I'm integrating Google Maps SDK in my existing webrtc xcode project. It requires to add -ObjC linker flag, so i get a lot of duplicate error:
duplicate symbol _OBJC_CLASS_$_ARDAppClient in:
/Users/phuongle/Library/Developer/Xcode/DerivedData/Build/Intermediates/AppRTCDemo.build/Debug-iphoneos/AppRTCDemo.build/Objects-normal/armv7/ARDAppClient.o
AppRTCDemo/WebRTC/libWebRTC-armv7.a(apprtc_signaling.ARDAppClient.o)
...
duplicate symbol _OBJC_CLASS_$_ARDAppEngineClient in:
/Users/phuongle/Library/Developer/Xcode/DerivedData/Build/Intermediates/AppRTCDemo.build/Debug-iphoneos/AppRTCDemo.build/Objects-normal/armv7/ARDAppEngineClient.o
AppRTCDemo/WebRTC/libWebRTC-armv7.a(apprtc_signaling.ARDAppEngineClient.o)
...
duplicate symbol _OBJC_CLASS_$_ARDCEODTURNClient in:
/Users/phuongle/Library/Developer/Xcode/DerivedData/Build/Intermediates/AppRTCDemo.build/Debug-iphoneos/AppRTCDemo.build/Objects-normal/armv7/ARDCEODTURNClient.o
AppRTCDemo/WebRTC/libWebRTC-armv7.a(apprtc_signaling.ARDCEODTURNClient.o)
...
duplicate symbol _SRWebSocketErrorDomain in:
/Users/phuongle/Library/Developer/Xcode/DerivedData/Build/Intermediates/AppRTCDemo.build/Debug-iphoneos/AppRTCDemo.build/Objects-normal/armv7/SRWebSocket.o
AppRTCDemo/WebRTC/libWebRTC-armv7.a(socketrocket.SRWebSocket.o)
ld: 114 duplicate symbols for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I can build without error if i remove -ObjC linker flag. Many thanks for your advice
