[cfe-dev] -Wweak-vtables questions

[Somorjai, Akos]

Hi all,

I'm currently experimenting with clang 3.1 (from Xcode 4.4 package on OS X 10.7), and I turned on the warning mentioned above. Most of the time it gives the correct warning, but in some situations I'd need some clarification:

  1.  classes defined in .cpp files — is the compiler warns me because theoretically I can add this .cpp file into two separate modules/frameworks?
  2.  pure virtual interface classes — is the warning necessary here?
  3.  classes which are not exported from a module, so marked with __attribute__((hidden))? Also, classes whose parent class is exported from a module, but the derived class is not? — is the warning necessary here?

Thanks, Akos
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