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674 lines
27 KiB
Python
674 lines
27 KiB
Python
"""distutils.command.build_ext
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Implements the Distutils 'build_ext' command, for building extension
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modules (currently limited to C extensions, should accommodate C++
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extensions ASAP)."""
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# This module should be kept compatible with Python 1.5.2.
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__revision__ = "$Id$"
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import sys, os, string, re
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from types import *
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from distutils.core import Command
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from distutils.errors import *
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from distutils.sysconfig import customize_compiler, get_python_version
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from distutils.dep_util import newer_group
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from distutils.extension import Extension
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from distutils import log
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# An extension name is just a dot-separated list of Python NAMEs (ie.
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# the same as a fully-qualified module name).
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extension_name_re = re.compile \
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(r'^[a-zA-Z_][a-zA-Z_0-9]*(\.[a-zA-Z_][a-zA-Z_0-9]*)*$')
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def show_compilers ():
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from distutils.ccompiler import show_compilers
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show_compilers()
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class build_ext (Command):
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description = "build C/C++ extensions (compile/link to build directory)"
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# XXX thoughts on how to deal with complex command-line options like
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# these, i.e. how to make it so fancy_getopt can suck them off the
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# command line and make it look like setup.py defined the appropriate
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# lists of tuples of what-have-you.
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# - each command needs a callback to process its command-line options
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# - Command.__init__() needs access to its share of the whole
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# command line (must ultimately come from
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# Distribution.parse_command_line())
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# - it then calls the current command class' option-parsing
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# callback to deal with weird options like -D, which have to
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# parse the option text and churn out some custom data
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# structure
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# - that data structure (in this case, a list of 2-tuples)
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# will then be present in the command object by the time
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# we get to finalize_options() (i.e. the constructor
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# takes care of both command-line and client options
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# in between initialize_options() and finalize_options())
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sep_by = " (separated by '%s')" % os.pathsep
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user_options = [
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('build-lib=', 'b',
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"directory for compiled extension modules"),
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('build-temp=', 't',
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"directory for temporary files (build by-products)"),
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('inplace', 'i',
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"ignore build-lib and put compiled extensions into the source " +
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"directory alongside your pure Python modules"),
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('include-dirs=', 'I',
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"list of directories to search for header files" + sep_by),
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('define=', 'D',
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"C preprocessor macros to define"),
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('undef=', 'U',
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"C preprocessor macros to undefine"),
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('libraries=', 'l',
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"external C libraries to link with"),
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('library-dirs=', 'L',
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"directories to search for external C libraries" + sep_by),
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('rpath=', 'R',
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"directories to search for shared C libraries at runtime"),
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('link-objects=', 'O',
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"extra explicit link objects to include in the link"),
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('debug', 'g',
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"compile/link with debugging information"),
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('force', 'f',
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"forcibly build everything (ignore file timestamps)"),
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('compiler=', 'c',
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"specify the compiler type"),
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('swig-cpp', None,
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"make SWIG create C++ files (default is C)"),
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]
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boolean_options = ['inplace', 'debug', 'force', 'swig-cpp']
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help_options = [
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('help-compiler', None,
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"list available compilers", show_compilers),
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]
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def initialize_options (self):
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self.extensions = None
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self.build_lib = None
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self.build_temp = None
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self.inplace = 0
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self.package = None
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self.include_dirs = None
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self.define = None
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self.undef = None
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self.libraries = None
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self.library_dirs = None
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self.rpath = None
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self.link_objects = None
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self.debug = None
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self.force = None
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self.compiler = None
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self.swig_cpp = None
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def finalize_options (self):
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from distutils import sysconfig
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self.set_undefined_options('build',
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('build_lib', 'build_lib'),
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('build_temp', 'build_temp'),
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('compiler', 'compiler'),
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('debug', 'debug'),
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('force', 'force'))
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if self.package is None:
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self.package = self.distribution.ext_package
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self.extensions = self.distribution.ext_modules
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# Make sure Python's include directories (for Python.h, pyconfig.h,
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# etc.) are in the include search path.
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py_include = sysconfig.get_python_inc()
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plat_py_include = sysconfig.get_python_inc(plat_specific=1)
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if self.include_dirs is None:
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self.include_dirs = self.distribution.include_dirs or []
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if type(self.include_dirs) is StringType:
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self.include_dirs = string.split(self.include_dirs, os.pathsep)
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# Put the Python "system" include dir at the end, so that
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# any local include dirs take precedence.
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self.include_dirs.append(py_include)
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if plat_py_include != py_include:
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self.include_dirs.append(plat_py_include)
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if type(self.libraries) is StringType:
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self.libraries = [self.libraries]
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# Life is easier if we're not forever checking for None, so
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# simplify these options to empty lists if unset
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if self.libraries is None:
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self.libraries = []
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if self.library_dirs is None:
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self.library_dirs = []
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elif type(self.library_dirs) is StringType:
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self.library_dirs = string.split(self.library_dirs, os.pathsep)
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if self.rpath is None:
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self.rpath = []
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elif type(self.rpath) is StringType:
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self.rpath = string.split(self.rpath, os.pathsep)
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# for extensions under windows use different directories
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# for Release and Debug builds.
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# also Python's library directory must be appended to library_dirs
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if os.name == 'nt':
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self.library_dirs.append(os.path.join(sys.exec_prefix, 'libs'))
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if self.debug:
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self.build_temp = os.path.join(self.build_temp, "Debug")
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else:
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self.build_temp = os.path.join(self.build_temp, "Release")
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# Append the source distribution include and library directories,
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# this allows distutils on windows to work in the source tree
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self.include_dirs.append(os.path.join(sys.exec_prefix, 'PC'))
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self.library_dirs.append(os.path.join(sys.exec_prefix, 'PCBuild'))
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# OS/2 (EMX) doesn't support Debug vs Release builds, but has the
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# import libraries in its "Config" subdirectory
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if os.name == 'os2':
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self.library_dirs.append(os.path.join(sys.exec_prefix, 'Config'))
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# for extensions under Cygwin and AtheOS Python's library directory must be
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# appended to library_dirs
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if sys.platform[:6] == 'cygwin' or sys.platform[:6] == 'atheos':
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if string.find(sys.executable, sys.exec_prefix) != -1:
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# building third party extensions
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self.library_dirs.append(os.path.join(sys.prefix, "lib",
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"python" + get_python_version(),
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"config"))
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else:
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# building python standard extensions
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self.library_dirs.append('.')
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# The argument parsing will result in self.define being a string, but
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# it has to be a list of 2-tuples. All the preprocessor symbols
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# specified by the 'define' option will be set to '1'. Multiple
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# symbols can be separated with commas.
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if self.define:
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defines = string.split(self.define, ',')
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self.define = map(lambda symbol: (symbol, '1'), defines)
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# The option for macros to undefine is also a string from the
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# option parsing, but has to be a list. Multiple symbols can also
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# be separated with commas here.
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if self.undef:
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self.undef = string.split(self.undef, ',')
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# finalize_options ()
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def run (self):
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from distutils.ccompiler import new_compiler
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# 'self.extensions', as supplied by setup.py, is a list of
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# Extension instances. See the documentation for Extension (in
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# distutils.extension) for details.
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#
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# For backwards compatibility with Distutils 0.8.2 and earlier, we
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# also allow the 'extensions' list to be a list of tuples:
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# (ext_name, build_info)
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# where build_info is a dictionary containing everything that
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# Extension instances do except the name, with a few things being
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# differently named. We convert these 2-tuples to Extension
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# instances as needed.
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if not self.extensions:
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return
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# If we were asked to build any C/C++ libraries, make sure that the
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# directory where we put them is in the library search path for
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# linking extensions.
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if self.distribution.has_c_libraries():
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build_clib = self.get_finalized_command('build_clib')
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self.libraries.extend(build_clib.get_library_names() or [])
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self.library_dirs.append(build_clib.build_clib)
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# Setup the CCompiler object that we'll use to do all the
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# compiling and linking
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self.compiler = new_compiler(compiler=self.compiler,
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verbose=self.verbose,
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dry_run=self.dry_run,
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force=self.force)
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customize_compiler(self.compiler)
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# And make sure that any compile/link-related options (which might
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# come from the command-line or from the setup script) are set in
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# that CCompiler object -- that way, they automatically apply to
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# all compiling and linking done here.
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if self.include_dirs is not None:
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self.compiler.set_include_dirs(self.include_dirs)
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if self.define is not None:
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# 'define' option is a list of (name,value) tuples
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for (name,value) in self.define:
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self.compiler.define_macro(name, value)
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if self.undef is not None:
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for macro in self.undef:
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self.compiler.undefine_macro(macro)
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if self.libraries is not None:
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self.compiler.set_libraries(self.libraries)
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if self.library_dirs is not None:
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self.compiler.set_library_dirs(self.library_dirs)
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if self.rpath is not None:
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self.compiler.set_runtime_library_dirs(self.rpath)
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if self.link_objects is not None:
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self.compiler.set_link_objects(self.link_objects)
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# Now actually compile and link everything.
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self.build_extensions()
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# run ()
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def check_extensions_list (self, extensions):
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"""Ensure that the list of extensions (presumably provided as a
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command option 'extensions') is valid, i.e. it is a list of
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Extension objects. We also support the old-style list of 2-tuples,
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where the tuples are (ext_name, build_info), which are converted to
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Extension instances here.
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Raise DistutilsSetupError if the structure is invalid anywhere;
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just returns otherwise.
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"""
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if type(extensions) is not ListType:
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raise DistutilsSetupError, \
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"'ext_modules' option must be a list of Extension instances"
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for i in range(len(extensions)):
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ext = extensions[i]
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if isinstance(ext, Extension):
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continue # OK! (assume type-checking done
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# by Extension constructor)
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(ext_name, build_info) = ext
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log.warn(("old-style (ext_name, build_info) tuple found in "
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"ext_modules for extension '%s'"
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"-- please convert to Extension instance" % ext_name))
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if type(ext) is not TupleType and len(ext) != 2:
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raise DistutilsSetupError, \
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("each element of 'ext_modules' option must be an "
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"Extension instance or 2-tuple")
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if not (type(ext_name) is StringType and
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extension_name_re.match(ext_name)):
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raise DistutilsSetupError, \
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("first element of each tuple in 'ext_modules' "
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"must be the extension name (a string)")
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if type(build_info) is not DictionaryType:
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raise DistutilsSetupError, \
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("second element of each tuple in 'ext_modules' "
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"must be a dictionary (build info)")
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# OK, the (ext_name, build_info) dict is type-safe: convert it
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# to an Extension instance.
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ext = Extension(ext_name, build_info['sources'])
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# Easy stuff: one-to-one mapping from dict elements to
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# instance attributes.
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for key in ('include_dirs',
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'library_dirs',
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'libraries',
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'extra_objects',
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'extra_compile_args',
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'extra_link_args'):
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val = build_info.get(key)
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if val is not None:
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setattr(ext, key, val)
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# Medium-easy stuff: same syntax/semantics, different names.
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ext.runtime_library_dirs = build_info.get('rpath')
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if build_info.has_key('def_file'):
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log.warn("'def_file' element of build info dict "
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"no longer supported")
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# Non-trivial stuff: 'macros' split into 'define_macros'
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# and 'undef_macros'.
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macros = build_info.get('macros')
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if macros:
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ext.define_macros = []
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ext.undef_macros = []
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for macro in macros:
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if not (type(macro) is TupleType and
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1 <= len(macro) <= 2):
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raise DistutilsSetupError, \
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("'macros' element of build info dict "
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"must be 1- or 2-tuple")
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if len(macro) == 1:
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ext.undef_macros.append(macro[0])
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elif len(macro) == 2:
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ext.define_macros.append(macro)
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extensions[i] = ext
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# for extensions
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# check_extensions_list ()
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def get_source_files (self):
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self.check_extensions_list(self.extensions)
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filenames = []
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# Wouldn't it be neat if we knew the names of header files too...
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for ext in self.extensions:
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filenames.extend(ext.sources)
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return filenames
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def get_outputs (self):
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# Sanity check the 'extensions' list -- can't assume this is being
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# done in the same run as a 'build_extensions()' call (in fact, we
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# can probably assume that it *isn't*!).
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self.check_extensions_list(self.extensions)
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# And build the list of output (built) filenames. Note that this
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# ignores the 'inplace' flag, and assumes everything goes in the
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# "build" tree.
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outputs = []
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for ext in self.extensions:
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fullname = self.get_ext_fullname(ext.name)
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outputs.append(os.path.join(self.build_lib,
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self.get_ext_filename(fullname)))
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return outputs
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# get_outputs ()
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def build_extensions(self):
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# First, sanity-check the 'extensions' list
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self.check_extensions_list(self.extensions)
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for ext in self.extensions:
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self.build_extension(ext)
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def build_extension(self, ext):
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sources = ext.sources
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if sources is None or type(sources) not in (ListType, TupleType):
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raise DistutilsSetupError, \
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("in 'ext_modules' option (extension '%s'), " +
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"'sources' must be present and must be " +
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"a list of source filenames") % ext.name
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sources = list(sources)
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fullname = self.get_ext_fullname(ext.name)
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if self.inplace:
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# ignore build-lib -- put the compiled extension into
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# the source tree along with pure Python modules
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modpath = string.split(fullname, '.')
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package = string.join(modpath[0:-1], '.')
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base = modpath[-1]
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build_py = self.get_finalized_command('build_py')
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package_dir = build_py.get_package_dir(package)
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ext_filename = os.path.join(package_dir,
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self.get_ext_filename(base))
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else:
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ext_filename = os.path.join(self.build_lib,
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self.get_ext_filename(fullname))
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depends = sources + ext.depends
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if not (self.force or newer_group(depends, ext_filename, 'newer')):
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log.debug("skipping '%s' extension (up-to-date)", ext.name)
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return
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else:
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log.info("building '%s' extension", ext.name)
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# First, scan the sources for SWIG definition files (.i), run
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# SWIG on 'em to create .c files, and modify the sources list
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# accordingly.
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sources = self.swig_sources(sources)
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# Next, compile the source code to object files.
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# XXX not honouring 'define_macros' or 'undef_macros' -- the
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# CCompiler API needs to change to accommodate this, and I
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# want to do one thing at a time!
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# Two possible sources for extra compiler arguments:
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# - 'extra_compile_args' in Extension object
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# - CFLAGS environment variable (not particularly
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# elegant, but people seem to expect it and I
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# guess it's useful)
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# The environment variable should take precedence, and
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# any sensible compiler will give precedence to later
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# command line args. Hence we combine them in order:
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extra_args = ext.extra_compile_args or []
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macros = ext.define_macros[:]
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for undef in ext.undef_macros:
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macros.append((undef,))
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objects = self.compiler.compile(sources,
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output_dir=self.build_temp,
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macros=macros,
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include_dirs=ext.include_dirs,
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debug=self.debug,
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extra_postargs=extra_args,
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depends=ext.depends)
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# XXX -- this is a Vile HACK!
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#
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# The setup.py script for Python on Unix needs to be able to
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# get this list so it can perform all the clean up needed to
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# avoid keeping object files around when cleaning out a failed
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# build of an extension module. Since Distutils does not
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# track dependencies, we have to get rid of intermediates to
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# ensure all the intermediates will be properly re-built.
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#
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self._built_objects = objects[:]
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# Now link the object files together into a "shared object" --
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# of course, first we have to figure out all the other things
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# that go into the mix.
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if ext.extra_objects:
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objects.extend(ext.extra_objects)
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extra_args = ext.extra_link_args or []
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# Detect target language, if not provided
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language = ext.language or self.compiler.detect_language(sources)
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self.compiler.link_shared_object(
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objects, ext_filename,
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libraries=self.get_libraries(ext),
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library_dirs=ext.library_dirs,
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runtime_library_dirs=ext.runtime_library_dirs,
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extra_postargs=extra_args,
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export_symbols=self.get_export_symbols(ext),
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debug=self.debug,
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build_temp=self.build_temp,
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target_lang=language)
|
|
|
|
|
|
def swig_sources (self, sources):
|
|
|
|
"""Walk the list of source files in 'sources', looking for SWIG
|
|
interface (.i) files. Run SWIG on all that are found, and
|
|
return a modified 'sources' list with SWIG source files replaced
|
|
by the generated C (or C++) files.
|
|
"""
|
|
|
|
new_sources = []
|
|
swig_sources = []
|
|
swig_targets = {}
|
|
|
|
# XXX this drops generated C/C++ files into the source tree, which
|
|
# is fine for developers who want to distribute the generated
|
|
# source -- but there should be an option to put SWIG output in
|
|
# the temp dir.
|
|
|
|
if self.swig_cpp:
|
|
target_ext = '.cpp'
|
|
else:
|
|
target_ext = '.c'
|
|
|
|
for source in sources:
|
|
(base, ext) = os.path.splitext(source)
|
|
if ext == ".i": # SWIG interface file
|
|
new_sources.append(base + '_wrap' + target_ext)
|
|
swig_sources.append(source)
|
|
swig_targets[source] = new_sources[-1]
|
|
else:
|
|
new_sources.append(source)
|
|
|
|
if not swig_sources:
|
|
return new_sources
|
|
|
|
swig = self.find_swig()
|
|
swig_cmd = [swig, "-python"]
|
|
if self.swig_cpp:
|
|
swig_cmd.append("-c++")
|
|
|
|
for source in swig_sources:
|
|
target = swig_targets[source]
|
|
log.info("swigging %s to %s", source, target)
|
|
self.spawn(swig_cmd + ["-o", target, source])
|
|
|
|
return new_sources
|
|
|
|
# swig_sources ()
|
|
|
|
def find_swig (self):
|
|
"""Return the name of the SWIG executable. On Unix, this is
|
|
just "swig" -- it should be in the PATH. Tries a bit harder on
|
|
Windows.
|
|
"""
|
|
|
|
if os.name == "posix":
|
|
return "swig"
|
|
elif os.name == "nt":
|
|
|
|
# Look for SWIG in its standard installation directory on
|
|
# Windows (or so I presume!). If we find it there, great;
|
|
# if not, act like Unix and assume it's in the PATH.
|
|
for vers in ("1.3", "1.2", "1.1"):
|
|
fn = os.path.join("c:\\swig%s" % vers, "swig.exe")
|
|
if os.path.isfile(fn):
|
|
return fn
|
|
else:
|
|
return "swig.exe"
|
|
|
|
elif os.name == "os2":
|
|
# assume swig available in the PATH.
|
|
return "swig.exe"
|
|
|
|
else:
|
|
raise DistutilsPlatformError, \
|
|
("I don't know how to find (much less run) SWIG "
|
|
"on platform '%s'") % os.name
|
|
|
|
# find_swig ()
|
|
|
|
# -- Name generators -----------------------------------------------
|
|
# (extension names, filenames, whatever)
|
|
|
|
def get_ext_fullname (self, ext_name):
|
|
if self.package is None:
|
|
return ext_name
|
|
else:
|
|
return self.package + '.' + ext_name
|
|
|
|
def get_ext_filename (self, ext_name):
|
|
r"""Convert the name of an extension (eg. "foo.bar") into the name
|
|
of the file from which it will be loaded (eg. "foo/bar.so", or
|
|
"foo\bar.pyd").
|
|
"""
|
|
|
|
from distutils.sysconfig import get_config_var
|
|
ext_path = string.split(ext_name, '.')
|
|
# OS/2 has an 8 character module (extension) limit :-(
|
|
if os.name == "os2":
|
|
ext_path[len(ext_path) - 1] = ext_path[len(ext_path) - 1][:8]
|
|
# extensions in debug_mode are named 'module_d.pyd' under windows
|
|
so_ext = get_config_var('SO')
|
|
if os.name == 'nt' and self.debug:
|
|
return apply(os.path.join, ext_path) + '_d' + so_ext
|
|
return apply(os.path.join, ext_path) + so_ext
|
|
|
|
def get_export_symbols (self, ext):
|
|
"""Return the list of symbols that a shared extension has to
|
|
export. This either uses 'ext.export_symbols' or, if it's not
|
|
provided, "init" + module_name. Only relevant on Windows, where
|
|
the .pyd file (DLL) must export the module "init" function.
|
|
"""
|
|
|
|
initfunc_name = "init" + string.split(ext.name,'.')[-1]
|
|
if initfunc_name not in ext.export_symbols:
|
|
ext.export_symbols.append(initfunc_name)
|
|
return ext.export_symbols
|
|
|
|
def get_libraries (self, ext):
|
|
"""Return the list of libraries to link against when building a
|
|
shared extension. On most platforms, this is just 'ext.libraries';
|
|
on Windows and OS/2, we add the Python library (eg. python20.dll).
|
|
"""
|
|
# The python library is always needed on Windows. For MSVC, this
|
|
# is redundant, since the library is mentioned in a pragma in
|
|
# pyconfig.h that MSVC groks. The other Windows compilers all seem
|
|
# to need it mentioned explicitly, though, so that's what we do.
|
|
# Append '_d' to the python import library on debug builds.
|
|
if sys.platform == "win32":
|
|
from distutils.msvccompiler import MSVCCompiler
|
|
if not isinstance(self.compiler, MSVCCompiler):
|
|
template = "python%d%d"
|
|
if self.debug:
|
|
template = template + '_d'
|
|
pythonlib = (template %
|
|
(sys.hexversion >> 24, (sys.hexversion >> 16) & 0xff))
|
|
# don't extend ext.libraries, it may be shared with other
|
|
# extensions, it is a reference to the original list
|
|
return ext.libraries + [pythonlib]
|
|
else:
|
|
return ext.libraries
|
|
elif sys.platform == "os2emx":
|
|
# EMX/GCC requires the python library explicitly, and I
|
|
# believe VACPP does as well (though not confirmed) - AIM Apr01
|
|
template = "python%d%d"
|
|
# debug versions of the main DLL aren't supported, at least
|
|
# not at this time - AIM Apr01
|
|
#if self.debug:
|
|
# template = template + '_d'
|
|
pythonlib = (template %
|
|
(sys.hexversion >> 24, (sys.hexversion >> 16) & 0xff))
|
|
# don't extend ext.libraries, it may be shared with other
|
|
# extensions, it is a reference to the original list
|
|
return ext.libraries + [pythonlib]
|
|
elif sys.platform[:6] == "cygwin":
|
|
template = "python%d.%d"
|
|
pythonlib = (template %
|
|
(sys.hexversion >> 24, (sys.hexversion >> 16) & 0xff))
|
|
# don't extend ext.libraries, it may be shared with other
|
|
# extensions, it is a reference to the original list
|
|
return ext.libraries + [pythonlib]
|
|
elif sys.platform[:6] == "atheos":
|
|
from distutils import sysconfig
|
|
|
|
template = "python%d.%d"
|
|
pythonlib = (template %
|
|
(sys.hexversion >> 24, (sys.hexversion >> 16) & 0xff))
|
|
# Get SHLIBS from Makefile
|
|
extra = []
|
|
for lib in sysconfig.get_config_var('SHLIBS').split():
|
|
if lib.startswith('-l'):
|
|
extra.append(lib[2:])
|
|
else:
|
|
extra.append(lib)
|
|
# don't extend ext.libraries, it may be shared with other
|
|
# extensions, it is a reference to the original list
|
|
return ext.libraries + [pythonlib, "m"] + extra
|
|
else:
|
|
return ext.libraries
|
|
|
|
# class build_ext
|