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https://issues.apache.org/jira/browse/ARROW-4617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16775073#comment-16775073
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Uwe L. Korn commented on ARROW-4617:
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Taking care of this in the CMake refactoring

> [C++] Support double-conversion<3.1
> -----------------------------------
>
>                 Key: ARROW-4617
>                 URL: https://issues.apache.org/jira/browse/ARROW-4617
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: C++, Packaging, R
>            Reporter: Uwe L. Korn
>            Assignee: Uwe L. Korn
>            Priority: Major
>
> At the moment, we require {{double-conversion>=3.1}} but distributions are 
> all mostly on 2.1 or 3.0. We should support them 
> Nice side-effect is that {{double-conversion}} is not good in updating their 
> version number. So thus 3.0 report itself as 2.0.1 and 3.1.x as 3.0 in the 
> CMake definitions. Thus we cannot rely on their version number reporting for 
> detecting the version.



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