hello I also encountered the same problem
When I execute xcodebuild I get an error
** BUILD FAILED **
The following build commands failed:
PhaseScriptExecution CMake\ Rules build/event.build/Debug/Event.build/Script-7A989E44B7824512A9BAE8D6.sh
CompileC build/event.build/Debug/Event.build/Objects-normal/x86_64/G__Event.o build/G__Event.cxx normal x86_64 c++ com.apple.compilers.llvm.clang.1_0.compiler
Ld build/Debug/libEvent.dylib normal x86_64
Ld build/Debug/Main normal x86_64