I cannot seem to fix this problem. Can you please help. Thank you
Pruning compilation results...
+ Pre-parsing project files...
+ Building GoogleDataTransport for iphoneos (configuration: Release)
+ [arm64] Compiling GoogleDataTransport/GoogleDataTransport/GDTCORLibrary/GDTCORAssert.m...
+ [arm64] Compiling GoogleDataTransport/GoogleDataTransport/GDTCORLibrary/GDTCORClock.m...
+ [arm64] Compiling GoogleDataTransport/GoogleDataTransport/GDTCORLibrary/GDTCORConsoleLogger.m...
+ [arm64] Compiling GoogleDataTransport/GoogleDataTransport/GDTCORLibrary/GDTCORDataFuture.m...
+ [arm64] Compiling GoogleDataTransport/GoogleDataTransport/GDTCORLibrary/GDTCOREvent.m...
+ [arm64] Compiling GoogleDataTransport/GoogleDataTransport/GDTCORLibrary/GDTCORFlatFileStorage.m...
+ [arm64] Compiling GoogleDataTransport/GoogleDataTransport/GDTCORLibrary/GDTCORLifecycle.m...
+ [arm64] Compiling GoogleDataTransport/GoogleDataTransport/GDTCORLibrary/GDTCORPlatform.m...
+ [arm64] Compiling GoogleDataTransport/GoogleDataTransport/GDTCORLibrary/GDTCORReachability.m...
+ [arm64] Compiling GoogleDataTransport/GoogleDataTransport/GDTCORLibrary/GDTCORRegistrar.m...
+ [arm64] Compiling GoogleDataTransport/GoogleDataTransport/GDTCORLibrary/GDTCORTransformer.m...
+ [arm64] Compiling GoogleDataTransport/GoogleDataTransport/GDTCORLibrary/GDTCORTransport.m...
+ [arm64] Compiling GoogleDataTransport/GoogleDataTransport/GDTCORLibrary/GDTCORUploadCoordinator.m...
+ [arm64] Compiling GoogleDataTransport/GoogleDataTransport/GDTCORLibrary/GDTCORUploadPackage.m...
+ [arm64] Compiling GoogleDataTransport/../Target Support Files/GoogleDataTransport/GoogleDataTransport-dummy.m...
+ [arm64] Linking GoogleDataTransport...
+ [arm64] Relinking GoogleDataTransport with extra flags: -framework CoreFoundation -framework Foundation -framework CoreTelephony
Undefined symbols for architecture arm64:
"_OBJC_CLASS_$_NSURL", referenced from:
objc-class-ref in GDTCORDataFuture.m.obj
objc-class-ref in GDTCOREvent.m.obj
objc-class-ref in GDTCORPlatform.m.obj
"_OBJC_CLASS_$_NSObject", referenced from:
_OBJC_CLASS_$_GDTCORClock in GDTCORClock.m.obj
_OBJC_CLASS_$_GDTCORDataFuture in GDTCORDataFuture.m.obj
_OBJC_CLASS_$_GDTCOREvent in GDTCOREvent.m.obj
_OBJC_CLASS_$_GDTCORFlatFileStorage in GDTCORFlatFileStorage.m.obj
_OBJC_CLASS_$_GDTCORLifecycle in GDTCORLifecycle.m.obj
_OBJC_CLASS_$_GDTCORApplication in GDTCORPlatform.m.obj
_OBJC_CLASS_$_GDTCORReachability in GDTCORReachability.m.obj
...
"_OBJC_CLASS_$_NSData", referenced from:
objc-class-ref in GDTCOREvent.m.obj
objc-class-ref in GDTCORFlatFileStorage.m.obj
objc-class-ref in GDTCORPlatform.m.obj
"_OBJC_CLASS_$_NSAssertionHandler", referenced from:
objc-class-ref in GDTCORPlatform.m.obj
"_OBJC_METACLASS_$_NSObject", referenced from:
_OBJC_METACLASS_$_GDTCORClock in GDTCORClock.m.obj
_OBJC_METACLASS_$_GDTCORDataFuture in GDTCORDataFuture.m.obj
_OBJC_METACLASS_$_GDTCOREvent in GDTCOREvent.m.obj
_OBJC_METACLASS_$_GDTCORFlatFileStorage in GDTCORFlatFileStorage.m.obj
_OBJC_METACLASS_$_GDTCORLifecycle in GDTCORLifecycle.m.obj
_OBJC_METACLASS_$_GDTCORApplication in GDTCORPlatform.m.obj
_OBJC_METACLASS_$_GDTCORReachability in GDTCORReachability.m.obj
...
"_OBJC_CLASS_$_NSKeyedUnarchiver", referenced from:
objc-class-ref in GDTCORFlatFileStorage.m.obj
objc-class-ref in GDTCORPlatform.m.obj
objc-class-ref in GDTCORUploadPackage.m.obj
"_OBJC_CLASS_$_NSNumber", referenced from:
objc-class-ref in GDTCORClock.m.obj
objc-class-ref in GDTCOREvent.m.obj
objc-class-ref in GDTCORFlatFileStorage.m.obj
objc-class-ref in GDTCORPlatform.m.obj
objc-class-ref in GDTCORRegistrar.m.obj
objc-class-ref in GDTCORTransformer.m.obj
objc-class-ref in GDTCORUploadCoordinator.m.obj
...
"_OBJC_CLASS_$_NSFileManager", referenced from:
objc-class-ref in GDTCORFlatFileStorage.m.obj
objc-class-ref in GDTCORPlatform.m.obj
"_OBJC_CLASS_$_NSString", referenced from:
objc-class-ref in GDTCORConsoleLogger.m.obj
objc-class-ref in GDTCOREvent.m.obj
objc-class-ref in GDTCORFlatFileStorage.m.obj
objc-class-ref in GDTCORPlatform.m.obj
objc-class-ref in GDTCORTransformer.m.obj
objc-class-ref in GDTCORTransport.m.obj
objc-class-ref in GDTCORUploadCoordinator.m.obj
...
"_OBJC_CLASS_$_NSMutableDictionary", referenced from:
objc-class-ref in GDTCORFlatFileStorage.m.obj
objc-class-ref in GDTCORRegistrar.m.obj
objc-class-ref in GDTCORUploadCoordinator.m.obj
"_OBJC_CLASS_$_NSBundle", referenced from:
objc-class-ref in GDTCORPlatform.m.obj
"_OBJC_CLASS_$_NSError", referenced from:
objc-class-ref in GDTCORFlatFileStorage.m.obj
objc-class-ref in GDTCORPlatform.m.obj
"_OBJC_CLASS_$_NSMutableSet", referenced from:
objc-class-ref in GDTCORFlatFileStorage.m.obj
objc-class-ref in GDTCORUploadCoordinator.m.obj
"_OBJC_CLASS_$_NSSet", referenced from:
objc-class-ref in GDTCORFlatFileStorage.m.obj
objc-class-ref in GDTCORUploadCoordinator.m.obj
objc-class-ref in GDTCORUploadPackage.m.obj
"_OBJC_CLASS_$_NSArray", referenced from:
objc-class-ref in GDTCORUploadCoordinator.m.obj
"_OBJC_CLASS_$_NSMutableOrderedSet", referenced from:
objc-class-ref in GDTCORFlatFileStorage.m.obj
"_OBJC_CLASS_$_NSNotificationCenter", referenced from:
objc-class-ref in GDTCORLifecycle.m.obj
objc-class-ref in GDTCORPlatform.m.obj
"_OBJC_CLASS_$_NSDictionary", referenced from:
objc-class-ref in GDTCORPlatform.m.obj
"_OBJC_CLASS_$_CTTelephonyNetworkInfo", referenced from:
objc-class-ref in GDTCORPlatform.m.obj
"_OBJC_CLASS_$_NSKeyedArchiver", referenced from:
objc-class-ref in GDTCORPlatform.m.obj
"_OBJC_CLASS_$_NSTimer", referenced from:
objc-class-ref in GDTCORUploadPackage.m.obj
ld: suggested extra flags: -framework CoreFoundation -framework Foundation -framework CoreTelephony
ld: 21 symbol(s) not found for architecture arm64