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[jira] [Created] (ARROW-3522) [C++] Remove -Wconversion from build flags


Antoine Pitrou created ARROW-3522:
-------------------------------------

             Summary: [C++] Remove -Wconversion from build flags
                 Key: ARROW-3522
                 URL: https://issues.apache.org/jira/browse/ARROW-3522
             Project: Apache Arrow
          Issue Type: Wish
          Components: C++
    Affects Versions: 0.11.0
            Reporter: Antoine Pitrou


I would request removing {{-Wconversion}} from the CI build flags. It is overly finicky, generating errors for things such as converting a {{size_t}} to {{double}}. Furthermore, {{gbenchmark}} fails building with it, making it difficult to exercise locally.

I will mention that MSVC's conversion warnings are vastly more reasonable.



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