viirya edited a comment on pull request #2297:
URL: https://github.com/apache/hadoop/pull/2297#issuecomment-691712861


   Checked the cc warnings and the related code. They are committed long time 
ago, e.g., 2014, and not touched here. Many of the cc warnings are `warning: 
dynamic exception specifications are deprecated in C++11 [-Wdeprecated]`. I 
guess it is either due to that we didn't check such warnings when the code was 
committed, or compilation tools upgrade? I think it is not caused by this 
change. Because we removed some .c and .h files, so the CI build triggered 
related building.
   
   So I am not sure which one is good, fixing these compilation warnings, or 
ignoring them?
   
   


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