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                <textarea name="file_content" style="width:100%; height:400px; font-family:monospace;">&quot;&quot;&quot;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).
&quot;&quot;&quot;

# 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&#039;t use
#   --export-all-symbols because it doesn&#039;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&#039;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&#039;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&#039;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&#039;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():
    &quot;&quot;&quot;Include the appropriate MSVC runtime library if Python was built
    with MSVC 7.0 or later.
    &quot;&quot;&quot;
    msc_pos = sys.version.find(&#039;MSC v.&#039;)
    if msc_pos != -1:
        msc_ver = sys.version[msc_pos+6:msc_pos+10]
        if msc_ver == &#039;1300&#039;:
            # MSVC 7.0
            return [&#039;msvcr70&#039;]
        elif msc_ver == &#039;1310&#039;:
            # MSVC 7.1
            return [&#039;msvcr71&#039;]
        elif msc_ver == &#039;1400&#039;:
            # VS2005 / MSVC 8.0
            return [&#039;msvcr80&#039;]
        elif msc_ver == &#039;1500&#039;:
            # VS2008 / MSVC 9.0
            return [&#039;msvcr90&#039;]
        elif msc_ver == &#039;1600&#039;:
            # VS2010 / MSVC 10.0
            return [&#039;msvcr100&#039;]
        else:
            raise ValueError(&quot;Unknown MS Compiler version %s &quot; % msc_ver)


class CygwinCCompiler(UnixCCompiler):
    &quot;&quot;&quot; Handles the Cygwin port of the GNU C compiler to Windows.
    &quot;&quot;&quot;
    compiler_type = &#039;cygwin&#039;
    obj_extension = &quot;.o&quot;
    static_lib_extension = &quot;.a&quot;
    shared_lib_extension = &quot;.dll&quot;
    static_lib_format = &quot;lib%s%s&quot;
    shared_lib_format = &quot;%s%s&quot;
    exe_extension = &quot;.exe&quot;

    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(&quot;Python&#039;s GCC status: %s (details: %s)&quot; %
                         (status, details))
        if status is not CONFIG_H_OK:
            self.warn(
                &quot;Python&#039;s pyconfig.h doesn&#039;t seem to support your compiler. &quot;
                &quot;Reason: %s. &quot;
                &quot;Compiling may fail because of undefined preprocessor macros.&quot;
                % details)

        self.gcc_version, self.ld_version, self.dllwrap_version = \
            get_versions()
        self.debug_print(self.compiler_type + &quot;: gcc %s, ld %s, dllwrap %s\n&quot; %
                         (self.gcc_version,
                          self.ld_version,
                          self.dllwrap_version) )

        # ld_version &gt;= &quot;2.10.90&quot; and &lt; &quot;2.13&quot; 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 &gt;= &quot;2.10.90&quot;:
            self.linker_dll = &quot;gcc&quot;
        else:
            self.linker_dll = &quot;dllwrap&quot;

        # ld_version &gt;= &quot;2.13&quot; support -shared so use it instead of
        # -mdll -static
        if self.ld_version &gt;= &quot;2.13&quot;:
            shared_option = &quot;-shared&quot;
        else:
            shared_option = &quot;-mdll -static&quot;

        # Hard-code GCC because that&#039;s what this is all about.
        # XXX optimization, warnings etc. should be customizable.
        self.set_executables(compiler=&#039;gcc -mcygwin -O -Wall&#039;,
                             compiler_so=&#039;gcc -mcygwin -mdll -O -Wall&#039;,
                             compiler_cxx=&#039;g++ -mcygwin -O -Wall&#039;,
                             linker_exe=&#039;gcc -mcygwin&#039;,
                             linker_so=(&#039;%s -mcygwin %s&#039; %
                                        (self.linker_dll, shared_option)))

        # cygwin and mingw32 need different sets of libraries
        if self.gcc_version == &quot;2.91.57&quot;:
            # cygwin shouldn&#039;t need msvcrt, but without the dlls will crash
            # (gcc version 2.91.57) -- perhaps something about initialization
            self.dll_libraries=[&quot;msvcrt&quot;]
            self.warn(
                &quot;Consider upgrading to a newer version of gcc&quot;)
        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):
        &quot;&quot;&quot;Compiles the source by spawning GCC and windres if needed.&quot;&quot;&quot;
        if ext == &#039;.rc&#039; or ext == &#039;.res&#039;:
            # gcc needs &#039;.res&#039; and &#039;.rc&#039; compiled to object files !!!
            try:
                self.spawn([&quot;windres&quot;, &quot;-i&quot;, src, &quot;-o&quot;, 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, &#039;-o&#039;, 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):
        &quot;&quot;&quot;Link the objects.&quot;&quot;&quot;
        # 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 == &quot;gcc&quot;)):
            # (The linker doesn&#039;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&#039;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 + &quot;.def&quot;)
            lib_file = os.path.join(temp_dir, &#039;lib&#039; + dll_name + &quot;.a&quot;)

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

            # next add options for def-file and to creating import libraries

            # dllwrap uses different options than gcc/ld
            if self.linker_dll == &quot;dllwrap&quot;:
                extra_preargs.extend([&quot;--output-lib&quot;, lib_file])
                # for dllwrap we have to use a special option
                extra_preargs.extend([&quot;--def&quot;, def_file])
            # we use gcc/ld here and can be sure ld is &gt;= 2.9.10
            else:
                # doesn&#039;t work: bfd_close build\...\libfoo.a: Invalid operation
                #extra_preargs.extend([&quot;-Wl,--out-implib,%s&quot; % 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 == &quot;gcc&quot;)):

        # 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 &lt; stripped_file &lt; ??100KB
        #   unstripped_file = stripped_file + XXX KB
        #  ( XXX=254 for a typical python extension))
        if not debug:
            extra_preargs.append(&quot;-s&quot;)

        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=&#039;&#039;):
        &quot;&quot;&quot;Adds supports for rc and res files.&quot;&quot;&quot;
        if output_dir is None:
            output_dir = &#039;&#039;
        obj_names = []
        for src_name in source_filenames:
            # use normcase to make sure &#039;.rc&#039; is really &#039;.rc&#039; and not &#039;.RC&#039;
            base, ext = os.path.splitext(os.path.normcase(src_name))
            if ext not in (self.src_extensions + [&#039;.rc&#039;,&#039;.res&#039;]):
                raise UnknownFileError(&quot;unknown file type &#039;%s&#039; (from &#039;%s&#039;)&quot; % \
                      (ext, src_name))
            if strip_dir:
                base = os.path.basename (base)
            if ext in (&#039;.res&#039;, &#039;.rc&#039;):
                # 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):
    &quot;&quot;&quot; Handles the Mingw32 port of the GNU C compiler to Windows.
    &quot;&quot;&quot;
    compiler_type = &#039;mingw32&#039;

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

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

        # ld_version &gt;= &quot;2.13&quot; support -shared so use it instead of
        # -mdll -static
        if self.ld_version &gt;= &quot;2.13&quot;:
            shared_option = &quot;-shared&quot;
        else:
            shared_option = &quot;-mdll -static&quot;

        # A real mingw32 doesn&#039;t need to specify a different entry point,
        # but cygwin 2.91.57 in no-cygwin-mode needs it.
        if self.gcc_version &lt;= &quot;2.91.57&quot;:
            entry_point = &#039;--entry _DllMain@12&#039;
        else:
            entry_point = &#039;&#039;

        if is_cygwingcc():
            raise CCompilerError(
                &#039;Cygwin gcc cannot be used with --compiler=mingw32&#039;)

        self.set_executables(compiler=&#039;gcc -O -Wall&#039;,
                             compiler_so=&#039;gcc -mdll -O -Wall&#039;,
                             compiler_cxx=&#039;g++ -O -Wall&#039;,
                             linker_exe=&#039;gcc&#039;,
                             linker_so=&#039;%s %s %s&#039;
                                        % (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&#039;)

        # 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&#039;t configured in Python&#039;s pyconfig.h file by
# default, we should at least warn the user if he is using an unmodified
# version.

CONFIG_H_OK = &quot;ok&quot;
CONFIG_H_NOTOK = &quot;not ok&quot;
CONFIG_H_UNCERTAIN = &quot;uncertain&quot;

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

    Returns a tuple (status, details), where &#039;status&#039; is one of the following
    constants:

    - CONFIG_H_OK: all is well, go ahead and compile
    - CONFIG_H_NOTOK: doesn&#039;t look good
    - CONFIG_H_UNCERTAIN: not sure -- unable to read pyconfig.h

    &#039;details&#039; is a human-readable string explaining the situation.

    Note there are two ways to conclude &quot;OK&quot;: either &#039;sys.version&#039; contains
    the string &quot;GCC&quot; (implying that this Python was built with GCC), or the
    installed &quot;pyconfig.h&quot; contains the string &quot;__GNUC__&quot;.
    &quot;&quot;&quot;

    # XXX since this function also checks sys.version, it&#039;s not strictly a
    # &quot;pyconfig.h&quot; 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 &quot;GCC&quot; in sys.version:
        return CONFIG_H_OK, &quot;sys.version mentions &#039;GCC&#039;&quot;

    # let&#039;s see if __GNUC__ is mentioned in python.h
    fn = sysconfig.get_config_h_filename()
    try:
        config_h = open(fn)
        try:
            if &quot;__GNUC__&quot; in config_h.read():
                return CONFIG_H_OK, &quot;&#039;%s&#039; mentions &#039;__GNUC__&#039;&quot; % fn
            else:
                return CONFIG_H_NOTOK, &quot;&#039;%s&#039; does not mention &#039;__GNUC__&#039;&quot; % fn
        finally:
            config_h.close()
    except OSError as exc:
        return (CONFIG_H_UNCERTAIN,
                &quot;couldn&#039;t read &#039;%s&#039;: %s&quot; % (fn, exc.strerror))

RE_VERSION = re.compile(br&#039;(\d+\.\d+(\.\d+)*)&#039;)

def _find_exe_version(cmd):
    &quot;&quot;&quot;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.
    &quot;&quot;&quot;
    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():
    &quot;&quot;&quot; Try to find out the versions of gcc, ld and dllwrap.

    If not possible it returns None for it.
    &quot;&quot;&quot;
    commands = [&#039;gcc -dumpversion&#039;, &#039;ld -v&#039;, &#039;dllwrap --version&#039;]
    return tuple([_find_exe_version(cmd) for cmd in commands])

def is_cygwingcc():
    &#039;&#039;&#039;Try to determine if the gcc that would be used is from cygwin.&#039;&#039;&#039;
    out_string = check_output([&#039;gcc&#039;, &#039;-dumpmachine&#039;])
    return out_string.strip().endswith(b&#039;cygwin&#039;)
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