After upgraded a project on Xcode 5.1, Product > Build gives the following warning and error:
ld: warning: ignoring file Dropbox/Dropbox.framework/Dropbox, missing required architecture arm64 in file Dropbox.framework/Dropbox (3 slices)
Undefined symbols for architecture arm64: "_OBJC_CLASS_$_DBPath", referenced from: objc-class-ref in DropboxViewController.o
It seems like the Dropbox.framework does not support arm64 yet.
What are the Xcode settings to remove arm64 support from the project to have a clean build?