Quick tip: Architecture not supported when compiling for iOS 7.1 using XCode 5.1

Using configuration mentioned above you may receive one of those (or another) errors:

types.h - User Defined Issues - Architecture not supported
_types.h - User Defined Issues - Architecture not supported
Semantic issue - Unknown type name '__int64_t', Unknown type name '__int32_t', Unknown type name '__uint64_t', Unknown type name '__uint32_t', Unknown type name '__darwin_natural_t'..

Working solution is to remove arm64 from “Standard Architectures” and leave arm64 in “Valid Architectures”