title: libtool failed with exit code 1
body: <p>I attempt to Create a Xcode-WorkSpace,there are there projects in it. Now the first Project is a static library  base on ZBar Code Reader.I already download the source code ,now I drag the finder named "src" into my first project. When I bulid it,here is the problem:</p>
  
  <pre><code>Libtool /Users/asset/Library/Developer/Xcode/DerivedData/huishow1-efdjffeirjufbndvocvtzkrzkwss/Build/Products/Debug-iphonesimulator/libZBarTest.a normal i386
      cd /Users/asset/iPhone_Tmp/ZBarTest
      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/libtool -static -arch_only i386 -syslibroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk -L/Users/asset/Library/Developer/Xcode/DerivedData/huishow1-efdjffeirjufbndvocvtzkrzkwss/Build/Products/Debug-iphonesimulator -L/Users/asset/iPhone_Tmp/ZBarTest/SDK -L/Users/asset/iPhone_Tmp/ZBarTest/SDK3 -filelist /Users/asset/Library/Developer/Xcode/DerivedData/huishow1-efdjffeirjufbndvocvtzkrzkwss/Build/Intermediates/ZBarTest.build/Debug-iphonesimulator/ZBarTest.build/Objects-normal/i386/ZBarTest.LinkFileList -lxml2 -ObjC -framework Foundation -lzbar -o /Users/asset/Library/Developer/Xcode/DerivedData/huishow1-efdjffeirjufbndvocvtzkrzkwss/Build/Products/Debug-iphonesimulator/libZBarTest.a
  
  Command /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/libtool failed with exit code 1
  </code></pre>
  
  <p>Who can help me?</p>