title: Xcode : warning: directory not found for option
body: <pre><code>Ld /Users/pwang/Library/Developer/Xcode/DerivedData/socketiohldwxnslzhlnjtgihgewdwavpjpb/Build/Products/Debug-iphoneos/socketio.app/socketio normal armv7
  cd /Users/pwang/Desktop/saturngod-Socket.io-with-iOS-be51414
  setenv IPHONEOS_DEPLOYMENT_TARGET 4.3
  setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
  /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk -L/Users/pwang/Library/Developer/Xcode/DerivedData/socketio-hldwxnslzhlnjtgihgewdwavpjpb/Build/Products/Debug-iphoneos -L/Users/pwang/Desktop/saturngod-Socket.io-with-iOS-be51414/socketio/simulator -L/Users/pwang/Desktop/saturngod-Socket.io-with-iOS-be51414/socketio/device -F/Users/pwang/Library/Developer/Xcode/DerivedData/socketio-hldwxnslzhlnjtgihgewdwavpjpb/Build/Products/Debug-iphoneos -F/Users/pwang/Desktop/saturngod-Socket.io-with-iOS-be51414/socketio -filelist   /Users/pwang/Library/Developer/Xcode/DerivedData/socketio-hldwxnslzhlnjtgihgewdwavpjpb/Build/Intermediates/socketio.build/Debug-iphoneos/socketio.build/Objects-normal/armv7/socketio.LinkFileList -dead_strip -lz -licucore -miphoneos-version-min=4.3 -framework MobileCoreServices -framework Foundation -lz -lxml2 -framework SystemConfiguration -framework CFNetwork -framework UIKit -framework CoreGraphics -o /Users/pwang/Library/Developer/Xcode/DerivedData/socketio-hldwxnslzhlnjtgihgewdwavpjpb/Build/Products/Debug-iphoneos/socketio.app/socketio
  
  ld: warning: directory not found for option '-L/Users/pwang/Desktop/saturngod-Socket.io-with-iOS-be51414/socketio/simulator'
  ld: warning: directory not found for option '-L/Users/pwang/Desktop/saturngod-Socket.io-with-iOS-be51414/socketio/device'
  </code></pre>
  
  <p>can you give me some clue to remove the warning,thank you.</p>