More questions about C++ linkage for ABI routines

[Mark Mitchell]

Folks --

Giving C++ linkage to __dynamic_cast means that its name, too, cannot
be determined independent of the target platform; its signature
depends on ptrdiff_t.  I think that `extern "C" __cxa_dynamic_cast'
would be better.  Otherwise, for example, a multi-platform debugger
must somehow have ugly platform-specific conditions in order to know
what function to call when the user types `dynamic_cast<S*> (&t)' at
the debugger's prompt.

--
Mark Mitchell                   mark at codesourcery.com
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