build a static lib for ios/macos . include all sdk/objc classes.

[YangJie09]

if you do:
gn gen out/ios --args='target_os="ios"
target_environment="device"
target_cpu="arm64"
rtc_enable_symbol_export=true
rtc_enable_objc_symbol_export=true
is_component_build=false
is_debug=false
enable_dsyms=true
rtc_include_tests=false
ios_enable_code_signing=false
proprietary_codecs=true
rtc_use_h264=true
use_custom_libcxx=false
ios_deployment_target="13.0"'

ninja -C out/ios webrtc

The result libwebrtc.a is not include sdk/objc symbols. you need to modify src->build.gn file:
then find: rtc_static_library("webrtc") , in the deps , add the following options:

  "api/video_codecs:builtin_video_decoder_factory",
  "api/video_codecs:builtin_video_encoder_factory",
  "sdk:audio_device",
  "sdk:audio_device_api_objc",
  "sdk:audio_device_objc",
  "sdk:audio_objc",
  "sdk:audio_session_delegate_adapter_objc",
  "sdk:audio_session_objc",
  "sdk:base_native_additions_objc",
  "sdk:base_objc",
  "sdk:callback_logger_objc",
  "sdk:common_objc",
  "sdk:dav1d_decoder",
  "sdk:default_codec_factory_objc",
  "sdk:file_logger_objc",
  "sdk:helpers_objc",
  "sdk:libaom_av1_encoder",
  "sdk:metal_objc",
  "sdk:native_api",
  "sdk:native_api_audio_device_module",
  "sdk:native_network_monitor",
  "sdk:native_video",
  "sdk:network_monitor_objc",
  "sdk:objc_audio_device_module",
  "sdk:opengl_objc",
  "sdk:opengl_ui_objc",
  "sdk:peerconnectionfactory_base_objc",
  "sdk:videocapture_objc",
  "sdk:videocapturebase_objc",
  "sdk:videocodec_objc",
  "sdk:videoframebuffer_objc",
  "sdk:videorenderer_objc",
  "sdk:videorendereradapter_objc",
  "sdk:videosource_objc",
  "sdk:videotoolbox_objc",
  "sdk:vp8",
  "sdk:vp9",
  "sdk:vpx_codec_constants",
  "sdk:wrapped_native_codec_objc",

rebuild it. you can got a complete libwebrtc.a