link errors after building for macOS

[Taylor Holliday]

Hello :)

We've managed to build successfully for iOS, but getting some link errors on macOS when linking our app, for symbols I think should be available (i.e. not iOS-only API):

Undefined symbol: _OBJC_CLASS_$_RTCAudioTrack
Undefined symbol: _OBJC_CLASS_$_RTCCallbackLogger
Undefined symbol: _OBJC_CLASS_$_RTCCameraVideoCapturer
Undefined symbol: _OBJC_CLASS_$_RTCConfiguration
Undefined symbol: _OBJC_CLASS_$_RTCDataBuffer
Undefined symbol: _OBJC_CLASS_$_RTCDataChannel
Undefined symbol: _OBJC_CLASS_$_RTCDataChannelConfiguration
Undefined symbol: _OBJC_CLASS_$_RTCDefaultVideoDecoderFactory
Undefined symbol: _OBJC_CLASS_$_RTCDefaultVideoEncoderFactory
Undefined symbol: _OBJC_CLASS_$_RTCIceCandidate
Undefined symbol: _OBJC_CLASS_$_RTCIceServer
Undefined symbol: _OBJC_CLASS_$_RTCMTLNSVideoView
Undefined symbol: _OBJC_CLASS_$_RTCMediaConstraints
Undefined symbol: _OBJC_CLASS_$_RTCPeerConnection
Undefined symbol: _OBJC_CLASS_$_RTCPeerConnectionFactory
Undefined symbol: _OBJC_CLASS_$_RTCSessionDescription
Undefined symbol: _OBJC_CLASS_$_RTCStatistics
Undefined symbol: _OBJC_CLASS_$_RTCStatisticsReport
Undefined symbol: _OBJC_CLASS_$_RTCVideoCapturer
Undefined symbol: _OBJC_CLASS_$_RTCVideoTrack
Undefined symbol: _RTCInitializeSSL
Undefined symbol: _RTCSetMinDebugLogLevel
Undefined symbol: _kRTCMediaConstraintsOfferToReceiveAudio
Undefined symbol: _kRTCMediaConstraintsOfferToReceiveVideo
Undefined symbol: _kRTCMediaConstraintsValueFalse
Undefined symbol: _kRTCMediaConstraintsValueTrue

Linker command failed with exit code 1 (use -v to see invocation)

Here's what I'm using to build:

gn gen out/mac_x64 --args='target_os="mac" target_cpu="x64" is_component_build=false is_debug=false enable_stripping=true'
ninja -C out/mac_x64 mac_framework_objc

gn gen out/mac_arm64 --args='target_os="mac" target_cpu="arm64" is_component_build=false is_debug=false enable_stripping=true'
ninja -C out/mac_arm64 mac_framework_objc

Any help greatly appreciated!

Thanks!

[Anthony]

I'm also facing this issue and would greatly appreciate any help resolving it.

[Anthony]

This is still a problem in M126 and has been preventing me from using any version after M116 on macOS. Could someone who is knowledgeable about the build process please help resolve these "Undefined symbol" errors?

[Khun V]

Are you linking against WebRTC.framework? That's where RTC objc thingies usually live (I'm still on 115 though). That's what I get:

nm webrtc/src/out/WebRTC.framework/Versions/A/WebRTC | grep RTCAudioTrack

000000000018e18c t -[RTCAudioTrack .cxx_destruct]

000000000018dd48 t -[RTCAudioTrack initWithFactory:nativeTrack:type:]

000000000018dae4 t -[RTCAudioTrack initWithFactory:source:trackId:]

000000000018e10c t -[RTCAudioTrack nativeAudioTrack]

000000000018df7c t -[RTCAudioTrack source]

0000000000a194d8 S _OBJC_CLASS_$_RTCAudioTrack

0000000000a1aa6c s _OBJC_IVAR_$_RTCAudioTrack._source

0000000000a19500 S _OBJC_METACLASS_$_RTCAudioTrack

...

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