undefined reference to symbol '_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc@@GLIBCXX_3.4.21'undefined reference to symbol '_ZNSt7__cxx11
阅读背景：
libstdc++.so.6: error adding symbols: DSO missing from command line(Qt+ros)
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