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* libsupc++/compare (common_comparison_category): Define without using concepts and optimise for compilation time. (__detail::__cmp_cat_ids): Remove. (__detail::__common_cmp_cat): Replace class template and specializations with constexpr function. From-SVN: r279307
file: libstdc++-v3/README New users may wish to point their web browsers to the file index.html in the 'doc/html' subdirectory. It contains brief building instructions and notes on how to configure the library in interesting ways.