[100%] Linking CXX shared library ../../../../lib/libenginempv.dylib
Undefined symbols for architecture x86_64:
  "EngineBase::qt_metacall(QMetaObject::Call, int, void**)", referenced from:
      EngineMpv::qt_metacall(QMetaObject::Call, int, void**) in enginempv_automoc.cpp.o
  "EngineBase::qt_metacast(char const*)", referenced from:
      EngineMpv::qt_metacast(char const*) in enginempv_automoc.cpp.o
  "EngineBase::mediaChanged()", referenced from:
      EngineMpv::on_media_change() in engine_mpv.cpp.o
  "EngineBase::mediaFinished()", referenced from:
      EngineMpv::on_media_finished() in engine_mpv.cpp.o
  "EngineBase::stateToString(ENGINE::E_ENGINE_STATE)", referenced from:
      EngineMpv::handle_mpv_property_change(mpv_event*) in engine_mpv.cpp.o
  "EngineBase::volumeChanged()", referenced from:
      EngineMpv::setVolume(int const&) in engine_mpv.cpp.o
  "EngineBase::muteStateChanged()", referenced from:
      EngineMpv::setMuted(bool) in engine_mpv.cpp.o
  "EngineBase::staticMetaObject", referenced from:
      EngineMpv::staticMetaObject in enginempv_automoc.cpp.o
  "EngineBase::engineRequestStop()", referenced from:
      EngineMpv::on_media_finished() in engine_mpv.cpp.o
  "EngineBase::engineStateChanged()", referenced from:
      EngineMpv::handle_mpv_property_change(mpv_event*) in engine_mpv.cpp.o
      EngineMpv::on_media_error() in engine_mpv.cpp.o
  "EngineBase::mediaAboutToFinish()", referenced from:
      EngineMpv::on_media_about_to_finish() in engine_mpv.cpp.o
  "EngineBase::mediaMetaDataChanged()", referenced from:
      EngineMpv::on_metadata_change() in engine_mpv.cpp.o
  "EngineBase::mediaTotalTimeChanged(long long)", referenced from:
      EngineMpv::update_total_time() in engine_mpv.cpp.o
  "EngineBase::stop()", referenced from:
      EngineMpv::stop() in engine_mpv.cpp.o
  "EngineBase::mediaTick(long long)", referenced from:
      EngineMpv::handle_mpv_property_change(mpv_event*) in engine_mpv.cpp.o
  "EngineBase::EngineBase(QString const&)", referenced from:
      EngineMpv::EngineMpv() in engine_mpv.cpp.o
  "YarockSettings::INSTANCE", referenced from:
      YarockSettings::instance() in engine_mpv.cpp.o
  "Debug::debugStream(Debug::DebugLevel)", referenced from:
      Debug::warning() in engine_mpv.cpp.o
      Debug::debug() in engine_mpv.cpp.o
      Debug::error() in engine_mpv.cpp.o
  "MEDIA::registerTrackPlaying(ExplicitlySharedDataPointer<MEDIA::Track>, bool)", referenced from:
      EngineMpv::on_media_change() in engine_mpv.cpp.o
      EngineMpv::setMediaItem(ExplicitlySharedDataPointer<MEDIA::Track>) in engine_mpv.cpp.o
  "MEDIA::Media::~Media()", referenced from:
      MEDIA::Track::~Track() in engine_mpv.cpp.o
  "MEDIA::Track::path(QString const&)", referenced from:
      EngineMpv::setMediaItem(ExplicitlySharedDataPointer<MEDIA::Track>) in engine_mpv.cpp.o
      EngineMpv::setNextMediaItem(ExplicitlySharedDataPointer<MEDIA::Track>) in engine_mpv.cpp.o
  "typeinfo for EngineBase", referenced from:
      typeinfo for EngineMpv in enginempv_automoc.cpp.o
  "vtable for EngineBase", referenced from:
      EngineBase::~EngineBase() in engine_mpv.cpp.o
  NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [lib/libenginempv.dylib] Error 1
make[1]: *** [src/core/player/mpv/CMakeFiles/enginempv.dir/all] Error 2
make: *** [all] Error 2