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https://issues.apache.org/jira/browse/ARROW-711?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-711.
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Resolution: Won't Fix
It seems extern template, despite the symbol visibility issues (gcc not liking
visibility modifiers), is the right tool to keep using
> [C++] Remove extern template declarations for NumericArray<T> types
> -------------------------------------------------------------------
>
> Key: ARROW-711
> URL: https://issues.apache.org/jira/browse/ARROW-711
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
> Assignee: Wes McKinney
>
> It seems that linkers have diverging semantics around visibility when using
> the {{extern template}} declaration (see linker errors in
> https://ci.appveyor.com/project/ApacheSoftwareFoundation/arrow/build/1.0.841).
> Since the only thing impacted right now is the {{NumericArray<T>}}
> constructor, removing these doesn't seem too onerous. I ran the existing
> benchmarks and looked at the library sizes before and after, and there
> doesn't appear to be a meaningful difference.
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