title: Objective-Zip iPhone IOS 5 issue
body: <p>I'm trying to use Objective-Zip on an IOS5 iPhone application and I get the following linkage error when I build my project:</p>
  
  <p>----------- <strong><em>*</em>**<em>*</em>**<em>*</em>****</strong>---------------</p>
  
  <p>Ld /Users/amirpeivandi/Library/Developer/Xcode/DerivedData/Zarvaragh-czcfescrnmgrljfojncagweywohi/Build/Products/Debug-iphonesimulator/Zarvaragh.app/Zarvaragh normal i386
      cd /Users/amirpeivandi/Documents/iPhoenApps/Zarvaragh
      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/clang -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk -L/Users/amirpeivandi/Library/Developer/Xcode/DerivedData/Zarvaragh-czcfescrnmgrljfojncagweywohi/Build/Products/Debug-iphonesimulator -F/Users/amirpeivandi/Library/Developer/Xcode/DerivedData/Zarvaragh-czcfescrnmgrljfojncagweywohi/Build/Products/Debug-iphonesimulator -filelist /Users/amirpeivandi/Library/Developer/Xcode/DerivedData/Zarvaragh-czcfescrnmgrljfojncagweywohi/Build/Intermediates/Zarvaragh.build/Debug-iphonesimulator/Zarvaragh.build/Objects-normal/i386/Zarvaragh.LinkFileList -mmacosx-version-min=10.6 -Xlinker -objc_abi_version -Xlinker 2 -Xlinker -no_implicit_dylibs -D__IPHONE_OS_VERSION_MIN_REQUIRED=40300 -lz -framework CoreGraphics -framework MobileCoreServices -framework SystemConfiguration -framework CFNetwork -framework UIKit -framework Foundation -o /Users/amirpeivandi/Library/Developer/Xcode/DerivedData/Zarvaragh-czcfescrnmgrljfojncagweywohi/Build/Products/Debug-iphonesimulator/Zarvaragh.app/Zarvaragh</p>
  
  <p>Undefined symbols for architecture i386:
    "_OBJC_CLASS_$_ZipFile", referenced from:
        objc-class-ref in MainPageController.o
  ld: symbol(s) not found for architecture i386
  clang: error: linker command failed with exit code 1 (use -v to see invocation)</p>
  
  <p>----------- <strong><em>*</em>**<em>*</em>**<em>*</em>****</strong>---------------</p>
  
  <p>I have no problem running the Objective-Zip application that comes with the code and I have checked my code, my project settings and all I could think of and the two projects (mine and default Objective-Zip iPhone project) have the same identical settings!</p>
  
  <p>Any pointer would be greatly appreciated. I've been stuck for last couple of days on this silly thing. I've seen a few posts pointing to architecture supports and ARC setting but again I have two projects the way I see them identical one mine that is not compiling and one the one from Objective-Zip project that compiles and runs just fine!</p>
  
  <p>Thx
  Amir</p>