[llvm-bugs] [Bug 35944] incorrect weak-vtables warning on abstract base class

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=35944

Christian Maaser <llvm at boxie.eu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Christian Maaser <llvm at boxie.eu> ---
The reason for this warning seems to be that a pure virtual destructor's
definition cannot be key function for where to place the vtable. See 
https://stackoverflow.com/questions/28786473/clang-no-out-of-line-virtual-method-definitions-pure-abstract-c-class/40550578
and
http://clang.llvm.org/doxygen/classclang_1_1ASTContext.html#a439522ed0cae62952acae5f30f283de2

> NOTE: In the abstract, a pure virtual destructor could be used as the key
> function, as it must be defined even though it is pure. However, the ABI
> committee did not realize this fact until after the specification of key
> function was complete; therefore a pure virtual destructor cannot be the
> key function.

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