Robotino 3 (Ubuntu 16.04) のRefBoxでの-std=c++14

/home/robotino/Downloads/rcll-refbox/src/libs/mps_comm/machine_factory.cpp:75:11: error: ‘make_unique’ is not a member of ‘std’
    return std::make_unique<MockupBaseStation>(name);
           ^

このエラーが出たら，

vi src/libs/mps_comm/Makefile 
OBJS_all = $(OBJS_libmps_comm)
LIBS_all = $(LIBDIR)/libmps_comm.so
CFLAGS += -std=c++14

CFLAGS に-std=c++14 を追加．