Question

I was doing the Apple Core Data Tutorial, and on the first occasion I was suggested to build the project, I got this error:

Ld /Users/user/Library/Developer/Xcode/DerivedData/Locations-fajvunxiruohofbhzimrgekrpnqh/Build/Products/Debug-iphonesimulator/Locations.app/Locations normal i386
    cd "/Users/user/Documents/xcode projects/Locations"
    setenv MACOSX_DEPLOYMENT_TARGET 10.6
    setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/llvm-gcc-4.2 -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk -L/Users/user/Library/Developer/Xcode/DerivedData/Locations-fajvunxiruohofbhzimrgekrpnqh/Build/Products/Debug-iphonesimulator -F/Users/user/Library/Developer/Xcode/DerivedData/Locations-fajvunxiruohofbhzimrgekrpnqh/Build/Products/Debug-iphonesimulator -filelist /Users/user/Library/Developer/Xcode/DerivedData/Locations-fajvunxiruohofbhzimrgekrpnqh/Build/Intermediates/Locations.build/Debug-iphonesimulator/Locations.build/Objects-normal/i386/Locations.LinkFileList -mmacosx-version-min=10.6 -Xlinker -objc_abi_version -Xlinker 2 -framework UIKit -framework Foundation -framework CoreGraphics -framework CoreData -o /Users/user/Library/Developer/Xcode/DerivedData/Locations-fajvunxiruohofbhzimrgekrpnqh/Build/Products/Debug-iphonesimulator/Locations.app/Locations

Undefined symbols for architecture i386:
  "_OBJC_CLASS_$_CLLocationManager", referenced from:
      objc-class-ref in RootViewController.o
  "_kCLLocationAccuracyNearestTenMeters", referenced from:
      -[RootViewController locationManager] in RootViewController.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status

I use XCode 4.0.2, Mac OS X 10.6.8. What can be the cause of this? I followed the tutorial step-by-step and have absolutely no idea what could go wrong.

Answer 1

You need to import the CoreLocation framework. This can be done by going to the Project – Build Phases – Link Binary with Libraries