code: def cross_dir(self, forcex86=False):
          r
          current = 'x86' if forcex86 else self.current_cpu
          return (
              '' if self.target_cpu == current else
              self.target_dir().replace('\\', '\\%s_' % current)
          )
docs: r"""
          Cross platform specific subfolder.
  
          Parameters
          ----------
          forcex86: bool
              Use 'x86' as current architecture even if current acritecture is
              not x86.
  
          Return
          ------
          subfolder: str
              '' if target architecture is current architecture,
              '\current_target' if not.