Undefined symbols for architecture arm64 in cocos 2d-x 3.10 project

@FelixFox wrote:

Hello,

I’m working on an (five years) old cocos2dx project and I’m getting the following errors when debugging for AppleTV
Xcode 11 / tvOS 13 / cocos 2d-x 3.10

Apple Mach-O Linker (ld) Error

Undefined symbols for architecture arm64:
  "cocos2d::TextureCube::create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)", referenced from:
      cocos2d::CameraBackgroundSkyBoxBrush::create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in libcocos2d tvOS.a(CCCameraBackgroundBrush.o)
  "cocos2d::TextureCube::setTexParameters(cocos2d::Texture2D::_TexParams const&)", referenced from:
      cocos2d::CameraBackgroundSkyBoxBrush::create(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in libcocos2d tvOS.a(CCCameraBackgroundBrush.o)
  "RatingLayer::create()", referenced from:
      ParallaxApplication::createAndShowRatingLayer() in ParallaxApplication.o
  "RatingLayer::acquireBackdrop()", referenced from:
      ParallaxApplication::createAndShowRatingLayer() in ParallaxApplication.o
  "RatingLayer::setReturnCallback(std::__1::function<void ()>)", referenced from:
      ParallaxApplication::createAndShowRatingLayer() in ParallaxApplication.o
  "RatingLayer::hide()", referenced from:
      ParallaxApplication::ratingLayerCallback() in ParallaxApplication.o
  "RatingLayer::show()", referenced from:
      ParallaxApplication::createAndShowRatingLayer() in ParallaxApplication.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

The code runs fine on iOS and macOS. This problem appears only on tvOS.
I’m not an experience coder but I know that the guys who build this code were. I’ve been stuck on this for the last two days and I feel I’m missing something stupid.
Any guidance is very appreciated.
Thanks in advance

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