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File Name : cygwinccompiler.py

"""distutils.cygwinccompiler

Provides the CygwinCCompiler class, a subclass of UnixCCompiler that
handles the Cygwin port of the GNU C compiler to Windows.  It also contains
the Mingw32CCompiler class which handles the mingw32 port of GCC (same as
cygwin in no-cygwin mode).
"""

import os
import re
import sys
import copy
import shlex
import warnings
from subprocess import check_output

from .unixccompiler import UnixCCompiler
from .file_util import write_file
from .errors import (
    DistutilsExecError,
    DistutilsPlatformError,
    CCompilerError,
    CompileError,
)
from .version import LooseVersion, suppress_known_deprecation
from ._collections import RangeMap

_msvcr_lookup = RangeMap.left(
    {
        # MSVC 7.0
        1300: ['msvcr70'],
        # MSVC 7.1
        1310: ['msvcr71'],
        # VS2005 / MSVC 8.0
        1400: ['msvcr80'],
        # VS2008 / MSVC 9.0
        1500: ['msvcr90'],
        # VS2010 / MSVC 10.0
        1600: ['msvcr100'],
        # VS2012 / MSVC 11.0
        1700: ['msvcr110'],
        # VS2013 / MSVC 12.0
        1800: ['msvcr120'],
        # VS2015 / MSVC 14.0
        1900: ['ucrt', 'vcruntime140'],
        2000: RangeMap.undefined_value,
    },
)

def get_msvcr():
    """Include the appropriate MSVC runtime library if Python was built
    with MSVC 7.0 or later.
    """
    match = re.search(r'MSC v\.(\d{4})', sys.version)
    try:
        msc_ver = int(match.group(1))
    except AttributeError:
        return
    try:
        return _msvcr_lookup[msc_ver]
    except KeyError:
        raise ValueError("Unknown MS Compiler version %s " % msc_ver)

_runtime_library_dirs_msg = (
    "Unable to set runtime library search path on Windows, "
    "usually indicated by `runtime_library_dirs` parameter to Extension"
)

class CygwinCCompiler(UnixCCompiler):
    """Handles the Cygwin port of the GNU C compiler to Windows."""

compiler_type = 'cygwin'
    obj_extension = ".o"
    static_lib_extension = ".a"
    shared_lib_extension = ".dll.a"
    dylib_lib_extension = ".dll"
    static_lib_format = "lib%s%s"
    shared_lib_format = "lib%s%s"
    dylib_lib_format = "cyg%s%s"
    exe_extension = ".exe"

def __init__(self, verbose=0, dry_run=0, force=0):

super().__init__(verbose, dry_run, force)

status, details = check_config_h()
        self.debug_print(
            "Python's GCC status: {} (details: {})".format(status, details)
        )
        if status is not CONFIG_H_OK:
            self.warn(
                "Python's pyconfig.h doesn't seem to support your compiler. "
                "Reason: %s. "
                "Compiling may fail because of undefined preprocessor macros." % details
            )

self.cc = os.environ.get('CC', 'gcc')
        self.cxx = os.environ.get('CXX', 'g++')

self.linker_dll = self.cc
        shared_option = "-shared"

self.set_executables(
            compiler='%s -mcygwin -O -Wall' % self.cc,
            compiler_so='%s -mcygwin -mdll -O -Wall' % self.cc,
            compiler_cxx='%s -mcygwin -O -Wall' % self.cxx,
            linker_exe='%s -mcygwin' % self.cc,
            linker_so=('{} -mcygwin {}'.format(self.linker_dll, shared_option)),
        )

# Include the appropriate MSVC runtime library if Python was built
        # with MSVC 7.0 or later.
        self.dll_libraries = get_msvcr()

@property
    def gcc_version(self):
        # Older numpy dependend on this existing to check for ancient
        # gcc versions. This doesn't make much sense with clang etc so
        # just hardcode to something recent.
        # https://github.com/numpy/numpy/pull/20333
        warnings.warn(
            "gcc_version attribute of CygwinCCompiler is deprecated. "
            "Instead of returning actual gcc version a fixed value 11.2.0 is returned.",
            DeprecationWarning,
            stacklevel=2,
        )
        with suppress_known_deprecation():
            return LooseVersion("11.2.0")

def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts):
        """Compiles the source by spawning GCC and windres if needed."""
        if ext == '.rc' or ext == '.res':
            # gcc needs '.res' and '.rc' compiled to object files !!!
            try:
                self.spawn(["windres", "-i", src, "-o", obj])
            except DistutilsExecError as msg:
                raise CompileError(msg)
        else:  # for other files use the C-compiler
            try:
                self.spawn(
                    self.compiler_so + cc_args + [src, '-o', obj] + extra_postargs
                )
            except DistutilsExecError as msg:
                raise CompileError(msg)

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,
    ):
        """Link the objects."""
        # use separate copies, so we can modify the lists
        extra_preargs = copy.copy(extra_preargs or [])
        libraries = copy.copy(libraries or [])
        objects = copy.copy(objects or [])

if runtime_library_dirs:
            self.warn(_runtime_library_dirs_msg)

# Additional libraries
        libraries.extend(self.dll_libraries)

# handle export symbols by creating a def-file
        # with executables this only works with gcc/ld as linker
        if (export_symbols is not None) and (
            target_desc != self.EXECUTABLE or self.linker_dll == "gcc"
        ):
            # (The linker doesn't do anything if output is up-to-date.
            # So it would probably better to check if we really need this,
            # but for this we had to insert some unchanged parts of
            # UnixCCompiler, and this is not what we want.)

# we want to put some files in the same directory as the
            # object files are, build_temp doesn't help much
            # where are the object files
            temp_dir = os.path.dirname(objects[0])
            # name of dll to give the helper files the same base name
            (dll_name, dll_extension) = os.path.splitext(
                os.path.basename(output_filename)
            )

# generate the filenames for these files
            def_file = os.path.join(temp_dir, dll_name + ".def")

# Generate .def file
            contents = ["LIBRARY %s" % os.path.basename(output_filename), "EXPORTS"]
            for sym in export_symbols:
                contents.append(sym)
            self.execute(write_file, (def_file, contents), "writing %s" % def_file)

# next add options for def-file

# for gcc/ld the def-file is specified as any object files
            objects.append(def_file)

# end: if ((export_symbols is not None) and
        #        (target_desc != self.EXECUTABLE or self.linker_dll == "gcc")):

# who wants symbols and a many times larger output file
        # should explicitly switch the debug mode on
        # otherwise we let ld strip the output file
        # (On my machine: 10KiB < stripped_file < ??100KiB
        #   unstripped_file = stripped_file + XXX KiB
        #  ( XXX=254 for a typical python extension))
        if not debug:
            extra_preargs.append("-s")

UnixCCompiler.link(
            self,
            target_desc,
            objects,
            output_filename,
            output_dir,
            libraries,
            library_dirs,
            runtime_library_dirs,
            None,  # export_symbols, we do this in our def-file
            debug,
            extra_preargs,
            extra_postargs,
            build_temp,
            target_lang,
        )

def runtime_library_dir_option(self, dir):
        # cygwin doesn't support rpath. While in theory we could error
        # out like MSVC does, code might expect it to work like on Unix, so
        # just warn and hope for the best.
        self.warn(_runtime_library_dirs_msg)
        return []

# -- Miscellaneous methods -----------------------------------------

def _make_out_path(self, output_dir, strip_dir, src_name):
        # use normcase to make sure '.rc' is really '.rc' and not '.RC'
        norm_src_name = os.path.normcase(src_name)
        return super()._make_out_path(output_dir, strip_dir, norm_src_name)

@property
    def out_extensions(self):
        """
        Add support for rc and res files.
        """
        return {
            **super().out_extensions,
            **{ext: ext + self.obj_extension for ext in ('.res', '.rc')},
        }

# the same as cygwin plus some additional parameters
class Mingw32CCompiler(CygwinCCompiler):
    """Handles the Mingw32 port of the GNU C compiler to Windows."""

compiler_type = 'mingw32'

def __init__(self, verbose=0, dry_run=0, force=0):

super().__init__(verbose, dry_run, force)

shared_option = "-shared"

if is_cygwincc(self.cc):
            raise CCompilerError('Cygwin gcc cannot be used with --compiler=mingw32')

self.set_executables(
            compiler='%s -O -Wall' % self.cc,
            compiler_so='%s -mdll -O -Wall' % self.cc,
            compiler_cxx='%s -O -Wall' % self.cxx,
            linker_exe='%s' % self.cc,
            linker_so='{} {}'.format(self.linker_dll, shared_option),
        )

def runtime_library_dir_option(self, dir):
        raise DistutilsPlatformError(_runtime_library_dirs_msg)

# Because these compilers aren't configured in Python's pyconfig.h file by
# default, we should at least warn the user if he is using an unmodified
# version.

CONFIG_H_OK = "ok"
CONFIG_H_NOTOK = "not ok"
CONFIG_H_UNCERTAIN = "uncertain"

def check_config_h():
    """Check if the current Python installation appears amenable to building
    extensions with GCC.

Returns a tuple (status, details), where 'status' is one of the following
    constants:

- CONFIG_H_OK: all is well, go ahead and compile
    - CONFIG_H_NOTOK: doesn't look good
    - CONFIG_H_UNCERTAIN: not sure -- unable to read pyconfig.h

'details' is a human-readable string explaining the situation.

Note there are two ways to conclude "OK": either 'sys.version' contains
    the string "GCC" (implying that this Python was built with GCC), or the
    installed "pyconfig.h" contains the string "__GNUC__".
    """

# XXX since this function also checks sys.version, it's not strictly a
    # "pyconfig.h" check -- should probably be renamed...

from distutils import sysconfig

# if sys.version contains GCC then python was compiled with GCC, and the
    # pyconfig.h file should be OK
    if "GCC" in sys.version:
        return CONFIG_H_OK, "sys.version mentions 'GCC'"

# Clang would also work
    if "Clang" in sys.version:
        return CONFIG_H_OK, "sys.version mentions 'Clang'"

# let's see if __GNUC__ is mentioned in python.h
    fn = sysconfig.get_config_h_filename()
    try:
        config_h = open(fn)
        try:
            if "__GNUC__" in config_h.read():
                return CONFIG_H_OK, "'%s' mentions '__GNUC__'" % fn
            else:
                return CONFIG_H_NOTOK, "'%s' does not mention '__GNUC__'" % fn
        finally:
            config_h.close()
    except OSError as exc:
        return (CONFIG_H_UNCERTAIN, "couldn't read '{}': {}".format(fn, exc.strerror))

def is_cygwincc(cc):
    '''Try to determine if the compiler that would be used is from cygwin.'''
    out_string = check_output(shlex.split(cc) + ['-dumpmachine'])
    return out_string.strip().endswith(b'cygwin')

get_versions = None
"""
A stand-in for the previous get_versions() function to prevent failures
when monkeypatched. See pypa/setuptools#2969.
"""

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/linksafe	drwxr-xr-x	2025-02-03 03:49:08
..	dir	-	root/linksafe	drwxr-xr-x	2025-02-03 03:49:08
__pycache__	dir	-	root/linksafe	drwxr-xr-x	2025-02-03 03:49:08
command	dir	-	root/linksafe	drwxr-xr-x	2025-02-03 03:49:08
__init__.py	text/x-script.python	359 B	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
_collections.py	text/x-script.python	5.18 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
_functools.py	text/x-script.python	411 B	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
_log.py	text/plain	43 B	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
_macos_compat.py	text/x-script.python	239 B	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
_msvccompiler.py	text/plain	19.18 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
archive_util.py	text/plain	8.37 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
bcppcompiler.py	text/plain	14.41 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
ccompiler.py	text/plain	46.2 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
cmd.py	text/plain	17.45 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
config.py	text/plain	4.8 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
core.py	text/plain	9.18 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
cygwinccompiler.py	text/plain	11.66 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
debug.py	text/plain	139 B	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
dep_util.py	text/plain	3.33 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
dir_util.py	text/plain	7.88 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
dist.py	text/plain	49.01 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
errors.py	text/plain	3.5 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
extension.py	text/plain	10.03 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
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unixccompiler.py	text/plain	15.24 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
util.py	text/plain	17.67 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
version.py	text/x-script.python	12.65 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59
versionpredicate.py	text/plain	5.08 KB	root/linksafe	-rw-r--r--	2023-11-13 10:05:59