text: 
  def cross_building(conanfile=None, skip_x64_x86=False):
      host_os = conanfile.settings.get_safe("os")
      host_arch = conanfile.settings.get_safe("arch")
      build_os = conanfile.settings_build.get_safe('os')
      build_arch = conanfile.settings_build.get_safe('arch')
  
      if skip_x64_x86 and host_os is not None and (build_os == host_os) and \
              host_arch is not None and ((build_arch == "x86_64") and (host_arch == "x86") or
                                         (build_arch == "sparcv9") and (host_arch == "sparc") or
                                         (build_arch == "ppc64") and (host_arch == "ppc32")):
          return False
  
      if host_os is not None and (build_os != host_os):
          return True
      if host_arch is not None and (build_arch != host_arch):
          return True
  
      return False
  
  