Yesterday (3/10/14) when iOS 7.1 was released I also upgraded to Xcode 5.1 and found that my PhoneGap/Cordova project would no longer compile to my iPhone 5s. I also upgraded Cordova to the most recent release: v 3.4.0-0.1.3.

I have read many different solutions on SO that relate so changing active architectures and building only active architectures, and none of them work. So here's what I've tried and the errors I get. Initially I got the error:

missing required architecture arm64 in file <long file path omitted> libCordova.a
Undefined symbols for architecture arm64

So I tried the following. I selected the CordovaLib sub-project in my project, and in both the project and target, I went to Build Settings under Architectures and made sure that arm64 was not included in any of the Debug or Release architectures. At this time Build Active Architecture Only is set to "Yes". That resulted in the following error:

file was built for archive which is not the architecture being linked (armv7): 
<long file path omitted> libCordova.a
Undefined symbols for architecture armv7

Setting Build Active Architecture Only to "No", the error again becomes:

missing required architecture arm64 in file <long file path omitted> libCordova.a
Undefined symbols for architecture arm64

I'm not sure what else to try. The project's architecture settings only includes the key "Base SDK" which is set to iOS 7.1. The project's target does not have architectures settings. Anyway I'm fairly certain the problem lies with the embedded CordovaLib sub-project. What can I do to make this thing compile to my device successfully?

Update: same issue on Apache's Jira: https://issues.apache.org/jira/browse/CB-6223