def METHOD_NAME():
    # the sysconfigdata module name matches what's computed in stdlib's sysconfig.py
    import sys
    multiarch = getattr(sys.implementation, '_multiarch', '')
    name = f'_sysconfigdata_{sys.abiflags}_{sys.platform}_{multiarch}'
    sys.modules[name] = mod = type(sys)(name)
    no_default = object()
    def __getattr__(key, default=no_default):
        if key == "build_time_vars":
            return _get_posix_vars()
        elif default is no_default:
            raise AttributeError(key)
        else:
            return default
    mod.__getattr__ = __getattr__