如何为 ios 构建 webRTC 框架

问：

我想构建 WebRTC 框架。但我有一些问题。

谷歌提供了这方面的指南。https://webrtc.github.io/webrtc-org/native-code/ios/

这是我的代码

# debug build for simulator
gn gen out/ios_sim --args='target_os="ios" target_cpu="x64"'

但它失败了，并给出了以下评论。

ERROR at //webrtc.gni:486:32: Assignment had no effect.
        xctest_module_target = "//base/test:google_test_runner"
                               ^-------------------------------
You set the variable "xctest_module_target" here and it was unused before it went
out of scope.
See //testing/test.gni:451:5: whence it was called.
    target(ios_test_target_type, _test_target) {
    ^-------------------------------------------
See //webrtc.gni:443:3: whence it was called.
  test(target_name) {
  ^------------------
See //BUILD.gn:536:3: whence it was called.
  rtc_test("rtc_unittests") {
  ^--------------------------

我找不到有关此错误的任何信息。 谁能帮我解决这个问题？