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333 lines
15 KiB
Python
333 lines
15 KiB
Python
2 years ago
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"""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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import os, sys, re
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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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if sys.platform == 'darwin':
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import _osx_support
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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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xcode_stub_lib_extension = ".tbd"
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static_lib_format = shared_lib_format = dylib_lib_format = "lib%s%s"
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xcode_stub_lib_format = dylib_lib_format
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if sys.platform == "cygwin":
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exe_extension = ".exe"
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def preprocess(self, source, output_file=None, macros=None,
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include_dirs=None, extra_preargs=None, extra_postargs=None):
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fixed_args = self._fix_compile_args(None, macros, include_dirs)
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ignore, macros, include_dirs = fixed_args
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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 as 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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compiler_so = self.compiler_so
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if sys.platform == 'darwin':
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compiler_so = _osx_support.compiler_fixup(compiler_so,
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cc_args + extra_postargs)
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try:
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self.spawn(compiler_so + cc_args + [src, '-o', obj] +
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extra_postargs)
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except DistutilsExecError as 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 as 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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fixed_args = self._fix_lib_args(libraries, library_dirs,
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runtime_library_dirs)
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libraries, library_dirs, runtime_library_dirs = fixed_args
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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 not isinstance(output_dir, (str, type(None))):
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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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# skip over environment variable settings if /usr/bin/env
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# is used to set up the linker's environment.
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# This is needed on OSX. Note: this assumes that the
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# normal and C++ compiler have the same environment
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# settings.
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i = 0
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if os.path.basename(linker[0]) == "env":
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i = 1
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while '=' in linker[i]:
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i += 1
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if os.path.basename(linker[i]) == 'ld_so_aix':
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# AIX platforms prefix the compiler with the ld_so_aix
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# script, so we need to adjust our linker index
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offset = 1
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else:
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offset = 0
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linker[i+offset] = self.compiler_cxx[i]
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if sys.platform == 'darwin':
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linker = _osx_support.compiler_fixup(linker, ld_args)
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self.spawn(linker + ld_args)
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except DistutilsExecError as 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 _is_gcc(self, compiler_name):
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return "gcc" in compiler_name or "g++" in compiler_name
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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 on GNU systems (Linux, FreeBSD, ...) has to
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# be told to pass the -R option through to the linker, whereas
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# other compilers and gcc on other systems 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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from distutils.util import get_macosx_target_ver, split_version
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macosx_target_ver = get_macosx_target_ver()
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if macosx_target_ver and split_version(macosx_target_ver) >= [10, 5]:
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return "-Wl,-rpath," + dir
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else: # no support for -rpath on earlier macOS versions
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return "-L" + dir
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elif sys.platform[:7] == "freebsd":
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return "-Wl,-rpath=" + dir
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elif sys.platform[:5] == "hp-ux":
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if self._is_gcc(compiler):
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return ["-Wl,+s", "-L" + dir]
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return ["+s", "-L" + dir]
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else:
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if self._is_gcc(compiler):
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# gcc on non-GNU systems does not need -Wl, but can
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# use it anyway. Since distutils has always passed in
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# -Wl whenever gcc was used in the past it is probably
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# safest to keep doing so.
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if sysconfig.get_config_var("GNULD") == "yes":
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# GNU ld needs an extra option to get a RUNPATH
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# instead of just an RPATH.
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return "-Wl,--enable-new-dtags,-R" + dir
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else:
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return "-Wl,-R" + dir
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else:
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# No idea how --enable-new-dtags would be passed on to
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# ld if this system was using GNU ld. Don't know if a
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# system like this even exists.
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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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xcode_stub_f = self.library_filename(lib, lib_type='xcode_stub')
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static_f = self.library_filename(lib, lib_type='static')
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if sys.platform == 'darwin':
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# On OSX users can specify an alternate SDK using
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# '-isysroot', calculate the SDK root if it is specified
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# (and use it further on)
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#
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# Note that, as of Xcode 7, Apple SDKs may contain textual stub
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# libraries with .tbd extensions rather than the normal .dylib
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# shared libraries installed in /. The Apple compiler tool
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# chain handles this transparently but it can cause problems
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# for programs that are being built with an SDK and searching
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# for specific libraries. Callers of find_library_file need to
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# keep in mind that the base filename of the returned SDK library
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# file might have a different extension from that of the library
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# file installed on the running system, for example:
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# /Applications/Xcode.app/Contents/Developer/Platforms/
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# MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/
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# usr/lib/libedit.tbd
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# vs
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# /usr/lib/libedit.dylib
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cflags = sysconfig.get_config_var('CFLAGS')
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m = re.search(r'-isysroot\s*(\S+)', cflags)
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if m is None:
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sysroot = '/'
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else:
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sysroot = m.group(1)
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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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xcode_stub = os.path.join(dir, xcode_stub_f)
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if sys.platform == 'darwin' and (
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dir.startswith('/System/') or (
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dir.startswith('/usr/') and not dir.startswith('/usr/local/'))):
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shared = os.path.join(sysroot, dir[1:], shared_f)
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dylib = os.path.join(sysroot, dir[1:], dylib_f)
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static = os.path.join(sysroot, dir[1:], static_f)
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xcode_stub = os.path.join(sysroot, dir[1:], xcode_stub_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(xcode_stub):
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return xcode_stub
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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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