Prevent stripping of C interfaces in framework

webrtc/sdk/BUILD.gn

 # Copyright 2016 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("../build/webrtc.gni")
 if (is_mac) {
@@ skipping 234 matching lines @@
     "objc/Framework/Headers/WebRTC/RTCSSLAdapter.h",
     "objc/Framework/Headers/WebRTC/RTCSessionDescription.h",
     "objc/Framework/Headers/WebRTC/RTCTracing.h",
     "objc/Framework/Headers/WebRTC/RTCVideoFrame.h",
     "objc/Framework/Headers/WebRTC/RTCVideoRenderer.h",
     "objc/Framework/Headers/WebRTC/RTCVideoSource.h",
     "objc/Framework/Headers/WebRTC/RTCVideoTrack.h",
     "objc/Framework/Headers/WebRTC/UIDevice+RTCDevice.h",
     "objc/Framework/Headers/WebRTC/WebRTC.h",
   ]
+
+  # Slightly hacky, but we need to re-declare files here that are C

[tkchin_webrtc, 2016/10/19 00:26:26]

use -all_load like the ios framework?

+  # interfaces because otherwise they will be dead-stripped during
+  # linking (ObjC classes cannot be dead-stripped). We might consider
+  # just only using ObjC interfaces.
+  c_interfaces = [
+    "objc/Framework/Classes/RTCFieldTrials.mm",
+    "objc/Framework/Classes/RTCLogging.mm",
+    "objc/Framework/Classes/RTCMetrics.mm",
+    "objc/Framework/Classes/RTCSSLAdapter.mm",
+    "objc/Framework/Classes/RTCTracing.mm",
+  ]
   if (is_mac) {
     mac_framework_bundle("rtc_sdk_framework_objc") {
       info_plist = "objc/Framework/Info.plist"
       output_name = "WebRTC"
 
-      sources = common_objc_headers +
+      sources = common_objc_headers + c_interfaces +
                 [ "objc/Framework/Headers/WebRTC/RTCNSGLVideoView.h" ]
 
       if (!build_with_chromium) {
         sources += [ "objc/Framework/Headers/WebRTC/RTCFileLogger.h" ]
       }
 
       deps = [
         ":rtc_sdk_peerconnection_objc",
         "../system_wrappers:field_trial_default",
         "../system_wrappers:metrics_default",
@@ skipping 19 matching lines @@
         # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163)
         configs -= [ "//build/config/clang:find_bad_constructs" ]
       }
     }
   }
   if (is_ios) {
     ios_framework_bundle("rtc_sdk_framework_objc") {
       info_plist = "objc/Framework/Info.plist"
       output_name = "WebRTC"
 
-      sources = common_objc_headers
+      sources = common_objc_headers + c_interfaces
       public_headers = common_objc_headers
 
       if (!build_with_chromium) {
         sources += [ "objc/Framework/Headers/WebRTC/RTCFileLogger.h" ]
         public_headers += [ "objc/Framework/Headers/WebRTC/RTCFileLogger.h" ]
       }
 
       ldflags = [ "-all_load" ]
 
       deps = [
@@ skipping 27 matching lines @@
 
   rtc_static_library("rtc_sdk_objc") {
     complete_static_lib = true
     deps = [
       ":rtc_sdk_peerconnection_objc",
       "../system_wrappers:field_trial_default",
       "../system_wrappers:metrics_default",
     ]
   }
 }