Undefined symbols:_OBJC_CLASS_$_RTCEAGLVideoView

[Tony-Day]

m125_release_ios_sdk, when using RTCEAGLVideoView in engineering, it will prompt: Undefined symbols:OBJC_CLASS$_RTCEAGLVideoView.
RTCEAGLVideoView *view = [[RTCEAGLVideoView alloc] init];