Hi Vincent,
I am not aware of a GCC C++ equivalent to the MSVC++ __declspec(novtable).
Since __declspec(novtable) is a hand-coded optimization, you should be able to get by without having one.
I'd be shocked if the absence of that (questionable!) optimization was sufficiently a performance penalty as to be warranted, even in contrived toy applications meant to exacerbate that situation. Unless profiling indicates otherwise -- then I'd be a believer.
--Eljay
MSDN article on __declspec(novtable):
http://msdn.microsoft.com/msdnmag/issues/0300/c/
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