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Re: Compiling GCC with g++: a report

* Christoph Hellwig:

> Why can't libstdc++ use symbol versioning?

Via stack allocation, templates and inline functions, the internal
representation of libstdc++ data structures is exported.  All of its
users would have to be versioned, too, and you'd need bridging code
between the ABIs (e.g. to pass a std::string from a v6 library to a v7
library).
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