title: Undefined symbols for architecture armv7: "_SCNetworkReachabilityCreateWithAddress"
body: <p>Right this has become a right pain I have been looking at it for 2 days now and can't seem to solve it. Here is the error I am getting.</p>
  
  <pre class="lang-sh prettyprint-override"><code>Undefined symbols for architecture armv7:
  "_SCNetworkReachabilityCreateWithAddress", referenced from:
    +[Reachability reachabilityWithAddress:] in Reachability.o
  "_SCNetworkReachabilityCreateWithName", referenced from:
    +[Reachability reachabilityWithHostName:] in Reachability.o
  "_SCNetworkReachabilityUnscheduleFromRunLoop", referenced from:
    -[Reachability stopNotifier] in Reachability.o
  "_SCNetworkReachabilityScheduleWithRunLoop", referenced from:
    -[Reachability startNotifier] in Reachability.o
  "_SCNetworkReachabilitySetCallback", referenced from:
    -[Reachability startNotifier] in Reachability.o
  "_SCNetworkReachabilityGetFlags", referenced from:
    -[Reachability connectionRequired] in Reachability.o
    -[Reachability currentReachabilityStatus] in Reachability.o
  ld: symbol(s) not found for architecture armv7
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>
  
  <p>I have added <strong>SystemConfiguration.framework</strong> and it doesn't seem to want to do anything with it as this error just won't go away. I have looked at quite a few of the same problem but a lot of them done confirm any answers. This kind of just developed over the weekend when no one had touched it. Can anyone help.</p>
  
  <p><strong>EDIT</strong> 
  Forgot to add this bit.</p>
  
  <blockquote>
    <p>ld: warning: ignoring file /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk/System/Library/Frameworks//SystemConfiguration.framework/SystemConfiguration, missing required architecture armv7 in file</p>
  </blockquote>
  
  <p><strong>EDIT</strong></p>
  
  <p>Right Thanks to @gaige I have found a problem; there is an extra slash just before SystemConfiguration.framework that shouldn't be there. I have removed the framework and re-added and that has not helped. How can I remove this extra slash?</p>