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"""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> """ import _imp import os import re import sys import warnings import fnmatch from functools import partial from .errors import DistutilsPlatformError from sysconfig import ( _PREFIX as PREFIX, _BASE_PREFIX as BASE_PREFIX, _EXEC_PREFIX as EXEC_PREFIX, _BASE_EXEC_PREFIX as BASE_EXEC_PREFIX, _PROJECT_BASE as project_base, _PYTHON_BUILD as python_build, _init_posix as sysconfig_init_posix, parse_config_h as sysconfig_parse_config_h, _init_non_posix, _variable_rx, _findvar1_rx, _findvar2_rx, expand_makefile_vars, is_python_build, get_config_h_filename, get_config_var, get_config_vars, get_makefile_filename, get_python_version, ) # This is better than # from sysconfig import _CONFIG_VARS as _config_vars # because it makes sure that the global dictionary is initialized # which might not be true in the time of import. _config_vars = get_config_vars() warnings.warn( 'The distutils.sysconfig module is deprecated, use sysconfig instead', DeprecationWarning, stacklevel=2 ) # Following functions are the same as in sysconfig but with different API def parse_config_h(fp, g=None): return sysconfig_parse_config_h(fp, vars=g) _python_build = partial(is_python_build, check_home=True) _init_posix = partial(sysconfig_init_posix, _config_vars) _init_nt = partial(_init_non_posix, _config_vars) # Similar function is also implemented in sysconfig as _parse_makefile # but without the parsing capabilities of distutils.text_file.TextFile. 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 = re.match(_variable_rx, 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('$$', '$') else: done[n] = v # Variables with a 'PY_' prefix in the makefile. These need to # be made available without that prefix through sysconfig. # Special care is needed to ensure that variable expansion works, even # if the expansion uses the name without a prefix. renamed_variables = ('CFLAGS', 'LDFLAGS', 'CPPFLAGS') # do variable interpolation here while notdone: for name in list(notdone): value = notdone[name] m = re.search(_findvar1_rx, value) or re.search(_findvar2_rx, value) if m: n = m.group(1) found = True if n in done: item = str(done[n]) elif n in notdone: # get it on a subsequent round found = False elif n in os.environ: # do it like make: fall back to environment item = os.environ[n] elif n in renamed_variables: if name.startswith('PY_') and name[3:] in renamed_variables: item = "" elif 'PY_' + n in notdone: found = False else: item = str(done['PY_' + n]) else: done[n] = item = "" if found: after = value[m.end():] value = value[:m.start()] + item + after if "$" 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 # Following functions are deprecated together with this module and they # have no direct replacement # 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 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. 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, cflags, ccshared, ldshared, shlib_suffix, ar, ar_flags, configure_cppflags, configure_cflags, configure_ldflags) = \ get_config_vars('CC', 'CXX', 'CFLAGS', 'CCSHARED', 'LDSHARED', 'SHLIB_SUFFIX', 'AR', 'ARFLAGS', 'CONFIGURE_CPPFLAGS', 'CONFIGURE_CFLAGS', 'CONFIGURE_LDFLAGS') 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 fnmatch.filter([cc, cxx], '*-4.[0-8]'): configure_cflags = configure_cflags.replace('-fstack-protector-strong', '-fstack-protector') ldshared = ldshared.replace('-fstack-protector-strong', '-fstack-protector') cflags = cflags.replace('-fstack-protector-strong', '-fstack-protector') 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'] elif configure_ldflags: ldshared = ldshared + ' ' + configure_ldflags if 'CFLAGS' in os.environ: cflags = cflags + ' ' + os.environ['CFLAGS'] ldshared = ldshared + ' ' + os.environ['CFLAGS'] elif configure_cflags: cflags = cflags + ' ' + configure_cflags ldshared = ldshared + ' ' + configure_cflags if 'CPPFLAGS' in os.environ: cpp = cpp + ' ' + os.environ['CPPFLAGS'] cflags = cflags + ' ' + os.environ['CPPFLAGS'] ldshared = ldshared + ' ' + os.environ['CPPFLAGS'] elif configure_cppflags: cpp = cpp + ' ' + configure_cppflags cflags = cflags + ' ' + configure_cppflags ldshared = ldshared + ' ' + configure_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 is_virtual_environment(): return sys.base_prefix != sys.prefix or hasattr(sys, "real_prefix") 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. if plat_specific: return project_base else: incdir = os.path.join(get_config_var('srcdir'), 'Include') return os.path.normpath(incdir) python_dir = 'python' + get_python_version() + build_flags if not python_build and plat_specific: import sysconfig return sysconfig.get_path('platinclude') return os.path.join(prefix, "include", python_dir) elif os.name == "nt": if python_build: # Include both the include and PC dir to ensure we can find # pyconfig.h return (os.path.join(prefix, "include") + os.path.pathsep + os.path.join(prefix, "PC")) 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'. """ is_default_prefix = not prefix or os.path.normpath(prefix) in ('/usr', '/usr/local') 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": if plat_specific or standard_lib: # Platform-specific modules (any module from a non-pure-Python # module distribution) or standard Python library modules. libdir = sys.platlibdir else: # Pure Python libdir = "lib" libpython = os.path.join(prefix, libdir, "python" + get_python_version()) if standard_lib: return libpython elif is_default_prefix and not is_virtual_environment(): return os.path.join(prefix, "lib", "python3", "dist-packages") else: return os.path.join(libpython, "site-packages") elif os.name == "nt": 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)