Commits

Philip Jenvey committed cfa2d06

restore the sysconfig_pypy usage

Comments (0)

Files changed (2)

lib-python/3/distutils/sysconfig.py

 Email:        <fdrake@acm.org>
 """
 
-import os
-import re
 import sys
 
-from .errors import DistutilsPlatformError
 
-# These are needed in a couple of spots, so just compute them once.
-PREFIX = os.path.normpath(sys.prefix)
-EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
-BASE_PREFIX = os.path.normpath(sys.base_prefix)
-BASE_EXEC_PREFIX = os.path.normpath(sys.base_exec_prefix)
+# The content of this file is redirected from
+# sysconfig_cpython or sysconfig_pypy.
 
-# Path to the base directory of the project. On Windows the binary may
-# live in project/PCBuild9.  If we're dealing with an x64 Windows build,
-# it'll live in project/PCbuild/amd64.
-# set for cross builds
-if "_PYTHON_PROJECT_BASE" in os.environ:
-    project_base = os.path.abspath(os.environ["_PYTHON_PROJECT_BASE"])
+if '__pypy__' in sys.builtin_module_names:
+    from distutils.sysconfig_pypy import *
+    from distutils.sysconfig_pypy import _config_vars # needed by setuptools
+    from distutils.sysconfig_pypy import _variable_rx # read_setup_file()
 else:
-    project_base = os.path.dirname(os.path.abspath(sys.executable))
-if os.name == "nt" and "pcbuild" in project_base[-8:].lower():
-    project_base = os.path.abspath(os.path.join(project_base, os.path.pardir))
-# PC/VS7.1
-if os.name == "nt" and "\\pc\\v" in project_base[-10:].lower():
-    project_base = os.path.abspath(os.path.join(project_base, os.path.pardir,
-                                                os.path.pardir))
-# PC/AMD64
-if os.name == "nt" and "\\pcbuild\\amd64" in project_base[-14:].lower():
-    project_base = os.path.abspath(os.path.join(project_base, os.path.pardir,
-                                                os.path.pardir))
-
-# python_build: (Boolean) if true, we're either building Python or
-# building an extension with an un-installed Python, so we use
-# different (hard-wired) directories.
-# Setup.local is available for Makefile builds including VPATH builds,
-# Setup.dist is available on Windows
-def _is_python_source_dir(d):
-    for fn in ("Setup.dist", "Setup.local"):
-        if os.path.isfile(os.path.join(d, "Modules", fn)):
-            return True
-    return False
-_sys_home = getattr(sys, '_home', None)
-if _sys_home and os.name == 'nt' and \
-    _sys_home.lower().endswith(('pcbuild', 'pcbuild\\amd64')):
-    _sys_home = os.path.dirname(_sys_home)
-    if _sys_home.endswith('pcbuild'):   # must be amd64
-        _sys_home = os.path.dirname(_sys_home)
-def _python_build():
-    if _sys_home:
-        return _is_python_source_dir(_sys_home)
-    return _is_python_source_dir(project_base)
-python_build = _python_build()
-
-# Calculate the build qualifier flags if they are defined.  Adding the flags
-# to the include and lib directories only makes sense for an installation, not
-# an in-source build.
-build_flags = ''
-try:
-    if not python_build:
-        build_flags = sys.abiflags
-except AttributeError:
-    # It's not a configure-based build, so the sys module doesn't have
-    # this attribute, which is fine.
-    pass
-
-def get_python_version():
-    """Return a string containing the major and minor Python version,
-    leaving off the patchlevel.  Sample return values could be '1.5'
-    or '2.2'.
-    """
-    return sys.version[:3]
-
-
-def get_python_inc(plat_specific=0, prefix=None):
-    """Return the directory containing installed Python header files.
-
-    If 'plat_specific' is false (the default), this is the path to the
-    non-platform-specific header files, i.e. Python.h and so on;
-    otherwise, this is the path to platform-specific header files
-    (namely pyconfig.h).
-
-    If 'prefix' is supplied, use it instead of sys.base_prefix or
-    sys.base_exec_prefix -- i.e., ignore 'plat_specific'.
-    """
-    if prefix is None:
-        prefix = plat_specific and BASE_EXEC_PREFIX or BASE_PREFIX
-    if os.name == "posix":
-        if python_build:
-            # Assume the executable is in the build directory.  The
-            # pyconfig.h file should be in the same directory.  Since
-            # the build directory may not be the source directory, we
-            # must use "srcdir" from the makefile to find the "Include"
-            # directory.
-            base = _sys_home or project_base
-            if plat_specific:
-                return base
-            if _sys_home:
-                incdir = os.path.join(_sys_home, get_config_var('AST_H_DIR'))
-            else:
-                incdir = os.path.join(get_config_var('srcdir'), 'Include')
-            return os.path.normpath(incdir)
-        python_dir = 'python' + get_python_version() + build_flags
-        return os.path.join(prefix, "include", python_dir)
-    elif os.name == "nt":
-        return os.path.join(prefix, "include")
-    elif os.name == "os2":
-        return os.path.join(prefix, "Include")
-    else:
-        raise DistutilsPlatformError(
-            "I don't know where Python installs its C header files "
-            "on platform '%s'" % os.name)
-
-
-def get_python_lib(plat_specific=0, standard_lib=0, prefix=None):
-    """Return the directory containing the Python library (standard or
-    site additions).
-
-    If 'plat_specific' is true, return the directory containing
-    platform-specific modules, i.e. any module from a non-pure-Python
-    module distribution; otherwise, return the platform-shared library
-    directory.  If 'standard_lib' is true, return the directory
-    containing standard Python library modules; otherwise, return the
-    directory for site-specific modules.
-
-    If 'prefix' is supplied, use it instead of sys.base_prefix or
-    sys.base_exec_prefix -- i.e., ignore 'plat_specific'.
-    """
-    if prefix is None:
-        if standard_lib:
-            prefix = plat_specific and BASE_EXEC_PREFIX or BASE_PREFIX
-        else:
-            prefix = plat_specific and EXEC_PREFIX or PREFIX
-
-    if os.name == "posix":
-        libpython = os.path.join(prefix,
-                                 "lib", "python" + get_python_version())
-        if standard_lib:
-            return libpython
-        else:
-            return os.path.join(libpython, "site-packages")
-    elif os.name == "nt":
-        if standard_lib:
-            return os.path.join(prefix, "Lib")
-        else:
-            if get_python_version() < "2.2":
-                return prefix
-            else:
-                return os.path.join(prefix, "Lib", "site-packages")
-    elif os.name == "os2":
-        if standard_lib:
-            return os.path.join(prefix, "Lib")
-        else:
-            return os.path.join(prefix, "Lib", "site-packages")
-    else:
-        raise DistutilsPlatformError(
-            "I don't know where Python installs its library "
-            "on platform '%s'" % os.name)
-
-
-
-def customize_compiler(compiler):
-    """Do any platform-specific customization of a CCompiler instance.
-
-    Mainly needed on Unix, so we can plug in the information that
-    varies across Unices and is stored in Python's Makefile.
-    """
-    if compiler.compiler_type == "unix":
-        if sys.platform == "darwin":
-            # Perform first-time customization of compiler-related
-            # config vars on OS X now that we know we need a compiler.
-            # This is primarily to support Pythons from binary
-            # installers.  The kind and paths to build tools on
-            # the user system may vary significantly from the system
-            # that Python itself was built on.  Also the user OS
-            # version and build tools may not support the same set
-            # of CPU architectures for universal builds.
-            global _config_vars
-            if not _config_vars.get('CUSTOMIZED_OSX_COMPILER', ''):
-                import _osx_support
-                _osx_support.customize_compiler(_config_vars)
-                _config_vars['CUSTOMIZED_OSX_COMPILER'] = 'True'
-
-        (cc, cxx, opt, cflags, ccshared, ldshared, shlib_suffix, ar, ar_flags) = \
-            get_config_vars('CC', 'CXX', 'OPT', 'CFLAGS',
-                            'CCSHARED', 'LDSHARED', 'SHLIB_SUFFIX', 'AR', 'ARFLAGS')
-
-        if 'CC' in os.environ:
-            newcc = os.environ['CC']
-            if (sys.platform == 'darwin'
-                    and 'LDSHARED' not in os.environ
-                    and ldshared.startswith(cc)):
-                # On OS X, if CC is overridden, use that as the default
-                #       command for LDSHARED as well
-                ldshared = newcc + ldshared[len(cc):]
-            cc = newcc
-        if 'CXX' in os.environ:
-            cxx = os.environ['CXX']
-        if 'LDSHARED' in os.environ:
-            ldshared = os.environ['LDSHARED']
-        if 'CPP' in os.environ:
-            cpp = os.environ['CPP']
-        else:
-            cpp = cc + " -E"           # not always
-        if 'LDFLAGS' in os.environ:
-            ldshared = ldshared + ' ' + os.environ['LDFLAGS']
-        if 'CFLAGS' in os.environ:
-            cflags = opt + ' ' + os.environ['CFLAGS']
-            ldshared = ldshared + ' ' + os.environ['CFLAGS']
-        if 'CPPFLAGS' in os.environ:
-            cpp = cpp + ' ' + os.environ['CPPFLAGS']
-            cflags = cflags + ' ' + os.environ['CPPFLAGS']
-            ldshared = ldshared + ' ' + os.environ['CPPFLAGS']
-        if 'AR' in os.environ:
-            ar = os.environ['AR']
-        if 'ARFLAGS' in os.environ:
-            archiver = ar + ' ' + os.environ['ARFLAGS']
-        else:
-            archiver = ar + ' ' + ar_flags
-
-        cc_cmd = cc + ' ' + cflags
-        compiler.set_executables(
-            preprocessor=cpp,
-            compiler=cc_cmd,
-            compiler_so=cc_cmd + ' ' + ccshared,
-            compiler_cxx=cxx,
-            linker_so=ldshared,
-            linker_exe=cc,
-            archiver=archiver)
-
-        compiler.shared_lib_extension = shlib_suffix
-
-
-def get_config_h_filename():
-    """Return full pathname of installed pyconfig.h file."""
-    if python_build:
-        if os.name == "nt":
-            inc_dir = os.path.join(_sys_home or project_base, "PC")
-        else:
-            inc_dir = _sys_home or project_base
-    else:
-        inc_dir = get_python_inc(plat_specific=1)
-    if get_python_version() < '2.2':
-        config_h = 'config.h'
-    else:
-        # The name of the config.h file changed in 2.2
-        config_h = 'pyconfig.h'
-    return os.path.join(inc_dir, config_h)
-
-
-def get_makefile_filename():
-    """Return full pathname of installed Makefile from the Python build."""
-    if python_build:
-        return os.path.join(_sys_home or project_base, "Makefile")
-    lib_dir = get_python_lib(plat_specific=0, standard_lib=1)
-    config_file = 'config-{}{}'.format(get_python_version(), build_flags)
-    return os.path.join(lib_dir, config_file, 'Makefile')
-
-
-def parse_config_h(fp, g=None):
-    """Parse a config.h-style file.
-
-    A dictionary containing name/value pairs is returned.  If an
-    optional dictionary is passed in as the second argument, it is
-    used instead of a new dictionary.
-    """
-    if g is None:
-        g = {}
-    define_rx = re.compile("#define ([A-Z][A-Za-z0-9_]+) (.*)\n")
-    undef_rx = re.compile("/[*] #undef ([A-Z][A-Za-z0-9_]+) [*]/\n")
-    #
-    while True:
-        line = fp.readline()
-        if not line:
-            break
-        m = define_rx.match(line)
-        if m:
-            n, v = m.group(1, 2)
-            try: v = int(v)
-            except ValueError: pass
-            g[n] = v
-        else:
-            m = undef_rx.match(line)
-            if m:
-                g[m.group(1)] = 0
-    return g
-
-
-# Regexes needed for parsing Makefile (and similar syntaxes,
-# like old-style Setup files).
-_variable_rx = re.compile("([a-zA-Z][a-zA-Z0-9_]+)\s*=\s*(.*)")
-_findvar1_rx = re.compile(r"\$\(([A-Za-z][A-Za-z0-9_]*)\)")
-_findvar2_rx = re.compile(r"\${([A-Za-z][A-Za-z0-9_]*)}")
-
-def parse_makefile(fn, g=None):
-    """Parse a Makefile-style file.
-
-    A dictionary containing name/value pairs is returned.  If an
-    optional dictionary is passed in as the second argument, it is
-    used instead of a new dictionary.
-    """
-    from distutils.text_file import TextFile
-    fp = TextFile(fn, strip_comments=1, skip_blanks=1, join_lines=1, errors="surrogateescape")
-
-    if g is None:
-        g = {}
-    done = {}
-    notdone = {}
-
-    while True:
-        line = fp.readline()
-        if line is None: # eof
-            break
-        m = _variable_rx.match(line)
-        if m:
-            n, v = m.group(1, 2)
-            v = v.strip()
-            # `$$' is a literal `$' in make
-            tmpv = v.replace('$$', '')
-
-            if "$" in tmpv:
-                notdone[n] = v
-            else:
-                try:
-                    v = int(v)
-                except ValueError:
-                    # insert literal `$'
-                    done[n] = v.replace('$$', '$')
-                else:
-                    done[n] = v
-
-    # Variables with a 'PY_' prefix in the makefile. These need to
-    # be made available without that prefix through sysconfig.
-    # Special care is needed to ensure that variable expansion works, even
-    # if the expansion uses the name without a prefix.
-    renamed_variables = ('CFLAGS', 'LDFLAGS', 'CPPFLAGS')
-
-    # do variable interpolation here
-    while notdone:
-        for name in list(notdone):
-            value = notdone[name]
-            m = _findvar1_rx.search(value) or _findvar2_rx.search(value)
-            if m:
-                n = m.group(1)
-                found = True
-                if n in done:
-                    item = str(done[n])
-                elif n in notdone:
-                    # get it on a subsequent round
-                    found = False
-                elif n in os.environ:
-                    # do it like make: fall back to environment
-                    item = os.environ[n]
-
-                elif n in renamed_variables:
-                    if name.startswith('PY_') and name[3:] in renamed_variables:
-                        item = ""
-
-                    elif 'PY_' + n in notdone:
-                        found = False
-
-                    else:
-                        item = str(done['PY_' + n])
-                else:
-                    done[n] = item = ""
-                if found:
-                    after = value[m.end():]
-                    value = value[:m.start()] + item + after
-                    if "$" in after:
-                        notdone[name] = value
-                    else:
-                        try: value = int(value)
-                        except ValueError:
-                            done[name] = value.strip()
-                        else:
-                            done[name] = value
-                        del notdone[name]
-
-                        if name.startswith('PY_') \
-                            and name[3:] in renamed_variables:
-
-                            name = name[3:]
-                            if name not in done:
-                                done[name] = value
-            else:
-                # bogus variable reference; just drop it since we can't deal
-                del notdone[name]
-
-    fp.close()
-
-    # strip spurious spaces
-    for k, v in done.items():
-        if isinstance(v, str):
-            done[k] = v.strip()
-
-    # save the results in the global dictionary
-    g.update(done)
-    return g
-
-
-def expand_makefile_vars(s, vars):
-    """Expand Makefile-style variables -- "${foo}" or "$(foo)" -- in
-    'string' according to 'vars' (a dictionary mapping variable names to
-    values).  Variables not present in 'vars' are silently expanded to the
-    empty string.  The variable values in 'vars' should not contain further
-    variable expansions; if 'vars' is the output of 'parse_makefile()',
-    you're fine.  Returns a variable-expanded version of 's'.
-    """
-
-    # This algorithm does multiple expansion, so if vars['foo'] contains
-    # "${bar}", it will expand ${foo} to ${bar}, and then expand
-    # ${bar}... and so forth.  This is fine as long as 'vars' comes from
-    # 'parse_makefile()', which takes care of such expansions eagerly,
-    # according to make's variable expansion semantics.
-
-    while True:
-        m = _findvar1_rx.search(s) or _findvar2_rx.search(s)
-        if m:
-            (beg, end) = m.span()
-            s = s[0:beg] + vars.get(m.group(1)) + s[end:]
-        else:
-            break
-    return s
-
-
-_config_vars = None
-
-def _init_posix():
-    """Initialize the module as appropriate for POSIX systems."""
-    g = {}
-    # load the installed Makefile:
-    try:
-        filename = get_makefile_filename()
-        parse_makefile(filename, g)
-    except IOError as msg:
-        my_msg = "invalid Python installation: unable to open %s" % filename
-        if hasattr(msg, "strerror"):
-            my_msg = my_msg + " (%s)" % msg.strerror
-
-        raise DistutilsPlatformError(my_msg)
-
-    # load the installed pyconfig.h:
-    try:
-        filename = get_config_h_filename()
-        with open(filename) as file:
-            parse_config_h(file, g)
-    except IOError as msg:
-        my_msg = "invalid Python installation: unable to open %s" % filename
-        if hasattr(msg, "strerror"):
-            my_msg = my_msg + " (%s)" % msg.strerror
-
-        raise DistutilsPlatformError(my_msg)
-
-    # On AIX, there are wrong paths to the linker scripts in the Makefile
-    # -- these paths are relative to the Python source, but when installed
-    # the scripts are in another directory.
-    if python_build:
-        g['LDSHARED'] = g['BLDSHARED']
-
-    elif get_python_version() < '2.1':
-        # The following two branches are for 1.5.2 compatibility.
-        if sys.platform == 'aix4':          # what about AIX 3.x ?
-            # Linker script is in the config directory, not in Modules as the
-            # Makefile says.
-            python_lib = get_python_lib(standard_lib=1)
-            ld_so_aix = os.path.join(python_lib, 'config', 'ld_so_aix')
-            python_exp = os.path.join(python_lib, 'config', 'python.exp')
-
-            g['LDSHARED'] = "%s %s -bI:%s" % (ld_so_aix, g['CC'], python_exp)
-
-    global _config_vars
-    _config_vars = g
-
-
-def _init_nt():
-    """Initialize the module as appropriate for NT"""
-    g = {}
-    # set basic install directories
-    g['LIBDEST'] = get_python_lib(plat_specific=0, standard_lib=1)
-    g['BINLIBDEST'] = get_python_lib(plat_specific=1, standard_lib=1)
-
-    # XXX hmmm.. a normal install puts include files here
-    g['INCLUDEPY'] = get_python_inc(plat_specific=0)
-
-    g['SO'] = '.pyd'
-    g['EXT_SUFFIX'] = '.pyd'
-    g['EXE'] = ".exe"
-    g['VERSION'] = get_python_version().replace(".", "")
-    g['BINDIR'] = os.path.dirname(os.path.abspath(sys.executable))
-
-    global _config_vars
-    _config_vars = g
-
-
-def _init_os2():
-    """Initialize the module as appropriate for OS/2"""
-    g = {}
-    # set basic install directories
-    g['LIBDEST'] = get_python_lib(plat_specific=0, standard_lib=1)
-    g['BINLIBDEST'] = get_python_lib(plat_specific=1, standard_lib=1)
-
-    # XXX hmmm.. a normal install puts include files here
-    g['INCLUDEPY'] = get_python_inc(plat_specific=0)
-
-    g['SO'] = '.pyd'
-    g['EXT_SUFFIX'] = '.pyd'
-    g['EXE'] = ".exe"
-
-    global _config_vars
-    _config_vars = g
-
-
-def get_config_vars(*args):
-    """With no arguments, return a dictionary of all configuration
-    variables relevant for the current platform.  Generally this includes
-    everything needed to build extensions and install both pure modules and
-    extensions.  On Unix, this means every variable defined in Python's
-    installed Makefile; on Windows it's a much smaller set.
-
-    With arguments, return a list of values that result from looking up
-    each argument in the configuration variable dictionary.
-    """
-    global _config_vars
-    if _config_vars is None:
-        func = globals().get("_init_" + os.name)
-        if func:
-            func()
-        else:
-            _config_vars = {}
-
-        # Normalized versions of prefix and exec_prefix are handy to have;
-        # in fact, these are the standard versions used most places in the
-        # Distutils.
-        _config_vars['prefix'] = PREFIX
-        _config_vars['exec_prefix'] = EXEC_PREFIX
-
-        # Always convert srcdir to an absolute path
-        srcdir = _config_vars.get('srcdir', project_base)
-        if os.name == 'posix':
-            if python_build:
-                # If srcdir is a relative path (typically '.' or '..')
-                # then it should be interpreted relative to the directory
-                # containing Makefile.
-                base = os.path.dirname(get_makefile_filename())
-                srcdir = os.path.join(base, srcdir)
-            else:
-                # srcdir is not meaningful since the installation is
-                # spread about the filesystem.  We choose the
-                # directory containing the Makefile since we know it
-                # exists.
-                srcdir = os.path.dirname(get_makefile_filename())
-        _config_vars['srcdir'] = os.path.abspath(os.path.normpath(srcdir))
-
-        # Convert srcdir into an absolute path if it appears necessary.
-        # Normally it is relative to the build directory.  However, during
-        # testing, for example, we might be running a non-installed python
-        # from a different directory.
-        if python_build and os.name == "posix":
-            base = project_base
-            if (not os.path.isabs(_config_vars['srcdir']) and
-                base != os.getcwd()):
-                # srcdir is relative and we are not in the same directory
-                # as the executable. Assume executable is in the build
-                # directory and make srcdir absolute.
-                srcdir = os.path.join(base, _config_vars['srcdir'])
-                _config_vars['srcdir'] = os.path.normpath(srcdir)
-
-        # OS X platforms require special customization to handle
-        # multi-architecture, multi-os-version installers
-        if sys.platform == 'darwin':
-            import _osx_support
-            _osx_support.customize_config_vars(_config_vars)
-
-    if args:
-        vals = []
-        for name in args:
-            vals.append(_config_vars.get(name))
-        return vals
-    else:
-        return _config_vars
-
-def get_config_var(name):
-    """Return the value of a single variable using the dictionary
-    returned by 'get_config_vars()'.  Equivalent to
-    get_config_vars().get(name)
-    """
-    return get_config_vars().get(name)
+    from distutils.sysconfig_cpython import *
+    from distutils.sysconfig_cpython import _config_vars # needed by setuptools
+    from distutils.sysconfig_cpython import _variable_rx # read_setup_file()

lib-python/3/distutils/sysconfig_cpython.py

 # These are needed in a couple of spots, so just compute them once.
 PREFIX = os.path.normpath(sys.prefix)
 EXEC_PREFIX = os.path.normpath(sys.exec_prefix)
+BASE_PREFIX = os.path.normpath(sys.base_prefix)
+BASE_EXEC_PREFIX = os.path.normpath(sys.base_exec_prefix)
 
 # Path to the base directory of the project. On Windows the binary may
 # live in project/PCBuild9.  If we're dealing with an x64 Windows build,
 # it'll live in project/PCbuild/amd64.
-project_base = os.path.dirname(os.path.abspath(sys.executable))
+# set for cross builds
+if "_PYTHON_PROJECT_BASE" in os.environ:
+    project_base = os.path.abspath(os.environ["_PYTHON_PROJECT_BASE"])
+else:
+    project_base = os.path.dirname(os.path.abspath(sys.executable))
 if os.name == "nt" and "pcbuild" in project_base[-8:].lower():
     project_base = os.path.abspath(os.path.join(project_base, os.path.pardir))
 # PC/VS7.1
 # different (hard-wired) directories.
 # Setup.local is available for Makefile builds including VPATH builds,
 # Setup.dist is available on Windows
-def _python_build():
+def _is_python_source_dir(d):
     for fn in ("Setup.dist", "Setup.local"):
-        if os.path.isfile(os.path.join(project_base, "Modules", fn)):
+        if os.path.isfile(os.path.join(d, "Modules", fn)):
             return True
     return False
+_sys_home = getattr(sys, '_home', None)
+if _sys_home and os.name == 'nt' and \
+    _sys_home.lower().endswith(('pcbuild', 'pcbuild\\amd64')):
+    _sys_home = os.path.dirname(_sys_home)
+    if _sys_home.endswith('pcbuild'):   # must be amd64
+        _sys_home = os.path.dirname(_sys_home)
+def _python_build():
+    if _sys_home:
+        return _is_python_source_dir(_sys_home)
+    return _is_python_source_dir(project_base)
 python_build = _python_build()
 
 # Calculate the build qualifier flags if they are defined.  Adding the flags
     otherwise, this is the path to platform-specific header files
     (namely pyconfig.h).
 
-    If 'prefix' is supplied, use it instead of sys.prefix or
-    sys.exec_prefix -- i.e., ignore 'plat_specific'.
+    If 'prefix' is supplied, use it instead of sys.base_prefix or
+    sys.base_exec_prefix -- i.e., ignore 'plat_specific'.
     """
     if prefix is None:
-        prefix = plat_specific and EXEC_PREFIX or PREFIX
+        prefix = plat_specific and BASE_EXEC_PREFIX or BASE_PREFIX
     if os.name == "posix":
         if python_build:
             # Assume the executable is in the build directory.  The
             # the build directory may not be the source directory, we
             # must use "srcdir" from the makefile to find the "Include"
             # directory.
-            base = os.path.dirname(os.path.abspath(sys.executable))
+            base = _sys_home or project_base
             if plat_specific:
                 return base
+            if _sys_home:
+                incdir = os.path.join(_sys_home, get_config_var('AST_H_DIR'))
             else:
                 incdir = os.path.join(get_config_var('srcdir'), 'Include')
-                return os.path.normpath(incdir)
+            return os.path.normpath(incdir)
         python_dir = 'python' + get_python_version() + build_flags
         return os.path.join(prefix, "include", python_dir)
     elif os.name == "nt":
     containing standard Python library modules; otherwise, return the
     directory for site-specific modules.
 
-    If 'prefix' is supplied, use it instead of sys.prefix or
-    sys.exec_prefix -- i.e., ignore 'plat_specific'.
+    If 'prefix' is supplied, use it instead of sys.base_prefix or
+    sys.base_exec_prefix -- i.e., ignore 'plat_specific'.
     """
     if prefix is None:
-        prefix = plat_specific and EXEC_PREFIX or PREFIX
+        if standard_lib:
+            prefix = plat_specific and BASE_EXEC_PREFIX or BASE_PREFIX
+        else:
+            prefix = plat_specific and EXEC_PREFIX or PREFIX
 
     if os.name == "posix":
         libpython = os.path.join(prefix,
             "I don't know where Python installs its library "
             "on platform '%s'" % os.name)
 
-_USE_CLANG = None
+
 
 def customize_compiler(compiler):
     """Do any platform-specific customization of a CCompiler instance.
     varies across Unices and is stored in Python's Makefile.
     """
     if compiler.compiler_type == "unix":
-        (cc, cxx, opt, cflags, ccshared, ldshared, so_ext, ar, ar_flags) = \
+        if sys.platform == "darwin":
+            # Perform first-time customization of compiler-related
+            # config vars on OS X now that we know we need a compiler.
+            # This is primarily to support Pythons from binary
+            # installers.  The kind and paths to build tools on
+            # the user system may vary significantly from the system
+            # that Python itself was built on.  Also the user OS
+            # version and build tools may not support the same set
+            # of CPU architectures for universal builds.
+            global _config_vars
+            if not _config_vars.get('CUSTOMIZED_OSX_COMPILER', ''):
+                import _osx_support
+                _osx_support.customize_compiler(_config_vars)
+                _config_vars['CUSTOMIZED_OSX_COMPILER'] = 'True'
+
+        (cc, cxx, opt, cflags, ccshared, ldshared, shlib_suffix, ar, ar_flags) = \
             get_config_vars('CC', 'CXX', 'OPT', 'CFLAGS',
-                            'CCSHARED', 'LDSHARED', 'SO', 'AR', 'ARFLAGS')
+                            'CCSHARED', 'LDSHARED', 'SHLIB_SUFFIX', 'AR', 'ARFLAGS')
 
-        newcc = None
         if 'CC' in os.environ:
             newcc = os.environ['CC']
-        elif sys.platform == 'darwin' and cc == 'gcc-4.2':
-            # Issue #13590:
-            #       Since Apple removed gcc-4.2 in Xcode 4.2, we can no
-            #       longer assume it is available for extension module builds.
-            #       If Python was built with gcc-4.2, check first to see if
-            #       it is available on this system; if not, try to use clang
-            #       instead unless the caller explicitly set CC.
-            global _USE_CLANG
-            if _USE_CLANG is None:
-                from distutils import log
-                from subprocess import Popen, PIPE
-                p = Popen("! type gcc-4.2 && type clang && exit 2",
-                                shell=True, stdout=PIPE, stderr=PIPE)
-                p.wait()
-                if p.returncode == 2:
-                    _USE_CLANG = True
-                    log.warn("gcc-4.2 not found, using clang instead")
-                else:
-                    _USE_CLANG = False
-            if _USE_CLANG:
-                newcc = 'clang'
-        if newcc:
-            # On OS X, if CC is overridden, use that as the default
-            #       command for LDSHARED as well
             if (sys.platform == 'darwin'
                     and 'LDSHARED' not in os.environ
                     and ldshared.startswith(cc)):
+                # On OS X, if CC is overridden, use that as the default
+                #       command for LDSHARED as well
                 ldshared = newcc + ldshared[len(cc):]
             cc = newcc
         if 'CXX' in os.environ:
             linker_exe=cc,
             archiver=archiver)
 
-        compiler.shared_lib_extension = so_ext
+        compiler.shared_lib_extension = shlib_suffix
 
 
 def get_config_h_filename():
     """Return full pathname of installed pyconfig.h file."""
     if python_build:
         if os.name == "nt":
-            inc_dir = os.path.join(project_base, "PC")
+            inc_dir = os.path.join(_sys_home or project_base, "PC")
         else:
-            inc_dir = project_base
+            inc_dir = _sys_home or project_base
     else:
         inc_dir = get_python_inc(plat_specific=1)
     if get_python_version() < '2.2':
 def get_makefile_filename():
     """Return full pathname of installed Makefile from the Python build."""
     if python_build:
-        return os.path.join(os.path.dirname(sys.executable), "Makefile")
+        return os.path.join(_sys_home or project_base, "Makefile")
     lib_dir = get_python_lib(plat_specific=0, standard_lib=1)
     config_file = 'config-{}{}'.format(get_python_version(), build_flags)
     return os.path.join(lib_dir, config_file, 'Makefile')
     g['INCLUDEPY'] = get_python_inc(plat_specific=0)
 
     g['SO'] = '.pyd'
+    g['EXT_SUFFIX'] = '.pyd'
     g['EXE'] = ".exe"
     g['VERSION'] = get_python_version().replace(".", "")
     g['BINDIR'] = os.path.dirname(os.path.abspath(sys.executable))
     g['INCLUDEPY'] = get_python_inc(plat_specific=0)
 
     g['SO'] = '.pyd'
+    g['EXT_SUFFIX'] = '.pyd'
     g['EXE'] = ".exe"
 
     global _config_vars
     variables relevant for the current platform.  Generally this includes
     everything needed to build extensions and install both pure modules and
     extensions.  On Unix, this means every variable defined in Python's
-    installed Makefile; on Windows and Mac OS it's a much smaller set.
+    installed Makefile; on Windows it's a much smaller set.
 
     With arguments, return a list of values that result from looking up
     each argument in the configuration variable dictionary.
         _config_vars['prefix'] = PREFIX
         _config_vars['exec_prefix'] = EXEC_PREFIX
 
+        # Always convert srcdir to an absolute path
+        srcdir = _config_vars.get('srcdir', project_base)
+        if os.name == 'posix':
+            if python_build:
+                # If srcdir is a relative path (typically '.' or '..')
+                # then it should be interpreted relative to the directory
+                # containing Makefile.
+                base = os.path.dirname(get_makefile_filename())
+                srcdir = os.path.join(base, srcdir)
+            else:
+                # srcdir is not meaningful since the installation is
+                # spread about the filesystem.  We choose the
+                # directory containing the Makefile since we know it
+                # exists.
+                srcdir = os.path.dirname(get_makefile_filename())
+        _config_vars['srcdir'] = os.path.abspath(os.path.normpath(srcdir))
+
         # Convert srcdir into an absolute path if it appears necessary.
         # Normally it is relative to the build directory.  However, during
         # testing, for example, we might be running a non-installed python
         # from a different directory.
         if python_build and os.name == "posix":
-            base = os.path.dirname(os.path.abspath(sys.executable))
+            base = project_base
             if (not os.path.isabs(_config_vars['srcdir']) and
                 base != os.getcwd()):
                 # srcdir is relative and we are not in the same directory
                 srcdir = os.path.join(base, _config_vars['srcdir'])
                 _config_vars['srcdir'] = os.path.normpath(srcdir)
 
+        # OS X platforms require special customization to handle
+        # multi-architecture, multi-os-version installers
         if sys.platform == 'darwin':
-            kernel_version = os.uname()[2] # Kernel version (8.4.3)
-            major_version = int(kernel_version.split('.')[0])
-
-            if major_version < 8:
-                # On Mac OS X before 10.4, check if -arch and -isysroot
-                # are in CFLAGS or LDFLAGS and remove them if they are.
-                # This is needed when building extensions on a 10.3 system
-                # using a universal build of python.
-                for key in ('LDFLAGS', 'BASECFLAGS',
-                        # a number of derived variables. These need to be
-                        # patched up as well.
-                        'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
-                    flags = _config_vars[key]
-                    flags = re.sub('-arch\s+\w+\s', ' ', flags, re.ASCII)
-                    flags = re.sub('-isysroot [^ \t]*', ' ', flags)
-                    _config_vars[key] = flags
-
-            else:
-
-                # Allow the user to override the architecture flags using
-                # an environment variable.
-                # NOTE: This name was introduced by Apple in OSX 10.5 and
-                # is used by several scripting languages distributed with
-                # that OS release.
-
-                if 'ARCHFLAGS' in os.environ:
-                    arch = os.environ['ARCHFLAGS']
-                    for key in ('LDFLAGS', 'BASECFLAGS',
-                        # a number of derived variables. These need to be
-                        # patched up as well.
-                        'CFLAGS', 'PY_CFLAGS', 'BLDSHARED'):
-
-                        flags = _config_vars[key]
-                        flags = re.sub('-arch\s+\w+\s', ' ', flags)
-                        flags = flags + ' ' + arch
-                        _config_vars[key] = flags
+            import _osx_support
+            _osx_support.customize_config_vars(_config_vars)
 
     if args:
         vals = []