Undefined symbols for architecture x86_64 - Linker error when building webrtc Qt for Mac

[Denys Yamkovyi]

I’m trying to make a build for Mac desktiop in Qt Creator using WebRTC native library but always see the error message:

Undefined symbols for architecture x86_64:
  "_NSOSStatusErrorDomain", referenced from:
      rtc::DescriptionFromOSStatus(int) in libwebrtc.a(logging_mac.o)
  "_OBJC_CLASS_$_NSError", referenced from:
      objc-class-ref in libwebrtc.a(logging_mac.o)
  "_OBJC_CLASS_$_NSObject", referenced from:
      objc-class-ref in libwebrtc.a(thread_darwin.o)
  "_OBJC_CLASS_$_NSThread", referenced from:
      objc-class-ref in libwebrtc.a(thread_darwin.o)
  "_objc_autoreleasePoolPop", referenced from:
      (anonymous namespace)::InitCocoaMultiThreading() in libwebrtc.a(thread_darwin.o)
      rtc::Thread::PreRun(void*) in libwebrtc.a(thread_darwin.o)
      rtc::Thread::ProcessMessages(int) in libwebrtc.a(thread_darwin.o)  …. 
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [lib*******_WebRTCWrapper.1.0.0.dylib] Error 1
12:17:39: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project (kit: Desktop Qt 5.10.0 clang 64bit)
When executing step "Make"

I’m trying to make a build for Mac desktiop in Qt Creator using WebRTC native library but always see the error message: Undefined symbols for architecture x86_64: "_NSOSStatusErrorDomain", referenced from: rtc::DescriptionFromOSStatus(int) in libwebrtc.a(logging_mac.o) "_OBJC_CLASS_$_NSError", referenced from: objc-class-ref in libwebrtc.a(logging_mac.o) "_OBJC_CLASS_$_NSObject", referenced from: objc-class-ref in libwebrtc.a(thread_darwin.o) "_OBJC_CLASS_$_NSThread", referenced from: objc-class-ref in libwebrtc.a(thread_darwin.o) "_objc_autoreleasePoolPop", referenced from: (anonymous namespace)::InitCocoaMultiThreading() in libwebrtc.a(thread_darwin.o) rtc::Thread::PreRun(void*) in libwebrtc.a(thread_darwin.o) rtc::Thread::ProcessMessages(int) in libwebrtc.a(thread_darwin.o) …. ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) make: *** [lib*******_WebRTCWrapper.1.0.0.dylib] Error 1 12:17:39: The process "/usr/bin/make" exited with code 2. Error while building/deploying project (kit: Desktop Qt 5.10.0 clang 64bit) When executing step "Make" Initial parameters: Qt Creator Based on Qt 5.10.0 (Clang 7.0 (Apple), 64 bit) Compiler - Clang (C++ x86 64 bit) in c++11 mode against libc++ MacOS - Sierra v.10.12.6 Xcode - Version 9.2 (9C40b) WebRTC - branch-heads/63 After playing with compilation options of webrtc, I have compiled with system's clang and using libc++. I have builded the webRTC library with parameters: gn gen out/x64/Debug --args='is_debug=true target_os="mac" is_component_build=false rtc_include_tests=false target_cpu="x64”’ export GYP_DEFINES="build_with_libjingle=1 build_with_chromium=0 libjingle_objc=1 clang=1 clang_xcode=1 use_system_libcxx=1 OS=mac" export GYP_GENERATORS="ninja, xcode-ninja" export GYP_DEFINES="$GYP_DEFINES OS=mac target_arch=x64" export GYP_GENERATOR_FLAGS="$GYP_GENERATOR_FLAGS output_dir=out/x64/Debug” ninja -v -C out/x64/Debug Moreover after extensive googling I have edited common.gypi file in /src/build/ 'xcode_settings': { 'GCC_DYNAMIC_NO_PIC': 'NO', # No -mdynamic-no-pic # (Equivalent to -fPIC) 'CLANG_CXX_LIBRARY': 'libc++', # MACOSX_DEPLOYMENT_TARGET maps to -mmacosx-version-min } 'GCC_ENABLE_CPP_RTTI': 'YES',             # -fno-rtti 'GCC_TREAT_WARNINGS_AS_ERRORS': 'NO',     # -Werror 'CLANG_CXX_LIBRARY':           'libc++', # -stdlib=libc++  But unfortunately, the results error is the same!!!