Hi,

Sean has left the following comment at Fix Mac OS X compilation errors under Buildbot http://www.google-melange.com/gci/task/view/google/gci2012/8081208:


hmm.


Looks better except that it's generally more desirable to test for features that to test for platforms, compilers, or similar "generalizations". That is to say that you probably don't need the CMAKE_C_COMPILER_ID MATCHES "Clang" protection since if a compiler supports that warning option, then we probably want to use it.

HOWEVER, the other issue is that the warning is being addressed by turning off the warning! That's generally not our practice. At least, not without first investigating and exhausting all other options. Without that attempt, turning off the warning is wrong.

That's a relatively new warning flag to me that I've not yet researched in depth. My cursory understanding is that it will warn if we take the offset of an "extended" field specification, like that magic offset in the other patch. What's an actual error that comes up if you leave the warning enabled?


Greetings,
The Google Open Source Programs Team


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