AppPkg/Applications/Python/Python-2.7.2/Lib/distutils/command/build_ext.py

   1 """distutils.command.build_ext
   2
   3 Implements the Distutils 'build_ext' command, for building extension
   4 modules (currently limited to C extensions, should accommodate C++
   5 extensions ASAP)."""
   6
   7 # This module should be kept compatible with Python 2.1.
   8
   9 __revision__ = "$Id$"
  10
  11 import sys, os, string, re
  12 from types import *
  13 from site import USER_BASE, USER_SITE
  14 from distutils.core import Command
  15 from distutils.errors import *
  16 from distutils.sysconfig import customize_compiler, get_python_version
  17 from distutils.dep_util import newer_group
  18 from distutils.extension import Extension
  19 from distutils.util import get_platform
  20 from distutils import log
  21
  22 if os.name == 'nt':
  23     from distutils.msvccompiler import get_build_version
  24     MSVC_VERSION = int(get_build_version())
  25
  26 # An extension name is just a dot-separated list of Python NAMEs (ie.
  27 # the same as a fully-qualified module name).
  28 extension_name_re = re.compile \
  29     (r'^[a-zA-Z_][a-zA-Z_0-9]*(\.[a-zA-Z_][a-zA-Z_0-9]*)*$')
  30
  31
  32 def show_compilers ():
  33     from distutils.ccompiler import show_compilers
  34     show_compilers()
  35
  36
  37 class build_ext (Command):
  38
  39     description = "build C/C++ extensions (compile/link to build directory)"
  40
  41     # XXX thoughts on how to deal with complex command-line options like
  42     # these, i.e. how to make it so fancy_getopt can suck them off the
  43     # command line and make it look like setup.py defined the appropriate
  44     # lists of tuples of what-have-you.
  45     #   - each command needs a callback to process its command-line options
  46     #   - Command.__init__() needs access to its share of the whole
  47     #     command line (must ultimately come from
  48     #     Distribution.parse_command_line())
  49     #   - it then calls the current command class' option-parsing
  50     #     callback to deal with weird options like -D, which have to
  51     #     parse the option text and churn out some custom data
  52     #     structure
  53     #   - that data structure (in this case, a list of 2-tuples)
  54     #     will then be present in the command object by the time
  55     #     we get to finalize_options() (i.e. the constructor
  56     #     takes care of both command-line and client options
  57     #     in between initialize_options() and finalize_options())
  58
  59     sep_by = " (separated by '%s')" % os.pathsep
  60     user_options = [
  61         ('build-lib=', 'b',
  62          "directory for compiled extension modules"),
  63         ('build-temp=', 't',
  64          "directory for temporary files (build by-products)"),
  65         ('plat-name=', 'p',
  66          "platform name to cross-compile for, if supported "
  67          "(default: %s)" % get_platform()),
  68         ('inplace', 'i',
  69          "ignore build-lib and put compiled extensions into the source " +
  70          "directory alongside your pure Python modules"),
  71         ('include-dirs=', 'I',
  72          "list of directories to search for header files" + sep_by),
  73         ('define=', 'D',
  74          "C preprocessor macros to define"),
  75         ('undef=', 'U',
  76          "C preprocessor macros to undefine"),
  77         ('libraries=', 'l',
  78          "external C libraries to link with"),
  79         ('library-dirs=', 'L',
  80          "directories to search for external C libraries" + sep_by),
  81         ('rpath=', 'R',
  82          "directories to search for shared C libraries at runtime"),
  83         ('link-objects=', 'O',
  84          "extra explicit link objects to include in the link"),
  85         ('debug', 'g',
  86          "compile/link with debugging information"),
  87         ('force', 'f',
  88          "forcibly build everything (ignore file timestamps)"),
  89         ('compiler=', 'c',
  90          "specify the compiler type"),
  91         ('swig-cpp', None,
  92          "make SWIG create C++ files (default is C)"),
  93         ('swig-opts=', None,
  94          "list of SWIG command line options"),
  95         ('swig=', None,
  96          "path to the SWIG executable"),
  97         ('user', None,
  98          "add user include, library and rpath"),
  99         ]
 100
 101     boolean_options = ['inplace', 'debug', 'force', 'swig-cpp', 'user']
 102
 103     help_options = [
 104         ('help-compiler', None,
 105          "list available compilers", show_compilers),
 106         ]
 107
 108     def initialize_options (self):
 109         self.extensions = None
 110         self.build_lib = None
 111         self.plat_name = None
 112         self.build_temp = None
 113         self.inplace = 0
 114         self.package = None
 115
 116         self.include_dirs = None
 117         self.define = None
 118         self.undef = None
 119         self.libraries = None
 120         self.library_dirs = None
 121         self.rpath = None
 122         self.link_objects = None
 123         self.debug = None
 124         self.force = None
 125         self.compiler = None
 126         self.swig = None
 127         self.swig_cpp = None
 128         self.swig_opts = None
 129         self.user = None
 130
 131     def finalize_options(self):
 132         from distutils import sysconfig
 133
 134         self.set_undefined_options('build',
 135                                    ('build_lib', 'build_lib'),
 136                                    ('build_temp', 'build_temp'),
 137                                    ('compiler', 'compiler'),
 138                                    ('debug', 'debug'),
 139                                    ('force', 'force'),
 140                                    ('plat_name', 'plat_name'),
 141                                    )
 142
 143         if self.package is None:
 144             self.package = self.distribution.ext_package
 145
 146         self.extensions = self.distribution.ext_modules
 147
 148         # Make sure Python's include directories (for Python.h, pyconfig.h,
 149         # etc.) are in the include search path.
 150         py_include = sysconfig.get_python_inc()
 151         plat_py_include = sysconfig.get_python_inc(plat_specific=1)
 152         if self.include_dirs is None:
 153             self.include_dirs = self.distribution.include_dirs or []
 154         if isinstance(self.include_dirs, str):
 155             self.include_dirs = self.include_dirs.split(os.pathsep)
 156
 157         # Put the Python "system" include dir at the end, so that
 158         # any local include dirs take precedence.
 159         self.include_dirs.append(py_include)
 160         if plat_py_include != py_include:
 161             self.include_dirs.append(plat_py_include)
 162
 163         if isinstance(self.libraries, str):
 164             self.libraries = [self.libraries]
 165
 166         # Life is easier if we're not forever checking for None, so
 167         # simplify these options to empty lists if unset
 168         if self.libraries is None:
 169             self.libraries = []
 170         if self.library_dirs is None:
 171             self.library_dirs = []
 172         elif type(self.library_dirs) is StringType:
 173             self.library_dirs = string.split(self.library_dirs, os.pathsep)
 174
 175         if self.rpath is None:
 176             self.rpath = []
 177         elif type(self.rpath) is StringType:
 178             self.rpath = string.split(self.rpath, os.pathsep)
 179
 180         # for extensions under windows use different directories
 181         # for Release and Debug builds.
 182         # also Python's library directory must be appended to library_dirs
 183         if os.name == 'nt':
 184             # the 'libs' directory is for binary installs - we assume that
 185             # must be the *native* platform.  But we don't really support
 186             # cross-compiling via a binary install anyway, so we let it go.
 187             self.library_dirs.append(os.path.join(sys.exec_prefix, 'libs'))
 188             if self.debug:
 189                 self.build_temp = os.path.join(self.build_temp, "Debug")
 190             else:
 191                 self.build_temp = os.path.join(self.build_temp, "Release")
 192
 193             # Append the source distribution include and library directories,
 194             # this allows distutils on windows to work in the source tree
 195             self.include_dirs.append(os.path.join(sys.exec_prefix, 'PC'))
 196             if MSVC_VERSION == 9:
 197                 # Use the .lib files for the correct architecture
 198                 if self.plat_name == 'win32':
 199                     suffix = ''
 200                 else:
 201                     # win-amd64 or win-ia64
 202                     suffix = self.plat_name[4:]
 203                 new_lib = os.path.join(sys.exec_prefix, 'PCbuild')
 204                 if suffix:
 205                     new_lib = os.path.join(new_lib, suffix)
 206                 self.library_dirs.append(new_lib)
 207
 208             elif MSVC_VERSION == 8:
 209                 self.library_dirs.append(os.path.join(sys.exec_prefix,
 210                                          'PC', 'VS8.0'))
 211             elif MSVC_VERSION == 7:
 212                 self.library_dirs.append(os.path.join(sys.exec_prefix,
 213                                          'PC', 'VS7.1'))
 214             else:
 215                 self.library_dirs.append(os.path.join(sys.exec_prefix,
 216                                          'PC', 'VC6'))
 217
 218         # OS/2 (EMX) doesn't support Debug vs Release builds, but has the
 219         # import libraries in its "Config" subdirectory
 220         if os.name == 'os2':
 221             self.library_dirs.append(os.path.join(sys.exec_prefix, 'Config'))
 222
 223         # for extensions under Cygwin and AtheOS Python's library directory must be
 224         # appended to library_dirs
 225         if sys.platform[:6] == 'cygwin' or sys.platform[:6] == 'atheos':
 226             if sys.executable.startswith(os.path.join(sys.exec_prefix, "bin")):
 227                 # building third party extensions
 228                 self.library_dirs.append(os.path.join(sys.prefix, "lib",
 229                                                       "python" + get_python_version(),
 230                                                       "config"))
 231             else:
 232                 # building python standard extensions
 233                 self.library_dirs.append('.')
 234
 235         # for extensions under Linux or Solaris with a shared Python library,
 236         # Python's library directory must be appended to library_dirs
 237         sysconfig.get_config_var('Py_ENABLE_SHARED')
 238         if ((sys.platform.startswith('linux') or sys.platform.startswith('gnu')
 239              or sys.platform.startswith('sunos'))
 240             and sysconfig.get_config_var('Py_ENABLE_SHARED')):
 241             if sys.executable.startswith(os.path.join(sys.exec_prefix, "bin")):
 242                 # building third party extensions
 243                 self.library_dirs.append(sysconfig.get_config_var('LIBDIR'))
 244             else:
 245                 # building python standard extensions
 246                 self.library_dirs.append('.')
 247
 248         # The argument parsing will result in self.define being a string, but
 249         # it has to be a list of 2-tuples.  All the preprocessor symbols
 250         # specified by the 'define' option will be set to '1'.  Multiple
 251         # symbols can be separated with commas.
 252
 253         if self.define:
 254             defines = self.define.split(',')
 255             self.define = map(lambda symbol: (symbol, '1'), defines)
 256
 257         # The option for macros to undefine is also a string from the
 258         # option parsing, but has to be a list.  Multiple symbols can also
 259         # be separated with commas here.
 260         if self.undef:
 261             self.undef = self.undef.split(',')
 262
 263         if self.swig_opts is None:
 264             self.swig_opts = []
 265         else:
 266             self.swig_opts = self.swig_opts.split(' ')
 267
 268         # Finally add the user include and library directories if requested
 269         if self.user:
 270             user_include = os.path.join(USER_BASE, "include")
 271             user_lib = os.path.join(USER_BASE, "lib")
 272             if os.path.isdir(user_include):
 273                 self.include_dirs.append(user_include)
 274             if os.path.isdir(user_lib):
 275                 self.library_dirs.append(user_lib)
 276                 self.rpath.append(user_lib)
 277
 278     def run(self):
 279         from distutils.ccompiler import new_compiler
 280
 281         # 'self.extensions', as supplied by setup.py, is a list of
 282         # Extension instances.  See the documentation for Extension (in
 283         # distutils.extension) for details.
 284         #
 285         # For backwards compatibility with Distutils 0.8.2 and earlier, we
 286         # also allow the 'extensions' list to be a list of tuples:
 287         #    (ext_name, build_info)
 288         # where build_info is a dictionary containing everything that
 289         # Extension instances do except the name, with a few things being
 290         # differently named.  We convert these 2-tuples to Extension
 291         # instances as needed.
 292
 293         if not self.extensions:
 294             return
 295
 296         # If we were asked to build any C/C++ libraries, make sure that the
 297         # directory where we put them is in the library search path for
 298         # linking extensions.
 299         if self.distribution.has_c_libraries():
 300             build_clib = self.get_finalized_command('build_clib')
 301             self.libraries.extend(build_clib.get_library_names() or [])
 302             self.library_dirs.append(build_clib.build_clib)
 303
 304         # Setup the CCompiler object that we'll use to do all the
 305         # compiling and linking
 306         self.compiler = new_compiler(compiler=self.compiler,
 307                                      verbose=self.verbose,
 308                                      dry_run=self.dry_run,
 309                                      force=self.force)
 310         customize_compiler(self.compiler)
 311         # If we are cross-compiling, init the compiler now (if we are not
 312         # cross-compiling, init would not hurt, but people may rely on
 313         # late initialization of compiler even if they shouldn't...)
 314         if os.name == 'nt' and self.plat_name != get_platform():
 315             self.compiler.initialize(self.plat_name)
 316
 317         # And make sure that any compile/link-related options (which might
 318         # come from the command-line or from the setup script) are set in
 319         # that CCompiler object -- that way, they automatically apply to
 320         # all compiling and linking done here.
 321         if self.include_dirs is not None:
 322             self.compiler.set_include_dirs(self.include_dirs)
 323         if self.define is not None:
 324             # 'define' option is a list of (name,value) tuples
 325             for (name, value) in self.define:
 326                 self.compiler.define_macro(name, value)
 327         if self.undef is not None:
 328             for macro in self.undef:
 329                 self.compiler.undefine_macro(macro)
 330         if self.libraries is not None:
 331             self.compiler.set_libraries(self.libraries)
 332         if self.library_dirs is not None:
 333             self.compiler.set_library_dirs(self.library_dirs)
 334         if self.rpath is not None:
 335             self.compiler.set_runtime_library_dirs(self.rpath)
 336         if self.link_objects is not None:
 337             self.compiler.set_link_objects(self.link_objects)
 338
 339         # Now actually compile and link everything.
 340         self.build_extensions()
 341
 342     def check_extensions_list(self, extensions):
 343         """Ensure that the list of extensions (presumably provided as a
 344         command option 'extensions') is valid, i.e. it is a list of
 345         Extension objects.  We also support the old-style list of 2-tuples,
 346         where the tuples are (ext_name, build_info), which are converted to
 347         Extension instances here.
 348
 349         Raise DistutilsSetupError if the structure is invalid anywhere;
 350         just returns otherwise.
 351         """
 352         if not isinstance(extensions, list):
 353             raise DistutilsSetupError, \
 354                   "'ext_modules' option must be a list of Extension instances"
 355
 356         for i, ext in enumerate(extensions):
 357             if isinstance(ext, Extension):
 358                 continue                # OK! (assume type-checking done
 359                                         # by Extension constructor)
 360
 361             if not isinstance(ext, tuple) or len(ext) != 2:
 362                 raise DistutilsSetupError, \
 363                       ("each element of 'ext_modules' option must be an "
 364                        "Extension instance or 2-tuple")
 365
 366             ext_name, build_info = ext
 367
 368             log.warn(("old-style (ext_name, build_info) tuple found in "
 369                       "ext_modules for extension '%s'"
 370                       "-- please convert to Extension instance" % ext_name))
 371
 372             if not (isinstance(ext_name, str) and
 373                     extension_name_re.match(ext_name)):
 374                 raise DistutilsSetupError, \
 375                       ("first element of each tuple in 'ext_modules' "
 376                        "must be the extension name (a string)")
 377
 378             if not isinstance(build_info, dict):
 379                 raise DistutilsSetupError, \
 380                       ("second element of each tuple in 'ext_modules' "
 381                        "must be a dictionary (build info)")
 382
 383             # OK, the (ext_name, build_info) dict is type-safe: convert it
 384             # to an Extension instance.
 385             ext = Extension(ext_name, build_info['sources'])
 386
 387             # Easy stuff: one-to-one mapping from dict elements to
 388             # instance attributes.
 389             for key in ('include_dirs', 'library_dirs', 'libraries',
 390                         'extra_objects', 'extra_compile_args',
 391                         'extra_link_args'):
 392                 val = build_info.get(key)
 393                 if val is not None:
 394                     setattr(ext, key, val)
 395
 396             # Medium-easy stuff: same syntax/semantics, different names.
 397             ext.runtime_library_dirs = build_info.get('rpath')
 398             if 'def_file' in build_info:
 399                 log.warn("'def_file' element of build info dict "
 400                          "no longer supported")
 401
 402             # Non-trivial stuff: 'macros' split into 'define_macros'
 403             # and 'undef_macros'.
 404             macros = build_info.get('macros')
 405             if macros:
 406                 ext.define_macros = []
 407                 ext.undef_macros = []
 408                 for macro in macros:
 409                     if not (isinstance(macro, tuple) and len(macro) in (1, 2)):
 410                         raise DistutilsSetupError, \
 411                               ("'macros' element of build info dict "
 412                                "must be 1- or 2-tuple")
 413                     if len(macro) == 1:
 414                         ext.undef_macros.append(macro[0])
 415                     elif len(macro) == 2:
 416                         ext.define_macros.append(macro)
 417
 418             extensions[i] = ext
 419
 420     def get_source_files(self):
 421         self.check_extensions_list(self.extensions)
 422         filenames = []
 423
 424         # Wouldn't it be neat if we knew the names of header files too...
 425         for ext in self.extensions:
 426             filenames.extend(ext.sources)
 427
 428         return filenames
 429
 430     def get_outputs(self):
 431         # Sanity check the 'extensions' list -- can't assume this is being
 432         # done in the same run as a 'build_extensions()' call (in fact, we
 433         # can probably assume that it *isn't*!).
 434         self.check_extensions_list(self.extensions)
 435
 436         # And build the list of output (built) filenames.  Note that this
 437         # ignores the 'inplace' flag, and assumes everything goes in the
 438         # "build" tree.
 439         outputs = []
 440         for ext in self.extensions:
 441             outputs.append(self.get_ext_fullpath(ext.name))
 442         return outputs
 443
 444     def build_extensions(self):
 445         # First, sanity-check the 'extensions' list
 446         self.check_extensions_list(self.extensions)
 447
 448         for ext in self.extensions:
 449             self.build_extension(ext)
 450
 451     def build_extension(self, ext):
 452         sources = ext.sources
 453         if sources is None or type(sources) not in (ListType, TupleType):
 454             raise DistutilsSetupError, \
 455                   ("in 'ext_modules' option (extension '%s'), " +
 456                    "'sources' must be present and must be " +
 457                    "a list of source filenames") % ext.name
 458         sources = list(sources)
 459
 460         ext_path = self.get_ext_fullpath(ext.name)
 461         depends = sources + ext.depends
 462         if not (self.force or newer_group(depends, ext_path, 'newer')):
 463             log.debug("skipping '%s' extension (up-to-date)", ext.name)
 464             return
 465         else:
 466             log.info("building '%s' extension", ext.name)
 467
 468         # First, scan the sources for SWIG definition files (.i), run
 469         # SWIG on 'em to create .c files, and modify the sources list
 470         # accordingly.
 471         sources = self.swig_sources(sources, ext)
 472
 473         # Next, compile the source code to object files.
 474
 475         # XXX not honouring 'define_macros' or 'undef_macros' -- the
 476         # CCompiler API needs to change to accommodate this, and I
 477         # want to do one thing at a time!
 478
 479         # Two possible sources for extra compiler arguments:
 480         #   - 'extra_compile_args' in Extension object
 481         #   - CFLAGS environment variable (not particularly
 482         #     elegant, but people seem to expect it and I
 483         #     guess it's useful)
 484         # The environment variable should take precedence, and
 485         # any sensible compiler will give precedence to later
 486         # command line args.  Hence we combine them in order:
 487         extra_args = ext.extra_compile_args or []
 488
 489         macros = ext.define_macros[:]
 490         for undef in ext.undef_macros:
 491             macros.append((undef,))
 492
 493         objects = self.compiler.compile(sources,
 494                                          output_dir=self.build_temp,
 495                                          macros=macros,
 496                                          include_dirs=ext.include_dirs,
 497                                          debug=self.debug,
 498                                          extra_postargs=extra_args,
 499                                          depends=ext.depends)
 500
 501         # XXX -- this is a Vile HACK!
 502         #
 503         # The setup.py script for Python on Unix needs to be able to
 504         # get this list so it can perform all the clean up needed to
 505         # avoid keeping object files around when cleaning out a failed
 506         # build of an extension module.  Since Distutils does not
 507         # track dependencies, we have to get rid of intermediates to
 508         # ensure all the intermediates will be properly re-built.
 509         #
 510         self._built_objects = objects[:]
 511
 512         # Now link the object files together into a "shared object" --
 513         # of course, first we have to figure out all the other things
 514         # that go into the mix.
 515         if ext.extra_objects:
 516             objects.extend(ext.extra_objects)
 517         extra_args = ext.extra_link_args or []
 518
 519         # Detect target language, if not provided
 520         language = ext.language or self.compiler.detect_language(sources)
 521
 522         self.compiler.link_shared_object(
 523             objects, ext_path,
 524             libraries=self.get_libraries(ext),
 525             library_dirs=ext.library_dirs,
 526             runtime_library_dirs=ext.runtime_library_dirs,
 527             extra_postargs=extra_args,
 528             export_symbols=self.get_export_symbols(ext),
 529             debug=self.debug,
 530             build_temp=self.build_temp,
 531             target_lang=language)
 532
 533
 534     def swig_sources (self, sources, extension):
 535
 536         """Walk the list of source files in 'sources', looking for SWIG
 537         interface (.i) files.  Run SWIG on all that are found, and
 538         return a modified 'sources' list with SWIG source files replaced
 539         by the generated C (or C++) files.
 540         """
 541
 542         new_sources = []
 543         swig_sources = []
 544         swig_targets = {}
 545
 546         # XXX this drops generated C/C++ files into the source tree, which
 547         # is fine for developers who want to distribute the generated
 548         # source -- but there should be an option to put SWIG output in
 549         # the temp dir.
 550
 551         if self.swig_cpp:
 552             log.warn("--swig-cpp is deprecated - use --swig-opts=-c++")
 553
 554         if self.swig_cpp or ('-c++' in self.swig_opts) or \
 555            ('-c++' in extension.swig_opts):
 556             target_ext = '.cpp'
 557         else:
 558             target_ext = '.c'
 559
 560         for source in sources:
 561             (base, ext) = os.path.splitext(source)
 562             if ext == ".i":             # SWIG interface file
 563                 new_sources.append(base + '_wrap' + target_ext)
 564                 swig_sources.append(source)
 565                 swig_targets[source] = new_sources[-1]
 566             else:
 567                 new_sources.append(source)
 568
 569         if not swig_sources:
 570             return new_sources
 571
 572         swig = self.swig or self.find_swig()
 573         swig_cmd = [swig, "-python"]
 574         swig_cmd.extend(self.swig_opts)
 575         if self.swig_cpp:
 576             swig_cmd.append("-c++")
 577
 578         # Do not override commandline arguments
 579         if not self.swig_opts:
 580             for o in extension.swig_opts:
 581                 swig_cmd.append(o)
 582
 583         for source in swig_sources:
 584             target = swig_targets[source]
 585             log.info("swigging %s to %s", source, target)
 586             self.spawn(swig_cmd + ["-o", target, source])
 587
 588         return new_sources
 589
 590     # swig_sources ()
 591
 592     def find_swig (self):
 593         """Return the name of the SWIG executable.  On Unix, this is
 594         just "swig" -- it should be in the PATH.  Tries a bit harder on
 595         Windows.
 596         """
 597
 598         if os.name == "posix":
 599             return "swig"
 600         elif os.name == "nt":
 601
 602             # Look for SWIG in its standard installation directory on
 603             # Windows (or so I presume!).  If we find it there, great;
 604             # if not, act like Unix and assume it's in the PATH.
 605             for vers in ("1.3", "1.2", "1.1"):
 606                 fn = os.path.join("c:\\swig%s" % vers, "swig.exe")
 607                 if os.path.isfile(fn):
 608                     return fn
 609             else:
 610                 return "swig.exe"
 611
 612         elif os.name == "os2":
 613             # assume swig available in the PATH.
 614             return "swig.exe"
 615
 616         else:
 617             raise DistutilsPlatformError, \
 618                   ("I don't know how to find (much less run) SWIG "
 619                    "on platform '%s'") % os.name
 620
 621     # find_swig ()
 622
 623     # -- Name generators -----------------------------------------------
 624     # (extension names, filenames, whatever)
 625     def get_ext_fullpath(self, ext_name):
 626         """Returns the path of the filename for a given extension.
 627
 628         The file is located in `build_lib` or directly in the package
 629         (inplace option).
 630         """
 631         # makes sure the extension name is only using dots
 632         all_dots = string.maketrans('/'+os.sep, '..')
 633         ext_name = ext_name.translate(all_dots)
 634
 635         fullname = self.get_ext_fullname(ext_name)
 636         modpath = fullname.split('.')
 637         filename = self.get_ext_filename(ext_name)
 638         filename = os.path.split(filename)[-1]
 639
 640         if not self.inplace:
 641             # no further work needed
 642             # returning :
 643             #   build_dir/package/path/filename
 644             filename = os.path.join(*modpath[:-1]+[filename])
 645             return os.path.join(self.build_lib, filename)
 646
 647         # the inplace option requires to find the package directory
 648         # using the build_py command for that
 649         package = '.'.join(modpath[0:-1])
 650         build_py = self.get_finalized_command('build_py')
 651         package_dir = os.path.abspath(build_py.get_package_dir(package))
 652
 653         # returning
 654         #   package_dir/filename
 655         return os.path.join(package_dir, filename)
 656
 657     def get_ext_fullname(self, ext_name):
 658         """Returns the fullname of a given extension name.
 659
 660         Adds the `package.` prefix"""
 661         if self.package is None:
 662             return ext_name
 663         else:
 664             return self.package + '.' + ext_name
 665
 666     def get_ext_filename(self, ext_name):
 667         r"""Convert the name of an extension (eg. "foo.bar") into the name
 668         of the file from which it will be loaded (eg. "foo/bar.so", or
 669         "foo\bar.pyd").
 670         """
 671         from distutils.sysconfig import get_config_var
 672         ext_path = string.split(ext_name, '.')
 673         # OS/2 has an 8 character module (extension) limit :-(
 674         if os.name == "os2":
 675             ext_path[len(ext_path) - 1] = ext_path[len(ext_path) - 1][:8]
 676         # extensions in debug_mode are named 'module_d.pyd' under windows
 677         so_ext = get_config_var('SO')
 678         if os.name == 'nt' and self.debug:
 679             return os.path.join(*ext_path) + '_d' + so_ext
 680         return os.path.join(*ext_path) + so_ext
 681
 682     def get_export_symbols (self, ext):
 683         """Return the list of symbols that a shared extension has to
 684         export.  This either uses 'ext.export_symbols' or, if it's not
 685         provided, "init" + module_name.  Only relevant on Windows, where
 686         the .pyd file (DLL) must export the module "init" function.
 687         """
 688         initfunc_name = "init" + ext.name.split('.')[-1]
 689         if initfunc_name not in ext.export_symbols:
 690             ext.export_symbols.append(initfunc_name)
 691         return ext.export_symbols
 692
 693     def get_libraries (self, ext):
 694         """Return the list of libraries to link against when building a
 695         shared extension.  On most platforms, this is just 'ext.libraries';
 696         on Windows and OS/2, we add the Python library (eg. python20.dll).
 697         """
 698         # The python library is always needed on Windows.  For MSVC, this
 699         # is redundant, since the library is mentioned in a pragma in
 700         # pyconfig.h that MSVC groks.  The other Windows compilers all seem
 701         # to need it mentioned explicitly, though, so that's what we do.
 702         # Append '_d' to the python import library on debug builds.
 703         if sys.platform == "win32":
 704             from distutils.msvccompiler import MSVCCompiler
 705             if not isinstance(self.compiler, MSVCCompiler):
 706                 template = "python%d%d"
 707                 if self.debug:
 708                     template = template + '_d'
 709                 pythonlib = (template %
 710                        (sys.hexversion >> 24, (sys.hexversion >> 16) & 0xff))
 711                 # don't extend ext.libraries, it may be shared with other
 712                 # extensions, it is a reference to the original list
 713                 return ext.libraries + [pythonlib]
 714             else:
 715                 return ext.libraries
 716         elif sys.platform == "os2emx":
 717             # EMX/GCC requires the python library explicitly, and I
 718             # believe VACPP does as well (though not confirmed) - AIM Apr01
 719             template = "python%d%d"
 720             # debug versions of the main DLL aren't supported, at least
 721             # not at this time - AIM Apr01
 722             #if self.debug:
 723             #    template = template + '_d'
 724             pythonlib = (template %
 725                    (sys.hexversion >> 24, (sys.hexversion >> 16) & 0xff))
 726             # don't extend ext.libraries, it may be shared with other
 727             # extensions, it is a reference to the original list
 728             return ext.libraries + [pythonlib]
 729         elif sys.platform[:6] == "cygwin":
 730             template = "python%d.%d"
 731             pythonlib = (template %
 732                    (sys.hexversion >> 24, (sys.hexversion >> 16) & 0xff))
 733             # don't extend ext.libraries, it may be shared with other
 734             # extensions, it is a reference to the original list
 735             return ext.libraries + [pythonlib]
 736         elif sys.platform[:6] == "atheos":
 737             from distutils import sysconfig
 738
 739             template = "python%d.%d"
 740             pythonlib = (template %
 741                    (sys.hexversion >> 24, (sys.hexversion >> 16) & 0xff))
 742             # Get SHLIBS from Makefile
 743             extra = []
 744             for lib in sysconfig.get_config_var('SHLIBS').split():
 745                 if lib.startswith('-l'):
 746                     extra.append(lib[2:])
 747                 else:
 748                     extra.append(lib)
 749             # don't extend ext.libraries, it may be shared with other
 750             # extensions, it is a reference to the original list
 751             return ext.libraries + [pythonlib, "m"] + extra
 752
 753         elif sys.platform == 'darwin':
 754             # Don't use the default code below
 755             return ext.libraries
 756         elif sys.platform[:3] == 'aix':
 757             # Don't use the default code below
 758             return ext.libraries
 759         else:
 760             from distutils import sysconfig
 761             if sysconfig.get_config_var('Py_ENABLE_SHARED'):
 762                 template = "python%d.%d"
 763                 pythonlib = (template %
 764                              (sys.hexversion >> 24, (sys.hexversion >> 16) & 0xff))
 765                 return ext.libraries + [pythonlib]
 766             else:
 767                 return ext.libraries
 768
 769 # class build_ext