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File Content: `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).
"""

# problems:
#
# * if you use a msvc compiled python version (1.5.2)
#   1. you have to insert a __GNUC__ section in its config.h
#   2. you have to generate an import library for its dll
#      - create a def-file for python??.dll
#      - create an import library using
#             dlltool --dllname python15.dll --def python15.def \
#                       --output-lib libpython15.a
#
#   see also http://starship.python.net/crew/kernr/mingw32/Notes.html
#
# * We put export_symbols in a def-file, and don't use
#   --export-all-symbols because it doesn't worked reliable in some
#   tested configurations. And because other windows compilers also
#   need their symbols specified this no serious problem.
#
# tested configurations:
#
# * cygwin gcc 2.91.57/ld 2.9.4/dllwrap 0.2.4 works
#   (after patching python's config.h and for C++ some other include files)
#   see also http://starship.python.net/crew/kernr/mingw32/Notes.html
# * mingw32 gcc 2.95.2/ld 2.9.4/dllwrap 0.2.4 works
#   (ld doesn't support -shared, so we use dllwrap)
# * cygwin gcc 2.95.2/ld 2.10.90/dllwrap 2.10.90 works now
#   - its dllwrap doesn't work, there is a bug in binutils 2.10.90
#     see also http://sources.redhat.com/ml/cygwin/2000-06/msg01274.html
#   - using gcc -mdll instead dllwrap doesn't work without -static because
#     it tries to link against dlls instead their import libraries. (If
#     it finds the dll first.)
#     By specifying -static we force ld to link against the import libraries,
#     this is windows standard and there are normally not the necessary symbols
#     in the dlls.
#   *** only the version of June 2000 shows these problems
# * cygwin gcc 3.2/ld 2.13.90 works
#   (ld supports -shared)
# * mingw gcc 3.2/ld 2.13 works
#   (ld supports -shared)

import os
import sys
import copy
from subprocess import Popen, PIPE, check_output
import re

from distutils.ccompiler import gen_preprocess_options, gen_lib_options
from distutils.unixccompiler import UnixCCompiler
from distutils.file_util import write_file
from distutils.errors import (DistutilsExecError, CCompilerError,
        CompileError, UnknownFileError)
from distutils import log
from distutils.version import LooseVersion
from distutils.spawn import find_executable

def get_msvcr():
    """Include the appropriate MSVC runtime library if Python was built
    with MSVC 7.0 or later.
    """
    msc_pos = sys.version.find('MSC v.')
    if msc_pos != -1:
        msc_ver = sys.version[msc_pos+6:msc_pos+10]
        if msc_ver == '1300':
            # MSVC 7.0
            return ['msvcr70']
        elif msc_ver == '1310':
            # MSVC 7.1
            return ['msvcr71']
        elif msc_ver == '1400':
            # VS2005 / MSVC 8.0
            return ['msvcr80']
        elif msc_ver == '1500':
            # VS2008 / MSVC 9.0
            return ['msvcr90']
        elif msc_ver == '1600':
            # VS2010 / MSVC 10.0
            return ['msvcr100']
        else:
            raise ValueError("Unknown MS Compiler version %s " % msc_ver)


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"
    static_lib_format = "lib%s%s"
    shared_lib_format = "%s%s"
    exe_extension = ".exe"

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

        UnixCCompiler.__init__(self, verbose, dry_run, force)

        status, details = check_config_h()
        self.debug_print("Python's GCC status: %s (details: %s)" %
                         (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.gcc_version, self.ld_version, self.dllwrap_version = \
            get_versions()
        self.debug_print(self.compiler_type + ": gcc %s, ld %s, dllwrap %s\n" %
                         (self.gcc_version,
                          self.ld_version,
                          self.dllwrap_version) )

        # ld_version >= "2.10.90" and < "2.13" should also be able to use
        # gcc -mdll instead of dllwrap
        # Older dllwraps had own version numbers, newer ones use the
        # same as the rest of binutils ( also ld )
        # dllwrap 2.10.90 is buggy
        if self.ld_version >= "2.10.90":
            self.linker_dll = "gcc"
        else:
            self.linker_dll = "dllwrap"

        # ld_version >= "2.13" support -shared so use it instead of
        # -mdll -static
        if self.ld_version >= "2.13":
            shared_option = "-shared"
        else:
            shared_option = "-mdll -static"

        # Hard-code GCC because that's what this is all about.
        # XXX optimization, warnings etc. should be customizable.
        self.set_executables(compiler='gcc -mcygwin -O -Wall',
                             compiler_so='gcc -mcygwin -mdll -O -Wall',
                             compiler_cxx='g++ -mcygwin -O -Wall',
                             linker_exe='gcc -mcygwin',
                             linker_so=('%s -mcygwin %s' %
                                        (self.linker_dll, shared_option)))

        # cygwin and mingw32 need different sets of libraries
        if self.gcc_version == "2.91.57":
            # cygwin shouldn't need msvcrt, but without the dlls will crash
            # (gcc version 2.91.57) -- perhaps something about initialization
            self.dll_libraries=["msvcrt"]
            self.warn(
                "Consider upgrading to a newer version of gcc")
        else:
            # Include the appropriate MSVC runtime library if Python was built
            # with MSVC 7.0 or later.
            self.dll_libraries = get_msvcr()

    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 [])

        # 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")
            lib_file = os.path.join(temp_dir, 'lib' + dll_name + ".a")

            # 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 and to creating import libraries

            # dllwrap uses different options than gcc/ld
            if self.linker_dll == "dllwrap":
                extra_preargs.extend(["--output-lib", lib_file])
                # for dllwrap we have to use a special option
                extra_preargs.extend(["--def", def_file])
            # we use gcc/ld here and can be sure ld is >= 2.9.10
            else:
                # doesn't work: bfd_close build\...\libfoo.a: Invalid operation
                #extra_preargs.extend(["-Wl,--out-implib,%s" % lib_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 dllwrap/ld strip the output file
        # (On my machine: 10KB < stripped_file < ??100KB
        #   unstripped_file = stripped_file + XXX KB
        #  ( 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)

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

    def object_filenames(self, source_filenames, strip_dir=0, output_dir=''):
        """Adds supports for rc and res files."""
        if output_dir is None:
            output_dir = ''
        obj_names = []
        for src_name in source_filenames:
            # use normcase to make sure '.rc' is really '.rc' and not '.RC'
            base, ext = os.path.splitext(os.path.normcase(src_name))
            if ext not in (self.src_extensions + ['.rc','.res']):
                raise UnknownFileError("unknown file type '%s' (from '%s')" % \
                      (ext, src_name))
            if strip_dir:
                base = os.path.basename (base)
            if ext in ('.res', '.rc'):
                # these need to be compiled to object files
                obj_names.append (os.path.join(output_dir,
                                              base + ext + self.obj_extension))
            else:
                obj_names.append (os.path.join(output_dir,
                                               base + self.obj_extension))
        return obj_names

# 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):

        CygwinCCompiler.__init__ (self, verbose, dry_run, force)

        # ld_version >= "2.13" support -shared so use it instead of
        # -mdll -static
        if self.ld_version >= "2.13":
            shared_option = "-shared"
        else:
            shared_option = "-mdll -static"

        # A real mingw32 doesn't need to specify a different entry point,
        # but cygwin 2.91.57 in no-cygwin-mode needs it.
        if self.gcc_version <= "2.91.57":
            entry_point = '--entry _DllMain@12'
        else:
            entry_point = ''

        if is_cygwingcc():
            raise CCompilerError(
                'Cygwin gcc cannot be used with --compiler=mingw32')

        self.set_executables(compiler='gcc -O -Wall',
                             compiler_so='gcc -mdll -O -Wall',
                             compiler_cxx='g++ -O -Wall',
                             linker_exe='gcc',
                             linker_so='%s %s %s'
                                        % (self.linker_dll, shared_option,
                                           entry_point))
        # Maybe we should also append -mthreads, but then the finished
        # dlls need another dll (mingwm10.dll see Mingw32 docs)
        # (-mthreads: Support thread-safe exception handling on `Mingw32')

        # no additional libraries needed
        self.dll_libraries=[]

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

# 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'"

    # 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 '%s': %s" % (fn, exc.strerror))

RE_VERSION = re.compile(br'(\d+\.\d+(\.\d+)*)')

def _find_exe_version(cmd):
    """Find the version of an executable by running `cmd` in the shell.

    If the command is not found, or the output does not match
    `RE_VERSION`, returns None.
    """
    executable = cmd.split()[0]
    if find_executable(executable) is None:
        return None
    out = Popen(cmd, shell=True, stdout=PIPE).stdout
    try:
        out_string = out.read()
    finally:
        out.close()
    result = RE_VERSION.search(out_string)
    if result is None:
        return None
    # LooseVersion works with strings
    # so we need to decode our bytes
    return LooseVersion(result.group(1).decode())

def get_versions():
    """ Try to find out the versions of gcc, ld and dllwrap.

    If not possible it returns None for it.
    """
    commands = ['gcc -dumpversion', 'ld -v', 'dllwrap --version']
    return tuple([_find_exe_version(cmd) for cmd in commands])

def is_cygwingcc():
    '''Try to determine if the gcc that would be used is from cygwin.'''
    out_string = check_output(['gcc', '-dumpmachine'])
    return out_string.strip().endswith(b'cygwin')
Name	Size	Permission
__pycache__	---	0755
command	---	0755
README	295 bytes	0644
__init__.py	236 bytes	0644
_msvccompiler.py	21579 bytes	0644
archive_util.py	8518 bytes	0644
bcppcompiler.py	14935 bytes	0644
ccompiler.py	47415 bytes	0644
cmd.py	19129 bytes	0644
config.py	4880 bytes	0644
core.py	8876 bytes	0644
cygwinccompiler.py	16475 bytes	0644
debug.py	139 bytes	0644
dep_util.py	3491 bytes	0644
dir_util.py	7778 bytes	0644
dist.py	49690 bytes	0644
errors.py	3577 bytes	0644
extension.py	10515 bytes	0644
fancy_getopt.py	17784 bytes	0644
file_util.py	8148 bytes	0644
filelist.py	12832 bytes	0644
log.py	1969 bytes	0644
msvc9compiler.py	30612 bytes	0644
msvccompiler.py	23576 bytes	0644
spawn.py	7427 bytes	0644
sysconfig.py	20276 bytes	0644
text_file.py	12483 bytes	0644
unixccompiler.py	15016 bytes	0644
util.py	20789 bytes	0644
version.py	12345 bytes	0644
versionpredicate.py	5133 bytes	0644
File Content: cygwinccompiler.py

File Content: `cygwinccompiler.py`
