def get_libraries(self):
        opt = []
        d = self.get_libgcc_dir()
        if d is not None:
            g2c = self.g2c + '-pic'
            f = self.static_lib_format % (g2c, self.static_lib_extension)
            if not os.path.isfile(os.path.join(d,f)):
                g2c = self.g2c
        else:
            g2c = self.g2c

        if g2c is not None:
            opt.append(g2c)
        c_compiler = self.c_compiler
        if sys.platform == 'win32' and c_compiler and \
               c_compiler.compiler_type=='msvc':
            # the following code is not needed (read: breaks) when using MinGW
            # in case want to link F77 compiled code with MSVC
            opt.append('gcc')
            runtime_lib = msvc_runtime_library()
            if runtime_lib:
                opt.append(runtime_lib)
        if sys.platform == 'darwin':
            opt.append('cc_dynamic')
        return opt

def build_msvcr_library(debug=False):
    if os.name != 'nt':
        return False

    # If the version number is None, then we couldn't find the MSVC runtime at
    # all, because we are running on a Python distribution which is customed
    # compiled; trust that the compiler is the same as the one available to us
    # now, and that it is capable of linking with the correct runtime without
    # any extra options.
    msvcr_ver = msvc_runtime_major()
    if msvcr_ver is None:
        log.debug('Skip building import library: '
                  'Runtime is not compiled with MSVC')
        return False

    # Skip using a custom library for versions < MSVC 8.0
    if msvcr_ver < 80:
        log.debug('Skip building msvcr library:'
                  ' custom functionality not present')
        return False

    msvcr_name = msvc_runtime_library()
    if debug:
        msvcr_name += 'd'

    # Skip if custom library already exists
    out_name = "lib%s.a" % msvcr_name
    out_file = os.path.join(sys.prefix, 'libs', out_name)
    if os.path.isfile(out_file):
        log.debug('Skip building msvcr library: "%s" exists' %
                  (out_file,))
        return True

    # Find the msvcr dll
    msvcr_dll_name = msvcr_name + '.dll'
    dll_file = find_dll(msvcr_dll_name)
    if not dll_file:
        log.warn('Cannot build msvcr library: "%s" not found' %
                 msvcr_dll_name)
        return False

    def_name = "lib%s.def" % msvcr_name
    def_file = os.path.join(sys.prefix, 'libs', def_name)

    log.info('Building msvcr library: "%s" (from %s)' \
             % (out_file, dll_file))

    # Generate a symbol definition file from the msvcr dll
    generate_def(dll_file, def_file)

    # Create a custom mingw library for the given symbol definitions
    cmd = ['dlltool', '-d', def_file, '-l', out_file]
    retcode = subprocess.call(cmd)

    # Clean up symbol definitions
    os.remove(def_file)

    return (not retcode)

def check_embedded_msvcr_match_linked(msver):
    """msver is the ms runtime version used for the MANIFEST."""
    # check msvcr major version are the same for linking and
    # embedding
    msvcv = msvc_runtime_library()
    if msvcv:
        maj = int(msvcv[5:6])
        if not maj == int(msver):
            raise ValueError(
                "Discrepancy between linked msvcr " "(%d) and the one about to be embedded " "(%d)" % (int(msver), maj)
            )

def build_msvcr_library(debug=False):
    if os.name != 'nt':
        return False

    msvcr_name = msvc_runtime_library()

    # Skip using a custom library for versions < MSVC 8.0
    msvcr_ver = msvc_runtime_major()
    if msvcr_ver and msvcr_ver < 80:
        log.debug('Skip building msvcr library:'
                  ' custom functionality not present')
        return False

    if debug:
        msvcr_name += 'd'

    # Skip if custom library already exists
    out_name = "lib%s.a" % msvcr_name
    out_file = os.path.join(sys.prefix, 'libs', out_name)
    if os.path.isfile(out_file):
        log.debug('Skip building msvcr library: "%s" exists' %
                  (out_file,))
        return True

    # Find the msvcr dll
    msvcr_dll_name = msvcr_name + '.dll'
    dll_file = find_dll(msvcr_dll_name)
    if not dll_file:
        log.warn('Cannot build msvcr library: "%s" not found' %
                 msvcr_dll_name)
        return False

    def_name = "lib%s.def" % msvcr_name
    def_file = os.path.join(sys.prefix, 'libs', def_name)

    log.info('Building msvcr library: "%s" (from %s)' \
             % (out_file, dll_file))

    # Generate a symbol definition file from the msvcr dll
    generate_def(dll_file, def_file)

    # Create a custom mingw library for the given symbol definitions
    cmd = ['dlltool', '-d', def_file, '-l', out_file]
    retcode = subprocess.call(cmd)

    # Clean up symbol definitions
    os.remove(def_file)

    return (not retcode)

def check_embedded_msvcr_match_linked(msver):
    """msver is the ms runtime version used for the MANIFEST."""
    # check msvcr major version are the same for linking and
    # embedding
    msvcv = msvc_runtime_library()
    if msvcv:
        assert msvcv.startswith("msvcr"), msvcv
        # Dealing with something like "mscvr90" or "mscvr100", the last
        # last digit is the minor release, want int("9") or int("10"):
        maj = int(msvcv[5:-1])
        if not maj == int(msver):
            raise ValueError(
                  "Discrepancy between linked msvcr " \
                  "(%d) and the one about to be embedded " \
                  "(%d)" % (int(msver), maj))

 def link(
     self,
     target_desc,
     objects,
     output_filename,
     output_dir,
     libraries,
     library_dirs,
     runtime_library_dirs,
     export_symbols=None,
     debug=0,
     extra_preargs=None,
     extra_postargs=None,
     build_temp=None,
     target_lang=None,
 ):
     # Include the appropiate MSVC runtime library if Python was built
     # with MSVC >= 7.0 (MinGW standard is msvcrt)
     runtime_library = msvc_runtime_library()
     if runtime_library:
         if not libraries:
             libraries = []
         libraries.append(runtime_library)
     args = (
         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,
     )
     if self.gcc_version < "3.0.0":
         func = distutils.cygwinccompiler.CygwinCCompiler.link
     else:
         func = UnixCCompiler.link
     func(*args[: func.im_func.func_code.co_argcount])
     return

    def get_libraries(self):
        opt = []
        d = self.get_libgcc_dir()
        if d is not None:
            g2c = self.g2c + '-pic'
            f = self.static_lib_format % (g2c, self.static_lib_extension)
            if not os.path.isfile(os.path.join(d,f)):
                g2c = self.g2c
        else:
            g2c = self.g2c

        if g2c is not None:
            opt.append(g2c)
        if sys.platform == 'win32':
            # in case want to link F77 compiled code with MSVC
            opt.append('gcc')
            runtime_lib = msvc_runtime_library()
            if runtime_lib:
                opt.append(runtime_lib)
        if sys.platform == 'darwin':
            opt.append('cc_dynamic')
        return opt

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

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

        # we need to support 3.2 which doesn't match the standard
        # get_versions methods regex
        if self.gcc_version is None:
            import re
            p = subprocess.Popen(['gcc', '-dumpversion'], shell=True,
                                 stdout=subprocess.PIPE)
            out_string = p.stdout.read()
            p.stdout.close()
            result = re.search('(\d+\.\d+)', out_string)
            if result:
                self.gcc_version = StrictVersion(result.group(1))

        # 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 [email protected]'
        else:
            entry_point = ''

        if self.linker_dll == 'dllwrap':
            # Commented out '--driver-name g++' part that fixes weird
            #   g++.exe: g++: No such file or directory
            # error (mingw 1.0 in Enthon24 tree, gcc-3.4.5).
            # If the --driver-name part is required for some environment
            # then make the inclusion of this part specific to that
            # environment.
            self.linker = 'dllwrap' #  --driver-name g++'
        elif self.linker_dll == 'gcc':
            self.linker = 'g++'

        # **changes: eric jones 4/11/01
        # 1. Check for import library on Windows.  Build if it doesn't exist.

        build_import_library()

        # Check for custom msvc runtime library on Windows. Build if it doesn't exist.
        msvcr_success = build_msvcr_library()
        msvcr_dbg_success = build_msvcr_library(debug=True)
        if msvcr_success or msvcr_dbg_success:
            # add preprocessor statement for using customized msvcr lib
            self.define_macro('NPY_MINGW_USE_CUSTOM_MSVCR')

        # Define the MSVC version as hint for MinGW
        msvcr_version = '0x%03i0' % int(msvc_runtime_library().lstrip('msvcr'))
        self.define_macro('__MSVCRT_VERSION__', msvcr_version)

        # MS_WIN64 should be defined when building for amd64 on windows,
        # but python headers define it only for MS compilers, which has all
        # kind of bad consequences, like using Py_ModuleInit4 instead of
        # Py_ModuleInit4_64, etc... So we add it here
        if get_build_architecture() == 'AMD64':
            if self.gcc_version < "4.0":
                self.set_executables(
                    compiler='gcc -g -DDEBUG -DMS_WIN64 -mno-cygwin -O0 -Wall',
                    compiler_so='gcc -g -DDEBUG -DMS_WIN64 -mno-cygwin -O0'
                                ' -Wall -Wstrict-prototypes',
                    linker_exe='gcc -g -mno-cygwin',
                    linker_so='gcc -g -mno-cygwin -shared')
            else:
                # gcc-4 series releases do not support -mno-cygwin option
                self.set_executables(
                    compiler='gcc -g -DDEBUG -DMS_WIN64 -O0 -Wall',
                    compiler_so='gcc -g -DDEBUG -DMS_WIN64 -O0 -Wall -Wstrict-prototypes',
                    linker_exe='gcc -g',
                    linker_so='gcc -g -shared')
        else:
            if self.gcc_version <= "3.0.0":
                self.set_executables(
                    compiler='gcc -mno-cygwin -O2 -w',
                    compiler_so='gcc -mno-cygwin -mdll -O2 -w'
                                ' -Wstrict-prototypes',
                    linker_exe='g++ -mno-cygwin',
                    linker_so='%s -mno-cygwin -mdll -static %s' %
                              (self.linker, entry_point))
            elif self.gcc_version < "4.0":
                self.set_executables(
                    compiler='gcc -mno-cygwin -O2 -Wall',
                    compiler_so='gcc -mno-cygwin -O2 -Wall'
                                ' -Wstrict-prototypes',
                    linker_exe='g++ -mno-cygwin',
                    linker_so='g++ -mno-cygwin -shared')
            else:
                # gcc-4 series releases do not support -mno-cygwin option
                self.set_executables(compiler='gcc -O2 -Wall',
                                     compiler_so='gcc -O2 -Wall -Wstrict-prototypes',
                                     linker_exe='g++ ',
                                     linker_so='g++ -shared')
        # added for python2.3 support
        # we can't pass it through set_executables because pre 2.2 would fail
        self.compiler_cxx = ['g++']

        # Maybe we should also append -mthreads, but then the finished dlls
#.........这里部分代码省略.........

def get_msvcr_replacement():
    """Replacement for outdated version of get_msvcr from cygwinccompiler"""
    msvcr = msvc_runtime_library()
    return [] if msvcr is None else [msvcr]