Prevent stripping of C interfaces in framework

webrtc/sdk/BUILD.gn

Index: webrtc/sdk/BUILD.gn
diff --git a/webrtc/sdk/BUILD.gn b/webrtc/sdk/BUILD.gn
index 755390c38c2e0a935513c3096dbe9ebd5a0a9d65..7b2072698d83949395e77ed6cc5c2a6baeccafbe 100644
--- a/webrtc/sdk/BUILD.gn
+++ b/webrtc/sdk/BUILD.gn
@@ -252,12 +252,24 @@ if (is_ios || (is_mac && mac_deployment_target == "10.7")) {
     "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) {
@@ -297,7 +309,7 @@ if (is_ios || (is_mac && mac_deployment_target == "10.7")) {
       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) {