initial import of the packaging package in the standard library
diff --git a/Lib/packaging/compiler/unixccompiler.py b/Lib/packaging/compiler/unixccompiler.py
new file mode 100644
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--- /dev/null
+++ b/Lib/packaging/compiler/unixccompiler.py
@@ -0,0 +1,339 @@
+"""CCompiler implementation for Unix compilers.
+
+This module contains the UnixCCompiler class, a subclass of CCompiler
+that handles the "typical" Unix-style command-line C compiler:
+ * macros defined with -Dname[=value]
+ * macros undefined with -Uname
+ * include search directories specified with -Idir
+ * libraries specified with -lllib
+ * library search directories specified with -Ldir
+ * compile handled by 'cc' (or similar) executable with -c option:
+ compiles .c to .o
+ * link static library handled by 'ar' command (possibly with 'ranlib')
+ * link shared library handled by 'cc -shared'
+"""
+
+import os, sys
+
+from packaging.util import newer
+from packaging.compiler.ccompiler import CCompiler
+from packaging.compiler import gen_preprocess_options, gen_lib_options
+from packaging.errors import (PackagingExecError, CompileError,
+ LibError, LinkError)
+from packaging import logger
+import sysconfig
+
+
+# XXX Things not currently handled:
+# * optimization/debug/warning flags; we just use whatever's in Python's
+# Makefile and live with it. Is this adequate? If not, we might
+# have to have a bunch of subclasses GNUCCompiler, SGICCompiler,
+# SunCCompiler, and I suspect down that road lies madness.
+# * even if we don't know a warning flag from an optimization flag,
+# we need some way for outsiders to feed preprocessor/compiler/linker
+# flags in to us -- eg. a sysadmin might want to mandate certain flags
+# via a site config file, or a user might want to set something for
+# compiling this module distribution only via the setup.py command
+# line, whatever. As long as these options come from something on the
+# current system, they can be as system-dependent as they like, and we
+# should just happily stuff them into the preprocessor/compiler/linker
+# options and carry on.
+
+def _darwin_compiler_fixup(compiler_so, cc_args):
+ """
+ This function will strip '-isysroot PATH' and '-arch ARCH' from the
+ compile flags if the user has specified one them in extra_compile_flags.
+
+ This is needed because '-arch ARCH' adds another architecture to the
+ build, without a way to remove an architecture. Furthermore GCC will
+ barf if multiple '-isysroot' arguments are present.
+ """
+ stripArch = stripSysroot = False
+
+ compiler_so = list(compiler_so)
+ kernel_version = os.uname()[2] # 8.4.3
+ major_version = int(kernel_version.split('.')[0])
+
+ if major_version < 8:
+ # OSX before 10.4.0, these don't support -arch and -isysroot at
+ # all.
+ stripArch = stripSysroot = True
+ else:
+ stripArch = '-arch' in cc_args
+ stripSysroot = '-isysroot' in cc_args
+
+ if stripArch or 'ARCHFLAGS' in os.environ:
+ while True:
+ try:
+ index = compiler_so.index('-arch')
+ # Strip this argument and the next one:
+ del compiler_so[index:index+2]
+ except ValueError:
+ break
+
+ if 'ARCHFLAGS' in os.environ and not stripArch:
+ # User specified different -arch flags in the environ,
+ # see also the sysconfig
+ compiler_so = compiler_so + os.environ['ARCHFLAGS'].split()
+
+ if stripSysroot:
+ try:
+ index = compiler_so.index('-isysroot')
+ # Strip this argument and the next one:
+ del compiler_so[index:index+2]
+ except ValueError:
+ pass
+
+ # Check if the SDK that is used during compilation actually exists,
+ # the universal build requires the usage of a universal SDK and not all
+ # users have that installed by default.
+ sysroot = None
+ if '-isysroot' in cc_args:
+ idx = cc_args.index('-isysroot')
+ sysroot = cc_args[idx+1]
+ elif '-isysroot' in compiler_so:
+ idx = compiler_so.index('-isysroot')
+ sysroot = compiler_so[idx+1]
+
+ if sysroot and not os.path.isdir(sysroot):
+ logger.warning(
+ "compiling with an SDK that doesn't seem to exist: %r;\n"
+ "please check your Xcode installation", sysroot)
+
+ return compiler_so
+
+class UnixCCompiler(CCompiler):
+
+ name = 'unix'
+ description = 'Standard UNIX-style compiler'
+
+ # These are used by CCompiler in two places: the constructor sets
+ # instance attributes 'preprocessor', 'compiler', etc. from them, and
+ # 'set_executable()' allows any of these to be set. The defaults here
+ # are pretty generic; they will probably have to be set by an outsider
+ # (eg. using information discovered by the sysconfig about building
+ # Python extensions).
+ executables = {'preprocessor' : None,
+ 'compiler' : ["cc"],
+ 'compiler_so' : ["cc"],
+ 'compiler_cxx' : ["cc"],
+ 'linker_so' : ["cc", "-shared"],
+ 'linker_exe' : ["cc"],
+ 'archiver' : ["ar", "-cr"],
+ 'ranlib' : None,
+ }
+
+ if sys.platform[:6] == "darwin":
+ executables['ranlib'] = ["ranlib"]
+
+ # Needed for the filename generation methods provided by the base
+ # class, CCompiler. NB. whoever instantiates/uses a particular
+ # UnixCCompiler instance should set 'shared_lib_ext' -- we set a
+ # reasonable common default here, but it's not necessarily used on all
+ # Unices!
+
+ src_extensions = [".c",".C",".cc",".cxx",".cpp",".m"]
+ obj_extension = ".o"
+ static_lib_extension = ".a"
+ shared_lib_extension = ".so"
+ dylib_lib_extension = ".dylib"
+ static_lib_format = shared_lib_format = dylib_lib_format = "lib%s%s"
+ if sys.platform == "cygwin":
+ exe_extension = ".exe"
+
+ def preprocess(self, source,
+ output_file=None, macros=None, include_dirs=None,
+ extra_preargs=None, extra_postargs=None):
+ ignore, macros, include_dirs = \
+ self._fix_compile_args(None, macros, include_dirs)
+ pp_opts = gen_preprocess_options(macros, include_dirs)
+ pp_args = self.preprocessor + pp_opts
+ if output_file:
+ pp_args.extend(('-o', output_file))
+ if extra_preargs:
+ pp_args[:0] = extra_preargs
+ if extra_postargs:
+ pp_args.extend(extra_postargs)
+ pp_args.append(source)
+
+ # We need to preprocess: either we're being forced to, or we're
+ # generating output to stdout, or there's a target output file and
+ # the source file is newer than the target (or the target doesn't
+ # exist).
+ if self.force or output_file is None or newer(source, output_file):
+ if output_file:
+ self.mkpath(os.path.dirname(output_file))
+ try:
+ self.spawn(pp_args)
+ except PackagingExecError as msg:
+ raise CompileError(msg)
+
+ def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts):
+ compiler_so = self.compiler_so
+ if sys.platform == 'darwin':
+ compiler_so = _darwin_compiler_fixup(compiler_so, cc_args + extra_postargs)
+ try:
+ self.spawn(compiler_so + cc_args + [src, '-o', obj] +
+ extra_postargs)
+ except PackagingExecError as msg:
+ raise CompileError(msg)
+
+ def create_static_lib(self, objects, output_libname,
+ output_dir=None, debug=False, target_lang=None):
+ objects, output_dir = self._fix_object_args(objects, output_dir)
+
+ output_filename = \
+ self.library_filename(output_libname, output_dir=output_dir)
+
+ if self._need_link(objects, output_filename):
+ self.mkpath(os.path.dirname(output_filename))
+ self.spawn(self.archiver +
+ [output_filename] +
+ objects + self.objects)
+
+ # Not many Unices required ranlib anymore -- SunOS 4.x is, I
+ # think the only major Unix that does. Maybe we need some
+ # platform intelligence here to skip ranlib if it's not
+ # needed -- or maybe Python's configure script took care of
+ # it for us, hence the check for leading colon.
+ if self.ranlib:
+ try:
+ self.spawn(self.ranlib + [output_filename])
+ except PackagingExecError as msg:
+ raise LibError(msg)
+ else:
+ logger.debug("skipping %s (up-to-date)", output_filename)
+
+ def link(self, target_desc, objects,
+ output_filename, output_dir=None, libraries=None,
+ library_dirs=None, runtime_library_dirs=None,
+ export_symbols=None, debug=False, extra_preargs=None,
+ extra_postargs=None, build_temp=None, target_lang=None):
+ objects, output_dir = self._fix_object_args(objects, output_dir)
+ libraries, library_dirs, runtime_library_dirs = \
+ self._fix_lib_args(libraries, library_dirs, runtime_library_dirs)
+
+ lib_opts = gen_lib_options(self, library_dirs, runtime_library_dirs,
+ libraries)
+ if type(output_dir) not in (str, type(None)):
+ raise TypeError("'output_dir' must be a string or None")
+ if output_dir is not None:
+ output_filename = os.path.join(output_dir, output_filename)
+
+ if self._need_link(objects, output_filename):
+ ld_args = (objects + self.objects +
+ lib_opts + ['-o', output_filename])
+ if debug:
+ ld_args[:0] = ['-g']
+ if extra_preargs:
+ ld_args[:0] = extra_preargs
+ if extra_postargs:
+ ld_args.extend(extra_postargs)
+ self.mkpath(os.path.dirname(output_filename))
+ try:
+ if target_desc == CCompiler.EXECUTABLE:
+ linker = self.linker_exe[:]
+ else:
+ linker = self.linker_so[:]
+ if target_lang == "c++" and self.compiler_cxx:
+ # skip over environment variable settings if /usr/bin/env
+ # is used to set up the linker's environment.
+ # This is needed on OSX. Note: this assumes that the
+ # normal and C++ compiler have the same environment
+ # settings.
+ i = 0
+ if os.path.basename(linker[0]) == "env":
+ i = 1
+ while '=' in linker[i]:
+ i = i + 1
+
+ linker[i] = self.compiler_cxx[i]
+
+ if sys.platform == 'darwin':
+ linker = _darwin_compiler_fixup(linker, ld_args)
+
+ self.spawn(linker + ld_args)
+ except PackagingExecError as msg:
+ raise LinkError(msg)
+ else:
+ logger.debug("skipping %s (up-to-date)", output_filename)
+
+ # -- Miscellaneous methods -----------------------------------------
+ # These are all used by the 'gen_lib_options() function, in
+ # ccompiler.py.
+
+ def library_dir_option(self, dir):
+ return "-L" + dir
+
+ def _is_gcc(self, compiler_name):
+ return "gcc" in compiler_name or "g++" in compiler_name
+
+ def runtime_library_dir_option(self, dir):
+ # XXX Hackish, at the very least. See Python bug #445902:
+ # http://sourceforge.net/tracker/index.php
+ # ?func=detail&aid=445902&group_id=5470&atid=105470
+ # Linkers on different platforms need different options to
+ # specify that directories need to be added to the list of
+ # directories searched for dependencies when a dynamic library
+ # is sought. GCC on GNU systems (Linux, FreeBSD, ...) has to
+ # be told to pass the -R option through to the linker, whereas
+ # other compilers and gcc on other systems just know this.
+ # Other compilers may need something slightly different. At
+ # this time, there's no way to determine this information from
+ # the configuration data stored in the Python installation, so
+ # we use this hack.
+
+ compiler = os.path.basename(sysconfig.get_config_var("CC"))
+ if sys.platform[:6] == "darwin":
+ # MacOSX's linker doesn't understand the -R flag at all
+ return "-L" + dir
+ elif sys.platform[:5] == "hp-ux":
+ if self._is_gcc(compiler):
+ return ["-Wl,+s", "-L" + dir]
+ return ["+s", "-L" + dir]
+ elif sys.platform[:7] == "irix646" or sys.platform[:6] == "osf1V5":
+ return ["-rpath", dir]
+ elif self._is_gcc(compiler):
+ # gcc on non-GNU systems does not need -Wl, but can
+ # use it anyway. Since distutils has always passed in
+ # -Wl whenever gcc was used in the past it is probably
+ # safest to keep doing so.
+ if sysconfig.get_config_var("GNULD") == "yes":
+ # GNU ld needs an extra option to get a RUNPATH
+ # instead of just an RPATH.
+ return "-Wl,--enable-new-dtags,-R" + dir
+ else:
+ return "-Wl,-R" + dir
+ elif sys.platform[:3] == "aix":
+ return "-blibpath:" + dir
+ else:
+ # No idea how --enable-new-dtags would be passed on to
+ # ld if this system was using GNU ld. Don't know if a
+ # system like this even exists.
+ return "-R" + dir
+
+ def library_option(self, lib):
+ return "-l" + lib
+
+ def find_library_file(self, dirs, lib, debug=False):
+ shared_f = self.library_filename(lib, lib_type='shared')
+ dylib_f = self.library_filename(lib, lib_type='dylib')
+ static_f = self.library_filename(lib, lib_type='static')
+
+ for dir in dirs:
+ shared = os.path.join(dir, shared_f)
+ dylib = os.path.join(dir, dylib_f)
+ static = os.path.join(dir, static_f)
+ # We're second-guessing the linker here, with not much hard
+ # data to go on: GCC seems to prefer the shared library, so I'm
+ # assuming that *all* Unix C compilers do. And of course I'm
+ # ignoring even GCC's "-static" option. So sue me.
+ if os.path.exists(dylib):
+ return dylib
+ elif os.path.exists(shared):
+ return shared
+ elif os.path.exists(static):
+ return static
+
+ # Oops, didn't find it in *any* of 'dirs'
+ return None