I would only like to add that it is probably caused by the call to the wrong version of strlcat (probably issue with defined flags in C code).
I believe that for some reason it is trying to call ___builtin__strlcat_chk which is probably only available on iOS7.
I was able to get rid of the issue by changing the base sdk back to iOS6.1.
For information how to change XCode's base skd have a look at SO ios6 - Is it possible to install iOS 6 SDK on Xcode 5? - Stack Overflow
What version of Rhodes?
Rhodes 3.x does NOT support either iOS7 or xCode5. You need to build for iOS6 (will run on iOS7, with a few minor glitches) using Xcode 4.
If you want to build for iOS7 and build with xCode5, you need to use Rhodes 4.x.
I don't think there are any plans to make Rhodes 3.x work for iOS7/XCode5.
I am using Rhodes 4.x and Xcode 5.0.2.