"""Provide access to Python's configuration information. This is actually PyPy's minimal 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. """ __revision__ = "$Id: sysconfig.py 85358 2010-10-10 09:54:59Z antoine.pitrou $" import sys import os import imp from distutils.errors import DistutilsPlatformError PREFIX = os.path.normpath(sys.prefix) EXEC_PREFIX = os.path.normpath(sys.exec_prefix) project_base = os.path.dirname(os.path.abspath(sys.executable)) python_build = False def get_python_inc(plat_specific=0, prefix=None): from os.path import join as j return j(sys.prefix, 'include') 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_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'. """ is_default_prefix = not prefix or os.path.normpath(prefix).startswith(('/usr/lib/pypy')) if prefix is None: prefix = PREFIX if standard_lib: return os.path.join(prefix, "lib-python", get_python_version()) if is_default_prefix and 'PYTHONUSERBASE' not in os.environ and 'real_prefix' not in sys.__dict__: return os.path.join(prefix, 'dist-packages') else: return os.path.join(prefix, 'site-packages') _config_vars = None def _init_posix(): """Initialize the module as appropriate for POSIX systems.""" g = {} g['CC'] = "cc -pthread" g['CXX'] = "c++ -pthread" g['OPT'] = "-DNDEBUG -O2" g['CFLAGS'] = "-DNDEBUG -O2" g['CCSHARED'] = "-fPIC" g['LDSHARED'] = "cc -pthread -shared" g['SO'] = [s[0] for s in imp.get_suffixes() if s[2] == imp.C_EXTENSION][0] g['AR'] = "ar" g['ARFLAGS'] = "rc" g['EXE'] = "" g['LIBDIR'] = os.path.join(sys.prefix, 'lib') g['VERSION'] = get_python_version() if sys.platform[:6] == "darwin": import platform if platform.machine() == 'i386': if platform.architecture()[0] == '32bit': arch = 'i386' else: arch = 'x86_64' else: # just a guess arch = platform.machine() g['LDSHARED'] += ' -undefined dynamic_lookup' g['CC'] += ' -arch %s' % (arch,) global _config_vars _config_vars = g def _init_nt(): """Initialize the module as appropriate for NT""" g = {} g['EXE'] = ".exe" g['SO'] = [s[0] for s in imp.get_suffixes() if s[2] == imp.C_EXTENSION][0] 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 = {} _config_vars['prefix'] = PREFIX _config_vars['exec_prefix'] = EXEC_PREFIX # 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) 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 (CPython) or hard-coded in _init_posix() (PyPy). """ 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 # Use get_config_var() to ensure _config_vars is initialized. if not get_config_var('CUSTOMIZED_OSX_COMPILER'): import _osx_support _osx_support.customize_compiler(_config_vars) _config_vars['CUSTOMIZED_OSX_COMPILER'] = 'True' (cc, cxx, opt, cflags, ccshared, ldshared, so_ext, ar, ar_flags) = \ get_config_vars('CC', 'CXX', 'OPT', 'CFLAGS', 'CCSHARED', 'LDSHARED', 'SO', '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 = so_ext def get_config_h_filename(): """Returns the path of pyconfig.h.""" inc_dir = get_python_inc(plat_specific=1) return os.path.join(inc_dir, 'pyconfig.h') from sysconfig_cpython import ( parse_makefile, _variable_rx, expand_makefile_vars)