Initial commit of OpenSPARC T2 design and verification files.

[OpenSPARC-T2-DV] / tools / src / nas,5.n2.os.2 / lib / python / lib / python2.4 / distutils / sysconfig.py

"""Provide access to Python's configuration information.  The specific
configuration variables available depend heavily on the platform and
configuration.  The values may be retrieved using
get_config_var(name), and the list of variables is available via
get_config_vars().keys().  Additional convenience functions are also
available.

Written by:   Fred L. Drake, Jr.
Email:        <fdrake@acm.org>
"""

__revision__ = "$Id: sysconfig.py,v 1.61.2.1 2005/01/06 23:16:03 jackjansen Exp $"

import os
import re
import string
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)

# 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.

argv0_path = os.path.dirname(os.path.abspath(sys.executable))
landmark = os.path.join(argv0_path, "Modules", "Setup")

python_build = os.path.isfile(landmark)

del argv0_path, landmark


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.prefix or
   sys.exec_prefix -- i.e., ignore 'plat_specific'.
   """
   if prefix is None:
       prefix = plat_specific and EXEC_PREFIX or PREFIX
   if os.name == "posix":
       if python_build:
           base = os.path.dirname(os.path.abspath(sys.executable))
           if plat_specific:
               inc_dir = base
           else:
               inc_dir = os.path.join(base, "Include")
               if not os.path.exists(inc_dir):
                   inc_dir = os.path.join(os.path.dirname(base), "Include")
           return inc_dir
       return os.path.join(prefix, "include", "python" + sys.version[:3])
   elif os.name == "nt":
       return os.path.join(prefix, "include")
   elif os.name == "mac":
       if plat_specific:
           return os.path.join(prefix, "Mac", "Include")
       else:
           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.prefix or
   sys.exec_prefix -- i.e., ignore 'plat_specific'.
   """
   if prefix is None:
       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 sys.version < "2.2":
               return prefix
           else:
               return os.path.join(PREFIX, "Lib", "site-packages")

   elif os.name == "mac":
       if plat_specific:
           if standard_lib:
               return os.path.join(prefix, "Lib", "lib-dynload")
           else:
               return os.path.join(prefix, "Lib", "site-packages")
       else:
           if standard_lib:
               return os.path.join(prefix, "Lib")
           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":
       (cc, cxx, opt, basecflags, ccshared, ldshared, so_ext) = \
           get_config_vars('CC', 'CXX', 'OPT', 'BASECFLAGS', 'CCSHARED', 'LDSHARED', 'SO')

       if os.environ.has_key('CC'):
           cc = os.environ['CC']
       if os.environ.has_key('CXX'):
           cxx = os.environ['CXX']
       if os.environ.has_key('LDSHARED'):
           ldshared = os.environ['LDSHARED']
       if os.environ.has_key('CPP'):
           cpp = os.environ['CPP']
       else:
           cpp = cc + " -E"           # not always
       if os.environ.has_key('LDFLAGS'):
           ldshared = ldshared + ' ' + os.environ['LDFLAGS']
       if basecflags:
           opt = basecflags + ' ' + opt
       if os.environ.has_key('CFLAGS'):
           opt = opt + ' ' + os.environ['CFLAGS']
           ldshared = ldshared + ' ' + os.environ['CFLAGS']
       if os.environ.has_key('CPPFLAGS'):
           cpp = cpp + ' ' + os.environ['CPPFLAGS']
           opt = opt + ' ' + os.environ['CPPFLAGS']
           ldshared = ldshared + ' ' + os.environ['CPPFLAGS']

       cc_cmd = cc + ' ' + opt
       compiler.set_executables(
           preprocessor=cpp,
           compiler=cc_cmd,
           compiler_so=cc_cmd + ' ' + ccshared,
           compiler_cxx=cxx,
           linker_so=ldshared,
           linker_exe=cc)

       compiler.shared_lib_extension = so_ext


def get_config_h_filename():
   """Return full pathname of installed pyconfig.h file."""
   if python_build:
       inc_dir = os.curdir
   else:
       inc_dir = get_python_inc(plat_specific=1)
   if sys.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(os.path.dirname(sys.executable), "Makefile")
   lib_dir = get_python_lib(plat_specific=1, standard_lib=1)
   return os.path.join(lib_dir, "config", "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-Z0-9_]+) (.*)\n")
   undef_rx = re.compile("/[*] #undef ([A-Z][A-Z0-9_]+) [*]/\n")
   #
   while 1:
       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)

   if g is None:
       g = {}
   done = {}
   notdone = {}

   while 1:
       line = fp.readline()
       if line is None:                # eof
           break
       m = _variable_rx.match(line)
       if m:
           n, v = m.group(1, 2)
           v = string.strip(v)
           if "$" in v:
               notdone[n] = v
           else:
               try: v = int(v)
               except ValueError: pass
               done[n] = v

   # do variable interpolation here
   while notdone:
       for name in notdone.keys():
           value = notdone[name]
           m = _findvar1_rx.search(value) or _findvar2_rx.search(value)
           if m:
               n = m.group(1)
               if done.has_key(n):
                   after = value[m.end():]
                   value = value[:m.start()] + str(done[n]) + after
                   if "$" in after:
                       notdone[name] = value
                   else:
                       try: value = int(value)
                       except ValueError:
                           done[name] = string.strip(value)
                       else:
                           done[name] = value
                       del notdone[name]
               elif notdone.has_key(n):
                   # get it on a subsequent round
                   pass
               else:
                   done[n] = ""
                   after = value[m.end():]
                   value = value[:m.start()] + after
                   if "$" in after:
                       notdone[name] = value
                   else:
                       try: value = int(value)
                       except ValueError:
                           done[name] = string.strip(value)
                       else:
                           done[name] = value
                       del notdone[name]
           else:
               # bogus variable reference; just drop it since we can't deal
               del notdone[name]

   fp.close()

   # 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 1:
       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, 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 MacOSX we need to check the setting of the environment variable
   # MACOSX_DEPLOYMENT_TARGET: configure bases some choices on it so
   # it needs to be compatible.
   # If it isn't set we set it to the configure-time value
   if sys.platform == 'darwin' and g.has_key('CONFIGURE_MACOSX_DEPLOYMENT_TARGET'):
       cfg_target = g['CONFIGURE_MACOSX_DEPLOYMENT_TARGET']
       cur_target = os.getenv('MACOSX_DEPLOYMENT_TARGET', '')
       if cur_target == '':
           cur_target = cfg_target
           os.putenv('MACOSX_DEPLOYMENT_TARGET', cfg_target)
       if cfg_target != cur_target:
           my_msg = ('$MACOSX_DEPLOYMENT_TARGET mismatch: now "%s" but "%s" during configure'
               % (cur_target, cfg_target))
           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 sys.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)

       elif sys.platform == 'beos':
           # Linker script is in the config directory.  In the Makefile it is
           # relative to the srcdir, which after installation no longer makes
           # sense.
           python_lib = get_python_lib(standard_lib=1)
           linkerscript_path = string.split(g['LDSHARED'])[0]
           linkerscript_name = os.path.basename(linkerscript_path)
           linkerscript = os.path.join(python_lib, 'config',
                                       linkerscript_name)

           # XXX this isn't the right place to do this: adding the Python
           # library to the link, if needed, should be in the "build_ext"
           # command.  (It's also needed for non-MS compilers on Windows, and
           # it's taken care of for them by the 'build_ext.get_libraries()'
           # method.)
           g['LDSHARED'] = ("%s -L%s/lib -lpython%s" %
                            (linkerscript, PREFIX, sys.version[0:3]))

   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['EXE'] = ".exe"

   global _config_vars
   _config_vars = g


def _init_mac():
   """Initialize the module as appropriate for Macintosh systems"""
   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)

   import MacOS
   if not hasattr(MacOS, 'runtimemodel'):
       g['SO'] = '.ppc.slb'
   else:
       g['SO'] = '.%s.slb' % MacOS.runtimemodel

   # XXX are these used anywhere?
   g['install_lib'] = os.path.join(EXEC_PREFIX, "Lib")
   g['install_platlib'] = os.path.join(EXEC_PREFIX, "Mac", "Lib")

   # These are used by the extension module build
   g['srcdir'] = ':'
   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['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 and Mac OS 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

   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)