CocoaPods error

[vmirgorod]

I'm using CocoaPods 0.39.0.rc.1
Now, when i try to build installed FSK packet, Xcode (7.0) gives me an error.
Undefined symbols for architecture arm64:
"OBJC_CLASS$_FSKRecognizer", referenced from:
type metadata accessor for ObjectiveC.FSKRecognizer in FSKDataManager.o
"OBJC_CLASS$_FSKSerialGenerator", referenced from:
type metadata accessor for ObjectiveC.FSKSerialGenerator in FSKDataManager.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I've checked build phases list.
Necessary sources are missed.
I guess they should be added, and probably minor refactoring (names) should be done too.