Undefined symbols for architecture armv7: “_SCNetw

问题:

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.

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)

I have added SystemConfiguration.framework 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.

EDIT Forgot to add this bit.

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

EDIT

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?

回答1:

Normally, extra slashes won't muck up a UNIX-like build process.

But, you do need to make sure the armv7 architecture is inside the framework file that your build is trying to use. To do this, use the lipo -info command at the command line:

lipo -info /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer‌​/SDKs/iPhoneOS5.1.sdk/System/Library/Frameworks//SystemConfiguration.framework/Sy‌​stemConfiguration

You should see output like this:

Architectures in the fat file: SystemConfiguration are: armv6 armv7

If you don't, your project is probably set up to link to the wrong version of the SystemConfiguration.framework. There's multiple versions of that framework on your machine. So, I would verify the path of the framework (i.e. SystemConfiguration) that you have in your project.

Normally, I would expect that file to be something like this (adjusted for the OS version you're using):

/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/System/Lib‌​rary/Frameworks/SystemConfiguration.framework

回答2:

I have had this problem for about 8 hrs with a Cordova project and the org.apache.cordova.network-information plugin. By the answers above and several other answers, I was encouraged to search in the section Project > Target > Build Phases > Link Binary with Libraries of Xcode, which was right.

But although SCNetworkReachabilityCreateWithAddress is defined in SystemConfigration.framework, I was not able to get rid of the linker errors by systematically adding and removing this and other libraries.

Finally, I created a new project with the plugin and copied the framework constellation exactly as the original was. Now it's working.

Conclusion:

• If possible, create a new project with the necessary extensions and copy the constellations from it. It might help.
• Sometimes, a library is too much included, so uncheck it. Sometimes it is the other way round.
• To dig deeper, check the SystemConfiguration.framework as described in the outstanding answers above. It might mismatch the target architecture. Further, check for strange chars in build including paths.

回答3:

I simply cleaned and restarted xcode and it worked.