts.append(Extension('bsddb185', ['bsddbmodule.c']))
+            else:
+                missing.append('bsddb185')
+        else:
+            missing.append('bsddb185')
+
+        dbm_order = ['gdbm']
+        # The standard Unix dbm module:
+        if host_platform not in ['cygwin']:
+            config_args = [arg.strip("'")
+                           for arg in sysconfig.get_config_var("CONFIG_ARGS").split()]
+            dbm_args = [arg for arg in config_args
+                        if arg.startswith('--with-dbmliborder=')]
+            if dbm_args:
+                dbm_order = [arg.split('=')[-1] for arg in dbm_args][-1].split(":")
+            else:
+                dbm_order = "ndbm:gdbm:bdb".split(":")
+            dbmext = None
+            for cand in dbm_order:
+                if cand == "ndbm":
+                    if find_file("ndbm.h", inc_dirs, []) is not None:
+                        # Some systems have -lndbm, others have -lgdbm_compat,
+                        # others don't have either
+                        if self.compiler.find_library_file(lib_dirs,
+                                                               'ndbm'):
+                            ndbm_libs = ['ndbm']
+                        elif self.compiler.find_library_file(lib_dirs,
+                                                             'gdbm_compat'):
+                            ndbm_libs = ['gdbm_compat']
+                        else:
+                            ndbm_libs = []
+                        print "building dbm using ndbm"
+                        dbmext = Extension('dbm', ['dbmmodule.c'],
+                                           define_macros=[
+                                               ('HAVE_NDBM_H',None),
+                                               ],
+                                           libraries=ndbm_libs)
+                        break
+
+                elif cand == "gdbm":
+                    if self.compiler.find_library_file(lib_dirs, 'gdbm'):
+                        gdbm_libs = ['gdbm']
+                        if self.compiler.find_library_file(lib_dirs,
+                                                               'gdbm_compat'):
+                            gdbm_libs.append('gdbm_compat')
+                        if find_file("gdbm/ndbm.h", inc_dirs, []) is not None:
+                            print "building dbm using gdbm"
+                            dbmext = Extension(
+                                'dbm', ['dbmmodule.c'],
+                                define_macros=[
+                                    ('HAVE_GDBM_NDBM_H', None),
+                                    ],
+                                libraries = gdbm_libs)
+                            break
+                        if find_file("gdbm-ndbm.h", inc_dirs, []) is not None:
+                            print "building dbm using gdbm"
+                            dbmext = Extension(
+                                'dbm', ['dbmmodule.c'],
+                                define_macros=[
+                                    ('HAVE_GDBM_DASH_NDBM_H', None),
+                                    ],
+                                libraries = gdbm_libs)
+                            break
+                elif cand == "bdb":
+                    if db_incs is not None:
+                        print "building dbm using bdb"
+                        dbmext = 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)
+                        break
+            if dbmext is not None:
+                exts.append(dbmext)
+            else:
+                missing.append('dbm')
+
+        # Anthony Baxter's gdbm module.  GNU dbm(3) will require -lgdbm:
+        if ('gdbm' in dbm_order and
+            self.compiler.find_library_file(lib_dirs, 'gdbm')):
+            exts.append( Extension('gdbm', ['gdbmmodule.c'],
+                                   libraries = ['gdbm'] ) )
+        else:
+            missing.append('gdbm')
+
+        # Unix-only modules
+        if host_platform not in ['win32']:
+            # Steen Lumholt's termios module
+            exts.append( Extension('termios', ['termios.c']) )
+            # Jeremy Hylton's rlimit interface
+            if host_platform not in ['atheos']:
+                exts.append( Extension('resource', ['resource.c']) )
+            else:
+                missing.append('resource')
+
+            nis = self._detect_nis(inc_dirs, lib_dirs)
+            if nis is not None:
+                exts.append(nis)
+            else:
+                missing.append('nis')
+
+        # Curses support, requiring the System V version of curses, often
+        # provided by the ncurses library.
+        panel_library = 'panel'
+        curses_incs = None
+        if curses_library.startswith('ncurses'):
+            if curses_library == 'ncursesw':
+                # Bug 1464056: If _curses.so links with ncursesw,
+                # _curses_panel.so must link with panelw.
+                panel_library = 'panelw'
+            curses_libs = [curses_library]
+            curses_incs = find_file('curses.h', inc_dirs,
+                                    [os.path.join(d, 'ncursesw') for d in inc_dirs])
+            exts.append( Extension('_curses', ['_cursesmodule.c'],
+                                   include_dirs = curses_incs,
+                                   libraries = curses_libs) )
+        elif curses_library == 'curses' and host_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']
+            elif (self.compiler.find_library_file(lib_dirs, 'termcap')):
+                curses_libs = ['curses', 'termcap']
+            else:
+                curses_libs = ['curses']
+
+            exts.append( Extension('_curses', ['_cursesmodule.c'],
+                                   libraries = curses_libs) )
+        else:
+            missing.append('_curses')
+
+        # 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_library)):
+            exts.append( Extension('_curses_panel', ['_curses_panel.c'],
+                                   include_dirs = curses_incs,
+                                   libraries = [panel_library] + curses_libs) )
+        else:
+            missing.append('_curses_panel')
+
+        # 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)
+        have_zlib = False
+        if zlib_inc is not None:
+            zlib_h = zlib_inc[0] + '/zlib.h'
+            version = '"0.0.0"'
+            version_req = '"1.1.3"'
+            if host_platform == 'darwin' and is_macosx_sdk_path(zlib_h):
+                zlib_h = os.path.join(macosx_sdk_root(), zlib_h[1:])
+            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')):
+                    if host_platform == "darwin":
+                        zlib_extra_link_args = ('-Wl,-search_paths_first',)
+                    else:
+                        zlib_extra_link_args = ()
+                    exts.append( Extension('zlib', ['zlibmodule.c'],
+                                           libraries = ['z'],
+                                           extra_link_args = zlib_extra_link_args))
+                    have_zlib = True
+                else:
+                    missing.append('zlib')
+            else:
+                missing.append('zlib')
+        else:
+            missing.append('zlib')
+
+        # Helper module for various ascii-encoders.  Uses zlib for an optimized
+        # crc32 if we have it.  Otherwise binascii uses its own.
+        if have_zlib:
+            extra_compile_args = ['-DUSE_ZLIB_CRC32']
+            libraries = ['z']
+            extra_link_args = zlib_extra_link_args
+        else:
+            extra_compile_args = []
+            libraries = []
+            extra_link_args = []
+        exts.append( Extension('binascii', ['binascii.c'],
+                               extra_compile_args = extra_compile_args,
+                               libraries = libraries,
+                               extra_link_args = extra_link_args) )
+
+        # Gustavo Niemeyer's bz2 module.
+        if (self.compiler.find_library_file(lib_dirs, 'bz2')):
+            if host_platform == "darwin":
+                bz2_extra_link_args = ('-Wl,-search_paths_first',)
+            else:
+                bz2_extra_link_args = ()
+            exts.append( Extension('bz2', ['bz2module.c'],
+                                   libraries = ['bz2'],
+                                   extra_link_args = bz2_extra_link_args) )
+        else:
+            missing.append('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.  The Expat source is included in Modules/expat/.  Usage
+        # of a system shared libexpat.so is possible with --with-system-expat
+        # configure option.
+        #
+        # More information on Expat can be found at www.libexpat.org.
+        #
+        if '--with-system-expat' in sysconfig.get_config_var("CONFIG_ARGS"):
+            expat_inc = []
+            define_macros = []
+            expat_lib = ['expat']
+            expat_sources = []
+            expat_depends = []
+        else:
+            expat_inc = [os.path.join(os.getcwd(), srcdir, 'Modules', 'expat')]
+            define_macros = [
+                ('HAVE_EXPAT_CONFIG_H', '1'),
+                # bpo-30947: Python uses best available entropy sources to
+                # call XML_SetHashSalt(), expat entropy sources are not needed
+                ('XML_POOR_ENTROPY', '1'),
+            ]
+            expat_lib = []
+            expat_sources = ['expat/xmlparse.c',
+                             'expat/xmlrole.c',
+                             'expat/xmltok.c']
+            expat_depends = ['expat/ascii.h',
+                             'expat/asciitab.h',
+                             'expat/expat.h',
+                             'expat/expat_config.h',
+                             'expat/expat_external.h',
+                             'expat/internal.h',
+                             'expat/latin1tab.h',
+                             'expat/utf8tab.h',
+                             'expat/xmlrole.h',
+                             'expat/xmltok.h',
+                             'expat/xmltok_impl.h'
+                             ]
+
+        exts.append(Extension('pyexpat',
+                              define_macros = define_macros,
+                              include_dirs = expat_inc,
+                              libraries = expat_lib,
+                              sources = ['pyexpat.c'] + expat_sources,
+                              depends = expat_depends,
+                              ))
+
+        # Fredrik Lundh's cElementTree module.  Note that this also
+        # uses expat (via the CAPI hook in pyexpat).
+
+        if os.path.isfile(os.path.join(srcdir, 'Modules', '_elementtree.c')):
+            define_macros.append(('USE_PYEXPAT_CAPI', None))
+            exts.append(Extension('_elementtree',
+                                  define_macros = define_macros,
+                                  include_dirs = expat_inc,
+                                  libraries = expat_lib,
+                                  sources = ['_elementtree.c'],
+                                  depends = ['pyexpat.c'] + expat_sources +
+                                      expat_depends,
+                                  ))
+        else:
+            missing.append('_elementtree')
+
+        # Hye-Shik Chang's CJKCodecs modules.
+        if have_unicode:
+            exts.append(Extension('_multibytecodec',
+                                  ['cjkcodecs/multibytecodec.c']))
+            for loc in ('kr', 'jp', 'cn', 'tw', 'hk', 'iso2022'):
+                exts.append(Extension('_codecs_%s' % loc,
+                                      ['cjkcodecs/_codecs_%s.c' % loc]))
+        else:
+            missing.append('_multibytecodec')
+            for loc in ('kr', 'jp', 'cn', 'tw', 'hk', 'iso2022'):
+                missing.append('_codecs_%s' % loc)
+
+        # 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 (host_platform not in ['atheos']):
+                exts.append( Extension('dl', ['dlmodule.c']) )
+            else:
+                missing.append('dl')
+        else:
+            missing.append('dl')
+
+        # Thomas Heller's _ctypes module
+        self.detect_ctypes(inc_dirs, lib_dirs)
+
+        # Richard Oudkerk's multiprocessing module
+        if host_platform == 'win32':             # Windows
+            macros = dict()
+            libraries = ['ws2_32']
+
+        elif host_platform == 'darwin':          # Mac OSX
+            macros = dict()
+            libraries = []
+
+        elif host_platform == 'cygwin':          # Cygwin
+            macros = dict()
+            libraries = []
+
+        elif host_platform in ('freebsd4', 'freebsd5', 'freebsd6', 'freebsd7', 'freebsd8'):
+            # FreeBSD's P1003.1b semaphore support is very experimental
+            # and has many known problems. (as of June 2008)
+            macros = dict()
+            libraries = []
+
+        elif host_platform.startswith('openbsd'):
+            macros = dict()
+            libraries = []
+
+        elif host_platform.startswith('netbsd'):
+            macros = dict()
+            libraries = []
+
+        else:                                   # Linux and other unices
+            macros = dict()
+            libraries = ['rt']
+
+        if host_platform == 'win32':
+            multiprocessing_srcs = [ '_multiprocessing/multiprocessing.c',
+                                     '_multiprocessing/semaphore.c',
+                                     '_multiprocessing/pipe_connection.c',
+                                     '_multiprocessing/socket_connection.c',
+                                     '_multiprocessing/win32_functions.c'
+                                   ]
+
+        else:
+            multiprocessing_srcs = [ '_multiprocessing/multiprocessing.c',
+                                     '_multiprocessing/socket_connection.c'
+                                   ]
+            if (sysconfig.get_config_var('HAVE_SEM_OPEN') and not
+                sysconfig.get_config_var('POSIX_SEMAPHORES_NOT_ENABLED')):
+                multiprocessing_srcs.append('_multiprocessing/semaphore.c')
+
+        if sysconfig.get_config_var('WITH_THREAD'):
+            exts.append ( Extension('_multiprocessing', multiprocessing_srcs,
+                                    define_macros=macros.items(),
+                                    include_dirs=["Modules/_multiprocessing"]))
+        else:
+            missing.append('_multiprocessing')
+
+        # End multiprocessing
+
+
+        # Platform-specific libraries
+        if host_platform == 'linux2':
+            # Linux-specific modules
+            exts.append( Extension('linuxaudiodev', ['linuxaudiodev.c']) )
+        else:
+            missing.append('linuxaudiodev')
+
+        if (host_platform in ('linux2', 'freebsd4', 'freebsd5', 'freebsd6',
+                        'freebsd7', 'freebsd8')
+            or host_platform.startswith("gnukfreebsd")):
+            exts.append( Extension('ossaudiodev', ['ossaudiodev.c']) )
+        else:
+            missing.append('ossaudiodev')
+
+        if host_platform == 'sunos5':
+            # SunOS specific modules
+            exts.append( Extension('sunaudiodev', ['sunaudiodev.c']) )
+        else:
+            missing.append('sunaudiodev')
+
+        if host_platform == 'darwin':
+            # _scproxy
+            exts.append(Extension("_scproxy", [os.path.join(srcdir, "Mac/Modules/_scproxy.c")],
+                extra_link_args= [
+                    '-framework', 'SystemConfiguration',
+                    '-framework', 'CoreFoundation'
+                ]))
+
+
+        if host_platform == 'darwin' and ("--disable-toolbox-glue" not in
+                sysconfig.get_config_var("CONFIG_ARGS")):
+
+            if int(os.uname()[2].split('.')[0]) >= 8:
+                # We're on Mac OS X 10.4 or later, the compiler should
+                # support '-Wno-deprecated-declarations'. This will
+                # suppress deprecation warnings for the Carbon extensions,
+                # these extensions wrap the Carbon APIs and even those
+                # parts that are deprecated.
+                carbon_extra_compile_args = ['-Wno-deprecated-declarations']
+            else:
+                carbon_extra_compile_args = []
+
+            # Mac OS X specific modules.
+            def macSrcExists(name1, name2=''):
+                if not name1:
+                    return None
+                names = (name1,)
+                if name2:
+                    names = (name1, name2)
+                path = os.path.join(srcdir, 'Mac', 'Modules', *names)
+                return os.path.exists(path)
+
+            def addMacExtension(name, kwds, extra_srcs=[]):
+                dirname = ''
+                if name[0] == '_':
+                    dirname = name[1:].lower()
+                cname = name + '.c'
+                cmodulename = name + 'module.c'
+                # Check for NNN.c, NNNmodule.c, _nnn/NNN.c, _nnn/NNNmodule.c
+                if macSrcExists(cname):
+                    srcs = [cname]
+                elif macSrcExists(cmodulename):
+                    srcs = [cmodulename]
+                elif macSrcExists(dirname, cname):
+                    # XXX(nnorwitz): If all the names ended with module, we
+                    # wouldn't need this condition.  ibcarbon is the only one.
+                    srcs = [os.path.join(dirname, cname)]
+                elif macSrcExists(dirname, cmodulename):
+                    srcs = [os.path.join(dirname, cmodulename)]
+                else:
+                    raise RuntimeError("%s not found" % name)
+
+                # Here's the whole point:  add the extension with sources
+                exts.append(Extension(name, srcs + extra_srcs, **kwds))
+
+            # Core Foundation
+            core_kwds = {'extra_compile_args': carbon_extra_compile_args,
+                         'extra_link_args': ['-framework', 'CoreFoundation'],
+                        }
+            addMacExtension('_CF', core_kwds, ['cf/pycfbridge.c'])
+            addMacExtension('autoGIL', core_kwds)
+
+
+
+            # Carbon
+            carbon_kwds = {'extra_compile_args': carbon_extra_compile_args,
+                           'extra_link_args': ['-framework', 'Carbon'],
+                          }
+            CARBON_EXTS = ['ColorPicker', 'gestalt', 'MacOS', 'Nav',
+                           'OSATerminology', 'icglue',
+                           # All these are in subdirs
+                           '_AE', '_AH', '_App', '_CarbonEvt', '_Cm', '_Ctl',
+                           '_Dlg', '_Drag', '_Evt', '_File', '_Folder', '_Fm',
+                           '_Help', '_Icn', '_IBCarbon', '_List',
+                           '_Menu', '_Mlte', '_OSA', '_Res', '_Qd', '_Qdoffs',
+                           '_Scrap', '_Snd', '_TE',
+                          ]
+            for name in CARBON_EXTS:
+                addMacExtension(name, carbon_kwds)
+
+            # Workaround for a bug in the version of gcc shipped with Xcode 3.
+            # The _Win extension should build just like the other Carbon extensions, but
+            # this actually results in a hard crash of the linker.
+            #
+            if '-arch ppc64' in cflags and '-arch ppc' in cflags:
+                win_kwds = {'extra_compile_args': carbon_extra_compile_args + ['-arch', 'i386', '-arch', 'ppc'],
+                               'extra_link_args': ['-framework', 'Carbon', '-arch', 'i386', '-arch', 'ppc'],
+                           }
+                addMacExtension('_Win', win_kwds)
+            else:
+                addMacExtension('_Win', carbon_kwds)
+
+
+            # Application Services & QuickTime
+            app_kwds = {'extra_compile_args': carbon_extra_compile_args,
+                        'extra_link_args': ['-framework','ApplicationServices'],
+                       }
+            addMacExtension('_Launch', app_kwds)
+            addMacExtension('_CG', app_kwds)
+
+            exts.append( Extension('_Qt', ['qt/_Qtmodule.c'],
+                        extra_compile_args=carbon_extra_compile_args,
+                        extra_link_args=['-framework', 'QuickTime',
+                                     '-framework', 'Carbon']) )
+
+
+        self.extensions.extend(exts)
+
+        # Call the method for detecting whether _tkinter can be compiled
+        self.detect_tkinter(inc_dirs, lib_dirs)
+
+        if '_tkinter' not in [e.name for e in self.extensions]:
+            missing.append('_tkinter')
+
+##         # Uncomment these lines if you want to play with xxmodule.c
+##         ext = Extension('xx', ['xxmodule.c'])
+##         self.extensions.append(ext)
+
+        return missing
+
+    def detect_tkinter_explicitly(self):
+        # Build _tkinter using explicit locations for Tcl/Tk.
+        #
+        # This is enabled when both arguments are given to ./configure:
+        #
+        #     --with-tcltk-includes="-I/path/to/tclincludes \
+        #                            -I/path/to/tkincludes"
+        #     --with-tcltk-libs="-L/path/to/tcllibs -ltclm.n \
+        #                        -L/path/to/tklibs -ltkm.n"
+        #
+        # These values can also be specified or overridden via make:
+        #    make TCLTK_INCLUDES="..." TCLTK_LIBS="..."
+        #
+        # This can be useful for building and testing tkinter with multiple
+        # versions of Tcl/Tk.  Note that a build of Tk depends on a particular
+        # build of Tcl so you need to specify both arguments and use care when
+        # overriding.
+
+        # The _TCLTK variables are created in the Makefile sharedmods target.
+        tcltk_includes = os.environ.get('_TCLTK_INCLUDES')
+        tcltk_libs = os.environ.get('_TCLTK_LIBS')
+        if not (tcltk_includes and tcltk_libs):
+            # Resume default configuration search.
+            return 0
+
+        extra_compile_args = tcltk_includes.split()
+        extra_link_args = tcltk_libs.split()
+        ext = Extension('_tkinter', ['_tkinter.c', 'tkappinit.c'],
+                        define_macros=[('WITH_APPINIT', 1)],
+                        extra_compile_args = extra_compile_args,
+                        extra_link_args = extra_link_args,
+                        )
+        self.extensions.append(ext)
+        return 1
+
+    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 = [
+            '/Library/Frameworks',
+            '/System/Library/Frameworks/',
+            join(os.getenv('HOME'), '/Library/Frameworks')
+        ]
+
+        sysroot = macosx_sdk_root()
+
+        # Find the directory that contains the Tcl.framework 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 is_macosx_sdk_path(F):
+                    if not exists(join(sysroot, F[1:], fw + '.framework')):
+                        break
+                else:
+                    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']
+
+        # All existing framework builds of Tcl/Tk don't support 64-bit
+        # architectures.
+        cflags = sysconfig.get_config_vars('CFLAGS')[0]
+        archs = re.findall('-arch\s+(\w+)', cflags)
+
+        if is_macosx_sdk_path(F):
+            fp = os.popen("file %s/Tk.framework/Tk | grep 'for architecture'"%(os.path.join(sysroot, F[1:]),))
+        else:
+            fp = os.popen("file %s/Tk.framework/Tk | grep 'for architecture'"%(F,))
+
+        detected_archs = []
+        for ln in fp:
+            a = ln.split()[-1]
+            if a in archs:
+                detected_archs.append(ln.split()[-1])
+        fp.close()
+
+        for a in detected_archs:
+            frameworks.append('-arch')
+            frameworks.append(a)
+
+        ext = Extension('_tkinter', ['_tkinter.c', 'tkappinit.c'],
+                        define_macros=[('WITH_APPINIT', 1)],
+                        include_dirs = include_dirs,
+                        libraries = [],
+                        extra_compile_args = frameworks[2:],
+                        extra_link_args = frameworks,
+                        )
+        self.extensions.append(ext)
+        return 1
+
+    def detect_tkinter(self, inc_dirs, lib_dirs):
+        # The _tkinter module.
+
+        # Check whether --with-tcltk-includes and --with-tcltk-libs were
+        # configured or passed into the make target.  If so, use these values
+        # to build tkinter and bypass the searches for Tcl and TK in standard
+        # locations.
+        if self.detect_tkinter_explicitly():
+            return
+
+        # 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.
+        if (host_platform == 'darwin' and
+            self.detect_tkinter_darwin(inc_dirs, lib_dirs)):
+            return
+
+        # 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 ['8.6', '86', '8.5', '85', '8.4', '84', '8.3', '83',
+                        '8.2', '82', '8.1', '81', '8.0', '80']:
+            tklib = self.compiler.find_library_file(lib_dirs,
+                                                        'tk' + version)
+            tcllib = self.compiler.find_library_file(lib_dirs,
+                                                         '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 and {Free,Open}BSD, where
+            # they're put in /usr/include/{tcl,tk}X.Y
+            dotversion = version
+            if '.' not in dotversion and "bsd" in host_platform.lower():
+                # OpenBSD and FreeBSD use Tcl/Tk library names like libtcl83.a,
+                # but the include subdirs are named like .../include/tcl8.3.
+                dotversion = dotversion[:-1] + '.' + dotversion[-1]
+            tcl_include_sub = []
+            tk_include_sub = []
+            for dir in inc_dirs:
+                tcl_include_sub += [dir + os.sep + "tcl" + dotversion]
+                tk_include_sub += [dir + os.sep + "tk" + dotversion]
+            tk_include_sub += tcl_include_sub
+            tcl_includes = find_file('tcl.h', inc_dirs, tcl_include_sub)
+            tk_includes = find_file('tk.h', inc_dirs, tk_include_sub)
+
+        if (tcllib is None or tklib is None or
+            tcl_includes is None or tk_includes is None):
+            self.announce("INFO: Can't locate Tcl/Tk libs and/or headers", 2)
+            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 host_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/lib64')
+            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')
+
+        # If Cygwin, then verify that X is installed before proceeding
+        if host_platform == 'cygwin':
+            x11_inc = find_file('X11/Xlib.h', [], include_dirs)
+            if x11_inc is None:
+                return
+
+        # 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('tk'+ version)
+        libs.append('tcl'+ version)
+
+        if host_platform in ['aix3', 'aix4']:
+            libs.append('ld')
+
+        # Finally, link with the X11 libraries (not appropriate on cygwin)
+        if host_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 \
+
+    def configure_ctypes_darwin(self, ext):
+        # Darwin (OS X) uses preconfigured files, in
+        # the Modules/_ctypes/libffi_osx directory.
+        srcdir = sysconfig.get_config_var('srcdir')
+        ffi_srcdir = os.path.abspath(os.path.join(srcdir, 'Modules',
+                                                  '_ctypes', 'libffi_osx'))
+        sources = [os.path.join(ffi_srcdir, p)
+                   for p in ['ffi.c',
+                             'x86/darwin64.S',
+                             'x86/x86-darwin.S',
+                             'x86/x86-ffi_darwin.c',
+                             'x86/x86-ffi64.c',
+                             'powerpc/ppc-darwin.S',
+                             'powerpc/ppc-darwin_closure.S',
+                             'powerpc/ppc-ffi_darwin.c',
+                             'powerpc/ppc64-darwin_closure.S',
+                             ]]
+
+        # Add .S (preprocessed assembly) to C compiler source extensions.
+        self.compiler.src_extensions.append('.S')
+
+        include_dirs = [os.path.join(ffi_srcdir, 'include'),
+                        os.path.join(ffi_srcdir, 'powerpc')]
+        ext.include_dirs.extend(include_dirs)
+        ext.sources.extend(sources)
+        return True
+
+    def configure_ctypes(self, ext):
+        if not self.use_system_libffi:
+            if host_platform == 'darwin':
+                return self.configure_ctypes_darwin(ext)
+
+            srcdir = sysconfig.get_config_var('srcdir')
+            ffi_builddir = os.path.join(self.build_temp, 'libffi')
+            ffi_srcdir = os.path.abspath(os.path.join(srcdir, 'Modules',
+                                         '_ctypes', 'libffi'))
+            ffi_configfile = os.path.join(ffi_builddir, 'fficonfig.py')
+
+            from distutils.dep_util import newer_group
+
+            config_sources = [os.path.join(ffi_srcdir, fname)
+                              for fname in os.listdir(ffi_srcdir)
+                              if os.path.isfile(os.path.join(ffi_srcdir, fname))]
+            if self.force or newer_group(config_sources,
+                                         ffi_configfile):
+                from distutils.dir_util import mkpath
+                mkpath(ffi_builddir)
+                config_args = [arg for arg in sysconfig.get_config_var("CONFIG_ARGS").split()
+                               if (('--host=' in arg) or ('--build=' in arg))]
+                if not self.verbose:
+                    config_args.append("-q")
+
+                # Pass empty CFLAGS because we'll just append the resulting
+                # CFLAGS to Python's; -g or -O2 is to be avoided.
+                if cross_compiling:
+                    cmd = "cd %s && env CFLAGS='' '%s/configure' --host=%s --build=%s %s" \
+                          % (ffi_builddir, ffi_srcdir, os.environ.get('HOSTARCH'),
+                             os.environ.get('BUILDARCH'), " ".join(config_args))
+                else:
+                    cmd = "cd %s && env CFLAGS='' '%s/configure' %s" \
+                          % (ffi_builddir, ffi_srcdir, " ".join(config_args))
+
+                res = os.system(cmd)
+                if res or not os.path.exists(ffi_configfile):
+                    print "Failed to configure _ctypes module"
+                    return False
+
+            fficonfig = {}
+            with open(ffi_configfile) as f:
+                exec f in fficonfig
+
+            # Add .S (preprocessed assembly) to C compiler source extensions.
+            self.compiler.src_extensions.append('.S')
+
+            include_dirs = [os.path.join(ffi_builddir, 'include'),
+                            ffi_builddir,
+                            os.path.join(ffi_srcdir, 'src')]
+            extra_compile_args = fficonfig['ffi_cflags'].split()
+
+            ext.sources.extend(os.path.join(ffi_srcdir, f) for f in
+                               fficonfig['ffi_sources'])
+            ext.include_dirs.extend(include_dirs)
+            ext.extra_compile_args.extend(extra_compile_args)
+        return True
+
+    def detect_ctypes(self, inc_dirs, lib_dirs):
+        self.use_system_libffi = False
+        include_dirs = []
+        extra_compile_args = []
+        extra_link_args = []
+        sources = ['_ctypes/_ctypes.c',
+                   '_ctypes/callbacks.c',
+                   '_ctypes/callproc.c',
+                   '_ctypes/stgdict.c',
+                   '_ctypes/cfield.c']
+        depends = ['_ctypes/ctypes.h']
+
+        if host_platform == 'darwin':
+            sources.append('_ctypes/malloc_closure.c')
+            sources.append('_ctypes/darwin/dlfcn_simple.c')
+            extra_compile_args.append('-DMACOSX')
+            include_dirs.append('_ctypes/darwin')
+# XXX Is this still needed?
+##            extra_link_args.extend(['-read_only_relocs', 'warning'])
+
+        elif host_platform == 'sunos5':
+            # XXX This shouldn't be necessary; it appears that some
+            # of the assembler code is non-PIC (i.e. it has relocations
+            # when it shouldn't. The proper fix would be to rewrite
+            # the assembler code to be PIC.
+            # This only works with GCC; the Sun compiler likely refuses
+            # this option. If you want to compile ctypes with the Sun
+            # compiler, please research a proper solution, instead of
+            # finding some -z option for the Sun compiler.
+            extra_link_args.append('-mimpure-text')
+
+        elif host_platform.startswith('hp-ux'):
+            extra_link_args.append('-fPIC')
+
+        ext = Extension('_ctypes',
+                        include_dirs=include_dirs,
+                        extra_compile_args=extra_compile_args,
+                        extra_link_args=extra_link_args,
+                        libraries=[],
+                        sources=sources,
+                        depends=depends)
+        ext_test = Extension('_ctypes_test',
+                             sources=['_ctypes/_ctypes_test.c'])
+        self.extensions.extend([ext, ext_test])
+
+        if not '--with-system-ffi' in sysconfig.get_config_var("CONFIG_ARGS"):
+            return
+
+        if host_platform == 'darwin':
+            # OS X 10.5 comes with libffi.dylib; the include files are
+            # in /usr/include/ffi
+            inc_dirs.append('/usr/include/ffi')
+
+        ffi_inc = [sysconfig.get_config_var("LIBFFI_INCLUDEDIR")]
+        if not ffi_inc or ffi_inc[0] == '':
+            ffi_inc = find_file('ffi.h', [], inc_dirs)
+        if ffi_inc is not None:
+            ffi_h = ffi_inc[0] + '/ffi.h'
+            with open(ffi_h) as f:
+                for line in f:
+                    line = line.strip()
+                    if line.startswith(('#define LIBFFI_H',
+                                        '#define ffi_wrapper_h')):
+                        break
+                else:
+                    ffi_inc = None
+                    print('Header file {} does not define LIBFFI_H or '
+                          'ffi_wrapper_h'.format(ffi_h))
+        ffi_lib = None
+        if ffi_inc is not None:
+            for lib_name in ('ffi_convenience', 'ffi_pic', 'ffi'):
+                if (self.compiler.find_library_file(lib_dirs, lib_name)):
+                    ffi_lib = lib_name
+                    break
+
+        if ffi_inc and ffi_lib:
+            ext.include_dirs.extend(ffi_inc)
+            ext.libraries.append(ffi_lib)
+            self.use_system_libffi = True
+
+        if sysconfig.get_config_var('HAVE_LIBDL'):
+            # for dlopen, see bpo-32647
+            ext.libraries.append('dl')
+
+    def _detect_nis(self, inc_dirs, lib_dirs):
+        if host_platform in {'win32', 'cygwin', 'qnx6'}:
+            return None
+
+        libs = []
+        library_dirs = []
+        includes_dirs = []
+
+        # bpo-32521: glibc has deprecated Sun RPC for some time. Fedora 28
+        # moved headers and libraries to libtirpc and libnsl. The headers
+        # are in tircp and nsl sub directories.
+        rpcsvc_inc = find_file(
+            'rpcsvc/yp_prot.h', inc_dirs,
+            [os.path.join(inc_dir, 'nsl') for inc_dir in inc_dirs]
+        )
+        rpc_inc = find_file(
+            'rpc/rpc.h', inc_dirs,
+            [os.path.join(inc_dir, 'tirpc') for inc_dir in inc_dirs]
+        )
+        if rpcsvc_inc is None or rpc_inc is None:
+            # not found
+            return None
+        includes_dirs.extend(rpcsvc_inc)
+        includes_dirs.extend(rpc_inc)
+
+        if self.compiler.find_library_file(lib_dirs, 'nsl'):
+            libs.append('nsl')
+        else:
+            # libnsl-devel: check for libnsl in nsl/ subdirectory
+            nsl_dirs = [os.path.join(lib_dir, 'nsl') for lib_dir in lib_dirs]
+            libnsl = self.compiler.find_library_file(nsl_dirs, 'nsl')
+            if libnsl is not None:
+                library_dirs.append(os.path.dirname(libnsl))
+                libs.append('nsl')
+
+        if self.compiler.find_library_file(lib_dirs, 'tirpc'):
+            libs.append('tirpc')
+
+        return Extension(
+            'nis', ['nismodule.c'],
+            libraries=libs,
+            library_dirs=library_dirs,
+            include_dirs=includes_dirs
+        )
+
+
+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')
+
+SUMMARY = """
+Python is an interpreted, interactive, object-oriented programming
+language. It is often compared to Tcl, Perl, Scheme or Java.
+
+Python combines remarkable power with very clear syntax. It has
+modules, classes, exceptions, very high level dynamic data types, and
+dynamic typing. There are interfaces to many system calls and
+libraries, as well as to various windowing systems (X11, Motif, Tk,
+Mac, MFC). New built-in modules are easily written in C or C++. Python
+is also usable as an extension language for applications that need a
+programmable interface.
+
+The Python implementation is portable: it runs on many brands of UNIX,
+on Windows, DOS, OS/2, Mac, Amiga... If your favorite system isn't
+listed here, it may still be supported, if there's a C compiler for
+it. Ask around on comp.lang.python -- or just try compiling Python
+yourself.
+"""
+
+CLASSIFIERS = """
+Development Status :: 6 - Mature
+License :: OSI Approved :: Python Software Foundation License
+Natural Language :: English
+Programming Language :: C
+Programming Language :: Python
+Topic :: Software Development
+"""
+
+def main():
+    # turn off warnings when deprecated modules are imported
+    import warnings
+    warnings.filterwarnings("ignore",category=DeprecationWarning)
+    setup(# PyPI Metadata (PEP 301)
+          name = "Python",
+          version = sys.version.split()[0],
+          url = "http://www.python.org/%s" % sys.version[:3],
+          maintainer = "Guido van Rossum and the Python community",
+          maintainer_email = "python-dev@python.org",
+          description = "A high-level object-oriented programming language",
+          long_description = SUMMARY.strip(),
+          license = "PSF license",
+          classifiers = filter(None, CLASSIFIERS.split("\n")),
+          platforms = ["Many"],
+
+          # Build info
+          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', ['_struct.c'])],
+
+          # Scripts to install
+          scripts = ['Tools/scripts/pydoc', 'Tools/scripts/idle',
+                     'Tools/scripts/2to3',
+                     'Lib/smtpd.py']
+        )
+
+# --install-platlib
+if __name__ == '__main__':
+    main()