[Bug c++/39159] unhelpful attribute warning on matching declaration after definition

[wipedout at yandex dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=39159

wipedout at yandex dot ru changed:

           What    |Removed                     |Added
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                 CC|                            |wipedout at yandex dot ru

--- Comment #4 from wipedout at yandex dot ru ---
Tons of warnings like this arise when porting code from Visual C++ to gcc.
Visual C++ supports "interface" keyword and you can have "interface Interface;"
many times - both above and before the actual definition. "interface" has to be
mapped to exactly "struct __attribute__ ((visibility ("default")))" and so the
code which originally compiled no problem causes hundreds of warnings with gcc.