undefined reference to protobuf when building a fork of Caffe

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Darian Boggs

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Nov 27, 2017, 5:27:03 PM11/27/17

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I'm receiving this message:

.build_release/lib/libcaffe.a(math_functions.o):math_functions.cpp:(.text._ZN6google17MakeCheckOpStringIfiEEPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_RKT0_PKc[_ZN6google17MakeCheckOpStringIfiEEPNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKT_RKT0_PKc]+0x56): more undefined references to `google::base::CheckOpMessageBuilder::NewString[abi:cxx11]()' follow

when I try to build a fork of Caffe. I think it is related to the version of protobuf.

Is this related to the version of protobuf, and if I so, how can I tell what version I need?