c++ build flags, clang++, -Wnomismatched-tags?

[Matt Benjamin <mbenjamin@redhat.com>]

Hi Ceph C++ devs,

I notice building with clang lots of warnings like:

      'SequencerPosition' defined as a struct here but previously declared as a
      class [-Wmismatched-tags]
struct SequencerPosition {
^
/home/mbenjamin/dev/rgw/ceph-upstream/src/os/ObjectMap.h:24:1: note: did you
      mean struct here?
class SequencerPosition;
^~~~~
struct
3 warnings generated.

induced by -Wmismatched-tags, which apparently clang++ has by default.  As a ISO C++ developer, I don't think of "struct" as a token that can be mismatched with "class" in friend or forward declaration, but clearly the authors of this warning do.

I think my intuition would be to disable this warning.  What do others think?

Matt

-- 
Matt Benjamin
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