Xcode 7 warning: could not resolve external type …

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From: https://forums.developer.apple.com/thread/17921

warning: Could not resolve external type _ZTSNSt3__16vectorINS_12basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEENS4_IS6_EEE24__RAII_IncreaseAnnotatorE

Turn off the setting “Precompile Prefix Header” in the third-party library “Build Settings” (e.g. libcocos2dx)