Patch functions in distutils to use standalone Microsoft Visual C++
    compilers.

def patch_for_msvc_specialized_compiler():
    """
    Patch functions in distutils to use standalone Microsoft Visual C++
    compilers.
    """
    # import late to avoid circular imports on Python < 3.5
    msvc = import_module('setuptools.msvc')

    if platform.system() != 'Windows':
        # Compilers only availables on Microsoft Windows
        return

    def patch_params(mod_name, func_name):
        """
        Prepare the parameters for patch_func to patch indicated function.
        """
        repl_prefix = 'msvc9_' if 'msvc9' in mod_name else 'msvc14_'
        repl_name = repl_prefix + func_name.lstrip('_')
        repl = getattr(msvc, repl_name)
        mod = import_module(mod_name)
        if not hasattr(mod, func_name):
            raise ImportError(func_name)
        return repl, mod, func_name

    # Python 2.7 to 3.4
    msvc9 = functools.partial(patch_params, 'distutils.msvc9compiler')

    # Python 3.5+
    msvc14 = functools.partial(patch_params, 'distutils._msvccompiler')

    try:
        # Patch distutils.msvc9compiler
        patch_func(*msvc9('find_vcvarsall'))
        patch_func(*msvc9('query_vcvarsall'))
    except ImportError:
        pass

    try:
        # Patch distutils._msvccompiler._get_vc_env
        patch_func(*msvc14('_get_vc_env'))
    except ImportError:
        pass

    try:
        # Patch distutils._msvccompiler.gen_lib_options for Numpy
        patch_func(*msvc14('gen_lib_options'))
    except ImportError:
        pass