Fixed error
Command Output (stderr): -- fatal error: error in backend: Objective-C support is unimplemented for object file format
Source code in clang/lib/CodeGen/CGObjCMac.cpp:5080
case llvm::Triple::Wasm:
case llvm::Triple::GOFF:
case llvm::Triple::SPIRV:
case llvm::Triple::XCOFF:
case llvm::Triple::DXContainer:
  llvm::report_fatal_error(
      "Objective-C support is unimplemented for object file format");
}
We see GOFF in the same list.