error: no template named 'conditional_t' in namespace 'std'; did you mean 'conditional'?
The template alias conditional_t is not available in C++11; it was added in C++14, as were most of the other type trait *_t versions. Therefore, C++14 is required to build the boost library.
The error while building boost:
The template alias
conditional_tis not available in C++11; it was added in C++14, as were most of the other type trait*_tversions. Therefore, C++14 is required to build the boost library.