402 lines
15 KiB
Python
402 lines
15 KiB
Python
"""distutils.unixccompiler
|
|
|
|
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
|
|
import sys
|
|
import re
|
|
import shlex
|
|
import itertools
|
|
|
|
from distutils import sysconfig
|
|
from distutils.dep_util import newer
|
|
from distutils.ccompiler import CCompiler, gen_preprocess_options, gen_lib_options
|
|
from distutils.errors import DistutilsExecError, CompileError, LibError, LinkError
|
|
from distutils import log
|
|
from ._macos_compat import compiler_fixup
|
|
|
|
# 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 _split_env(cmd):
|
|
"""
|
|
For macOS, split command into 'env' portion (if any)
|
|
and the rest of the linker command.
|
|
|
|
>>> _split_env(['a', 'b', 'c'])
|
|
([], ['a', 'b', 'c'])
|
|
>>> _split_env(['/usr/bin/env', 'A=3', 'gcc'])
|
|
(['/usr/bin/env', 'A=3'], ['gcc'])
|
|
"""
|
|
pivot = 0
|
|
if os.path.basename(cmd[0]) == "env":
|
|
pivot = 1
|
|
while '=' in cmd[pivot]:
|
|
pivot += 1
|
|
return cmd[:pivot], cmd[pivot:]
|
|
|
|
|
|
def _split_aix(cmd):
|
|
"""
|
|
AIX platforms prefix the compiler with the ld_so_aix
|
|
script, so split that from the linker command.
|
|
|
|
>>> _split_aix(['a', 'b', 'c'])
|
|
([], ['a', 'b', 'c'])
|
|
>>> _split_aix(['/bin/foo/ld_so_aix', 'gcc'])
|
|
(['/bin/foo/ld_so_aix'], ['gcc'])
|
|
"""
|
|
pivot = os.path.basename(cmd[0]) == 'ld_so_aix'
|
|
return cmd[:pivot], cmd[pivot:]
|
|
|
|
|
|
def _linker_params(linker_cmd, compiler_cmd):
|
|
"""
|
|
The linker command usually begins with the compiler
|
|
command (possibly multiple elements), followed by zero or more
|
|
params for shared library building.
|
|
|
|
If the LDSHARED env variable overrides the linker command,
|
|
however, the commands may not match.
|
|
|
|
Return the best guess of the linker parameters by stripping
|
|
the linker command. If the compiler command does not
|
|
match the linker command, assume the linker command is
|
|
just the first element.
|
|
|
|
>>> _linker_params('gcc foo bar'.split(), ['gcc'])
|
|
['foo', 'bar']
|
|
>>> _linker_params('gcc foo bar'.split(), ['other'])
|
|
['foo', 'bar']
|
|
>>> _linker_params('ccache gcc foo bar'.split(), 'ccache gcc'.split())
|
|
['foo', 'bar']
|
|
>>> _linker_params(['gcc'], ['gcc'])
|
|
[]
|
|
"""
|
|
c_len = len(compiler_cmd)
|
|
pivot = c_len if linker_cmd[:c_len] == compiler_cmd else 1
|
|
return linker_cmd[pivot:]
|
|
|
|
|
|
class UnixCCompiler(CCompiler):
|
|
|
|
compiler_type = 'unix'
|
|
|
|
# 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"
|
|
xcode_stub_lib_extension = ".tbd"
|
|
static_lib_format = shared_lib_format = dylib_lib_format = "lib%s%s"
|
|
xcode_stub_lib_format = dylib_lib_format
|
|
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,
|
|
):
|
|
fixed_args = self._fix_compile_args(None, macros, include_dirs)
|
|
ignore, macros, include_dirs = fixed_args
|
|
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)
|
|
|
|
# reasons to preprocess:
|
|
# - force is indicated
|
|
# - output is directed to stdout
|
|
# - source file is newer than the target
|
|
preprocess = self.force or output_file is None or newer(source, output_file)
|
|
if not preprocess:
|
|
return
|
|
|
|
if output_file:
|
|
self.mkpath(os.path.dirname(output_file))
|
|
|
|
try:
|
|
self.spawn(pp_args)
|
|
except DistutilsExecError as msg:
|
|
raise CompileError(msg)
|
|
|
|
def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts):
|
|
compiler_so = compiler_fixup(self.compiler_so, cc_args + extra_postargs)
|
|
try:
|
|
self.spawn(compiler_so + cc_args + [src, '-o', obj] + extra_postargs)
|
|
except DistutilsExecError as msg:
|
|
raise CompileError(msg)
|
|
|
|
def create_static_lib(
|
|
self, objects, output_libname, output_dir=None, debug=0, 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 DistutilsExecError as msg:
|
|
raise LibError(msg)
|
|
else:
|
|
log.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=0,
|
|
extra_preargs=None,
|
|
extra_postargs=None,
|
|
build_temp=None,
|
|
target_lang=None,
|
|
):
|
|
objects, output_dir = self._fix_object_args(objects, output_dir)
|
|
fixed_args = self._fix_lib_args(libraries, library_dirs, runtime_library_dirs)
|
|
libraries, library_dirs, runtime_library_dirs = fixed_args
|
|
|
|
lib_opts = gen_lib_options(self, library_dirs, runtime_library_dirs, libraries)
|
|
if not isinstance(output_dir, (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:
|
|
# Select a linker based on context: linker_exe when
|
|
# building an executable or linker_so (with shared options)
|
|
# when building a shared library.
|
|
building_exe = target_desc == CCompiler.EXECUTABLE
|
|
linker = (self.linker_exe if building_exe else self.linker_so)[:]
|
|
|
|
if target_lang == "c++" and self.compiler_cxx:
|
|
env, linker_ne = _split_env(linker)
|
|
aix, linker_na = _split_aix(linker_ne)
|
|
_, compiler_cxx_ne = _split_env(self.compiler_cxx)
|
|
_, linker_exe_ne = _split_env(self.linker_exe)
|
|
|
|
params = _linker_params(linker_na, linker_exe_ne)
|
|
linker = env + aix + compiler_cxx_ne + params
|
|
|
|
linker = compiler_fixup(linker, ld_args)
|
|
|
|
self.spawn(linker + ld_args)
|
|
except DistutilsExecError as msg:
|
|
raise LinkError(msg)
|
|
else:
|
|
log.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):
|
|
cc_var = sysconfig.get_config_var("CC")
|
|
compiler = os.path.basename(shlex.split(cc_var)[0])
|
|
return "gcc" in compiler or "g++" in compiler
|
|
|
|
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.
|
|
if sys.platform[:6] == "darwin":
|
|
from distutils.util import get_macosx_target_ver, split_version
|
|
|
|
macosx_target_ver = get_macosx_target_ver()
|
|
if macosx_target_ver and split_version(macosx_target_ver) >= [10, 5]:
|
|
return "-Wl,-rpath," + dir
|
|
else: # no support for -rpath on earlier macOS versions
|
|
return "-L" + dir
|
|
elif sys.platform[:7] == "freebsd":
|
|
return "-Wl,-rpath=" + dir
|
|
elif sys.platform[:5] == "hp-ux":
|
|
return [
|
|
"-Wl,+s" if self._is_gcc() else "+s",
|
|
"-L" + dir,
|
|
]
|
|
|
|
# For all compilers, `-Wl` is the presumed way to
|
|
# pass a compiler option to the linker and `-R` is
|
|
# the way to pass an RPATH.
|
|
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
|
|
|
|
def library_option(self, lib):
|
|
return "-l" + lib
|
|
|
|
@staticmethod
|
|
def _library_root(dir):
|
|
"""
|
|
macOS users can specify an alternate SDK using'-isysroot'.
|
|
Calculate the SDK root if it is specified.
|
|
|
|
Note that, as of Xcode 7, Apple SDKs may contain textual stub
|
|
libraries with .tbd extensions rather than the normal .dylib
|
|
shared libraries installed in /. The Apple compiler tool
|
|
chain handles this transparently but it can cause problems
|
|
for programs that are being built with an SDK and searching
|
|
for specific libraries. Callers of find_library_file need to
|
|
keep in mind that the base filename of the returned SDK library
|
|
file might have a different extension from that of the library
|
|
file installed on the running system, for example:
|
|
/Applications/Xcode.app/Contents/Developer/Platforms/
|
|
MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/
|
|
usr/lib/libedit.tbd
|
|
vs
|
|
/usr/lib/libedit.dylib
|
|
"""
|
|
cflags = sysconfig.get_config_var('CFLAGS')
|
|
match = re.search(r'-isysroot\s*(\S+)', cflags)
|
|
|
|
apply_root = (
|
|
sys.platform == 'darwin'
|
|
and match
|
|
and (
|
|
dir.startswith('/System/')
|
|
or (dir.startswith('/usr/') and not dir.startswith('/usr/local/'))
|
|
)
|
|
)
|
|
|
|
return os.path.join(match.group(1), dir[1:]) if apply_root else dir
|
|
|
|
def find_library_file(self, dirs, lib, debug=0):
|
|
r"""
|
|
Second-guess the linker with not much hard
|
|
data to go on: GCC seems to prefer the shared library, so
|
|
assume that *all* Unix C compilers do,
|
|
ignoring even GCC's "-static" option.
|
|
|
|
>>> compiler = UnixCCompiler()
|
|
>>> compiler._library_root = lambda dir: dir
|
|
>>> monkeypatch = getfixture('monkeypatch')
|
|
>>> monkeypatch.setattr(os.path, 'exists', lambda d: 'existing' in d)
|
|
>>> dirs = ('/foo/bar/missing', '/foo/bar/existing')
|
|
>>> compiler.find_library_file(dirs, 'abc').replace('\\', '/')
|
|
'/foo/bar/existing/libabc.dylib'
|
|
>>> compiler.find_library_file(reversed(dirs), 'abc').replace('\\', '/')
|
|
'/foo/bar/existing/libabc.dylib'
|
|
>>> monkeypatch.setattr(os.path, 'exists',
|
|
... lambda d: 'existing' in d and '.a' in d)
|
|
>>> compiler.find_library_file(dirs, 'abc').replace('\\', '/')
|
|
'/foo/bar/existing/libabc.a'
|
|
>>> compiler.find_library_file(reversed(dirs), 'abc').replace('\\', '/')
|
|
'/foo/bar/existing/libabc.a'
|
|
"""
|
|
lib_names = (
|
|
self.library_filename(lib, lib_type=type)
|
|
for type in 'dylib xcode_stub shared static'.split()
|
|
)
|
|
|
|
roots = map(self._library_root, dirs)
|
|
|
|
searched = (
|
|
os.path.join(root, lib_name)
|
|
for root, lib_name in itertools.product(roots, lib_names)
|
|
)
|
|
|
|
found = filter(os.path.exists, searched)
|
|
|
|
# Return None if it could not be found in any dir.
|
|
return next(found, None)
|