[jira] [Created] (ARROW-9492) [C++] Ensure private functions are static or in an anonymous namespace

["Ben Kietzman (Jira)" <ji...@apache.org>]

Ben Kietzman created ARROW-9492:
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             Summary: [C++] Ensure private functions are static or in an anonymous namespace
                 Key: ARROW-9492
                 URL: https://issues.apache.org/jira/browse/ARROW-9492
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
    Affects Versions: 0.17.1
            Reporter: Ben Kietzman


There are a number of functions which are not intended to be exported (for example, they are defined in a {{.cc}} file) but are not marked {{static inline}} or declared in an anoymous namespace. This can lead to surprising link errors. Existing private functions should be marked appropriately, and ideally a linter could be assembled to ensure new ones are not added without appropriate markings.



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