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?
Change:
- Architectures:
Standard - Valid Architectures:
arm64 armv7 armv7s
To:
- Architectures:
armv7 armv7s - Valid Architectures:
armv7 armv7s
Remove armv64 in
Project > Build Settings > Architectures> Valid Architectures
( i.e. leave only armv7 and armv7s )
Also, set Build Active Architectures Only to NO.
来源：https://stackoverflow.com/questions/22341511/how-to-link-with-framework-without-arm64-support-in-xcode-5-1