I get this error

Error (Xcode): Undefined symbol: __swift_FORCE_LOAD_$_swift_Builtin_float
Error (Xcode): Undefined symbol: __swift_FORCE_LOAD_$_swift_errno
Error (Xcode): Undefined symbol: __swift_FORCE_LOAD_$_swift_math
Error (Xcode): Undefined symbol: __swift_FORCE_LOAD_$_swift_signal
Error (Xcode): Undefined symbol: __swift_FORCE_LOAD_$_swift_stdio
Error (Xcode): Undefined symbol: __swift_FORCE_LOAD_$_swift_time
Error (Xcode): Undefined symbol: __swift_FORCE_LOAD_$_swiftsys_time
Error (Xcode): Undefined symbol: __swift_FORCE_LOAD_$_swiftunistd
Error (Xcode): Linker command failed with exit code 1 (use -v to see invocation)