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d7e83a1d51
On cygwin, the setup.py script uses unixccompiler.py for compiling and linking C extensions. The unixccompiler.py script assumes that executables do not get special extensions, which makes sense for Unix. However, on Cygwin, executables get an .exe extension. This causes a problem during the configuration step (python setup.py config), in which some temporary executables may be generated. As unixccompiler.py does not know about the .exe extension, distutils fails to clean up after itself: it does not remove _configtest.exe but tries to remove _configtest instead. The attached patch to unixccompiler.py sets the correct exe_extension for cygwin by checking if sys.platform is 'cygwin'. With this patch, distutils cleans up after itself correctly. Michiel de Hoon University of Tokyo, Human Genome Center.
236 lines
10 KiB
Python
236 lines
10 KiB
Python
"""distutils.unixccompiler
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Contains the UnixCCompiler class, a subclass of CCompiler that handles
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the "typical" Unix-style command-line C compiler:
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* macros defined with -Dname[=value]
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* macros undefined with -Uname
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* include search directories specified with -Idir
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* libraries specified with -lllib
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* library search directories specified with -Ldir
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* compile handled by 'cc' (or similar) executable with -c option:
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compiles .c to .o
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* link static library handled by 'ar' command (possibly with 'ranlib')
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* link shared library handled by 'cc -shared'
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"""
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__revision__ = "$Id$"
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import os, sys
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from types import StringType, NoneType
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from copy import copy
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from distutils import sysconfig
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from distutils.dep_util import newer
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from distutils.ccompiler import \
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CCompiler, gen_preprocess_options, gen_lib_options
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from distutils.errors import \
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DistutilsExecError, CompileError, LibError, LinkError
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from distutils import log
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# XXX Things not currently handled:
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# * optimization/debug/warning flags; we just use whatever's in Python's
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# Makefile and live with it. Is this adequate? If not, we might
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# have to have a bunch of subclasses GNUCCompiler, SGICCompiler,
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# SunCCompiler, and I suspect down that road lies madness.
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# * even if we don't know a warning flag from an optimization flag,
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# we need some way for outsiders to feed preprocessor/compiler/linker
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# flags in to us -- eg. a sysadmin might want to mandate certain flags
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# via a site config file, or a user might want to set something for
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# compiling this module distribution only via the setup.py command
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# line, whatever. As long as these options come from something on the
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# current system, they can be as system-dependent as they like, and we
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# should just happily stuff them into the preprocessor/compiler/linker
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# options and carry on.
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class UnixCCompiler(CCompiler):
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compiler_type = 'unix'
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# These are used by CCompiler in two places: the constructor sets
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# instance attributes 'preprocessor', 'compiler', etc. from them, and
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# 'set_executable()' allows any of these to be set. The defaults here
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# are pretty generic; they will probably have to be set by an outsider
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# (eg. using information discovered by the sysconfig about building
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# Python extensions).
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executables = {'preprocessor' : None,
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'compiler' : ["cc"],
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'compiler_so' : ["cc"],
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'compiler_cxx' : ["cc"],
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'linker_so' : ["cc", "-shared"],
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'linker_exe' : ["cc"],
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'archiver' : ["ar", "-cr"],
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'ranlib' : None,
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}
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if sys.platform[:6] == "darwin":
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executables['ranlib'] = ["ranlib"]
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# Needed for the filename generation methods provided by the base
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# class, CCompiler. NB. whoever instantiates/uses a particular
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# UnixCCompiler instance should set 'shared_lib_ext' -- we set a
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# reasonable common default here, but it's not necessarily used on all
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# Unices!
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src_extensions = [".c",".C",".cc",".cxx",".cpp",".m"]
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obj_extension = ".o"
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static_lib_extension = ".a"
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shared_lib_extension = ".so"
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dylib_lib_extension = ".dylib"
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static_lib_format = shared_lib_format = dylib_lib_format = "lib%s%s"
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if sys.platform == "cygwin":
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exe_extension = ".exe"
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def preprocess(self, source,
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output_file=None, macros=None, include_dirs=None,
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extra_preargs=None, extra_postargs=None):
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ignore, macros, include_dirs = \
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self._fix_compile_args(None, macros, include_dirs)
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pp_opts = gen_preprocess_options(macros, include_dirs)
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pp_args = self.preprocessor + pp_opts
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if output_file:
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pp_args.extend(['-o', output_file])
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if extra_preargs:
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pp_args[:0] = extra_preargs
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if extra_postargs:
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pp_args.extend(extra_postargs)
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pp_args.append(source)
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# We need to preprocess: either we're being forced to, or we're
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# generating output to stdout, or there's a target output file and
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# the source file is newer than the target (or the target doesn't
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# exist).
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if self.force or output_file is None or newer(source, output_file):
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if output_file:
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self.mkpath(os.path.dirname(output_file))
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try:
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self.spawn(pp_args)
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except DistutilsExecError, msg:
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raise CompileError, msg
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def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts):
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try:
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self.spawn(self.compiler_so + cc_args + [src, '-o', obj] +
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extra_postargs)
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except DistutilsExecError, msg:
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raise CompileError, msg
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def create_static_lib(self, objects, output_libname,
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output_dir=None, debug=0, target_lang=None):
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objects, output_dir = self._fix_object_args(objects, output_dir)
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output_filename = \
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self.library_filename(output_libname, output_dir=output_dir)
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if self._need_link(objects, output_filename):
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self.mkpath(os.path.dirname(output_filename))
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self.spawn(self.archiver +
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[output_filename] +
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objects + self.objects)
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# Not many Unices required ranlib anymore -- SunOS 4.x is, I
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# think the only major Unix that does. Maybe we need some
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# platform intelligence here to skip ranlib if it's not
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# needed -- or maybe Python's configure script took care of
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# it for us, hence the check for leading colon.
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if self.ranlib:
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try:
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self.spawn(self.ranlib + [output_filename])
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except DistutilsExecError, msg:
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raise LibError, msg
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else:
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log.debug("skipping %s (up-to-date)", output_filename)
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def link(self, target_desc, objects,
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output_filename, output_dir=None, libraries=None,
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library_dirs=None, runtime_library_dirs=None,
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export_symbols=None, debug=0, extra_preargs=None,
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extra_postargs=None, build_temp=None, target_lang=None):
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objects, output_dir = self._fix_object_args(objects, output_dir)
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libraries, library_dirs, runtime_library_dirs = \
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self._fix_lib_args(libraries, library_dirs, runtime_library_dirs)
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lib_opts = gen_lib_options(self, library_dirs, runtime_library_dirs,
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libraries)
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if type(output_dir) not in (StringType, NoneType):
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raise TypeError, "'output_dir' must be a string or None"
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if output_dir is not None:
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output_filename = os.path.join(output_dir, output_filename)
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if self._need_link(objects, output_filename):
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ld_args = (objects + self.objects +
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lib_opts + ['-o', output_filename])
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if debug:
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ld_args[:0] = ['-g']
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if extra_preargs:
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ld_args[:0] = extra_preargs
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if extra_postargs:
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ld_args.extend(extra_postargs)
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self.mkpath(os.path.dirname(output_filename))
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try:
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if target_desc == CCompiler.EXECUTABLE:
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linker = self.linker_exe[:]
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else:
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linker = self.linker_so[:]
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if target_lang == "c++" and self.compiler_cxx:
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linker[0] = self.compiler_cxx[0]
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self.spawn(linker + ld_args)
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except DistutilsExecError, msg:
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raise LinkError, msg
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else:
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log.debug("skipping %s (up-to-date)", output_filename)
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# -- Miscellaneous methods -----------------------------------------
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# These are all used by the 'gen_lib_options() function, in
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# ccompiler.py.
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def library_dir_option(self, dir):
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return "-L" + dir
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def runtime_library_dir_option(self, dir):
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# XXX Hackish, at the very least. See Python bug #445902:
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# http://sourceforge.net/tracker/index.php
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# ?func=detail&aid=445902&group_id=5470&atid=105470
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# Linkers on different platforms need different options to
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# specify that directories need to be added to the list of
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# directories searched for dependencies when a dynamic library
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# is sought. GCC has to be told to pass the -R option through
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# to the linker, whereas other compilers just know this.
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# Other compilers may need something slightly different. At
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# this time, there's no way to determine this information from
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# the configuration data stored in the Python installation, so
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# we use this hack.
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compiler = os.path.basename(sysconfig.get_config_var("CC"))
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if sys.platform[:6] == "darwin":
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# MacOSX's linker doesn't understand the -R flag at all
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return "-L" + dir
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elif compiler[:3] == "gcc" or compiler[:3] == "g++":
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return "-Wl,-R" + dir
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else:
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return "-R" + dir
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def library_option(self, lib):
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return "-l" + lib
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def find_library_file(self, dirs, lib, debug=0):
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shared_f = self.library_filename(lib, lib_type='shared')
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dylib_f = self.library_filename(lib, lib_type='dylib')
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static_f = self.library_filename(lib, lib_type='static')
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for dir in dirs:
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shared = os.path.join(dir, shared_f)
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dylib = os.path.join(dir, dylib_f)
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static = os.path.join(dir, static_f)
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# We're second-guessing the linker here, with not much hard
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# data to go on: GCC seems to prefer the shared library, so I'm
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# assuming that *all* Unix C compilers do. And of course I'm
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# ignoring even GCC's "-static" option. So sue me.
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if os.path.exists(dylib):
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return dylib
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elif os.path.exists(shared):
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return shared
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elif os.path.exists(static):
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return static
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# Oops, didn't find it in *any* of 'dirs'
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return None
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