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        For GCC 4.8.1 it was not yet possible to use typeinfo
        for float_128 on GCC: see
        GCC 43622.
      
        So this code (to display the mangled name) failed to link undefined
        reference to
        typeinfo for
        __float128
      
std::cout << typeid(boost::float128_t).name() << std::endl;
This prevent using the existing tests for Boost.Math distributions, (unless a few lines are commented out) and if a MACRO BOOST_MATH_INSTRUMENT controlling them is defined then some diagnostic displays in Boost.Math will not work.
However this was only used for display purposes and could be commented out until this was fixed in GCC 5.
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          Not all managed names can be displayed
          using  |